The value of the element of the exhaust gas recycling system for both ecology and for the Ford Transit engine. What is its meaning

Programmatically plugged EMP Ford Transit Connect 1.8 TDCI. Release car 2010. Diesel engine 1.8 liters, with a capacity of 110 hp The diagnostics has shown one error in the P0409 engine - exhaust recycling (EGR) - a malfunction of the electrical circuit.

Reading and editing firmware

For Ford Transit Connect 1.8 TDCI Installed engine control Siemens SID 206, read and write firmware through diagnostic connector CMD Flash licensed flashaker. The feature of the Siemens control blocks is the complexity of disabling errors in the USR and so that during diagnostics in the future there is no "zero" malfunction code P0000 or P167F.
We met cars with the disabled EGR and the "hanging" error P0000, while the machine was in emergency mode. Or another case, when the engine errors did not appear at all in any malfunctions.
Difficulty when editing Siemens files occurs due to lack of error masks location logic. To find the necessary, it is necessary to disassemble the firmware that we have done using Ida Pro. Only in this case it is possible to remove the errors and turn off the emergency mode of operation of the engine only when the USR is malfunction, while the P0000 and P167F will never appear. In addition, we closed the valve at the program level, although in the absence of nutrition, the USR is always closed with a return spring.

The result of the disconnection of the USR

Fix physically valve required, because Initially, it does not depend in the open position, which is due to a large amount of soot in the intake manifold or malfunction of the EGR mechanism (for example, the gears are checked). The engine came out emergency regime work, errors valve Erg. not. About the pros and cons of disconnecting valve EGR. You can read on our website.

The performance of the work took 1 hour.

Every year, automakers are becoming increasing attention to ecology issues. To improve this kind of systems, colossal money is spent.

Not an exception to the largest player of this market - the company Ford.. It actively invests millions of dollars in projects to reduce the harmful effect on the environment.

As a result of the introduction of hard standards in this direction, engineers were developed and implemented exhaust recycling system, or abbreviated EGR, for gasoline and diesel power units.

What is its meaning

It effectively neutralizes the destructive effect of nitrogen oxides, which helps reduce the level harmful emissions And accordingly increases the Eurostandard of the engine.

The principle of its action is reduced to the fact that in certain modes of operation of the motor, at idle and small revolutions, some of the exhaust gases comes from the exhaust manifold right into the inlet, high revolutions Their number is reduced by the activities of the special valve.

Thus, when mixing these gases with oxygen, the content of the latter is reduced. As a result, there is a decrease in the combustion temperature, which directly affects the reduction of toxicity.

According to experts, the working state of this system in diesel engine It leads to a reduction in the emission of soot microparticles by 10%, which, to some extent, affects the reduction of the growth of cancer.

Principle of operation of valve EGR on the example of Ford Transit

This model is very popular in the segment of commercial vehicles, where high annual runs are observed. In this regard, when buying, the choice falls on diesel modifications equipped with EGR system.

Its most important component is the valve, and the existing differences are reduced to the method of control. Thus, it can be electropneumatic, which corresponds to the standards of Euro-2 and Euro-3, as well as electronic - Euro-4 and Euro-5.

The main function of this device is the regulation of the number of applicants intake manifold Exhaust gases.

Painful choice: environmental safety or personal financial condition

Over time, from the quality of our fuel Ford Transit Valve Erg Slagey is clogged, which prevents its correct work.

The question arises about its replacement or plug. The first option is preferable, however, on the engine 2,5d, even the manufacturer itself admits the procedure for its neutralization.

It should be remembered that the faulty state of this component of the recycling system of exhaust gases is much worse on the environment, rather than its complete shutdown.

