Diesel particulate filter. Particulate filter: why is it needed on a car? Whether particulate filter

particulate filter Features of the operation of the particulate filter in urban conditions.

If the car does not accelerate to the required temperatures, depending on the brand, someone has 30 km / h, someone has 50 km / h, there is no stable speed above a certain threshold, the particulate filter does not go into regeneration mode. This is due to banal safety: since there is a certain amount of carbon in the filter, which, when oxidized to carbon dioxide, will release temperature.

In this situation, there is a risk that the particulate filter housing will heat up to a critical temperature and may damage the anti-corrosion coating of the body, etc. In the future, anticorrosive under the bottom will begin to smoke.

Therefore, most brands have a limitation that the filter is burned through only in certain engine operating modes in motion.

How to guarantee the cooling of the particulate filter

When we are standing in city traffic jams, especially in winter, the particulate filter does not go into burn-through mode. The control unit reads the signals from the ABS sensors, sees that the speed is not sufficient, and the particulate filter accumulates soot. Fine soot particles accumulate in pockets, as shown in the figure below.

Read more about the particulate filter device.

With a certain frequency, a certain number of them accumulate, the resistance of the exhaust filter increases, and it reaches a certain value at the inlet and outlet, in this situation, you need to put a backpressure sensor in front of the filter and modern engine will enter the regeneration mode.

In this case, the injectors give an additional injection of one more portion of fuel at the moment of the working stroke. As a result, the fuel ignites when the exhaust stroke begins. That is, when the piston throws all the burning substances into the exhaust. In fact, a burning torch flies into the particulate filter from the cylinder. It raises the temperature inside the particulate filter, soot under the influence of platinum begins to oxidize to carbon dioxide, and in gaseous form, substances seep through the porous ceramics, as shown in the picture, and the particulate filter is operational again.

The resistance is reduced to the desired threshold, the regeneration mode is turned off, the car drives on.

How does a particulate filter get clogged in traffic jams. Regeneration does not occur

There are certain restrictions in traffic jams, and it is in this situation that the following happens: accumulation is on, but the mode is not activated, over time, soot accumulation will occur above a certain threshold, after which the car’s control unit will inform that it’s time for the owner to go to a car service. Namely, it will show that the particulate filter is clogged, regeneration is no longer possible above a certain limit, and all that remains is to go to the service.

Diesel particulate filter replacement and its cost

There are several solutions to this problem. If the clogging of the particulate filter has reached such a level and the owner immediately reacts to the sensor and comes to the service, then with special. appliance dealers, you can activate the regeneration mode. At the same time, there will be a characteristic, smoky carbon dioxide exhaust, under the supervision of specialists, the engine will work in desired mode so as not to overheat the bottom of the car.

If you start this problem, and not immediately go, but with a delay, then the degree of clogging of the particulate filter can step over the second critical border, where even from the dealer scan there will be a burnout ban. And then any official dealer says that only the particulate filter needs to be replaced.

Recall that the main element of this filter is platinum, so the cost of the device is very high. Well, for example, if you take the filter of a medium-sized passenger car, then the cost can reach from 1000 euros.

What to do in such a situation if you do not want to buy a new soot, or simply, as they say, there is nothing.

Let's consider several options:

1. Removing the particulate filter. But at the same time, not for all cars, it is possible to make the control unit work in the case of a particulate filter replaced by a flame arrester. Because they catch both the pressure drop and the drop in the content of certain substances, with these components, the control unit will not allow the car to move. Basically, it is possible to deceive the system with older generation models. Newer and more modern will no longer succeed.

The one who cannot be deceived will have to live with him throughout the entire operation of the car. And sooner or later it will have to change. At a minimum, do not stand in traffic jams for a long time, especially in winter. After each stop, let the system regenerate, drive a certain number of kilometers along the highway at a certain speed, so as not to let it completely clog.

2. There is a second decent and fairly economical option, in addition to replacing it. It will be an interesting option for both the car owner and the car service. This is the maintenance and cleaning of the particulate filter.

Diesel particulate filter diagnostics and problem solving

Let's look at an example and a possible way out of the situation. If, during diagnostics, such an inscription appears as in the figure: "The particulate filter is full" - this situation is taken from VAG.

