Design and adjustment of the carburetor 2107 1107010 20. Carburetor design: brief description and diagram

Carburetor

Description of design

The VAZ-2106 car is currently equipped with an Ozone carburetor of the DAAZ 2107-1107010-20 model. The VAZ-21065 uses a DAAZ 21053-1107010 carburetor (a model based on the Solex family of carburetors).

The Ozone carburetor is an emulsion type, two-chamber, with a falling flow. It has one balanced float chamber, two main metering systems, an enrichment device (econostat) in the second chamber, an autonomous idle system, transition systems of the first and second chambers, a diaphragm accelerator pump with a spray in the first chamber, an electromagnetic shut-off valve for the idle system, a spool valve device for removing crankcase gases into the rear throttle space, pneumatic drive of the throttle valve of the second chamber. The air damper control of the first chamber is manual, with cable drive. After the engine starts, the throttle automatically opens slightly starting device diaphragm type under the influence of vacuum in the intake manifold. The carburetor is equipped with a vacuum tap to control the ignition timing regulator.

Fuel is supplied to the carburetor through a strainer and needle valve. The valve is mechanically connected to the float and maintains a certain level of fuel in the float chamber.

From the float chamber, fuel flows through the main fuel jets (first and second chambers) into the emulsion wells and emulsion tubes, where it is mixed with air entering through the main air jets. The fuel-air emulsion flows through the nozzles into the small and large diffusers of the carburetor.

The fuel channel of the idle system is closed by the solenoid shut-off valve after the ignition is turned off. The normal state of the valve when energized is open.

The idle system takes fuel from the emulsion well of the first chamber. The fuel passes through the idle air jet, which is structurally combined with an electromagnetic shut-off valve, and is mixed with air entering through the idle air jet and the holes in the transition system of the first chamber. The resulting emulsion is fed through two channels (one has a calibrated hole - a nozzle, and the other has an adjusting screw, otherwise called a quality screw) to the hole blocked by the needle of the quantity screw, where it is additionally mixed with air and then enters the inlet pipeline through the emulsion hole. The composition of the mixture is regulated by the quality screw.

When the throttle valves are partially opened (before the main metering system is activated), the air-fuel mixture enters the chambers through transition holes - two in each chamber.

The econostat ensures that fuel flows directly from the float chamber into the econostat atomizer, which is located in the diffuser of the second chamber. The econostat switches on at maximum power modes, further enriching the working mixture.

The accelerator pump is a diaphragm type, mechanically driven from the throttle axis of the first chamber. When the damper is opened sharply, a portion of fuel is injected through the nozzle into the first chamber of the carburetor, enriching the mixture. The pump is equipped with ball valves. One valve - a check valve - is located in the channel connecting the float chamber with the cavity of the accelerator pump. It opens when the pump cavity is filled with fuel and closes when fuel is pumped through the diaphragm. The other valve is located in the sprayer. It opens under the pressure of the pumped fuel and closes under the weight of the ball as soon as the fuel supply stops. Excess fuel during injection flows through the bypass jet back into the float chamber.

Pump performance depends on the cam profile, the diameter of the bypass nozzle hole, the profile and length of the adjusting needle in the bypass nozzle channel. The accelerator pump cannot be adjusted during operation.

The starting device consists of an air damper, a choke control lever, a telescopic rod, a throttle drive rod, a diaphragm mechanism and a throttle control drive. When the drive handle (“choke”) is pulled out from the driver’s seat, the air damper closes and the throttle valve of the first chamber opens slightly by 0.7–0.8 mm (starting gap). At the first flashes in the cylinders, the vacuum behind the throttle valve is transmitted to the diaphragm, which opens the air damper through a rod and rod. The maximum opening value of the damper is regulated by the diaphragm stop screw located under the plug screw.

Carburetor

Ozone carburetor diagram

Calibration data for carburetor DAAZ 2107-1107010-20

Owners of Classic cars often encounter problems with dynamics and fuel consumption. Drivers call a car engine a heart, and a carburetor can easily be compared to a heart valve. It is on the last detail that depends dynamic characteristics depend on its correct adjustment. In this article we will learn about how the carburetor works (VAZ 2107 DAAZ). We will also look at how to regulate it correctly.

Basic design of DAAZ parts for classic VAZ models

The operation of any automobile internal combustion engine directly depends on the quality and quantity of the mixture of fuel and air. This very mixture is prepared directly by the carburetor. In addition, this device evenly distributes the mixture throughout the combustion chambers.

The carburetor (VAZ 2107 DAAZ) consists of several main parts. This is a diffuser, as well as a jet and a float chamber.

Device types

If the car has an old engine, then such cars are equipped with DAAZ 2107 - 1107010 carburetors. With new engines and a vacuum corrector it is used new model or modification. This is the DAAZ 2107 1107010-20 model.

These products are produced at the Dmitrovgrad Automotive Units Plant. This company has been producing various equipment for classic VAZ models for many years. DAAZ 2107 (carburetor) has earned special trust among drivers as being quite reliable.

Complex and high-precision device

A carburetor is a complex device consisting of many different components. But complete device necessary only for those who are professionally involved in setting up and adjusting these devices.

However, despite all the difficulties and a large number of details, let’s take a closer look at how this device works.

So, what kind of device does the DAAZ 2107 1107010 carburetor have? This device consists of a float chamber into which limited quantities fuel is supplied. The access to gasoline is closed by a needle valve, as well as a float, which appearance resembles a barrel. Gasoline is mixed in a special mixing chamber. The carburetor also consists of a throttle valve as well as an air valve. In addition to them, the device also includes jets. The fuel is atomized through a sprayer. One of the important components of a carburetor is diffusers. They work like nozzles and create an air flow configuration.

