STP® Cleaner particulate filter for diesel engines designed to remove soot and carbon particles from particulate filters diesel engines. One application is sufficient to clean and restore the particulate filter and remove accumulated unburnt soot. Ideal when driving with frequent stops/ starts, for example, in the city, for cars in driving schools and taxis. All cars with diesel engines manufactured after 2009 are equipped with particulate filters. Like most filters, particulate filters require regular cleaning. Otherwise, it may become clogged, as indicated by the indicator light. Most often, this is the reason for contacting the service. Instead, we recommend using the special additive STP® Diesel Particulate Filter Cleaner for diesel engines. It is best to use the additive every 3000 km as a preventive measure.

Application

Just add to fuel tank every 3000 km.

Is it safe for my car

STP® Diesel Particulate Filter Cleaner is suitable for diesel engines with a factory-fitted or aftermarket particulate filter. Not recommended for heavy trucks, which use constant regeneration of the particulate filter.

Note!

Cleans and protects the particulate filter. At the same time, it helps to avoid its replacement and significant financial costs.

Soot is a by-product of burning out the fuel mixture, and its volume in the exhaust directly depends on the proportions of fuel and air. The particulate filter gets in the way of soot. It traps up to 95% of harmful emissions - does not release them outside and burns them. Excessive clogging of this part leads to a decrease in vehicle power.

Why does the particulate filter become clogged?

When driving, the filter gradually becomes clogged. This process is monitored by special sensors. Automatic regeneration can destroy accumulated soot by burning it off, but this only occurs when driving long distances. As a result of the additional supply of the fuel mixture, the temperature in the filter reaches 700 degrees, which helps to completely burn out the accumulated soot.

If you drive only within city limits, partial burning of pollution will occur, which does not solve the problem. The filter continues to clog.

Over time, it becomes critical - you have to change the element, which can cost 800 euros. By the way, wear is “promoted” by the use of low-quality gasoline. Driving with a clogged filter leads to the fact that regeneration is activated systematically, but complete burning of soot does not occur due to its large amount. Moreover, the system becomes clogged even faster, since due to the too frequent start of the regenerative process, the fuel does not burn out completely. The remaining substances end up in the exhaust.

Some of the unburnt mixture may end up in the oil, deteriorating its quality. Excessive pressure raises the oil level - it will eventually end up in the intercooler. Too high pressure can “kill” the motor. This is why the filter system needs to be washed from time to time using a special cleaner.

Signs of a clogged particulate filter

The following symptoms indicate critical clogging of the filter system:

• increased fuel consumption;
• high level oils in the system;
• thrust decreases (as indicated by instrument readings);
• on Idling the motor is unstable;
• when the internal combustion engine is turned on, suspicious noises (hissing) are heard;
• from exhaust pipe too much smoke comes out.

On a diesel engine, the signs of critical blockage are the same. By the way, the degree of contamination is determined by the electronics, so errors can be generated even in the absence of severe blockage.

Benefits of Regular Maintenance

The resource of the soot depends on the number of regeneration cycles initiated by the electronics. Frequent cleaning may cause the platinum layer of the catalyst to completely burn out due to too much high temperatures. The main advantage of regular diagnostics and cleaning is saving money on installing a new filter device.

When driving in extreme conditions soot is formed more actively. Preventive cleaning will help avoid replacing the unit. In addition, a car with pure soot consumes less fuel, its motor is more powerful. Is it worth talking about a significant reduction in harmful impurities in the atmosphere? In general, regular maintenance helps increase the resource of the node and makes it more reliable.

The particulate filter must be cleaned during Maintenance. This is the only way to avoid the accumulation of excessive amounts of soot deposits. There is another way to extend the life of the filter device - use additives. They help reduce soot formation activity and reduce the temperature that occurs during the regeneration process.

There are additives that are added to diesel fuel so that it burns out completely. This leads to a reduction in soot emissions into the system. When using additives, it is not necessary to clean the soot often - but sometimes it is still necessary to check.