What is EGR?
EGR - exhaust gas recirculation system. From the name it is clear that with its work this system returns part of the exhaust gases from the exhaust in the intake manifold. The main task of the system is to reduce the exhaust toxicity in the warm-up modes and the sharp acceleration of the engine, which works on these modes on the enriched fuel mixes. In general, nothing complicated, but for some reason this system complicates the life of many engaged in the repair of cars so much.
First of all, consider the composition of the system:
1) The main part is the EGR valve. Provides gases from the exhaust to the intake manifold. Due to permanent contact with grilled gases - the least living part of the system. The main, it is the most important malfunction - leakage. IN different modifications EGR systems can be controlled as electrically (most of the GM cars) and pneumatically (the bulk of cars).
2) EGR solenoid. Used in valve pneumatic systems. The main fault is the same as for the valve - a leaky and at work of the engine affects the same way as as a result we also get an EGR open valve.
3) EGR valve valve stem position sensor / EGR valve discovery sensor. It happens that it breaks, but besides the tanned engine malfunction lamp, no unpleasant consequences are observed.
4) Engine control unit.
Different systems can have a different set of components, but the total is the EGR valve. Consider how its faults are affected by the engine. I already wrote that the main malfunction is leakage and it provides additional air seats in the intake manifold.
As a result, we have:
In engines with air flow meter (MAF-sensor) - depletion of the fuel mixture caused by the presence of an unrecorded air maf.
In engines with pressure sensor (MAP sensor) - enrichment of the fuel mixture caused by an increase in pressure in the intake manifold.
In the engines using both methods of control over the amount of air (due to the significant error of the MAF sensor with a low flow through the sensor), we have idle proceedings and a sharp depletion in transient modes (Japanese cars are the brightest examples).
And in all cases due to reducing the amount of oxygen in the air entering into the engine, the combustion of the fuel mixture in the engine cylinders is disturbed. In general, the dependence is very complicated and for this malfunction of the EGR system on different models cars showed in different ways. Of great importance is the number of exhaust gas applicants (i.e., the opening value of the EGR valve), the general condition of the engine (wear of the spark plugs, the problems of the fuel pump or the accuracy fuel injectors, Rotation frequency and engine load. You are wondering how condition fuel system affects symptoms of non-permistry? The fact is that any engine control unit has a program on which it seeks to stabilize the frequency of revolutions idle move and the composition of the fuel mixture. Moreover, the magnitude of the regulation of the discovery / closing of the actuator mechanism of the system for regulating the idle speed and the duration of the injection time has completely understandable limits. When the control unit is able to stabilize the idle course, in transient modes, it will not cope with the necessary correction of the composition of the mixture, so as pressing the accelerator pedal will lead to an increase in pressure in the graduation range and increase the amount of exhaust gas applicants that do not contain the necessary combustion oxygen. At this stage, all this will worsen the accelerated dynamics of the car, the appearance of failures and jerks when moving. But then the picture of the fault will be changed. The fact is that the split gases interacting with the oil mist in the intake manifold (if you forget where it comes from there, I will remind you about the crankcase ventilation system, the PCV valve will lead to the enhancement of nagarization on the internal parts of the collector, nagar deposits on intake valves, increased contamination of the exterior The parts of the fuel injectors and the appearance of the soot on the insulators of the spark plugs. All this will affect the starting characteristics of the engine and unstable idle turns, and it is possible both jamming and ignition passing and swimming. harsh pressed On gas, the appearance of flashes in the intake manifold. If you do not pay attention to the car at this stage, it is very soon idling completely, or its value will exceed all the permissible limits. And on machines with automatic transmission, a high idling value will very quickly lead to a breakdown of the box.
What to do with it? In any manuals for repair and maintenance it is written that the EGR system has a limited resource. Ideally, it is necessary to replace all components of the system when running 70-100 thousand kilometers, however, this is true with quite high-quality fuel. With Russian gasoline, I could recommend that you replace all components when running 50,000 kilometers. Although in the conditions of the crisis for many it is unrealistic.
What to do to those who cannot afford the acquisition of expensive components, or does not have the ability to purchase the necessary parts. Council One - timely service of the system will extend its service life. What can you have in it and need to serve?
First of all the EGR valve itself. It is necessary to clean the saddle and the valve stem to ensure the tight closure and freedom of the valve stroke. To do this, it is very convenient to use a liquid for cleaning the carburetor in the aerosol packaging. However, we are attentive to enter the fluid on the diaphragm may cause its destruction, since the substances included in the aerosol decompose the rubber.
Secondly, the EGR solenoid (if available). As a rule, contains a small filter to protect the vacuum system from falling into it. It is this filter that needs to be cleaned.
Well, that's the whole list of elements in need of periodic maintenance. By the way, this service is capable of returning many systems to life. Many - but not all.
Is it possible to turn off the system and normalize the engine operation? It is possible, it is enough to cut out of a thin fuster gasket under the EGR valve without cutting holes for the passage of gases. Carefully look at the valve if the rod protrudes for the planting plane, do the hole below it. That's all, but I immediately want to upset the owners of many Fords - the EGR health control system will definitely lit MIL. So you have to put up with a burning light bulb on dashboard. Chrysler and GM owners are easier - with such a disconnection, the lamp does not light up

