A device such as a particulate filter has been available in all diesel cars manufactured since 2011 (as well as on a number of models manufactured after 2000 - then it was not yet a mandatory element, but was already used by some car manufacturers) in the territories of countries included in WTO (Euro-5 standard adopted by the Customs Union).

New particulate filter
Particulate filter after working out

The main task of such an element is to maximally clean exhaust gases from impurities harmful to the environment.

The use of particulate filters has reduced the content of soot particles in the exhaust diesel vehicles almost 100% - more precisely, 99.9%.

What is a car particulate filter and how does it work?

On the this moment There are two types of soot cleaners used in cars:

DPF particulate filter (abbreviation for the words Diesel Particulate Filte) for diesel car captures soot particles up to 1 micron in size, which are formed as a result of fuel combustion. Such a filter is simple in design, but it requires regular cleaning (regeneration) actions.

The FAP type filter (an abbreviation of the French expression Filtre A Particules) is a more complex device that does not require regular intervention. Regeneration (purification) occurs here automatically.

Location particulate filter(see Fig. 1) - in the exhaust system, behind the catalytic converter. In some cases, it can also be combined with a converter, and then its location is directly behind the exhaust manifold.

This is the place where the exhaust gases have the highest temperature. In this embodiment, the device is called a "catalytic coated particulate filter".

The average resource of particulate filters is designed for a mileage of 150 thousand km. But this is the European standard. On Russian fuel, according to the reviews of owners and employees of car services, this figure is almost three times lower.

At the moment when the on-board computer gives an error indicating that the particulate filter is clogged, the car owner will need to make one of the following decisions:

1. Complete particulate filter replacement. A very costly undertaking. Of course, the price depends very much on the make and model of the car, but in any case, this action is much more expensive than all the items listed below. For example, on a BMW, replacing a particulate filter will cost approximately 1,500 euros.
2. Physical removal of the particulate filter. The procedure is also not cheap, and has several disadvantages. It is not enough just to take and cut out the filter, replacing it with a pipe section. A number of procedures are tied to the data coming from the particulate filter sensors on-board computer, which means that it will be necessary to replace its firmware. Replacing the firmware does not always go smoothly, in some cases errors occur (false indications, other problems with the on-board computer).
3. Diesel particulate filter sensor cheat. It consists in installing a separate device that emulates the normal operation of the sensors (fakes signals) or software removal of the particulate filter from the electronic control unit system. This procedure does not relieve the owner of the car from cleaning the filter itself. However, it significantly extends its life or allows you to easily remove the particulate filter with the least errors in the operation of the on-board computer.
4. Regeneration. The most correct procedure, because the removal of the filter increases the emissions of harmful substances into the atmosphere, despite the fact that even without this element European cars successfully pass technical inspection according to Russian standards. At the same time, the cost of filter regeneration remains acceptable in comparison with the same removal or replacement, although they require periodic repetition.

VIDEO INSTRUCTION

Types of regeneration - cleaning methods

In fact, a particulate filter is a container filled with a substance with a porous structure (ceramics is most often used). When passing exhaust gases through these "honeycombs" soot and fumes settle on the pores of the filler.

Over time, the pores become clogged and the passage of exhaust gases becomes difficult, which leads to an increase in fuel consumption and a decrease in engine power, and the risk of various problems increases.

To restore the properties of the filter, a regeneration procedure is performed, which can be of two types:

1. Active. The pores are cleaned by raising the temperature inside the filter to 600-1000 degrees Celsius. At this temperature, the soot burns completely.
2. Passive. Here, soot removal also occurs due to its combustion, but combustion occurs at a temperature of about 350 ° C (this is the normal temperature of diesel exhaust gases). Soot oxidation requires a special catalyst that lowers the reaction temperature - for example, platinum in filters Volkswagen(the same catalytic coated particulate filters that were mentioned earlier).

Active regeneration requires the implementation of special procedures by the car owner, and passive regeneration occurs without any participation of the car driver.

If regeneration does not have the desired effect, then you can always simply rinse the filter. Flushing the particulate filter performed after removing it from the vehicle. The unit is placed in a special chemical composition for a while, and then the same composition is passed through a filter under pressure.

