Diesel particulate filter in the car. Particulate filter: cannot be cut out. The opinion of a specialist. How to clean the DPF particulate filter

Diesel engines began to be equipped with particulate filters back in 2000. At that time, there were no such tough environmental requirements as today, and not all manufacturers applied them, relying more on engine output than on caring for nature. When Euro 5 standards were adopted in January 2011, the particulate filter became a mandatory attribute of the exhaust system of a diesel car. Today we will try to figure out what kind of unit it is, what it serves for, how long it serves, and how to deal with it at the end of its service life.

As the name suggests, the DPF is designed to minimize soot emissions along with exhaust gases. Soot is formed as a result of incomplete combustion of diesel fuel, and often particulate filters trap up to 99.9% of the soot. A simple example, remember the exhaust color of an old, battered diesel from 1988, and what the exhaust looks like from the latest generation with a three-liter TDI engine.

This filter in the exhaust system of a car can be installed behind the catalytic converter, or it can be combined with it in one housing.

"Soot", as the people call it, is most often a ceramic block with through cells of a square cross-section, in which soot particles are retained. Sooner or later, soot particles simply clog the filter honeycombs and thereby prevent exhaust gases from escaping, which creates high pressure in the exhaust manifold, which reduces power and impairs cylinder head purging, so the diesel particulate filter needs periodic cleaning or regeneration.

There are two types of regeneration of the particulate filter: active and passive.

Passive regeneration is carried out by raising the exhaust gas temperature to 600 ° C, at maximum engine loads. In other words, by simply burning off the soot from the filter. But there is another, safer way, when a special additive is added to diesel fuel, which ensures the combustion of soot at a lower temperature, which will be around 450 - 500 ° С.

But there are nuances in which passive regeneration with an increase in the exhaust temperature cannot be carried out, and in this case, active regeneration of the particulate filter is used.

The principle of active regeneration is the same - burning, but it is carried out by professionals using specialized equipment, and there are several ways for this: heating the exhaust gases with microwaves, fuel injection or using an electric heater in front of the particulate filter, or late fuel injection into the combustion chamber.

This procedure can ensure the correct operation of the particulate filter for a long time, until the very honeycomb of the filter begins to deteriorate.

In cases where the "soot" is combined in the same housing with a catalytic converter, passive regeneration is much easier, since the oxidation of soot in the filter occurs continuously due to the action of the catalyst, and the temperature of the exhaust gases is lower, in the region of 350-500 ° C ... Active regeneration is also simplified. It is produced at a temperature of about 600 ° C, and this temperature is provided by the electronic engine control system. The electronics will also say about the need to regenerate, which, having monitored the state of the particulate filter according to the sensor data, and evaluating its throughput, will issue a conclusion on its operability.

There is one more cleaning method, on the one hand it is simpler, on the other more complicated. This is when the filter is simply removed from the car and washed with special flushing fluids. This happens by muffling one of the filter nozzles, and through the other prophylactic chemicals are poured, after which it is left in an upright position for 12 hours and periodically shaken. After the allotted time, the liquid is washed off, and the filter itself is washed with warm water.

A diesel engine is more sensitive to fuel quality than a gasoline engine. Refueling with low-quality diesel fuel with a high sulfur content can lead to the release of a large amount of soot, and the particulate filter simply will not have time to burn it out and eventually clog. Problems can also arise due to the low temperature of the exhaust gases, because of which the filter will simply not burn out the soot. Also, the DPF has its own service life, and usually it is about 200,000 km, but this figure can be influenced by many factors, such as driving style, fuel quality and operating conditions. In Russian conditions, the resource is usually 100-120,000 km.

Replacing the unit will be very expensive, and most often, by the time the particulate filter fails, most cars have already lost the manufacturer's factory warranty, so they often use the simplest way to solve the problem of a failed filter - it is physically removed from software shutdown.

Such a stroke will have a beneficial effect on the condition and service life of the diesel engine, since the load on the connecting rod - piston group will decrease, but the ecology will suffer, since everything that was previously left in the filter will go into the atmosphere. And if on trucks or SUVs, living mostly on highways and winter roads, this is not a big problem, then for cars that live mostly in the city this can already be a serious problem, since driving behind such a car in city traffic is not the most pleasant than you can end your working day.