I disabled it like? I repent. Taken on the Ford Focus website at the same time the bulb does not burn. The sound of the motor is more lying. Consumption has not changed 18-22 liters in the city. Pulls noticeably better.

EGR means "re-burning system of exhaust gases", the process of suction of exhaust gases back into the engine burning of them again. This is a technique that destroys pollutants emitted by the engine.

DPFE means "- Feedback Pressure Pressure EGR

DPFE Sensor - reads the changes in the EGR system.
EGR drive - electric devicewhich allows you to control the EGR valve using a vacuum.
EGR Valve - Vacuum-driven valve, which opens and allows exhaust gases to move from the exhaust manifold to the intake manifold for recycling.
Description EGR and DPFE Systems:
There is a vacuum tube, from the intake manifold to the EGR drive. The drive is located on the fire partition, and this is an electrical device controlled by IRM (pulse-code modulation), which determines how much effort using a vacuum is necessary. From there, the other hose goes to the EGR valve. The drive with a vacuum opens the EGR valve, which in turn allows you to pull out the exhaust gases from the exhaust manifold, via the DPFE sensor, in the intake manifold.
When gas pumping via EGR valve, the flow goes through the DPFE sensor. There is a pressure drop, one tube has a greater cross section than the other. DPFE registers the number of pressure drops and may indicate how many exhaust gas pumps the EGR system. This reports ICM, how much is pumped, and ICM (pulse-code modulation) uses this data to control the drive.

DPFE Sensor Fault: When the DPFE sensor begins to wear out, it gives an IRM (pulse-code modulation) incorrect information. DPFE sensor is less sensitive, and IRM thinks that less Gaza It is survived than in fact. Trying to compensate, the IRM opens the drive too much. This is an excessive amount of EGR mixed with air entering the intake manifold causes failure, it is a classic example of a DPFE sensor failure.
DPFE sensor in focus is not very good, requires replacement (every 30 tons. Miles and sometimes even less).
Note that the final death of the sensor DPFE is very slow process, and the self-diagnosis of the engine will not be determined until the DPFE sensor dwells at all.
If you notice that the car is tupit, and think that it could be due to the DPFE sensor malfunction, draw one of the works listed by the end of this article. If the delay disappears, then your DPFE sensor is greater than the likely reason.
Of course, replacing a bad sensor DPFE, recommended by this problem. However, the work listed in this article does not require much time, and give good resultwhich will not cause any damage and will not cause any error indication, if only the DPFE sensor has not completely bent. Work will take a few minutes, which is just as good for fast diagnostics to find out whether the EGR system draws out, or what is it started ...)

Identification EGR system components

On most focus, DPFE sensor "Flight parameter recorder" (this is not figured out) attached by bolts to the fireproof partition in the center, with 2 rubber hoses decreased from it, and the 3-wire connector included in it perpendicular to the firefire. These 2 rubber hoses are reduced to the EGR channel, which is a 1/2 diameter tube.

In any case, follow the EGR pipe until you see 2 metal discharge next to each other, then follow the rubber hoses that they are dressed and falling to the DPFE sensor.