It is necessary to work on this problem. You have a choice.

As you can see in the figure, the difference in cost reaches 10 times. Cleaning the filter for both the owner and the service costs less. When servicing the particulate filter, it will retain its performance, it will not damage anything, and the owner will not have to worry about replacing and overpaying money.

How to clean and how, we will talk in the next article. And consider products such as diesel particulate filter cleaner, cleaning fluids, and preventive additives to reduce device clogging during vehicle operation.

Read an interesting article

Different types of fuel used in gasoline and diesel engines, as well as the fundamental difference in the methods of igniting the combustible mixture in cylinders, require designers to approach the problem of cleaning differently. exhaust gases.
The tightening of requirements for the content of harmful substances in exhaust gases also affected the standards that establish the maximum amount of solid particles contained in them. As a result, it was necessary to equip exhaust system diesel engines with an anti-particulate filter, or, as it is commonly called, a particulate filter.
Let's figure out what it is - a particulate filter on a diesel engine, what features the operation of a car has, the exhaust system of which is equipped with a particulate filter.

Diagram of the diesel particulate filter

The particulate filter is designed to trap particulate matter (soot) in diesel exhaust gases.

This element of the exhaust system is designed to trap particulate matter (soot) contained in the exhaust gases of a diesel engine.
Accordingly, it is installed in the exhaust tract - moreover, depending on design features car and the filter itself, it can stand immediately after the exhaust pipe or after the catalyst. Some designs combine a particulate filter and a catalyst, the elements of which are located in a single housing.

How does a diesel particulate filter work?

Exhaust gases enter the closed channels and diffuse through their walls, entering the open channels. Further, the gases continue to move through the exhaust system already cleaned of soot particles and, depending on the design of the exhaust system, enter either the catalyst or the muffler.
In cross section, the channels of the particulate filter usually resemble regular octagons - it is this shape that contributes to the maximum retention of soot by the filter. The filter element is made of silicon carbide and enclosed in a metal housing that does not resemble the rest of the exhaust system in shape. It is impossible to retain soot in another way due to the small size of its particles - about 0.05 microns.

Operating a car with a particulate filter

Filter element clogged with soot

What is a particulate filter on a car from the point of view of a driver who wants to get the most out of the engine?
This is, first of all, an obstacle to the path of exhaust gases - especially when it is clogged with soot. There are three ways to eliminate this interference or reduce resistance:

The particulate filter is a hindrance in the path of exhaust gases - especially when it is clogged with soot.

particulate filter cleaning;
its replacement;
removing the filter altogether.

The service life of a particulate filter on a diesel engine is on average about 150,000 - 180,000 km. If the car is not used intensively, then this is a fairly large mileage, and you can replace the filter without resorting to additional actions - flashing the engine ECU, for example. But in the event that the car is working hard, and “covers” such a distance in two to three months, then it is preferable to completely exclude this element from the exhaust system - the prices for particulate filters installed on a diesel engine start at 900 euros, and motor oil for a diesel engine with a particulate filter, a special one is used and it costs more than a “normal” one.

Automatic diesel particulate filter cleaning

To control self-cleaning systems and (or) to signal to the driver that the filter is clogged with soot, sensors are mounted in its housing. If the filter capacity is violated, the DPF (Diesel Particulate Filter) lamp lights up on the instrument panel.
In addition, if the diesel particulate filter is clogged, the following symptoms appear:

the power and traction qualities of the engine are reduced;
fuel consumption increases;
start to "float" idle speed.

An experienced driver will also notice a change in the sound of the engine.

Modern diesel engines are equipped with electronics that can turn on the filter self-cleaning mode. As a rule, self-cleaning is carried out in one of two ways:

Modern diesel vehicles are equipped with electronics that can turn on the self-cleaning mode of the particulate filter.

The engine ECU, having processed the signal from the sensor installed in the particulate filter, gives the corresponding signal (Exhaust Gas Recirculation), which connects the exhaust and intake tracts, passing through part of the exhaust gases back into the cylinders. By changing the position of the valve flap, EGR system forms the air flow in such a way that the gases entering the particulate filter have a higher temperature than usual, and the soot burns out.
Some cars are equipped with an additional container that contains special composition, when it enters the particulate filter, pollution also burns out. Electronics also controls the whole process.