Best regards, Andrey Chervyakov.

In 2004, Euro-4 standards were introduced in Europe, according to which the presence of a particulate filter is mandatory in all new cars. The element itself has been used in the exhaust systems of cars since 2001, but then only a few manufacturers installed it. So what is a diesel particulate filter, what is it for? Let's define the purpose of this element, its work and try to understand why many car owners remove it from the system altogether.

What is a diesel particulate filter?

It is an element of the vehicle's exhaust system that reduces the emission of soot particles into the atmosphere. Its use reduces the soot content in exhaust gases by 80-100%. In the struggle for a cleaner environment, all cars made in Europe must be equipped with a similar filter since 2004.

Depending on the design, this device can be a separate element of the exhaust system, or it can be connected to a catalytic converter, although this does not change the principle.

Work

The particulate filter operates in two sequential stages: filtering the soot and then regenerating it. During filtration, soot settles on the walls, and the cleaned exhaust gases are released into the atmosphere. In this case, particles with a size of 0.1-1 microns can pass through the filter. Their share is about 5% of the total. However, it is they who are dangerous for humans.

Trapped soot particles can obstruct the flow of exhaust gases, causing engine power to drop. Therefore, the particulate filter is periodically regenerated. The regeneration process can take place in different ways, depending on the design provided by the manufacturer. Now that we understand that this is a diesel particulate filter, we can take a closer look at the issue of regeneration.

What is catalytic coating?

The filter, if combined with a catalytic converter, has a catalytic coating. Similar devices are used on cars of the Volkswagen brand and other foreign manufacturers. They are installed behind the exhaust manifold, not far from the engine - in a place where the exhaust gas temperature is practically maximum.

The main structural element of this filter is a matrix made of ceramics. It has a peculiar cellular structure, which consists of small-section channels, alternately closed on both sides. The walls of the channels are porous and act as a filter. Titanium is applied to the surface of the walls, which acts as a catalyst. All this matrix fits into the case.

When the exhaust gases pass through this filter, most of the soot particles are retained on the walls of the matrix, and the titanium catalyst promotes the oxidation of hydrocarbons that have not been burned in the engine's combustion chamber.

Active and passive regeneration

As you know, regeneration of the particulate filter can be active or passive. In the latter, the oxidation of soot occurs continuously due to the high temperature and the action of the catalyst. With passive regeneration, the chain of formations looks like this:

1. Nitrogen oxides react with oxygen to form nitrogen dioxides.
2. The newly formed substance then reacts with soot (carbon) to form carbon monoxide and nitric oxide.
3. Carbon monoxide and nitric oxide interact with oxygen to produce nitrogen dioxide and carbon dioxide.

If the engine is running at low rpm, then the gas temperature will be low, due to which passive regeneration does not occur. In this case, forced or active regeneration will be carried out. It is carried out at a temperature of 600-650 degrees. These temperatures are achieved using the engine management system. At this temperature, the soot burns out, that is, reacts with oxygen with the subsequent formation of carbon dioxide.

System sensors

To operate the particulate filter in a Mercedes or other cars, there are entire control systems and sensors:

1. Air mass meter.
2. Particulate filter pressure sensor.
3. Gas temperature sensor before and after the particulate filter.

Based on the results obtained, the computer automatically injects additional volumes of fuel into the combustion chamber, reduces air supply and even stops exhaust gas recirculation. All this leads to an increase in the exhaust temperature to a value at which regeneration can be carried out.

Automatic regeneration

Concerns Peugeot and Citroen have developed a filter with automatic regeneration. They are installed separately from the catalytic converter. This design uses a regeneration method, which is based on the injection of special additives into the fuel that increase the temperature of the exhaust gases. The same method is implemented in filters from other manufacturers (Ford or Toyota, for example).

Here it works as follows: when the filter is filled to the maximum with soot particles, the system automatically injects a special additive containing cerium into the fuel. This element generates a large amount of heat when burned.