Everything that will be done, deprives your EGR valve from the ability to open ...
If your car functions like shit, do it. If this eliminates the problem, then you will know that it was buggy your DPFE sensor, or what is less likely to be some other EGR failure.
Basically, all problems on very many focuss were associated with DPFE. This malfunction causes an error "Insufficient EGR stream"

Remove the hose from the EGR valve and both hoses from the sensor DPFE, connect the hose that walked to the EGR valve, to the input from the Pasazhair side DPFE sensor. (He is thinner) This is the only tool if your DPFE sensor fails, but not dead completely. Instead of opening an EGR valve when IRM (pulse-code modulation) encomizes, it will now apply a vacuum to the DPFE sensor, and thus the sensor will see a larger pressure drop, more than the sensor sees with a conventional connection, so IRC will think that EGR The valve is properly ...
If the DPFE sensor is completely removed, you will receive a "insufficient EGR stream."

You can use this option or return to the initial without fear of damaging that neither be.
Advantage:
When so connected, then hot exhaust gases do not destroy the DPFE sensor, so the DPFE sensor will live longer.
Do not forget to plug 2 metal removal to a larger pipe of the EGR channel, where the DPFE sensor was previously connected. A screwdriver tip (type cap, like on the handle) or that neither be that shut up a tight tube to cut off the air ...

Photography of work done, with a "wall" DPFE sensor. Please note that the vacuum tube, which was included in the vertex of the EGR valve, is now connected to the DPFE sensor from the passenger side, (here is a small problem, the hose that walked with an EGR drive on an EGR valve has an internal diameter of 4mm and it is oak, but to tighten on DPFE sensor needed to be 7mm, I left 3 cm thick hose in it in it from the dropper 7-4mm and the hose from the drive ...) From another release of the DPFE, the hose will be accused.
If you confuse the hoses when replacing the sensor, nothing is becoming, but it will not be a sense.

They write that in this way you can postpone the acquisition of a new sensor for an indefinable time ...
Did: he traveled and not bad before, but now it completely disappeared after pressing the gas pedal, it's nice ... not such a poor thing that would go to the same gasoline twice and the same gasoline, these are bourgeois, biodiesel and vodka dilute before use ...

Give one hundred percent hydrocarbon raw materials.

Yes, and the bulb caught it too Huyasho

Cars Ford, like the rest of the European, American machines, from the conveyor are equipped with a system of additional purification of exhaust gases. To do this, the EGR valve is installed under the hood of the car. This is due to the international requirements of the ECO commissions.

However, after 5 years of operation vehicleThe Valve EGR comes into disrepair. The cleaning system is clogged with soot and triggers the opposite effect. The exhaust valve EGR, scored by the soot, the system no longer cleans the exhaust gases, but on the contrary throws into the atmosphere through exhaust pipe Machines even more "dirt". Due to the spoiled valve, the USR exhaust becomes black, which is why pollution occurs ambient, And the car loses its potential properties - the speed is dropped, the engine is clogged, it is nervously held turns, a number of systems can turn off at all, and the "Check" error light lights up on the driver's dashboard.

Decide this problem In Ford machines, you can only remove the removal of the USR valve, a small adjustment of the system, as well as a special firmware of the electronic control unit.

Removing EGR, flashing ECU on Ford

On the vehicles of the Ford (as in many other foreign cars), the removal of the USR valve must be accompanied by reprogramming the electronic engine control unit (ECU). This is explained by the fact that all electronic elements under the hood so or other intersect with the ECU, the electrical panel is closed, and the program installed by manufacturers directly interact with each sensor or device, and the EGR valve is not an exception.

Thus, if you just find the EPR valve under the hood, cut it and then connect the exhaust system directly, the engine of this "will not understand." According to the installed program, the ECU will still contact valve Egrr., look for information about its condition, read data from an oxygen sensor, etc. Accordingly, the error will not disappear anywhere, the engine and exhaust system Anyway will work incorrectly. And the absence of an EGR valve with a non-remote error in the ECU can lead to more disastrous consequences and deterioration of the engine!

Professional Removal of Valve ERG

Masters of car service Hepesty in Ramenskoye (near Moscow, Lyuberts, Zhukovsky) are professionally engaged in reprogramming electronic components. In the service center, experts competently remove the USR valve for Ford, and then reflash the electronic unit Control. With the memory of a computer, Ford simply deletes information about EGR and the sensors associated with it, and the system is electronically adjusted so that exhaust gases will no longer be sent through the EGR system, and they will go directly into exhaust through subsequent filters.