How to start particulate filter regeneration

To increase the temperature inside the particulate filter for complete combustion of soot, you can use one of the following methods (active regeneration):

1. Introduction to fuel mixture special additives (most often based on cerium), which, when passing along with the exhaust gases, continue to burn. In this case, the removal of the vehicle assembly itself is not required. The disadvantage of this method is its low efficiency - the method can give a positive effect only at the initial stage of pollution (no more than 2000 - 3000 kilometers from the moment the error indicator on the on-board computer panel is triggered).
2. Starting a special engine operation procedure through the block electronic control auto. In this case, the air supply is reduced, the fuel is injected on the exhaust stroke (that is, it enters the exhaust system unburned). In some car models, original technologies are used, for example, an additive is additionally introduced, or the outflow of burnt gases is reduced, etc.

If regeneration does not help, it is necessary particulate filter repair.

It will be removed, disassembled and cleaned by hand or completely replaced in the workshop. Of course, this can be done with your own hands, but it is better to trust the experts.

The regeneration procedure starts most often without user intervention:

1. The sensor for increasing the level of soot in the filter is triggered.
2. During the movement, the control unit will independently increase the speed, reduce the air flow and clean the particulate filter.

But, if cleaning attempts are unsuccessful, or the soot level is critical, then the control unit will refuse cleaning attempts and display an error.

In this case, you can try to start the procedure yourself through the service menu of the electronic control unit (ECU) and follow the instructions of the system (if the automatic speed control mode is not supported).

It all depends on the car model and EBP firmware. In some cases, it may be necessary to know service codes or connect external diagnostic devices.

What liquid will help to regenerate a diesel particulate filter

If you do not become the owner of a car with a particulate filter with a catalytic coating or a built-in automatic regeneration procedure, then you can always resort to the use of special additives.

You can try to restore the particulate filter, for example, using universal tools:

1. Regeneration catalysts from ARDINA - Diesel Particulate Filter Regeneration Aid (poured into the fuel tank as an additive).
2. Liqui Moly Pro-Line Diesel Partikelfilter Reiniger is a cleaner that requires forced injection, after application it must be neutralized with another solution (Pro-Line Diesel Partikelfilter Spulung).
3. Liqui Moly Diesel Partikelfilter Schutz is another additive that acts as a catalyst.

VIDEO DESCRIPTION

If the car uses an original additive (for automatic supply from a special tank in the particulate filter regeneration mode), then it should be ordered from authorized dealers.

Severe contamination of the particulate filter negatively affects the performance of the entire vehicle, and which car owner will like the fact that the car has noticeably increased fuel consumption, decreased traction, and besides, annoying control lamps are lit all the time. Of course, the issue can be solved by replacing the part, but it will be necessary to pay a fairly decent amount for this. The only reasonable way out in this situation, from the point of view of most motorists, is to completely remove the filter from the car, but not everyone thinks about possible consequences. More on this later in the article.

The particulate filter is an important element of the exhaust system. diesel engine. The task of this device is to clean the exhaust gases from soot to prevent them from entering the environment (about 90 percent does not go outside).

The use of particulate filters began in 2001 on trucks. However, after the introduction of the Euro-5 environmental standard in 2009, all automotive manufacturers obliged to install this filter element on cars of any type and class running on diesel.

Diesel particulate filter housing without the filter itself

The particulate filter is made in the form of a metal cylinder. The cylinder has outlet and inlet pipes for connection to common system exhaust gas cleaning. Inside it is a ceramic matrix. In addition to it, sensors are mounted on the particulate filter that control its operation. Depending on the design, the particulate filter can be mounted in different ways.

The principle of operation of the particulate filter

The particulate filter operates in two stages:

Stage 1 - soot capture. Soot particles at this stage settle on the walls of the filter element, which resemble cells in appearance. Soot, however, does not remain here completely, but only particles larger than 0.5 microns. The rest comes out with exhaust gases, although the percentage of such precipitation is small - about 10 percent.