The additive can be injected several times by a computer signal. The first injection is carried out during the fuel injection cycle. In this case, the exhaust gases are heated to a high temperature and heat the filter matrix to 700 degrees. Then the additives are injected at the gas exhaust stroke. In this case, the cerium does not burn, but enters the particulate filter together with the gases. On contact with a red-hot matrix, fuel with cerium ignites, and the temperature reaches 1000 degrees. This burns the soot and thus regenerates the filter. Note that although the temperature is very high here, the destruction of the matrix and the filter itself does not occur.

The additive itself with cerium is stored in a separate container. One refueling will last on average for several years of operation (about 80,000 mileage). Usually, a diesel particulate filter, the price of which is high and varies in the range of 20-100 thousand rubles (depending on the model), is resistant to the use of low-quality fuel, however, in this case, the consumption of the additive may be increased due to the large formation of soot.

Particulate filter removal and consequences on diesel

These devices fail quite often. Given their high cost, some car owners are reluctant to pay money for them. And why, if the car drives normally without them? For example, on Renault cars, diesel with soot sediment often leads to a malfunction of this system, due to which the engine power and thrust decrease, the oil level in the engine rises, and even a hissing sound from the engine is possible. This is due to the fact that the exhaust gases will hardly pass through the system. In this case, the computer will register a permanent error and limit the engine operation (up to 3000 rpm).

Many technicians at the service station physically remove the filter and flash the "brains" of the car. Removing the particulate filter results in normal engine operation on the diesel engine. Yes, the exhaust gases will contain a large amount of soot, which is harmful to the environment, but this is of little concern. However, after deletion, the car's firmware will also be required, otherwise there will be a "check" error on the dashboard.

However, at the same service stations they know how to clean a particulate filter. But this service costs money and only helps for a while.

Malfunction symptoms

As already mentioned, if this filter is faulty, some motors stop working at full power. The car automatically turns off the turbocharger, puts the engine in emergency operation mode, in which it is impossible to raise the rotation speed above 3000 rpm. Also, the car will consume more fuel, traction will decrease significantly, the engine oil level will be higher than the initial one, and the famous Check error will appear on the dashboard. All these are typical symptoms of a malfunction of this module.

Fortunately, there is nothing wrong with that. As you already understood, it can be easily removed without harm to the engine or any of its systems. There is only harm to the environment and people passing by.

Finally

Many car owners remove these unnecessary settings from their vehicles and drive successfully without damaging the engine. Now you know what a diesel particulate filter is and how it works. And if it does not work on your car and even harms the motor, then you can safely remove it. Fortunately, today this service is offered at many service stations. In particular, this device can be removed from Nissan, Mercedes, Peugeot, Mazda, Renault cars. Diesel will not become less effective during the further operation of the machine. On the contrary, even an increase in power is possible.

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 clog over time and quickly deteriorate, which is why 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 remove the particulate filter

A heavily soiled particulate filter negatively affects the performance of the entire car, but which owner likes that his car has decreased traction, fuel consumption has increased significantly, and besides, annoying control lamps are constantly on. Of course, you can solve the issue by replacing the part, but you will need 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 favorably affects the "well-being" of the iron horse is 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 the particulate filter from your vehicle:by physically removing all components of the part, or by software deactivation, which is a more competent approach to the issue.

In the first case, you need to get to the DPF location and use a grinder to 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. The installation of a flame arrester can 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 programmed removal of the diesel particulate filter is considered a more humane method of dismantling the 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 will eliminate the 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. The procedure for removing DPF at a service station 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 a clogged filter from your vehicle, of course, you will solve the problem with power and fuel consumption, but at the same time, there will be some other inaccuracies in the operation of the car. Extraneous sounds when the power unit is running and incorrect display of the state of the part are just a few of them. The system will see that the particulate filter is not clogged, and this simply cannot be, then it decides that it is simply faulty and puts the car into "emergency" mode. To avoid all these nuances, you should reprogram (or, as the people say, "reflash") the control unit, otherwise the ECU will constantly issue fault codes. There are two main options for how you can do this.

In the first case, take the firmware of the version of the vehicle, on which the particulate filter was not installed, and load it into 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 a firmware works for some time, then no one can guarantee its correct functioning after a year. Floating revs, the ever-shaking speedometer needle and uneven injection are far from all the possible consequences of using poor-quality software.