DAAZ 2107 carburetor: operating principle

When fuel enters the float chamber, the volume of fuel is regulated by the float. If it floats up, the needle mechanism will block the access of gasoline to the chamber. So, the camera in this case resembles a toilet cistern. Everything is the same here. But fuel is not supplied immediately. First it will go through special filter to cleanse yourself.

In addition to gasoline, air is supplied to the chambers through air jets, which has previously been cleaned in air filters. The air then forms a mixture with gasoline using special tubes and wells. Thus, a so-called emulsion is obtained.

But that is not all. Before entering the combustion chambers through a spray, the mixture passes through an econostat. Here the mixture undergoes additional enrichment.

Next, using sprayers, the mixture enters the diffusers. This is where the final preparation of the mixture takes place. The carburetor of the VAZ 2107 (DAAZ produced by DAAZ) is designed in such a way that fuel droplets in the diffusers are drawn into a high-speed air flow. Thus, the air-fuel mixture enters the center of the mixing chamber.

The gas pedal on VAZ cars regulates the position of the throttle valve, which is designed to supply the mixture directly to

What else is special about the DAAZ 2107 carburetor? Its design includes idle jets. In this mode, the mixture is taken only from the first fuel chamber. The principle and scheme of operation of the fuel chambers activates the second chamber only when the engine reaches operating temperatures. Camera II also turns on if you need to quickly gain momentum and high speed.

Differences in modifications

As you know, the latest models of VAZ 2107 and other versions are equipped with a new carburetor DAAZ 2107 1107010 20. Let's see what the difference is between this modification and the old carburetor 1107010.

According to information received from AvtoVAZ specialists, these two modifications are based on the same model. Here the fundamental difference between them is the economizer for forced idling. Model 1107010 has EPHH, and new modification is not equipped with this unit.

Although the DAAZ 2107 20 carburetor was not equipped with an economizer, it is equipped with a special nozzle for supplying fuel. The difference is that it is regulated by an electromagnetic shut-off valve. So, if the ignition is turned off, the fuel supply is cut off.

Carburetor DAAZ 2107 1107010 - adjustment

Before proceeding with the adjustment, you need to find out which of the two modifications is installed in your car. So, if the car is equipped with a vacuum ignition corrector, then ICE cars- this is the latest model of VAZ 2103 or 2106 engines, and the carburetor modification is new. If you haven’t found a vacuum corrector, then you have a DAAZ 2107 1107010 carburetor.

Basic faults

In order to make adjustments, you need to know a few typical faults. Since this unit is responsible for dynamic characteristics, breakdowns include:

• Problems starting the engine, engine sneezing.
• Jerks, jerking, frequent failures on the accelerator pedal.
• Lack of overclocking options.
• Increased fuel consumption.

So, if while operating your car you were able to detect one or more faults from this list, then the part needs repair.

You need to know that the maximum adjustment of the DAAZ 2107 1107010 carburetor is possible only with the unit removed. The process does not involve cleaning this device with lint or woolen rags. You also won’t need any wires to clean the jets.

When making adjustments yourself, you must first remove the cover from the assembly. Then you can proceed to adjusting the float chamber. It's comfortable.

Adjusting the float chamber

The float has free movement. The stroke size should be between 6.5 mm on one side and 14 mm on the other side. The stroke is adjusted using a special template.

If your chamber has a smaller distance, you will need to bend the needle valve tongue slightly.

Now you can adjust the operation of the needle valve. When the float rises, less fuel flows. If the throttle valve opens, fuel flow is higher and the float moves down. To adjust the float on the other side, you need to move the float back as far as possible and use the same template to check this parameter. If the distance is not 14 mm, then the fastening stop should be bent.

Setting up the launcher

Adjustment includes the process of adjusting the starting device. For older devices, it operates at a frequency of 1500 rpm. If you examine the DAAZ 2107 (carburetor for the “seven”) from the other side, you can see a special channel. If you remove the assembly and inspect it from behind, you can see the air supply channel.

To adjust, you first need to remove it. Then you need to turn the lever so that the air damper is completely closed. Next, you should turn the device over, and then measure the gaps between the damper and the wall. For our carburetor, the gap should be 0.85 mm. To adjust the gap to the required size, it is necessary to bend the drive rod.

Next you need to adjust the gap A. You can find it between the wall of the channel and the edge of the damper below. So, you need to close the damper and recess the starter rod. As a result, it will open, and the gap should be from 5 to 5.4 mm. To adjust, you need to turn the adjusting screw with a screwdriver.

Setting up idle speed

First, you should make sure that the engine must be at operating temperatures. To adjust, you need to rotate the quality adjustment screw fuel mixture, until they become maximum.

Now it’s worth turning the quality screw to add a little more speed.

The point of these operations is to ensure that the quality of the mixture is minimal, and the idle speed is from 850 to 900. These are the most optimal values ​​for carburetor engines of cars of the Classic family. You should not make revolutions more or less than this value, as they will be considered unstable and will entail increased wear of the crankshaft parts.

We've looked at several possible ways adjustments that you can do yourself. But if you are not confident in your actions, it is better to entrust your DAAZ 2107 (carburetor from the “seven”) to a specialist who is well versed in them.

Efficiency and reliability gasoline engine depends on the quality and quantity of the air-fuel mixture entering it, which, before the appearance injection engines was being prepared special device– carburetor. There are several types of carburetors, but in the “classic” VAZ only one was used - “float-type”. List of components and VAZ 2107 carburetor diagram similar for all carburetor modifications of the “seven”.

VAZ 2107 carburetor components

The carburetor consists of many parts, but to understand the principle of operation it can be divided into several functional components:

The principle of operation of the VAZ 2107 carburetor

The fuel pump supplies gasoline from the tank to the float chamber. Before entering it, gasoline passes through a mesh filter, which prevents clogging of the valve and jets.

The fuel dosage is regulated by a needle valve driven by a float, which, when the chamber is filled, floats up and forces the valve to close.