How to clean the particulate filter

The company's cleaning products are considered high quality Liqui Moly, but they are expensive. The product helps reduce the formation of soot. It is suitable for diesel vehicles. Constant use of cleaning additives will increase the filter life.

Another effective remedy- Diesel Partikelfilter Schutz. One package is enough for 2,000 km. This substance is added to the fuel tank before adding fuel. It is not recommended to use Diesel Partikelfilter Schutz together with other products. 75 liters of fuel require 1 bottle.

JLM too quality product for washing soot. If you add it every 10,000 km, it can completely restore the functionality of the element. JLM can be used on any car.

The Russian remedy is “Security”. According to the manufacturer, it can reliably protect the DPF from clogging. The norm is 1 bottle per 10,000 km. The substance is added to the fuel tank. The cleaning process starts while the vehicle is moving. There is no negative impact on the elements of the fuel and exhaust systems. The use of the "Protection" product leads to a significant reduction in exhaust toxicity.

Do-it-yourself diesel particulate filter cleaning

Washing the particulate filter diesel engine(as well as gasoline engine) are produced in 2 ways:

• without dismantling the device;
• after dismantling.

To clean the unit yourself, remove it. The procedure is quite troublesome - it takes 8 hours. We remove the filter device and fill its housing with flushing agent. Cleaning liquid is usually sold in 5 liter canisters. One procedure takes up to 4 liters. We pour the product through the hose that comes with the canister.

When filling the filter, the substance begins to dissolve soot deposits. The desired effect can be expected after the liquid has been inside the case for 8 hours. Do not neglect to read the instructions before using the product, as it describes the dosage.

After 8 hours, the soot deposits are separated and removed with a pressurized water jet. Then the soot is put in place.

Some drivers think that chemical cleaners can be dangerous for the catalyst, but this is not the case. Modern additives contain safe elements that only destroy soot.

Remember the platinum layer covering inner part soot It is quite fragile, and excessive exposure to it is unacceptable.

Washing the particulate filter without dismantling

The work will be completed faster if you do not remove the device. This is made possible thanks to temperature sensor. After unscrewing it, a hole appears through which you can pour flushing fluid.

Do not forget about safety precautions - remember that the liquid can ignite. The product is applied into the hole using a gun or probe.

Here's how to proceed:

1. We warm up the engine.
2. Pour a liter of liquid into the hole and leave for 15 minutes.
3. We connect the gun to the probe.
4. We insert the probe into the hole.

Spraying the liquid takes 10 minutes. Then we stop the procedure for 10 minutes, then resume.

There should be 4 or 5 ten-minute cycles (cleaning-stop). For better spraying of the composition, it is recommended to scroll and move the probe back and forth during the cleaning process. After the procedures, pour rinse aid (0.5 liters) into the system, which is needed to neutralize residues active substance

. We rinse with a sprayer at the same time intervals.

Upon completion of work, screw the sensor into place and warm up the engine to operating temperature. Then we start the regeneration process, which will destroy the remaining soot deposits. The duration of the process is 15 minutes. Natural soot burning begins after the engine has been running at medium speed for some time (15-20 minutes).

The process may not start naturally due to problems with the electronics. In this case, you need to run it yourself using a diagnostic scanner. Cleaning methods have their pros and cons, but it is better to dismantle the device. And it doesn't depend on what power unit

Modern diesel cars have many constructive solutions for cleaning engine exhaust gases. These include, and one of the solutions is the widespread installation of DPF particulate filters. During active use, such a filter can quickly fail under certain conditions.

The main task of the filter element is to trap soot. The next step is to burn out the accumulated soot deposits in such a way as to minimize damage to the environment. At the very beginning, the filter collects soot up to a certain point. This moment is determined by the difference in pressure before and after the element. When the pressure deviates from the permissible limit and the filter capacity does not allow further efficient passage of exhaust gases, the diesel engine activates the appropriate mode to burn out the accumulated soot.