How to clean the diesel particulate filter yourself?

The particulate filter becomes clogged, as a rule, from insufficient heating of its filler, which leads to poor burnout of contaminants. This usually happens during urban driving - when insufficient engine speed does not favor the heating of the exhaust tract. In addition, when the engine is running Idling or at low speeds, enriched fuel mixture which does not burn out completely.
If the design of the car only provides for informing the driver that the filter is clogged, then it is necessary to ensure that the engine runs at high speeds in order to raise the temperature of the “exhaust”. Simply put - you need to "ride with the breeze."
You can also wash the particulate filter with a special solution, after removing it from the car. For high-quality washing the entire filter housing must be filled. However, detailed instructions instructions for use of the flushing agent are usually printed directly on the label and do not require the use of any additional devices.

How to remove a particulate filter on a diesel

Diesel particulate filter housing without filter element

Depending on the design features, the filter can be removed in the following ways:

Often, car owners simply remove the particulate filter, since replacing it is very expensive.

Remove the filter filler without disassembling its body - simply crushing it with any suitable tool. The catalyst, for example, is sometimes "knocked out" with a crowbar.
Open the case and after "cleaning" brew it.
Make an insert from a suitable pipe - but this will require fitting flanges, which is more difficult than the previous two methods.

The most difficult thing in this procedure may be the subsequent “flashing” of the ECU - without changing the program, engine malfunctions are inevitable after the filter is removed.
The consequences of removing the particulate filter on a diesel engine are:

reducing the consumption of diesel fuel;
improvement of acceleration dynamics and engine thrust;
reducing the cost of maintaining a car;
possible fines, especially outside the Russian Federation.

In conclusion, we can say that environmentalists have taken to solving the problem with excess soot "from the wrong end." Additional costs associated with the service diesel units equipped with particulate filters fell on the shoulders of ordinary motorists. Although it would be more correct to achieve the production of better quality fuel without raising its cost. This is especially true for domestic oil refiners. More than 15 years ago, employees of one of the French laboratories, after analyzing Russian diesel fuel, concluded that this liquid is not diesel fuel at all.

On the cars with a diesel engine, a particulate filter has been used as part of the exhaust system since 2000. With the introduction of Euro 5 standards in January 2011, the use of a particulate filter on passenger cars with a diesel engine is mandatory.

Diesel particulate filter (in the English version of Diesel Particulate Filter, DPF, in the French version of Filtre a Particules, FAP, in German version RubPartikelFilter, RPF) is designed to reduce the emission of soot particles into the atmosphere with exhaust gases. The use of a filter makes it possible to reduce soot particles in exhaust gases by up to 99.9%.

In a diesel engine, soot is formed when fuel is not burned completely. Soot particles have a size of 10 nm to 1 µm. Each particle consists of a carbon core, to which hydrocarbons, metal oxides, sulfur and water are connected. The specific composition of soot is determined by the mode of operation of the engine and the composition of the fuel.

In the exhaust system, the particulate filter is located behind the catalytic converter. In a number of designs, the diesel particulate filter is combined with an oxidation-type catalytic converter and is located immediately after the exhaust manifold where the temperature of the exhaust gases is maximum. It's called a catalytic coated particulate filter.

The main structural element of the particulate filter is a matrix, which is made of ceramics (silicon carbide). The matrix is placed in a metal case. The ceramic matrix has a cellular structure consisting of channels of small cross section, alternately closed on one side and the other. The side walls of the channels have a porous structure and play the role of a filter.

In cross section, the cells of the matrix have a square shape. More perfect are the input cells of the octagonal shape. They have a larger surface area (compared to exit cells), allow more exhaust gases to pass through and provide longer term particulate filter service.

In the work of the particulate filter, two successive stages are distinguished: filtration and regeneration of soot. During filtration, soot particles are captured and deposited on the filter walls. Small soot particles (from 0.1 to 1 µm) are the most difficult to capture. Their share is small (up to 5%), but these are the most dangerous emissions for humans. Modern particulate filters retain these particles as well.