Engine power and efficiency depend on the correct ratio of gasoline and air contained in the fuel mixture entering the cylinders. For correct dosage, clean jets and working surfaces of the carburetor, smooth movement and absence of play in rods, drives and dampers are required. The advantage of a carburetor in comparison with modern ones injection systems in unpretentiousness. A carburetor engine can even operate on low-quality fuel, which can damage the injection system.

This principle of operation, like carburetor device VAZ 2107, is relevant for all VAZ models with a carburetor engine.

Signs of malfunction of the VAZ 2107 carburetor

The presence of problems in the operation of the carburetor can be judged by the following manifestations:

• “failure” when you press the gas pedal, when the car continues to move at the same speed for some time or slows down;
• “jerk” when you press the gas pedal, when the car starts to accelerate, then slows down and accelerates again;
• series of “jerks” or “failures” when moving;
• sluggish acceleration, loss of power;
• increased fuel consumption;
• difficult engine starting;
• increased or decreased idle speed;
• Rough operation or engine stalling at idle speed.

VAZ 2107 carburetor diagram is not too complicated, so you can repair and adjust the unit yourself.

Troubleshooting the VAZ 2107 carburetor

To restore the operation of the carburetor, you should inspect the condition of the components and parts, clean them and adjust them.

After disassembly, it is necessary to wash all carburetor parts and visually check for defects. Particular attention should be paid to the condition of the strainer and jets, which are especially susceptible to clogging, which is the most common cause of malfunction. Carburetor jets VAZ 2107 It is better to clean them by blowing them with compressed air.

After cleaning, you need to adjust the carburetor:

1. The needle valve is adjusted by bending the "tongue" of the float bracket. When the valve is open, the distance between the lid and the float should be 15 mm, when closed - 6-7 (in the air) and 1-2 (when immersed in a chamber with gasoline).
2. To adjust the starting system, simply remove the air filter. With the “suction” extended, the air damper should be open by a third, and the speed should be in the range of 3200-3600 rpm.
3. The idle speed should be adjusted when the engine is warm. First you need to achieve maximum speed by turning the mixture quality screw. Then, turning the quantity screw, achieve engine speed within 950-1050 rpm. Finally, use the quality screw to lower the speed by 100 rpm.

Now, knowing the structure and operating principle of the VAZ 2107 carburetor, you can adjust its operation if necessary.

Everyone's job car engine depends on the quantity and quality of the air-fuel mixture prepared by a special device called a carburetor. All carburetor systems create the mixture and help distribute it evenly among the cylinders. You can mix fuel with air flow in different ways. In the “classics”, which includes the VAZ 2107 carburetor, the so-called “float type” works.

On VAZ 2107 cars with older engines, a DAAZ 2107-1107010 carburetor is used, and on cars with 2106 engines, a DAAZ 2107-1107010-10 is used (in the absence of a vacuum corrector). The DAAZ 2107-1107010-20 modification is used on cars with a vacuum corrector and a new “six” engine. Their technical data is somewhat different, as will be shown in the table.

The technical characteristics of such carburetors have long been known; we present them below. They are also called “calibration characteristics”, or quantitative performance indicators.

DAAZ is a well-known abbreviation of the Dimitrovgrad Automobile Unit Plant. The operation of his carburetors and their installation on “classics” lasts for many years and has won well-deserved trust for its reliability.

The VAZ 2107 carburetor is a complex, high-precision device consisting of many components. The abundance of details is noticeable in any drawing. Its full description is difficult and is needed only by specialists.

The internal structure of the carburetor looks no less complex.

But, despite the many small details, the diagram and structure of the VAZ 2107 carburetor is not very difficult to understand if you name the most important parts and describe their functions:

• a float chamber into which gasoline is supplied in limited quantities;
• a float in the form of a barrel and a needle valve that blocks the access of gasoline;
• mixing chamber, or mixing chamber;
• dampers – throttle and air;
• channels and jets, both air and fuel;
• spray;
• diffusers, their operating principle is like nozzles jet engine– create an air flow configuration;
• accelerator pump;

Quantitative (calibration) data characterizing the VAZ 2107 carburetor are as follows:

All technical data are taken from the official manual. Full specifications are described by equations of higher mathematics and aerohydrodynamics.

What is the working principle of a carburetor?

Gasoline is first supplied to the float chamber, its volume is regulated by the float.

When it floats up, the needle valve operates and closes access to fuel. In this sense, the float chamber plays the role of a toilet, and the 2107 carburetor is no different from it in this parameter. Before being fed into it, the fuel is filtered again by passing through a mesh.

Then the float chamber, like a donor, sends gasoline into two chambers (first and second). Fuel passes through two main fuel jets. The chambers also receive purified air filter air that can be preheated. The picture shows the hole diagram.

At the same time, air is supplied through air jets, which is mixed with gasoline in special emulsion wells and tubes. As a result, an emulsion is formed, that is, a mixture of air and gasoline. The picture shows a float chamber (with a screwdriver in it) and jets.

Before entering the atomizer, the fuel mixture passes through an eco-stat. At maximum power development, the fuel and air emulsion is further enriched.

The mixture then passes through special atomizers into diffusers, which prepare the final mixture by “tearing off” droplets of fuel and drawing them into a high-speed air stream, delivering the mixture precisely to the center of the mixing chamber. This is their job. The figure shows diffusers of chambers 1 and 2.

The throttle valve, controlled by the gas pedal, supplies the finished high-quality mixture directly to the cylinders.

There is a system of “idle” jets, in which fuel is taken only from the first chamber. The operation scheme of the cameras provides for the inclusion of the second camera when the unit is well warmed up full power. The operation of the second camera is fully demonstrated when overtaking at high speed.