Stage 2 - regeneration. A laborious procedure for cleaning cells from soot deposits. The process takes place in accordance with the regulations prescribed by the manufacturer.

Diesel particulate filter cleaning methods

There are two ways to clean the particulate filter - active (forced) and passive.

Passive regeneration is carried out by the car owner independently when an appropriate indication occurs and with noticeable symptoms of deterioration in performance. power unit(decrease in dynamics, drop in power, and so on).

The most important thing in this case is to provide an increase in temperature for the exhaust gases, which can be obtained if you drive thirty to forty kilometers at full load. This mode of movement ensures the combustion of soot and its cleaning. Alternatively, you can still use special additives in the fuel, which lead to a decrease in the temperature of soot combustion.

active regeneration. Such a mode, which allows cleaning, can automatically turn on the motor control controller, for which it analyzes the information that the current temperature sensor and the pressure difference sensor transmit to it. This sensor indicates that the particulate filter is clogged with soot particles, and its value is determined using the current temperature sensor. If the temperature is not enough for the soot to burn, the controller can, for example, perform an additional injection of fuel produced when exhaust gases are released, which will cause it to burn directly in the exhaust system, and also increase the temperature of the exhaust gases to the required value.

If the exhaust system installed on a diesel engine also provides for other measures aimed at increasing the temperature of the exhaust gases that enter the particulate filter, the control controller also uses them.

What is the difference between a diesel particulate filter and a catalytic converter?

The particulate filter is designed to prevent/minimize the release of soot into the environment. It is considered part of the muffler and its main task is to clean the exhaust gases. But, you should not compare this device with a catalytic converter, since the catalyst fights exhaust gases, and the particulate filter only fights soot in them.

Positive aspects of operating a diesel engine with a particulate filter

The positive aspects of the operation of a diesel engine with a particulate filter include the compliance of the car with Euro-5 environmental standards. The vehicle does not pollute the atmosphere, and people no longer have to breathe soot.

Negative aspects of operating a diesel engine with a particulate filter

There are a number of negative factors that arise when using a particulate filter:

1. Increased fuel consumption.
2. Substantial maintenance and replacement costs.
3. Loss of personal time due to the start of regeneration (if it has started, it cannot be interrupted) and car maintenance.
4. Systematic deterioration of vehicle performance as a result of a decrease in the throughput properties of the filter.

If the particulate filter is taken out of operation, the positive and negative points

Benefits of removing the particulate filter:

• Eliminates the need for filter element maintenance.
• The power unit works more stable.
• Improving the dynamic performance of the vehicle (increasing power).
• Reduced fuel consumption.
• There is no need for a regeneration mode.
• Lack of motor emergency mode and errors due to a clogged filter.

Disadvantages of particulate filter removal:

• Deterioration of environmental indicators. Although the inspection can be passed, the level of soot emission into the environment rises sharply.
• The vehicle is out of warranty (if any).
• An increase in the load on the turbine, which slightly reduces its resource.
• In some cases, there is an increase in the amount of black smoke from the exhaust pipe.
• Problems with the operation of the car in the countries of the European Union, where all cars must comply with the Euro-5 environmental standards.

Particulate Filter Removal Steps

The particulate filter removal process consists of two steps - physical and software.

physical removal step (step by step)

The physical stage is not difficult. The craftsmen find the jar where the catalyst and filter are located and cut it out. On some car models, this will require the removal of the exhaust pipe. Instead of a filter, you need to put something, for example, ordinary metal plugs or flame arresters. Mounting a flame arrester will slightly increase the life of the muffler. If the element is equipped with carbon dioxide probes and temperature sensors, it may be necessary to remove them and install them in a plug, which makes it possible to avoid programming errors.

1. First, disconnect the sensors and cut the exhaust pipe located after the filter with a grinder.
2. Then we unscrew the bolts from the side of the motor, cut and open the filter casing.
3. We get the device. You may need to knock out individual segments.
4. We weld the body and install it in place. We connect the sensors.

reprogramming the engine block (flashing methods)

After that, the power unit should be reprogrammed. If this is not done, the sensors will assume that the filter is constantly clogged. The result is a demonstration of fault codes, and sometimes the emergency mode is turned on at all.