Soot particles accumulated during filtration create an obstacle for exhaust gases, which leads to a decrease in engine power. Therefore, periodically cleaning of the filter from accumulated soot or regeneration is required. A distinction is made between passive and active regeneration of the particulate filter. In modern filters, as a rule, passive and active regeneration are used.

Passive particulate filter regeneration is carried out due to the high temperature of the exhaust gases (about 600 ° C), which is achieved when the engine is running at maximum load. Another way of passive regeneration is the addition of special additives to the fuel, which ensure the combustion of soot at a lower temperature (450-500°C).

Under certain engine operating conditions (light load, urban driving, etc.), the exhaust gas temperature is not high enough and passive regeneration cannot occur. In this case, active (forced) regeneration of the particulate filter is carried out.

Active particulate filter regeneration It is carried out by forcibly raising the temperature of the exhaust gases for a certain period of time. The accumulated soot is oxidized (burns out). There are several ways to increase the temperature of the exhaust gases during active regeneration:

late fuel injection;
additional fuel injection on the exhaust stroke;
use of an electric heater in front of the particulate filter;
injection of a portion of fuel directly in front of the particulate filter;
heating of exhaust gases by microwaves.

The design of the particulate filter and the systems that ensure its operation are constantly being improved. Currently, the most popular particulate filter with a catalytic coating and particulate filter with a system for introducing additives into the fuel.

Particulate filter with catalytic coating

Diesel particulate filter with catalytic coating applied to automobiles Volkswagen Group and a number of other manufacturers. In the operation of a catalytic coated particulate filter, a distinction is made between active and passive regeneration.

During passive regeneration, soot is continuously oxidized due to the action of the catalyst (platinum) and the high temperature of the exhaust gases (350-500°C). The chain of chemical transformations during passive regeneration is as follows:

nitrogen oxides react with oxygen in the presence of a catalyst to form nitrogen dioxide;
nitrogen dioxide reacts with soot particles (carbon) to form nitric oxide and carbon monoxide;
nitric oxide and carbon monoxide react with oxygen to form nitrogen dioxide and carbon dioxide.

Active regeneration occurs at a temperature of 600-650°C, which is created using the diesel control system. The need for active regeneration is determined on the basis of an assessment of the capacity of the particulate filter, which is carried out using the following sensors of the diesel management system: air mass meter; exhaust gas temperature before the particulate filter; exhaust gas temperature after the particulate filter; pressure drop across the particulate filter.

Based on the electrical signals from the sensors, the electronic control unit performs an additional injection of fuel into the combustion chamber, and also reduces the air supply to the engine and stops the exhaust gas recirculation. In this case, the temperature of the exhaust gases rises to the value required for recirculation.

Diesel particulate filter with fuel additive system

The particulate filter with a system for introducing additives into the fuel is a development of the PSA concern (Peuqeot-Citroen). Since the pioneers in the use of additives for regeneration are the French, the name FAP filter (from the French Filtre a Particules) has stuck to the filter. A similar approach is implemented in particulate filters from other automakers (Ford, Toyota).

The system uses an additive containing cerium, which is added to the fuel and ensures the combustion of soot at a lower temperature (450-500°C). But even this exhaust gas temperature cannot always be reached, so the system periodically performs active regeneration of the particulate filter. The diesel particulate filter is usually installed separately after the catalytic converter.

The additive is stored in a separate tank with a capacity of 3-5 liters, which is enough for 80-120 thousand kilometers (filter service life). Structurally, the tank can be located in the fuel tank or outside it. The additive level in the tank is controlled by a float-type sensor. The additive is supplied to the fuel tank by means of an electric pump. Additive supply is carried out at each refueling fuel tank proportional to the amount of fuel supplied. The start and duration of the additive supply is regulated by the engine control unit (in some designs, a separate electronic unit).

A side effect of using the additive is that during combustion it settles in the form of ash on the filter walls and is not removed from it, which reduces the life of the device. The service life of a modern diesel particulate filter is 120,000 km. Manufacturers declare the release of a filter with a resource of 250,000 km in the near future.