Effective operation of the carburetor depends on the cleanliness of the jets, the cleanliness of all working surfaces, the smoothness and evenness of all drives and rods. In this sense, the 2107 carburetor is not as picky and capricious as modern imported analogues; it works even on low-quality gasoline.

The functional purpose of the carburetor in general, and the Ozone model installed on the VAZ seventh model in particular, is to prepare a combustible mixture (air plus automobile fuel) and dose it into the combustion chamber of the power unit cylinders. Regulating the amount of automobile fuel injected into the air flow is a fairly important function that determines the optimal operating modes of the automobile engine and its long overhaul and operational periods.

Ozone carburetor design

The Ozone carburetor, the design of which will be discussed below, is a factory option for equipping cars of the Volzhsky Automobile Plant of the seventh model. The design basis for this carburetor model, created in 1979, was the “Weber” product developed by Italian automakers. However, in comparison, Ozone has significantly improved such important performance indicators as efficiency and minimizing the level of toxic gases emitted into the atmosphere.

The first generation Ozone carburetors (1979-1981) were equipped with a mechanical damper drive, which was later replaced with a pneumatic one.

So, the Ozone emulsion carburetor is a two-chamber product characterized by the following design features:

The structural elements of the Ozone carburetor are enclosed in a massive metal body, distinguished increased level strength, allowing to minimize the effects of deformation, temperature fluctuations and mechanical damage.

The solid diameter of the fuel jets ensures stable operation of the product even when using low-quality fuel and under difficult operating conditions. One of the main design flaws of the Ozone carburetor is the absence of an economizer for power modes, which causes low dynamic characteristics and low efficiency.

Operating principle of Ozone carburetors

The principle of operation of the carburetor produced by the Dimitrovgrad Automobile Unit Plant (DAAZ) can be described by the following provisions:

Video - Do-it-yourself adjustment of the Ozone carburetor

Work on adjusting the Ozone carburetor is carried out not only when it (the carburetor) is not operating correctly, but also in the event of repairs that involve replacing some elements of this unit. Let us consider in more detail the list of settings that are a mandatory continuation of repair and restoration work.

Replacing the rod with the diaphragm or the valve (throttle) drive of the second chamber requires adjustment of the pneumatic drive.

After replacing the elements of the starting device, it is configured.

Reasons for setting the idle system along with malfunctions power unit is to prepare the car for technical inspection.

Replacing a float or needle valve requires adjusting the fuel level in the chamber (float chamber).

Owners of Classic cars often encounter problems with dynamics and fuel consumption. Drivers call a car engine a heart, and a carburetor can easily be compared to a heart valve. It is the last part that determines and the dynamic characteristics depend on its correct adjustment. In this article we will learn about how the carburetor works (VAZ 2107 DAAZ). We will also look at how to regulate it correctly.

Basic design of DAAZ parts for classic VAZ models

The operation of any automobile internal combustion engine directly depends on the quality and quantity of the mixture of fuel and air. This very mixture is prepared directly by the carburetor. In addition, this device evenly distributes the mixture throughout the combustion chambers.

The carburetor (VAZ 2107 DAAZ) consists of several main parts. This is a diffuser, as well as a jet and a float chamber.

Device types

If the car has an old engine, then such cars are equipped with DAAZ 2107 - 1107010 carburetors. With new engines and a vacuum corrector, a new model or modification is used. This is the DAAZ 2107 1107010-20 model.

These products are produced at the Dmitrovgrad Automotive Units Plant. This company has been producing various equipment for classic VAZ models for many years. DAAZ 2107 (carburetor) has earned special trust among drivers as being quite reliable.

Complex and high-precision device

A carburetor is a complex device consisting of many different components. But the complete device is necessary only for those who professionally configure and adjust these devices.

However, despite all the difficulties and a large number of details, let’s take a closer look at how this device works.

So, what kind of device does the DAAZ 2107 1107010 carburetor have? This device consists of a float chamber into which fuel flows in limited quantities. The access to gasoline is closed by a needle valve, as well as a float, which in appearance resembles a barrel. Gasoline is mixed in a special mixing chamber. The carburetor also consists of a throttle valve as well as an air valve. In addition to them, the device also includes jets. The fuel is atomized through a sprayer. One of the important components of a carburetor is diffusers. They work like nozzles and create an air flow configuration.

DAAZ 2107 carburetor: operating principle

When fuel enters the float chamber, the volume of fuel is regulated by the float. If it floats up, the needle mechanism will block the access of gasoline to the chamber. So, the camera in this case resembles a toilet cistern. Everything is the same here. But fuel is not supplied immediately. First it will go through a special filter to clean it.

In addition to gasoline, air is supplied to the chambers through air jets, which has previously been cleaned in air filters. The air then forms a mixture with gasoline using special tubes and wells. Thus, a so-called emulsion is obtained.

But that is not all. Before entering the combustion chambers through a spray, the mixture passes through an econostat. Here the mixture undergoes additional enrichment.

Next, using sprayers, the mixture enters the diffusers. This is where the final preparation of the mixture takes place. The carburetor of the VAZ 2107 (DAAZ produced by DAAZ) is designed in such a way that fuel droplets in the diffusers are drawn into a high-speed air flow. Thus, the air-fuel mixture enters the center of the mixing chamber.

The gas pedal on VAZ cars regulates the position of the throttle valve, which is designed to supply the mixture directly to the engine cylinders.

What else is special about the DAAZ 2107 carburetor? Its design includes idle jets. In this mode, the mixture is taken only from the first fuel chamber. The principle and scheme of operation of the fuel chambers activates the second chamber only when the engine reaches operating temperatures. Camera II also turns on if you need to quickly gain momentum and high speed.

Differences in modifications

As you know, the latest models of VAZ 2107 and other versions are equipped with a new carburetor DAAZ 2107 1107010 20. Let's see what the difference is between this modification and the old carburetor 1107010.