This part of the procedure is carried out only by experts service center. The result can be achieved in three ways:

• Install firmware from the vehicle manufacturer. This is the best option which carries virtually no risk.
• Install firmware developed by enthusiasts. This is a kind of lottery - not the fact that you are lucky. The quality of the firmware varies greatly.
• Install firmware from such a version of the car, where by default there is no particulate filter. The method is fraught with a decrease in functionality, for example, cruise control is turned off on the Honda CRV.

In some Ford, Mazda, Toyota and Nissan models, it is impossible to perform a regular flashing - you have to use the emulation method. A decoy device is mounted, which makes the unit believe that the filter is in its place. The controller does not notice the removal of the element, as it receives the appropriate signals. But this option has one drawback - the regeneration mode will turn on smoothly, so that fuel consumption will not decrease.

Possible risks to which the car is exposed during the above work

Firstly, when you remove the particulate filter yourself, there is a risk of breaking something, which will entail more big problems and the cost of repairs will increase significantly.

Secondly, if the engine block is not reprogrammed correctly, the system will see that the filter is not clogged, and this simply cannot be, so it decides that the particulate filter is faulty and translates vehicle v emergency mode, not to mention the fact that the system will constantly issue fault codes.

Thirdly, many motorists say that after removing this device, the dynamics of the car improves. The reason is obvious - as a result of the removal of the particulate filter, the resistance of the exhaust gases is reduced. However, is it good? Due to the increase in the flow rate of the exhaust gases, the speed of rotation of the turbine increases, which, in this case, exceeds the design speed. As practice shows, often after the removal of the particulate filter, the turbine fails.

Do I need to remove the particulate filter? It's up to you to decide. The car really becomes simpler and cheaper to operate, the power increases slightly. But you need to order this event only from highly qualified specialists, otherwise you can get more trouble than good.

How to find and order spare parts and accessories for trucks, buses, snowmobiles on Aliexpress at a reasonable price and free shipping

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3. Then, on the left side of the page, near the "Categories" line, click "View All".
   
   
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In the process of fuel combustion, soot microparticles are formed, which are released along with the exhaust gases. A particulate filter is used to prevent these particles from entering the system. It is a membrane that retains such rubbish in itself. And this necessary element for the functioning of the system.

The design and principle of operation of the particulate filter

This element is a system of cellular membranes. Based on a silicon carbide compound, the system does not allow particles to pass through it, delaying them. Thanks to their technical specifications- it is an effective tool in the purification of exhaust from soot.

Another advantage that ensures a long service life of the device is the possibility of regeneration. At an exhaust gas temperature of more than 500 ° C, soot simply burns out, and the membranes are cleaned. Therefore, you can use such an element for an extremely long time, if you follow the operating conditions.

However, sometimes the filter becomes clogged so that the built-in regeneration does not allow cleaning it. The system simply cannot burn out the remaining soot. This leads to its entry into the system, which further negatively affects the operation of other mechanisms. Therefore, you can’t ride on a clogged filter, you need to clean or remove it.

Signs of a Clogged Filter

If the filter is blocked by clogging, then various signs can indicate this. Often this is an ordinary sensor, the signal of which can be seen on the instrument panel. But sometimes it does not show the correct values ​​or is simply broken, and you need to monitor the status of the filter. In this case, it is necessary to monitor the symptoms and diagnose at the first signs, among which

• black smoke from the exhaust pipe;
• engine thrust drop;
• increased fuel consumption;
• irregular engine operation.

It is also possible to hiss while driving. Another indicator is the high oil level, as well as the sensor itself, if it is working. It is forbidden to drive with a clogged filter, because this is followed by a complex breakdown of the car. Therefore, when the first signs appear, it is worth trying to turn on the regeneration of the element, and if this has not changed anything, then go to a car service.

Advice! An important indicator of a clogged filter is the sound of the engine. With a clogged membrane, it can become arrhythmic. However, it is better not to bring it to this stage.

