Uncomplicated devices to facilitate life that, with certain skills, it is easy to do at home. Methodology RXX Operation Principle Homemade Stand for idle regulator

The idling regulator is designed to stabilize the revolutions created by the engine. There is a logical question about whether the presence of this device is so important and necessary? And can also be able to do without it and how to repair the repair in the event of a malfunction. All the operation of the car depends on this device.

In order to understand what work processes is influenced by the idling regulator and why it is necessary to regulate its work, it is necessary to have the concept of what the principles of its work.

Principle of operation

It is very important that fuel and air were in certain ratios. Since with the deviations of one or another indicator, the combustion process will not be perfect or there will be no absent. The main task of the idle regulator is the adjustment of the supply of air at the time of finding in idle mode. The feed occurs not through the throttle, as it opens at the moment of exposure to the gas pedal.

The idling regulator consists of a stepper electric motor, as well as a spring-loaded cone needle. In order to adjust the amount of air during the operation of the car at idle, it is necessary to change the section in the passage channel using the regulator. Simultaneously with the RXX, the work of a special sensor occurs, which makes accounting for the amount of air. In turn, the controller serves fuel.

Probably, most people who are not dedicated to the subtleties of the car, when mentioning the phrase "idling" think that this is the easiest and easiest mode of the car, but this is not so. This mode is for the engine most tedious, since it is very difficult to work with small revs. And it has its own reasons:

The reason for the above processes is the small feed rate of the fuel enriched with air in graduation system. As a result, the mixing reaction occurs on insufficient level And significantly reduces the level of efficiency. Of course, when proper adjustment RHX will work for a very long time, but often faults in the operation of this device are not rare. Most often, bad wiring is to blame. The installation of the RHX mechanical sample has deserved quite popular.

Attention! Thanks to the mechanical RRH, you can achieve a significant reduction in toxicity. exhaust gases.

The most common idle malfunctions

To the possible appearance of malfunctions associated with the operation of the idle regulator, it is necessary to treat with complete seriousness, as they can lead to terrible and not desirable consequences. There are a number of specific features that indicate that there are malfunctions of a idle sensor. These include:

You need to know how you can check the serviceability of the idle sensor, since some signs of breakage may indicate a malfunction of other parts of the car.

Causes of problems

There are many reasons that could lead to this malfunction. You should not lose much time on guesses, but you need to eliminate the malfunction as soon as possible. After all, the long-term operation of the car can lead to more serious problems with the engine. Allocate two, most common, causes of malfunctions:

• wearing a guide needle;
• cut contacts in the middle of the sensor housing.

Checking the health of the regulator

Before starting the process of checking the idle regulator, it is necessary to ensure that the vehicle is installed, that is, tighten the handbrake and put under the wheels of the shoe. Consider the simplest and affordable ways of diagnosing.

The device is covered from the overall electrical chain and voltage checks with a voltmeter. When the ignition is turned on, the resulting voltage should not exceed the standard limits, that is, 20 volts. If the voltage is much lower - a malfunction with the charging of the battery, if any - it is worth checking the entire chain.

Check the resistance level. It should not exceed 53 Ohm.

Attention! If the work of the idle regulator is perfect, the voltage indicator will be very high.

If you turn on the ignition and attach a power block to the idling regulator, the sensor needle must change its position if not, then this indicates a malfunction.

It is possible that the main fault is located in the work of the RXX. With certain skills and knowledge, it is possible to replace the defective idle regulator yourself, without the help of car service workers.

Replacing the regulator

In order to adjust the idling regulator in carburetor-type vehicles, there are special screws that allow you to replace manually. But there will be additional devices such as a tachometer and gas analyzer. In general, the process of replacing the idling regulator on these vehicles is characterized by a certain complexity.

But on vehicles A new sample this procedure can be made much easier and faster. True, it will be necessary to steadily follow some advice and recommendations:

There is one small but important nuance that concerns the repair of the idle regulator. It simply not provided. Some malfunctions can be eliminated by surface processing with special chemicals. For example, WD-40 or a carburetor cleaning agent.

Important! All cleaning procedures must be made as accurately as possible so as not to damage the device.

Acquisition of the regulator

The unit, in which the needle vibration does not feel, is not subject to repair. In this case, so as not to spend time on meaningless resuscitation effort, you just need to get rid of it. To purchase a new sensor, you do not need to spend huge money.

Tip! Most. optimal option Regarding the price and quality are sensors of domestic production.

In specialized stores, sellers consultants will help determine the selection of the sensor. If there are doubts about a new type of device, then it is best to bring the old sensor as a sample and to purchase exactly such a model.

It is very important to buy an original device, and not a cheap fake. It is worth paying attention to all the inscriptions and holograms on the package. If there are errors in writing words or other suspicious moments, it is better to visit another store and choose a device that does not cause doubt.

Purchase is best done in proven places. For large guarantees, you can check the availability of quality certificates for the specified unit. Also do not forget about the check. It must always be taken, because it is your guarantee.