According to information received from AvtoVAZ specialists, these two modifications are based on the same model. Here the fundamental difference between them is the economizer for forced idling. Model 1107010 has EPHH, and the new modification is not equipped with this unit.

Although the DAAZ 2107 20 carburetor was not equipped with an economizer, it is equipped with a special nozzle for supplying fuel. The difference is that here it is regulated by means of an electromagnetic system. So, if the ignition is turned off, the fuel supply is cut off.

Carburetor DAAZ 2107 1107010 - adjustment

Before proceeding with the adjustment, you need to find out which of the two modifications is installed in your car. So, if the car is equipped with a vacuum ignition corrector, then the internal combustion engine of the car is the latest model of VAZ 2103 or 2106 engines, and the carburetor modification is new. If you haven’t found a vacuum corrector, then you have a DAAZ 2107 1107010 carburetor.

Basic faults

In order to make adjustments, you need to know several typical faults. Since this unit is responsible for dynamic characteristics, breakdowns include:

• Problems starting the engine, engine sneezing.
• Jerks, jerking, frequent failures on the accelerator pedal.
• Lack of overclocking options.
• Increased fuel consumption.

So, if while operating your car you were able to detect one or more faults from this list, then the part needs repair.

You need to know that the maximum adjustment of the DAAZ 2107 1107010 carburetor is possible only with the unit removed. The process does not involve cleaning this device with lint or woolen rags. You also won’t need any wires to clean the jets.

When making adjustments yourself, you must first remove the cover from the assembly. Then you can proceed to adjusting the float chamber. It's comfortable.

Adjusting the float chamber

The float has free movement. The stroke size should be between 6.5 mm on one side and 14 mm on the other side. The stroke is adjusted using a special template.

If your chamber has a smaller distance, you will need to bend the needle valve tongue slightly.

Now you can adjust the operation of the needle valve. When the float rises, less fuel flows. If the throttle valve opens, fuel flow is higher and the float moves down. To adjust the float on the other side, you need to move the float back as far as possible and use the same template to check this parameter. If the distance is not 14 mm, then the fastening stop should be bent.

Setting up the launcher

Adjustment includes the process of adjusting the starting device. For older devices, it operates at a frequency of 1500 rpm. If you examine the DAAZ 2107 (carburetor for the “seven”) from the other side, you can see a special channel. If you remove the assembly and inspect it from behind, you can see the air supply channel.

To adjust, you first need to remove it. Then you need to turn the lever so that the air damper is completely closed. Next, you should turn the device over, and then measure the gaps between the damper and the wall. For our carburetor, the gap should be 0.85 mm. To adjust the gap to the required size, it is necessary to bend the drive rod.

Next you need to adjust the gap A. You can find it between the wall of the channel and the edge of the damper below. So, you need to close the damper and recess the starter rod. As a result, it will open, and the gap should be from 5 to 5.4 mm. To adjust, you need to turn the adjusting screw with a screwdriver.

Setting up idle speed

First, you should make sure that the engine must be at operating temperatures. To adjust, you need to rotate the adjusting screw for the fuel mixture qualities until they become maximum.

Now it’s worth turning the quality screw to add a little more speed.

The point of these operations is to ensure that the quality of the mixture is minimal, and the idle speed is from 850 to 900. These are the most optimal values ​​for cars of the “Classics” family. You should not make revolutions more or less than this value, as they will be considered unstable and will entail increased wear of the crankshaft parts.

We looked at several possible adjustment methods that you can do yourself. But if you are not confident in your actions, it is better to entrust your DAAZ 2107 (carburetor from the “seven”) to a specialist who is well versed in them.

The power supply system of the VAZ 2107 is practically no different from all rear-wheel drive VAZ cars. The only exception is the carburetor, which has been redesigned and supplemented with new, more advanced systems, which we will talk about today. In fact, it remained the same Weber developed in 1967 that was installed on the Fiat 124.

Carburetor VAZ 2107 and device diagram

Before we talk about changes in the design, let's get acquainted with the design of the carburetor. We have shown its diagram in the photo, you can understand it if you wish, but detailed and detailed description The device and operating principle are of interest only to specialists, so we will focus only on the basic concepts related to the carburetor.

Standard carburetor VAZ 2107 type Ozone emulsion type with a falling flow of the fuel-air mixture. The design has two chambers - primary and secondary. At low speeds, the carburetor uses only the primary chamber, which is equipped with a number of systems whose operation is aimed at stabilizing engine operation and optimal fuel supply. The main carburetor systems "Ozone" can be called:

Now let's briefly look at the operating features of each of the presented systems in order to understand how the device works in general.

The main working element of this device is the air damper, which regulates the air supply to the carburetor. The damper is located only on the primary chamber and is driven by a cable and is mechanically controlled from inside the car. The choke is the starting device.

What is it for? When starting the engine, the carburetor cannot always provide the required proportion of air and gasoline to start. This is due to many factors, but in order not to ramble on for too long, we will give a simple example. In the cold season, fuel volatility decreases significantly, and when starting the engine requires an increased content of gasoline in the mixture, the so-called. rich mixture. By closing the choke handle, we increase the amount of gasoline in the mixture and enrich the mixture.

In order not to overfill the spark plugs with an excessive amount of mixture, the air damper is connected to the throttle and opens it by 0.7 mm. This gap is called the starting gap. As soon as the engine begins to “pick up”, a vacuum is created, which through throttle valve transmitted to the air. This is done through a vacuum diaphragm; the degree of opening of the damper can be adjusted with a corresponding screw.

CXX ensures normal engine operation when the throttle valve is closed, when we do not touch the gas pedal. This is a rather complex system, and in order not to turn our review into a scientific dissertation, we will only say that at idle the engine receives power completely autonomously. That is, it is a carburetor within a carburetor. The CXX takes fuel directly from the float chamber and mixes it with air in an emulsion tube, or well.