Removing the particulate filter

Although a diesel particulate filter is important for a car, its cost is extremely high. If this element breaks down, the owner of the car must spend from 500 euros for a replacement, which is a significant cost for any motorist. Therefore, a temporary solution is to remove the particulate filter without installing a replacement. This will allow soot not to enter the system, freely going out.

Removal consists of two stages:

• physical removal from the vehicle;
• disabling an element in the engine control unit.

The first task is simple and consists of physically removing the filter. Often, the cleaning unit remains, but the cleaning membrane itself is removed from it. This allows you not to interfere with the course of the exhaust gases. However, one more problem remains - the sensor that determines the operation of the element. If it is missing, then the system will receive signals about a device malfunction. As a result, the control unit will reduce the intensity of the engine, as with a completely clogged membrane.

Disabling an element in the control unit is an additional firmware. Most cars are exposed to it, which allows you to adjust all the processes responsible for checking the performance of this device.

If the first method is easily carried out without additional equipment at home, then for the second you need a special one.

Advice! You can physically remove the membrane yourself, and then order the firmware of the control system. This will work out cheaper than complex procedure.

Do-it-yourself filter removal

If you need to remove the filter yourself, without using the services of a car service, then you need to carry out a number of procedures. The first is the direct removal of the membrane. It is located in the far part of the element, it will not be difficult to find it. It is necessary to cut the side wall of the device and remove the membrane. You don't have to worry about its safety. If it is no longer recoverable, then it can only be thrown away.

After carrying out such procedures, the sawn wall returns to its place and is tightly welded. The filter can be installed in place.

Next, there is one more task: it is necessary to deceive the control system. Otherwise, it will significantly underestimate the operation of the engine, as it will consider the filter damaged or clogged. To do this, you need to change the firmware using special devices like K-TAG or Alientech KESSv2. The problem is that without experience it will not be possible to carry out this. Even if you find such devices, there is a big risk of damaging the control system, and this can lead to other, already physical damage.

However, for do-it-yourselfers, there is another solution - using an emulator. Special FAP/DPF emulators can be installed in place of the sensor, simulating proper filter operation. Such a decision will allow you to deceive the system.

The advantages of installing an emulator are as follows:

Wherein the electronic unit controls remain intact. This option is optimal in many cases.

The consequences of removing the particulate filter

Although many manufacturers insist on the use of a particulate filter, this element is optional. It appeared during the transition of cars to the Euro-4 class, adopting new exhaust gas standards. However, on the roads there are a lot of cars of Euro-3 class and below, which do not have this element at all. Given that the design of the engine with and without a filter is the same, its removal will not bring significant problems.

Among the main consequences of its removal, it is worth noting:

• disabling regeneration and all its consequences;
• restoration of the previous consumption and engine power;
• disable errors and alarms about the filter;
• increase in harmful substances in the exhaust;
• slight darkening of the exhaust gases.

In terms of convenience and ride comfort, the benefits are enormous. There is no need to go to the tracks to turn on regeneration, periodic soot does not appear for the same reason. However, the content of soot and harmful substances in the exhaust increases. In addition, the absence of a filter lowers the car in the scale of environmental friendliness, which is also worth considering.

Advice! Before removing the particulate filter, it is worth trying to flush and regenerate it. Often, such measures are able to partially restore the functionality of the element.

And for a better understanding of the filter removal procedure and its features, you should watch this video:

It describes the steps for extracting an element from the system, reconfiguring the control unit, as well as other nuances of this process.

Everyone knows that the 70s of the last century were marked by an increase in fighters for the cleanliness of the environment. After all, there are a lot of cars on the roads every year, and all of them seriously pollute the atmosphere of the planet. Concerning gasoline engine, then a special catalytic converter was developed for the purity of its exhaust gases, but a diesel engine operating on a different principle needs appropriate purification from a large amount of soot. For this, a diesel particulate filter was invented. Let's try to figure out what it is.

Before understanding what it is, it is necessary to turn to the main thing - the principle of ignition of a mixture of a diesel engine. After all, in order to set fire to gasoline, special spark plugs are used, which a diesel engine does not have. Diesel fuel ignites due to increased pressure, which causes the mixture to heat up, and, as a result, it ignites. Because of this, the developers are faced with the task of a slightly different scheme for cleaning exhaust gases from harmful impurities.