The best solution to a software problem is to install programs that are used by the manufacturer, but supplemented by some changes made by an experienced programmer. Such software is loaded into the chip-control unit by means of a special device - a programmer.

Did you know? The diesel particulate filter is the development of Peugeot experts who installed the first ever DPF in their 2000 model 607 car.

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 car system. Such an electronic device sends signals that are identical to those of a real filter, thus tricking the on-board computer.

Advantages and Disadvantages of Filter Removal

You have already learned why you need to remove the particulate filter, 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:

an increase in engine power and thrust (this is achieved due to a decrease in resistance in the exhaust pipe);

No need for expensive maintenance and filter cleaning;

Saving motor resources due to the absence of regeneration processes;

No pop-up errors associated with the operation of the particulate filter.

As for the shortcomings, there are not so many of them. The main one - the car ceases to comply with the Euro-4 / Euro-5 standards, which means that the car will not pass the technical inspection, at least without additional material expenditures. 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. Do not forget about the above-described technical problems associated with the absence of a particulate filter, which appear as a result of its removal from the vehicle.

When a diesel engine is running, as a rule, there is no complete combustion of the fuel. As a result, together with the exhaust (exhaust) gases, components harmful to humans and the environment, including soot, enter the atmosphere. To reduce the concentration of the latter, a particulate filter is used. In English. option - Diesel Particulate Filter (DPF).

Design and arrangement in the system

The particulate filter belongs to the exhaust system and can be located next to or combined with it into a single structure (in this case, it is located near the exhaust manifold, which ensures gas filtration at maximum temperature). The device is used only in cars running on diesel fuel, and, unlike the catalyst, which is installed on gasoline engines, it cleans the exhaust exclusively from soot particles.

Particulate filter

Structurally, the particulate filter consists of the following elements:

• Matrix. It is made of silicon carbide (ceramics) and is a system of thin channels with a square or octagonal section. The ends of the passages are alternately closed, and the walls have a porous structure, due to which the soot is retained inside and settles on the walls.
• Frame. Made of metal. Has an input and output channel.
• Pressure measurement sensors (differential inlet and outlet).
• Inlet and outlet temperature sensor.

Features of the work and operation of the particulate filter

Passing through the particulate filter, impurities settle on the walls of the matrix, as a result of which purified gases are formed at the outlet. Gradually, the filter cells fill and clog, obstructing the passage of exhaust gases. This leads to a decrease in engine power, which indicates the need for cleaning or replacement.

The service life of the particulate filter depends on the operating conditions of the vehicle. On average, manufacturers recommend performing a condition check every 100,000 kilometers. The real range of filter contamination is from 50 to 200 thousand kilometers. To extend the service life, it is necessary to regularly regenerate and change the engine oil in a timely manner.

Types and tasks of regeneration

Diesel particulate filter regeneration is a procedure for burning soot that settles in the matrix. There are two types of regeneration:

• Passive - carried out by increasing the temperature of the exhaust gases. This can be realized by accelerating the engine to maximum load (about 15 minutes of driving at 3000 rpm or more) or by adding additives to diesel fuel that reduce the combustion temperature of soot.
• Active - performed when the main mode of engine operation does not provide the required parameters for passive regeneration. For this, a forced increase in temperature is performed for a while. The temperature rise is achieved in various ways - due to late or additional injection at the exhaust stroke, an electric heater or additional fuel additives.

Frequent piercing will wear out the ceramic matrix and lead to its destruction. And since the cost of a particulate filter is quite high, it is necessary to find the most gentle mode. It is achieved by increasing the amount of distance traveled between regeneration procedures, as well as reducing the temperature ranges of oil combustion.

The choice of oil for diesel

Unsuitable oil provokes additional contamination of the filter matrix cells and pre-wear. When the engine is running, it burns along with the fuel and, in the presence of incombustible sediment, blocks the operation of the exhaust gas cleaning system.

For diesel engines with particulate filters, ACEA (the Association of European Automobile Manufacturers) has established a certain oil standard that meets environmental standards not lower than Euro-4 and the rules for operating cars in general. Engine oils for modern diesel particulate filters that have ACEA approval have received the C mark (C1, C2, C3, C4). They are used for vehicles with exhaust cleaning systems, and their composition allows to extend the life of the matrix.