The entire setting of the CXX comes down to adjustment with three screws

• mixture quality screw, which is responsible for the proportion of air and gasoline at idle; when screwing it in, we make the mixture poorer, and when unscrewing it, we make it richer;
• the mixture quantity screw affects the idle speed and regulates only the amount of mixture entering the combustion chamber at idle;
• The throttle valve thrust screw balances this process.

Econostat

The econostat, despite its name, has nothing to do with saving, rather the opposite. It serves to ensure that the engine does not lack fuel at high speeds and that the fuel/air ratio corresponds to the speed. To do this, he takes additional gasoline directly from the float chamber, bypassing all systems, and sends it to the firebox. Thus, it enriches the mixture at high speeds and increased engine loads.

This device is needed to ensure that failures do not appear in the engine during a sudden change in operating mode. Simply, when you sharply press the gas, trying to impress the world rally champion, the engine is not always ready for such a turn of events, and for a sharp transition to high speed mode it simply does not have enough fuel, your seven will stall, and you will be ridiculed, humiliated and offended.

To prevent this from happening, the accelerator pump comes into operation, which, using a nozzle, adds a portion of fuel to the nominal one, and the engine copes with the sudden transition to high revs. In short, yes.

These are the main systems of the OZONE carburetor, which is installed on all VAZ 2107 cars. There are some changes in the design that were made during the production of the car, but they are not global in nature. The device is quite reliable and is subject to various adjustments and settings, so it is still popular and car enthusiasts are in no hurry to change Ozone to a more modern models carburetors. Take your time and treat the carburetor carefully, then it will work for many more decades. Don't save gas, and good luck on the roads!

For correct operation of the engine in any mode, it is necessary correct adjustment VAZ 2107 carburetor. The device is not the simplest, but even a non-specialist can set it up if you know the operating principle of the systems and the algorithm of actions. The VAZ 2107, like any carburetor car, is sensitive to fuel quality, so from time to time the carburetor requires adjustment of the channel capacity and clearances.

The latest model of the DAAZ 2107-1107010 carburetor, which is produced by the Dimitrovgrad Automotive Unit Plant, differs from the modifications 2107-1107010-10 and 2107-1107010-20 more fully equipped- it is equipped with a vacuum corrector fitting, an automatic vacuum drive for the secondary chamber damper; in some models, jets of the main dosing system with other throughput ratings can be installed. However, this does not affect the progress of the basic setup and adjustment processes.

Preparing the carburetor for adjustment

VAZ 2107 - in the photo - the car is carburetor and is sensitive to fuel quality, therefore sometimes it needs to correct the capacity of channels and gaps

If the engine starts and runs stably at any speed and under any load, fine adjustment is unlikely to be needed. As a rule, this must be done in cases where the engine's fuel consumption exceeds the nominal values, when the engine is difficult to start, and dips appear in transient operating modes during sudden acceleration. Absence or instability idle speed can also be treated by adjusting or cleaning the canals and cavities.

Sometimes there are situations and clear symptoms that it is necessary to adjust the ignition timing or adjust the valves of the VAZ 2107, but the carburetor may be quite serviceable. Therefore, it is worth adjusting it only when there is confidence in the serviceability of the ignition system, the accuracy of setting the thermal clearances of the valves, after checking the functionality of the fuel pump, and good compression in each of the cylinders.

Adjustment may not bring results if the carburetor is clogged or has obvious mechanical problems or leaks. Therefore, a thorough inspection and assessment of the external condition of the device is necessary. Adjustment and configuration begin only when all these conditions are met.

Checking and adjusting the float chamber

Before checking and adjusting the carburetor on the VAZ 2107, you must remove the air filter along with the housing. And at the same time, check its condition, since a clogged dust filter greatly restricts air access to the engine, and this can also affect both the proportions of the working mixture and the operation of carburetor peripheral systems. Once the filter and housing are removed, unscrew the carburetor cap and gain access to most of the jets, the float chamber and the primary and secondary chamber diffusers. To begin, unscrew the plug of the filter mesh at the bottom of the lid near the fuel supply fitting. The mesh is carefully cleaned, washed, the internal cavity of the screw plug is washed, and the condition of the aluminum or bronze sealing gasket is checked.

When cleaning the internal cavities of the carburetor, you must adhere to important rules. Firstly, it is extremely undesirable to clean with fluffy or hard rags, since the fluff can easily clog the channels and jets. Secondly, when mechanically cleaning channels and jets, you should never use metal objects. They can irreversibly disrupt the throughput of the calibrated holes, then it will not be possible to correctly adjust the VAZ 2107 carburetor. Jets are cleaned only with wood chips, and ideally with compressed air or special liquids for the cleaning. The cone valve and its seat are cleaned using the same method.

Before adjusting the fuel level in the carburetor, you need to make sure that the float is intact, has no mechanical damage and does not leak gasoline or sink in it. Otherwise, the brass float is replaced. The float is adjusted by changing the angle of the thrust tabs. The factory recommends maintaining the following clearances - with the needle valve closed, the distance from the float body to the carburetor cover gasket should be 6.5 mm. In this case, the maximum free play of the float body should be no more than 8 mm, and the distance to the gasket in the extreme position should be within 14-14.5 mm. These values ​​are achieved by bending the persistent tabs. Check the operation of the float and cone valve by supplying gasoline with the cap installed, followed by monitoring the fuel level in the chamber.

Setting up and checking the launch system

This system is used to start a cold engine and ensures its warming up by approximately 1.5-2.5 thousand revolutions. When the engine warms up, the system is turned off manually and the engine starts idling at a speed of about 800-900 rpm.