A particulate filter is a device that is designed to clean the exhaust gases of a diesel engine.

This device allows you to reduce the soot content in the exhaust gases by about 90 percent. Initially, in 2001, the particulate filter was used only on heavy trucks that consumed a lot of diesel fuel, and later, when 2009 came, the corresponding Euro-5 standard was introduced, which obligated all diesel motor complete with appropriate cleaning devices.

Principle of operation

In general, the operation of such a filter practically does not differ from the task of a conventional catalyst. The exception is that it is designed to capture soot and not harmful substances. In addition, all this is performed not in one, but in several actions:

1. Soot capture. Large fractions settle on special cells, which are very small. Smaller particles, which make up only 10 percent, pass through these small channels. Over time, the amount of soot that settles on the cells in such quantities that the motor power drops, as it becomes more difficult for gases to break through the narrow walls of the device. Because of this, the filter must be subjected to cleaning or "regeneration".
2. Regeneration. This is a very complex process that is carried out in several ways, depending on the manufacturing company. However, its whole point is to clean the particulate filter from excess soot. We will try to consider it in as much detail as possible.

To describe the whole cleaning process, we will first tell you how the cleaning of the exhaust gases themselves is carried out. The bottom line is that such a filter, for example, like that of Volkswagen, can combine two devices at once - soot cleaning cells and the catalyst itself. The bottom line is that cells are installed in the middle of the filter that trap large particles of dirt, and the walls themselves are treated with titanium from the inside, which contributes to the almost complete burning of unused particles.

It is no coincidence that you learned that a catalytic converter is used in the filter. The essence of his work is limited not only to cleaning exhaust gases, but also to a good warm-up of the entire filter as a whole. Thus, the soot particles begin to overheat strongly, which causes them to burn. This means that they become smaller and go along with the rest of the particles further along the exhaust pipe.

Based on this, we can draw the appropriate conclusion that the particulate filter in a diesel engine performs two useful functions at once for cleaning exhaust gases.

The main condition for regeneration is a long trip on the highway. If you move for short distances, then the catalyst will not be able to heat the body up to 650 degrees Celsius, which means that the filter will become more clogged, and the engine power will continue to decrease.

French automotive designers have developed a different way to clean the soot filter. To do this, they installed a tank with a special additive, which is injected into the car every few kilometers. exhaust system and ensures the combustion of soot. The system is controlled using a special program embedded in the ECU firmware.

This is how the diesel particulate filter works. We wish you good luck on the roads!

20.01.2014

The consequences of malfunctioning diesel particulate filter (DPF) regeneration on the Nissan Qashqai

This article will be a logical continuation of the conversation about malfunctions associated with the "soot" (colloquial).

The full and correct name of this device is: diesel particulate filter (abbreviated as DPF) -( filter for purification from solid macroparticles in diesel exhaust gases); or "diesel particulate filter" or "diesel particulate filter" or "diesel particulate filter".

"What is a particulate filter, and why is it needed?"

I will not repeat myself and therefore I refer the reader to my article published on the Legion-Avtodata website:
« particulate filter » ,

Customers sometimes ask, they say, are there cars without a "soot"? The question is logical, because the cost of replacing a particulate filter with a new one is high, several hundred dollars. Yes, there are such cars without a particulate filter. And I can’t give any hope: the vast majority of diesel cars are produced and will be produced with a particulate filter. It won't get better, customers will have to accept this as a "given" and get used to the fact that in order to operate such cars, they will need to read and follow the attached instructions.( below in the text ). If you follow it, then the car will serve "happily ever after" - within the limits allotted to it by the Manufacturer.

However, drivers who have a car with a "soot" and live in big cities and use their car in the "left for work - traffic jam - traffic jam - arrived" mode should keep in mind that such operating conditions are not provided by the Vehicle Manufacturer. Of course, on-board electronics frees a person from worries as much as possible and the necessary procedure called “regeneration” occurs automatically. But regeneration requires certain conditions. And constant trips in the "traffic jam - traffic jam - traffic jam" mode lead to conditions when the regeneration is of poor quality or even interrupted.