Due to the high cost, exhausted particulate filters are usually not replaced by car owners, but removed with subsequent flashing of the engine management system.

exhaust cleanliness requirements automotive engines tightened annually. Auto manufacturers are constantly creating new systems to protect the environment. One of the devices of this plan was a particulate filter. So he was named for the fact that he completely removes soot and soot from the exhaust of a car.

What is a particulate filter used for?

The particulate filter is designed to clean the exhaust of the car from the remnants of unburned fuel, and most importantly to reduce the content of carbon monoxide in it. Its correct name is catalytic converter, or simpler catalyst. Its task, with the help of a chemical process - catalysis, is to convert toxic (poisonous) engine exhaust into components that are safer for nature and people. Many paid attention to the fact that drops of water drip from the exhaust pipe like from an air conditioner. It can be argued that the majority, looking at this, thought to themselves, and sometimes declared out loud, about the quality of our fuel. Like it gets a lot of water. However, it is not. The appearance of liquid indicates the high-quality work of the particulate filter - catalyst.

The basic principle of the particulate filter

As already mentioned, the particulate filter treats exhaust gases using catalysis reactions. Simply put, it converts harmful substances into steam, which, when condensed, turns into the same water and almost harmless exhaust. In the particulate filter, the process of this transformation is provided by three elements of the periodic table:

The presence of these rare and expensive components determines high cost particulate filter. It is these substances that, when reacting, turn unburned hydrocarbons from the CH series into ordinary H2O vapor, and CO turns dangerous carbon monoxide into useful carbon dioxide. Platinum and palladium work as oxidizing agents, while rhodium acts as a reducing agent. According to the number of active substances, this particulate filter is called a three-component one. A working diesel particulate filter reduces exhaust toxicity by up to 85%.

How the particulate filter works

The purpose of the catalyst indicates where the particulate filter is located. It is located in the exhaust system. Usually, car manufacturers try to install it just behind the exhaust manifold, as high temperatures improve the conversion processes. However, there is also a downside here. Proximity to the engine and temperature conditions lead to more rapid wear particulate filter. The neutralizer consists of three parts:

The basis of the particulate filter is the converter unit. It is performed in the form of a cylindrical (sometimes oval) block of the thinnest tubes. They resemble in their appearance from the end part, bee honeycombs. From the inside, these cells are just covered with catalytic components, thanks to which the exhaust is cleaned in them. On top of the block is covered with a special layer that retains heat. Naturally, except for the entrance and exit of the working tubes. All this is enclosed in a metal case of increased strength and heat resistance.

Attention! When the engine is running, the particulate filter in the process of catalysis heats up to 150-200 degrees. Therefore, extreme care should be taken when working with it, and allow it to cool properly.

Sometimes the catalyst is placed directly in front of the exhaust muffler-resonator. This arrangement allows you to extend the life of the particulate filter, but reduces its effectiveness.

Electronic monitoring of the particulate filter

Normal operation of the catalytic converter is possible only under the condition of high-quality fuel combustion in the combustion chambers. Combustion of this level can only provide fuel system engine equipped with an ECM ( Electronic system engine control), in which all processes are controlled by an electronic unit that works on data received from various sensors. The catalyst is also included in this scheme. Directly in front of the converter unit, a special sensor is built into the particulate filter housing. Its name is an oxygen sensor. Common nickname Lambda probe. The essence of his work is that, having a zirconium-platinum coating, when heated, it changes the resistance potential of the outer shell, depending on the degree of carbon monoxide content in the exhaust. If this content starts to go beyond the specified limits, the ECU reduces the opening time of the injectors and thereby reduces the fuel supply. And with a decrease in this indicator, it normalizes the process in reverse order.

Euro 2 and Euro 3 and 4 systems

The first cars with diesel particulate filters received the Euro classification. For the purity of exhaust gases according to European standards. However, after some time, the exhaust control system described above through an oxygen sensor was developed and implemented. The cleaning efficiency has become even higher. The service life of the particulate filter has increased. This system has already received the Euro-2 classification. Like a serial number.