Is it possible to remove the particulate filter

Many motorists, wanting to get rid of the problem of constant cleaning and replacement and the additional financial costs associated with them, decide to remove the particulate filter. This can be done in several ways:

• Dismantling the device. Mechanical removal of the particulate filter allows for a slight increase in vehicle performance. On the other hand, when the machine is in operation, the engine ECU will start to generate an error, perceiving the lack of a filter as a malfunction.
• Making adjustments to the engine ECU software (updating the program to a version that does not contain information on connecting the particulate filter). Updating the software is carried out by a special device - a programmer, but at the same time it is necessary to be sure that the new firmware is working correctly, since the consequences can be unpredictable.
• Connecting a device emulator (without changing the factory program), which sends signals to the ECU similar to the operation of a real particulate filter.

However, it should be borne in mind that the currently established environmental standards Euro-5 prohibit the operation of a car with a diesel engine without a particulate filter.

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

New particulate filter
Particulate filter after use

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

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

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

Currently, there are two types of soot cleaners used in cars:

Diesel Particulate Filter DPF (an abbreviation for Diesel Particulate Filte) for diesel cars traps soot particles up to 1 micron in size, which are formed as a result of fuel combustion. Such a filter is distinguished by the simplicity of the device, but at the same time it requires regular cleaning (regeneration) actions.

A filter type FAP (short for the French expression Filtre A Particules) is a more complex device that does not require regular intervention. Regeneration (purification) occurs here in automatic mode.

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

This is the place where the flue gases have their highest temperature. In this embodiment, the device is referred to as a "catalytic coated particulate filter".

The average service life 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 the owners and workers of car services, this figure is reduced by almost three times.

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

1. Full replacing the particulate filter... A very expensive undertaking. Of course, the price very much depends on the make and model of the car, but in any case, this action is much more expensive than all of the items listed below. For example, at a BMW it will cost you around 1,500 euros to replace a particulate filter.
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 on-board computer procedures are tied to the data received from the particulate filter sensors, 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 alarms of indication, other problems with the on-board computer).
3. Deception of the DPF sensor. It consists in installing a separate device that emulates the normal operation of sensors (falsifies signals) or software removal of the particulate filter from the electronic control unit system. This procedure does not relieve the car owner 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 removing 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 in accordance with 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

Regeneration types - cleaning methods

In fact, a particulate filter is a container filled with a substance with a porous structure (most often ceramics are used). When the exhaust gases pass through these "honeycombs", soot and fumes are deposited 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 malfunctions increases.

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

1. Active. Pore ​​cleansing occurs by increasing the temperature inside the filter to 600-1000 degrees Celsius. At this temperature, the soot completely burns out.
2. Passive. Here, the removal of soot also occurs due to its combustion, but combustion proceeds at a temperature of about 350 ° C (this is the normal temperature of diesel exhaust gases). To oxidize soot, you need a special catalyst that lowers the reaction temperature - for example, platinum in Volkswagen filters (the same catalytic coated particulate filters that were mentioned earlier).

Active regeneration requires special procedures on the part of the car owner, while passive regeneration takes place without any involvement of the car driver.

If regeneration does not have the desired effect, you can always simply rinse the filter. Flushing the particulate filter is 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 regeneration of the particulate filter

You can increase the temperature inside the particulate filter for complete combustion of soot in one of the following ways (active regeneration):

1. The introduction of special additives (most often based on cerium) into the fuel mixture, 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 procedure for the engine operation through the electronic control unit of the car. In this case, the air supply is reduced, the fuel is injected at 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 diesel particulate filter repair.

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

The regeneration procedure is started most often without user intervention:

1. The sensor for an increase in the soot level 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 the cleaning attempts are unsuccessful, or the soot level is critical, 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 (EBP) and follow the instructions of the system (if the automatic speed control mode is not supported).

It all depends on the car model and the EBP firmware. In some cases, knowledge of service codes or connection of external diagnostic devices may be required.

What liquid will help to regenerate the diesel particulate filter

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

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

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 an original additive is used in the car (for automatic feeding from a special tank in the diesel particulate filter regeneration mode), then it should be ordered from authorized dealers.