It was this car that came to us for diagnostics and repair. At first we heard a sound, it was approaching and approaching, and then the car itself appeared around the corner. Completely new and modern car, Nissan Qashqai (Nissan Qashqai).

Better muffle it, - we asked the client, because the sound of a running engine was too terrible. This is how a tank or tractor engine can work, but not an engine passenger car. And here is the car in the box: the last years of production, in appearance it is completely “not killed”. But what a sound! What is the reason for this sound?

Before you do something, you need to comprehend the situation. What's the motor? Looked:

How was the car used? They asked. Everything is standard, everything is normal, there are no starting points:
“Everything happened suddenly, the car was operated as standard - parents drove, middle-aged people. The soot light came on several times, they drove onto the highway, drove the car at high speed and the light went out. And at some point it caught fire and didn’t go out anymore. ”

"Diesel Particulate Filter (DPF) Malfunction Warning Lamp"

This warning lamp comes on when the ignition key is turned to the ON position. After starting the engine, the control lamp should go out. This indicates the health of the system.

If counter, the DPF malfunction lamp lights up when the engine is running, which means that the amount of soot accumulated in the filter has reached a certain limit. If this happens, then at the first opportunity, start driving at a speed of about 80 km / h until the counter, the lamp goes out. In doing so, the statutory speed limits must be observed. Soot particles accumulated in the DPF cannot be burned when driving at a lower speed. After the soot particles are completely burned off, the DPF malfunction indicator lamp will turn off.

Well, we continue to study the malfunction: “What about our mistakes?” Now the electronics are so advanced that the motor is only going to sneeze, and the diagnostic system is ready to throw out a fault code. What is here?

Is it clear now. Even some thoughts appeared. Well, it’s not worth asking about the soot planter and regeneration from the client, the majority doesn’t delve into all these subtleties a little and only catches on when the “rooster pecks”.

We will remember:

In the phase of exhaust gas release from the engine cylinder, an additional portion is injected into the cylinders diesel fuel, which no longer takes part in pushing the piston - part of this fuel has time to leak past piston rings in the engine tray

· Owners of cars with a diesel particulate filter living in megacities, with constant traffic jams, quite rarely can provide their car with such a condition, as a result of which regeneration can start much less often than necessary; it should also be taken into account that in no case should you interrupt the regeneration process by turning off the engine

Interrupted regenerations lead to accelerated overflow of the particulate filter, it is already clogged so severely that the regeneration process is not able to completely clean the particulate filter,-

The key words here are: "an additional portion of diesel fuel is injected into the cylinders, which no longer takes part in pushing the piston - part of this fuel has time to leak past the piston rings into the engine pan."

Well, let's see what is in the pan of this engine? And you will excuse me that we have to show such dirty, but such is our work - this is an ordinary rag, on which they dropped what was left on the dipstick:

Yes, it is clear that we are not a laboratory and did not give “this” there for analysis, but even without sniffing much, it became clear that there was “bare diesel fuel” in the pan.

And now it’s simple and accessible: “Due to violation of the regeneration conditions, a lot of motor fuel got into the engine sump and the engine, in fact, worked on diesel fuel”.

You can listen to how it worked and its sound of work on the audio recording:

But this is already the work of the motor after it has been made complete replacement oil, and that “tractor” sound that I spoke about earlier was much stronger and louder.

Customers ask: “How often should regeneration take place? How do you know if it's right or not?"

Here you can say this: “if regeneration occurs in the normal mode, and this is 2-3 times during the replacement period engine oil, then that's fine. And the amount of diesel fuel that got into the pallet is small, non-critical and is taken into account by the Manufacturer. But when regeneration starts every 100-300 kilometers due to a clogged particulate filter, diesel fuel gets into the oil often and then the amount of motor fuel in the sump increases much. An example is this car. Regeneration on it occurred so often that the amount of diesel fuel exceeded all reasonable limits - the motor “knocked” (the sound of this motor:http://yadi.sk/d/XdQCL8w0BywuP ). This is what it leads to long-term operation with a faulty particulate filter.