In the case when the vehicle is noticed in idle mode, disorders are not characteristic of the engine, such as a sharp change of revolutions, it is necessary to diagnose in order to identify the cause of these violations of work. If you do not detect and not eliminate the problem on time, then the situation can be aggravated. Do not hope for a shortage of time for repair work, because it does not take it a lot.

The replacement of the idle sensor is shown on the example of the car VAZ 21103:

Ministry of Agriculture of the Russian Federation

FGOU VPO "Eagle Gau"

Faculty of Agriculture and Energy Support

Department of "EMTP and Tractors"

Josan A.A. Golovin S.I.

Principle of operation, diagnostics and testing of the idle regulator

Methodical instructions for laboratory work

by discipline " Technical exploitation Machines "and" Electronics on tractors and cars "

for students specialties: 110301 - "Mechanization of rural

guide ", 110304 -" Technology of maintenance and repair of cars in APK "

Methodical instructions are developed at the Department of "EMTP and Tractors" to. T. N., Associate Professor A.A. Josan and Art. Teacher S.I. Golovin.

Methodical Commission of the Faculty of Agrotechnics and Energy Support

protocol number ___ from "___" _______2007

Methodical Council Orelgaau, Protocol No. ___ from "___"

Reviewers: k. T. N., Associate Professor of the Department "Reliability and Repair of Machines" Orelgaau A.L. Semers;

to. t. N., Associate Professor of the Department of Sirm OrelGTU M.P. Stratulat.

Introduction ..................................................................................... .. ... .. 4

1 General…………………………………………………………... 6

1.1 Appointment of RXH ............................................................... ... 6

1.2 Types of RXX used on VAZ cars ......... ........................ 7

2.1 General information .................................................................. 12

2.2 Methods of management. ....................................................................... ... 16

2.3 Principle of operation of the stepper engine RXH VAZ ........................ ... 18

3.3 Development of the functional scheme of the Tester RXH ......................... 24.

3.4 Selecting an element base. Calculation of the main nodes of the tester ............... 25

3.5 Development concept Tester RXH ......................... 28.

3.6 Methods for conducting PCH tests on the stand ........................ 33

Introduction

Inlet system of modern gasoline engines consists of several elements, the most difficult of which is throttle

node (Figure 1.1).

1 - coolant supply nozzle; 2 - Carter ventilation pipe at idle; 3 - Cooling

liquid; 4 - position sensor throttle valve; 5 - idle regulator; 6 - fitting for blowing an adsorber.

Figure 1.1 - throttle nozzle assembly.

The design of the throttle unit must meet multiple contradictory requirements. This is, first of all, the presence of a sufficient passage segment selected from the conditions for obtaining the maximum

pushable gas-dynamic losses at maximum air consumption engine. The fulfillment of this requirement leads to the fact that

sections sufficient for maximum costs

ha, the opening angle of the throttle valve providing max

symal filling at the minimum operating frequency of rotation

the lacented engine shaft is about 200. In terms of characteristics

car manageability rustic, it is unacceptable because it is not allowed

it takes the driver to confidently control the car in case of working

you are engine in the field of rotation crankshaftwhere ab-

salt values \u200b\u200bof air consumption relatively small. From here

the requirement for the linearity of the transfer characteristic of the throttle assembly, that is, the requirement to ensure the proportionality between

the accelerator pedals and the power developed by the engine,

changeable in the entire range of changes in the position of the throttle valve.

Ensure the acceptable linearity of the transfer characteristic of the throttle assembly help various kinds of nonlinear mechanical links, binding the accelerator pedal and the throttle of the engine

tel. But more promising is the use of electrically controlled actuators when fully or partially

supervising kinematic communication between the accelerator pedal and the throttle

salt damper. This solution allows not only to get the right transmission characteristicbinding the position of the accelera pedals

torah and throttle, but also apply more efficient ways to control the engine's workflow. The use of an electrically controlled throttle is currently limited due to its high costbut the use of a simpler actuator

road - adjustable air regulator, in particular idling regulator (RXX), is mandatory.

1 General

1.1 Purpose PCX

The idling regulator is used to maintain the installed speed of the engine at idle due to the change in the number of air

ha, supplied to the engine bypassing a closed throttle (ri-

sOCK 1.2). In a fully extended position (extended until

the position corresponds to "0" steps), the conical part of the stock overlaps

dual air in the circumference of the throttle. When opening (ho

the location increases) the valve provides air consumption,

fulmental movement of the rod (number of steps) from its seat.

The fully open position of the valve corresponds to the movement of the rod by 255 steps.

1 – stepper engine idling regulator; 2 - throttle nozzle; 3 - throttle; 4 - locking needle Valve RXX; five -

electrical connector; A - incoming air.

Figure 1.2 - PCX air adjustment circuit.

On a heated engine of the ECU, driving the movement of the rod,

holds the constant rotation frequency of the crankshaft at idle, regardless of the engine status and from the load change (including

electrical fan, air conditioning compressor, etc.).