Maintenance and adjustment of the starting system comes down to cleaning the vacuum supply channel in the central part of the carburetor, checking the gaps and stroke of the air damper, checking the functionality of the vacuum reverse drive of the air damper, and the starting clearances of the primary chamber damper. With the air damper closed, the lever system should slightly open the fuel damper by 0.8-0.9 mm.

Second important gap- between the air damper and the wall of the primary chamber. When the damper is closed, this gap should be about 5-5.5 mm. It is adjusted by a screw, which is located under the brass threaded plug on the body of the vacuum air damper position regulator. The functionality of the starting system is checked with the air filter installed and the engine cold.

Idle adjustment

Adjustment of the idle speed of the DAAZ 2107-1107010 carburetor is carried out only when the ignition system is adjusted and operational, and the thermal clearance of the valves corresponds to the norm. You also need to pay attention to the absence of air leaks in the intake tract - in the manifold, under the carburetor, and monitor the tightness of the connections between the parts of the carburetor. Besides, special attention requires an idle speed solenoid valve and a jet mounted on the valve stem.

Solenoid valve installed on the carburetor body, it is powered by 12 V, its positive wire is connected to it, and the minus is the ground on the valve body. If there is a suspicion about the condition of the nozzle and the functionality of the valve, this can be checked quite simply. The valve is unscrewed with a 13mm wrench, the power wire is disconnected, and the valve is removed from the carburetor body. The nozzle itself is washed and, if necessary, blown out with compressed air. The solenoid valve is checked as follows: take a wire, connect the voltage from the positive terminal of the battery to the power terminal, install the valve body on the negative terminal of the battery. When voltage is applied to positive terminal The valve stem should retract into the body. If this does not happen, the valve is changed.

Adjustment of the carburetor idle system is carried out only on a fully warmed-up engine. Two screws are involved in the process - a screw with a large head is responsible for the amount of mixture, and an adjusting screw of a smaller diameter regulates the proportions of mixing air and fuel in idle mode.

The engine is started and the number of revolutions is monitored in this mode. The tachometer should show 800-900 rpm. Begin adjustment by searching for the most stable speed, turning the mixture quality screw. As soon as it was possible to adjust the carburetor to a speed within 900-1000 rpm, the VAZ 2107 engine runs stably and smoothly, without failures, the number of revolutions is adjusted to normal using the mixture quantity screw. After this, it is worth looking for the optimal position of the quality screw to achieve maximum stable speeds and repeat the adjustment with the quantity screw to set the nominal number of revolutions.

During adjustment, you need to pay attention to the damper stop screw, since a correctly adjusted screw does not allow the damper to come into close contact with the walls of the primary chamber. In the position when the primary chamber valve is completely closed, the tongue of the throttle axis should rest against the stop screw. This is necessary so that the damper does not break the walls of the primary chamber in the closed position. A tuned, warm carburetor should keep the idle stable and even, and when the pedal speed increases, the transition from idle should not be accompanied by dips and jerks.

Correctly adjusting the VAZ 2107 carburetor with your own hands will allow you to get rid of unstable work engine and will save not only fuel, but time and nerves, especially in the cold season.

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Carburetor 2107-1107010-20 emulsion type, with falling flow. The throttle valve of the first mixing chamber is opened from the carburetor control pedal inside the car, the valve of the second chamber is opened automatically from a pneumatic drive. The carburetor has a balanced float chamber, two main metering systems, a diaphragm starting device, an economizer (econostat) with a pneumatic drive, a diaphragm accelerator pump with a mechanical drive, a second chamber transition system, an idle system with an electromagnetic shut-off valve, and a spool valve for suction of crankcase gases.

The main metering system of the first chamber includes a main fuel jet 11, an emulsion well with an emulsion tube 13, a main air jet 3, a small diffuser 18 with a spray nozzle 19 of the main metering system and ensures engine operation over a wide range. When you press the carburetor control pedal, the throttle valve of the first chamber opens, the vacuum in the atomizer increases, the fuel in the emulsion well rises and, upon reaching the upper row of holes in the emulsion tube 13, is captured by air coming from the emulsion tube through the main air jet 3, and passes through the atomizer and diffuser .

The main dosing system of the second mixing chamber, unlike the first, operates when the throttle valve of the second chamber is opened by a pneumatic drive. The upper cavity 12 of the diaphragm mechanism is connected by air channels 10 to the narrow part of the large diffusers of the first and second mixing chambers through jets 1 and 5 of the pneumatic drive. As the vacuum increases in large diffusers and, consequently, in the pneumatic drive jets, the diaphragm, overcoming the force of the spring, moves rod 8 upward, acts on lever 6 and opens the throttle valve of the second chamber. At this moment, the main dosing system of the second chamber comes into operation. The fuel through the main fuel jet, the emulsion well, then with air from the main air jet of the second chamber enters the atomizer and the second mixing chamber.

The pneumatic drive more smoothly turns on the main metering system of the second chamber and makes it unnecessary to strongly enrich the combustible mixture compared to carburetors with sequential opening of the throttle valves, which leads to a decrease in exhaust gas toxicity. The pneumatic drive of the throttle valve of the second chamber automatically adjusts the position of the valve from speed limit engine operation. With the throttle valve of the first chamber fully open and the engine load increasing, the rotation speed crankshaft, and consequently, the vacuum in the mixing chambers decreases, the damper of the second chamber closes. The main air flow will pass through the first mixing chamber, improving fuel atomization.

When the control pedal is suddenly released, the throttle valve of the first chamber closes and the lever forcibly closes the throttle valve of the second chamber, preventing an increase in the engine crankshaft speed.

The possibility of self-oscillation of the pneumatic drive mechanism is eliminated by connecting the cavity above the diaphragm with the diffusers of both the second and first chambers.