But the disadvantage of the system was the possibility that when the diesel particulate filter failed or was removed, the ECU did not react in any way. Then the Euro-3 system was developed. The essence of the idea is as follows: another oxygen sensor was inserted into the system, after the neutralizer unit. It turned out that while the filter is working and everything is in order, the ECU sees the following picture: the resistance readings of the first sensor come in waves. The CO level changes all the time. At the same time, the readings of the second sensor are a flat line with slight fluctuations, that is, the filter performs its task. If the readings become the same, then the catalyst has crumbled or burned out and the ECU sharply reduces injection. If the particulate filter is clogged, then the reading line of the second sensor will become absolutely flat. But, however, when this happens, the driver will feel the changes without any sensors. Closed, in fact, exhaust pipe, this is a power drop of more than 50%. Well and in last years was adopted by the automotive industry as the basis for the Euro 4 standard. But the main condition for the transition to this standard is not structural changes in the car, but the transition of all filling stations to a new fuel standard. Many Internet articles importantly state that in order to switch a car to the Euro-4 standard, an operation is needed to install a special catalyst. Such a statement sounds at least strange. The point is that everything Russian cars, produced since 2005, are already equipped with a particulate filter, thus a catalytic converter. Another issue is that many owners have removed it. But the issue of removing this device from the exhaust system is the topic of a separate article and is not considered here.

Attention! Work to remove or replace the filter should be carried out only after consulting a specialist.

Possibility of failure of the particulate filter

Tubes for the converter unit are made of two types of material. There are ceramic honeycombs and metal ones. Ceramic honeycombs are more durable in operation, since during reactions their surface cannot interact with active substances. In addition, ceramics, unlike metal, tolerate high temperatures better. But at the same time, a particulate filter with a ceramic base is afraid of strong shocks and shocks, because this material is more fragile. So the main cause of the breakdown is the destruction of the neutralizing block.

In the ceramic version, it can crumble, and in the metal version it can burn out. On systems with a block located directly behind the exhaust manifold, this is a very unpleasant moment. Either fragments of ceramics fall down and clog the outlet of exhaust gases, or a metal block also falling, blocks the exhaust. The second option is clogging the working cells when using low quality fuel. And the last one is the production of all active elements on the inner surface of the cells. Most rare case, the destruction of the metal case. In all cases, it is required to carry out a set of works to replace or remove the particulate filter. But this issue is also worth considering a separate topic.

Particulate filter for diesel engines

Diesel fuel in composition, it is radically different from gasoline and the principle of operation of diesel engines is different from the operation of conventional gasoline internal combustion engines. Accordingly, the particulate filter, the catalytic converter of these engines, has a different structure from gasoline.

The diesel particulate filter is made of silicon carbide and titanium. The main task of the neutralizer here is not catalysis, but simple trapping and afterburning high temperatures accumulated soot particles. Such filters have been installed on diesel engines relatively recently, after the adoption environmental standards Euro 4 and Euro 5. Of the features of this system, one can name the self-cleaning of these neutralizers. Electronics provides for a system of forced afterburning of particles. When soot accumulates in the cells, a special valve is turned on, asynchronously supplying a small amount of additional fuel to the cylinders. Once in the honeycomb, this mixture heats up the particulate filter to a temperature of 500-700 degrees Celsius, forcibly burning out the soot deposits completely. On some models, an additional system for injecting a nitrogen mixture into the particulate filter is also installed. According to experts, diesel converters according to Euro-5 standards retain up to 95% of the emitted soot. But the topic of diesel engines should also be considered as the topic of a separate article, or even a series of articles.

Below you can see interesting video particulate filter operation:

Compliance with environmental standards often turns into additional problems for vehicle owners due to the complexity of the design of individual components and assemblies of the machine. In particular, particulate filters installed on modern diesel engines become clogged over time and quickly become unusable, due to which certain malfunctions appear in the operation of the machine. What to do in this case? There are two ways out: either remove the particulate filter or clean it, but for some reason many motorists choose the first option.