In addition to controlling the rotational speed of the crankshaft in idle mode, the RXC is controlled, which contributes to the reduction

the toxicity of exhaust gases. When the throttle is sharply closed when braking by the engine, the RCH increases the amount of air supplied to the circumference of the throttle, providing dinner

the fuel and air mixture. This reduces hydrocarbon emissions and op-

cons of carbon, occurring during the rapid closing of the throttle.

1.2 Types of RCX used on VAZ cars

On domestic passenger cars: VAZ 2110, 21083, 21093, 21099 and their modifications with engines of VAZ-2111 and VAZ-2112 with a system of distributed fuel injection are installed by the RCH of two firms

products:

1. Kaluga plant of telegraph equipment (KZT) RXH 2112-1148300-02 (Figure 1.3)

2. Electromechanical plant of JSC Pegasus (Kostroma) RCH 2112-1148300-01 (Figure 1.4)

Figure 1.3 - RXX 2112-1148300-02

Figure 1.4 - RXX 2112-1148300-01

Figure 1.5 - dimensions RHX

Table 1 - Specifications and operating conditions

Yes, and let's say, in your inexperience, I can not understand how minus coming with the ECU in the company with a minus on the body shows the tension, that's what I wanted to know Eat on the engineered car everything becomes normal means a minus appears so to speak, the sore manifests exactly when started, tension On both legs equally. And even if we decided that there is no minus from the brains in the ignition mode and the launch that leads to the unwanted RHX, then where to check this minus from the brains or is it a Khan brain?

Approximately I start catching up it turns out that minus at all as such does not go from the ECU on the RHX, and sitting somewhere in the brain and adjusts the voltage that the tastefulness passes from the overload relay through the coil of the RCH, so on the second leg, the voltage value is less than at the entrance as it comes it Resistance?

The most common system withRHX (2-pin) . Machines since 87, usually equipped with a catalyst and electronic ignition system EZL

System input signals :
- motor,
-teral air flow (signal with a flow meter potentiometer),
- motor motor (TD signal from the ignition system),
- Covering the throttle (Micrik "DZ closed" in the sensor on the axis of the DZ)
- Signal from the speed sensor "Sign of Car Movement" (from 9/88 years)
Executive devices:
- idling regulator (hereinafter PCH), is an actuator that changes the amount of air passing into the throttle bypass to work at idle. The XX control in KE is produced by stabilizing air flow, rather than engine speed. In the controller's memory there is a table of air flow dependence on the engine temperature.

When mixing Micric "DZ closed", the control unit (BU) on the engine temperature calculates the air flow, which must be stabilized and driving the RCH, is trying to get such a consumption. ECU is trying to stabilize the XX only when the car is worth it, i.e. In the movement on neutral, there may be increased speed and only after a complete stop somewhere after a second they fall to the norm.
Those. If in the current mode of operation of the engine (on hot t \u003d 90grad.) Air flow 0.7V, then the brains through the RCH will begin to cover the flap (lower the revolutions), but not lower than 750, i.e. What comes before - or air flow will become 0.6V, let's say at 750 turns, or turns will fall to 750.

It should be understood that there is not the exact value of the stabilized air flow, but a certain range, also compensation in the presence of automatic transmission, air conditioner, etc. (devices that increase the load on the engine that requires compensation)
Over time, spraying on the potentiometer paths in the XX zone is abruptly, and with the same deviations of the shovel of the flow meter, the signal increases, i.e. If the new engine at 800 revolutions was 0.55V, then it can be 0.7V and higher to the old age, and therefore the turns are always minimal (i.e., the system rests on the lower limitation - turns 700) ...

Now Ob. emergency mode: It occurs when the air flow signal ceases to satisfy some kind of voltage range, then the system must stop adjusting the XX and turn off the RCH, but simply do it can not be done so. The engine will stall (who knows the RXH device - will understand), so the system increases the speed and de-energizes the regulator, without voltage there is always 2mm. emergency window, (When starting it is open for the whole, then the cover as the engine is heated). For the driver it looks like this: first the twentieth is normal, then suddenly the turns are smoothly rising to 1500 (emergency window in the regulator).
It can be simulated on a running engine simply disconnecting the connector with RXX
Check

Measure relative to the mass of both contacts when the RXC is connected (slightly lower the connector, but not to remove). Motor works on one will be around 12-14V. , on the other, approximately on 5V less. If on one of the contacts 12-14B is net, check the overload relay.

More details

1. Regarding the mass, (black probe on the engine) tweak in both contacts. on one of them will 12V. (The same darnot as online). And on the other about 5V. less. 2. Between your feet - 5V. On the xx heated motor.

Fault

1. no power - You will not see the voltage relative to the body or on one leg. Check the overload relay and before in it.

2. On both contacts 12V, or between the feet 0B (both situations are equivalent) - No control of the Rhh brain. For example, when the potential is removed on the Bosch ECU there will be such a situation. With the VDO ECU will not.

The overload relay gives the battery voltage to one of the findings of RXX. Even without the ECU, gives. Those. When the ignition is turned on, at least one contact must come . No plus - overload relay does not give plus (or wiring).

ECU "RUALE" RXH in minus (mass). If brains do not roll - plus will be on both conclusions of the RXH (there is no mass from the brain).