In idle mode, throttle valve 2 of the first mixing chamber is closed; in this case, the transition holes 3 of the idle system are located above the upper edge of the damper. The air damper is fully open. The vacuum from under the throttle valve 2 is transmitted through hole 4 to the fuel nozzle of the idle system. Under the influence of vacuum, the fuel entering the emulsion well 14 rises to the idle fuel nozzle, is partially mixed with air entering through the air nozzle 11 of the idle system, mixed again with the air entering through holes 3, and then through hole 4, adjusted by a screw 6 quantities of the mixture enters under the throttle valve into the intake pipe. The fuel level in the emulsion well decreases and becomes less than the fuel level in the float chamber. The difference in levels creates a pressure, under the influence of which in this case fuel flows from the main fuel nozzle. The vacuum in the small diffuser at the nozzle of the main metering system at idle is insignificant, and fuel does not flow through the nozzle.

When the ignition is turned off, power is removed from the solenoid shut-off valve, the idle jet hole is closed by the shut-off needle, and the path through which fuel can flow at idle is closed. This ensures that the engine cannot operate spontaneously.

To regulate the crankshaft rotation speed at idle, the carburetor has an adjusting screw 6 for the quantity of the mixture and an adjusting screw 7 for the quality (composition) of the mixture. Due to current toxicity standards limiting the maximum permissible carbon monoxide (CO) content at idle, engine speed control must be performed at stations Maintenance vehicles in strict accordance with the factory instructions.

In throttling modes, it is mainly the first mixing chamber that operates, which ensures the carburetor operates over a wide range. The required composition is ensured by the joint work of the main dosing system and the idle system. As the throttle valve of the first chamber opens, the vias 3 come under the influence of vacuum and stop working as air holes. The fuel-air emulsion begins to flow through them. When the throttle valve is further opened, the vacuum in the atomizer increases, the fuel in the emulsion well begins to rise, and when it reaches the top row of the emulsion tube opening, it is captured by air entering the emulsion tube through the main air jet of the main metering system and is drawn into the atomizer. From this moment, the joint operation of the idle system and the main dosing system begins.

When the throttle valves are fully opened, fuel flows intensively from the nozzles of the 19 main metering systems. Due to the presence of air jets 3, which have large flow sections, as well as large flow sections of the channels of the nozzles 19 and the channels connecting the nozzles with the emulsion wells 12, the vacuum in the wells still remains less than the vacuum at the outlet openings of the idle system and the transition system. Therefore, the idle system and the transition system operate as fuel systems and the mixture does not become lean, but the amount of fuel entering the engine through these systems in these modes is insignificant.

The second mixing chamber operates similarly to the first, with the exception of the transition system, which begins to work only from the moment the throttle valve of the second chamber begins to open, since the outlet openings of the system are located above the upper edge of the throttle valve when it is in the closed position, and the vacuum in them in this case is not transmitted.

When the engine is fully loaded at modes close to maximum, the ecostat additionally operates, which enriches the fuel mixture. Due to the significant vacuum in the small diffuser of the second chamber, the fuel comes from the float chamber through the fuel nozzle 5, is mixed with air from the nozzle 4 in the form of a fuel-air emulsion, through the emulsion nozzle 1 enters the econostat atomizer and then into the carburetor mixing chamber.

In acceleration mode, the accelerator pump serves to enrich the mixture, which injects additional fuel into the air flow passing through the carburetor. Fuel enters the working cavity from the float chamber through the inlet ball valve 11 and the bypass jet 4. When the throttle valve is sharply opened, the cam 6 of the accelerator pump drive rotates and acts on the lever 7, which compresses the spring placed inside the telescopic cup 9 of the working diaphragm 10. The spring smoothly moves the diaphragm, providing prolonged fuel injection. When the pump diaphragm moves, fuel is injected through channel 3 and then through the injection valve and nozzle 2 into the first mixing chamber of the carburetor. Cam 6 has a special profile, which ensures double fuel injection.

To reliably start a cold engine, a strong enrichment of the combustible mixture is necessary due to the low quality of mixture formation caused by low temperatures engine parts, fuel and air and low air speeds passing through the carburetor.

Enrichment of the mixture is ensured by a starting device that operates as follows. When starting the engine, the starter control handle must be pulled out all the way. The throttle control pedal must not be touched in order to avoid supplying the engine with an uncontrolled excess amount of fuel. Under the influence of the thrust, the three-arm lever 1 rotates counterclockwise, the telescopic rod 9 closes the air damper 2 through the lever. The end of the rod 4, moving in the slot of the rod 5 of the diaphragm 6 of the starting device, occupies the extreme left position, and the rod 19, going down, turns the lever 14 , which acts on lever 11 and slightly opens the throttle valve of the first chamber to the required angle.

When the engine crankshaft is cranked by the starter, the resulting vacuum is transmitted to the openings of the idle system and through the slightly open throttle valve to the nozzle of the main metering system. Under the influence of this vacuum, fuel begins to rapidly flow out of the openings of the idle system and the nozzle. At the same time, the vacuum is transmitted through the channel into the working cavity 8 of the diaphragm 6, but it is not yet able to overcome the resistance of the return spring, and the diaphragm remains motionless. When persistent flashes appear in the intake pipe, the vacuum increases, under the influence of which the diaphragm with rod 5 are retracted and, with the help of rod 4 and the air damper lever, the latter is slightly opened. The air damper lever has the ability to rotate in the direction of closing it due to the compression of the spring in the telescopic rod 9. The extreme retracted position of the diaphragm 6 is determined by the adjusting screw 7.

All elements of the starting device are selected in such a way that the air damper opens and closes automatically when starting and warming up the engine, preventing excessive enrichment or depletion of the combustible mixture. As the engine warms up, the air damper is fully opened, gradually returning the starter control handle to its original position.

The carburetor starting device ensures the successful start of a serviceable and correctly adjusted engine without any preliminary preparation at temperatures down to minus 25°C.