Why is the particulate filter removed

A heavily contaminated diesel particulate filter negatively affects the performance of the entire car, and what owner will like that his car has decreased traction, fuel consumption has noticeably increased, and besides, annoying control lights are constantly lit. Of course, you can solve the issue by replacing the part, but you will have to pay a fairly decent amount for this. In such a situation, the only reasonable way out, at least from the point of view of many motorists, is to completely remove the particulate filter from the car, but not everyone thinks about the possible consequences.

According to experts, the opinion that the extraction of this part has a positive effect on "well-being" iron horse- nothing more than a myth, because even despite temporary improvements in dynamics, problems will still appear over time.

Diesel particulate filter removal methods

There are two ways to remove a particulate filter from your car:by physically removing all components of the part, or by using software deactivation, which is a more competent approach to the issue.

In the first case, you need to get to the location of the DPF and, using a grinder, cut out the block with the filter element itself and the catalyst. After that, a special flame arrester is installed in their place or an ordinary piece of pipe is welded. Mounting a flame arrester allows you to increase the durability of the exhaust system, in particular, and the muffler. Moreover, thanks to this device, the engine power is significantly increased, and the exhaust sound becomes much quieter.

The software removal of a diesel particulate filter is considered a more humane method of dismantling a part. It is used when they want to avoid errors in the operation of the engine ECU, which is achieved by adding an exhaust temperature sensor and a lambda probe to a piece of welded metal pipe. Also, after removing the particulate filter, you will have to perform chip tuning of the car, which eliminates black combustion products.

After completing the specified procedure, you will notice a decrease in the "capriciousness" of the motor in terms of maintenance, although you will have to forget about the manufacturer's warranty. Station DPF Removal Procedure Maintenance it will cost about 25-30 thousand rubles, but it all depends on the complexity of the work and the location of the element itself.

What happens if you remove the filter

By removing the clogged filter from your vehicle, you, of course, will solve the problem with power and fuel consumption, but at the same time, some other inaccuracies in the car will appear. extraneous sounds when running power unit and incorrect display of the state of the part - these are just a few of them. The system will see that the diesel particulate filter is not clogged, which simply cannot be, then decides that it is simply faulty, and puts the car into "emergency" mode. To avoid all these nuances, you should reprogram (or, as people say, “reflash”) the control unit, otherwise the ECU will constantly generate fault codes. There are two main options for how to do this.

In the first case, take the “firmware” of the version of the vehicle on which the particulate filter was not installed and upload it to your control unit. However, no one can know for sure what is not yet in this firmware, and what consequences of removing the particulate filter will “come out” here. It is likely that the standard parameters of the car will not be able to "get along" with the new changes, as a result of which any other function that was not in the old program may stop working.

You can download the required firmware on the Internet, but in this case it will be impossible to predict the result at all. If such firmware works for some time, then no one will be able to guarantee its proper functioning after a year. Floating speed, an ever-shaking speedometer needle and uneven injection - not all possible consequences use of low quality software.

Most the best way Solving a software problem is installing programs that the manufacturer uses, but supplemented by some changes made by an experienced programmer. Such software is loaded into the chip control unit using a special device - a programmer.

Did you know? The particulate filter is the development of Peugeot, who installed the first ever particulate filter on their 607 car. model range 2000 year.

There is another way to avoid the problems associated with removing the particulate filter. You are required to install an emulator that would simulate the presence of a new particulate filter in the machine's system. Such electronic device sends signals identical to those of a real filter, thus deceiving the on-board computer.

Advantages and disadvantages of filter removal

Why remove the particulate filter, you have already learned, but you should always consider not only the advantages, but also the disadvantages of any action performed. The positive aspects of removing the particulate filter include:

increase in engine power and thrust (can be achieved by reducing the resistance in the exhaust pipe);

No need for expensive maintenance and filter cleaning;

Saving motor resources due to the lack of regeneration processes;

The absence of pop-up errors that are associated with the operation of the particulate filter.

As for the shortcomings, there are not so many of them. The main one is that the car ceases to comply with Euro-4 / Euro-5 standards, which means that the vehicle will no longer pass the technical inspection, at least without additional material costs. True, if you look at the problem from the other side, then this nuance will not be so significant, especially in comparison with the cost of the part replacement procedure. Don't forget the above technical problems associated with the absence of a particulate filter, which appear as a result of its removal from the vehicle.