Afterburning of soot on a diesel engine is activated when different conditions, which are individually specified by the manufacturer of a particular model. These conditions are summarized by the fact that a diesel engine must have an average or high frequency rotation and being in motion. The ECU gives a command to increase the amount of fuel at the time of injection. The result is an increase in temperature exhaust gases at the exit. With such an increase in temperature, the soot burns out. If the car is driven in an urban area with short trips at low speeds, constantly warms up in winter and sits idle for a long time in traffic jams, then the particulate filter self-cleaning mode is simply not activated. Constant exposure to such conditions leads to rapid clogging of the element.

Soot actively accumulates and clogs the filter element. Once the flow rate is reduced by 9/10, exhaust gas resistance will result in loss of power and . This malfunction, which is associated with actual blockage exhaust system, can affect both new cars and those with high mileage.

The service life of the particulate filter directly depends on a number of factors and the individual operating conditions of the vehicle. A critically clogged element needs to be replaced. It is worth noting that the cost of quality new part quite high. For this reason, the question of how to clean the diesel particulate filter has become acute.

Read in this article

Why does the particulate filter become clogged?

The pollution process begins as a result of combustion in the cylinders of a diesel engine. A by-product of combustion of a mixture of diesel fuel and air is soot. This soot does not cause any particular harm to the filter, since it is a fine powder. During filtration, these particles are simply retained on the mesh.

The problem arises due to the presence of hydrocarbon particles in the exhaust that were not burned in the working chamber. Hydrocarbons lead to the active formation of resinous deposits. Soot microparticles are literally glued together with resin, resulting in accelerated formation of carbon deposits. Carbon deposits also contain components in the form of metal sulfates, which are formed after the combustion of oil that has entered the cylinders.

Sulfates appear in the exhaust due to the fact that metal-containing additives are included in the basic composition of the additive package for diesel oils. This is especially true for universal motor oils, which can be used equally for both diesel and . The result is that the diesel self-cleaning system is unable to remove dense deposits on the particulate filter.

Benefits of regular maintenance, cleaning and rinsing

Liquids are made from petroleum components and are often packaged in 5-liter cans. Average consumption For high-quality washing One particulate filter contains at least 4 liters of composition. Moreover, the canister may have a special neck in advance, since you will then need to connect a hose. Canister options are also available, equipped with a ready-made hose.

Operating principle flushing fluid is based on the fact that the composition effectively dissolves resins (keeps for about 8 hours), on which the resulting carbon deposits are held. It is necessary to carefully follow the requirements of the fluid manufacturer, since it is very important to wait the necessary time for the full effect of washing on the soot.

Next, the released soot is simply washed off with a regular stream of clean water under pressure, which is applied to the filter. After this, the filter is dried and put in place. The resin solvent itself is petroleum-based, can be easily washed with water, and does not harm the structure of the catalyst.

Washing with removal allows use only special liquids, which have an effect on resins at the molecular level. The use of other means is strictly prohibited, as the matrix inside the filter has a fragile platinum layer. After washing, the cleaning effect is monitored visually. Often this method ensures complete and most effective cleaning of the filtration element.

Washing on a car without removing the filter

The second method is to wash the particulate filter without removing it, which means carrying out the work directly on the car. Filter part diesel car equipped with pressure and/or temperature sensors. If you unscrew the sensor, then it becomes possible to supply flushing fluid.

Since washing is carried out on a car, manufacturers take into account possible risk ignition of the flushing composition. In such conditions, it is no longer possible to use petroleum products. For cleaning, water-alkaline solutions paired with washing liquid are recommended. This liquid neutralizes harmful alkali after the solution has completed the cleaning process. Liquid is supplied to the element body using a gun specially designed for this purpose. A straight or curved probe is also used, and a spray nozzle is additionally provided.

A set of liquids, a gun, sprayers and probes allow you to work with almost any model of diesel car equipped with a particulate filter. Cleaning using this method involves a step-by-step dosed supply of the cleaner through the sensor hole. The most commonly used installation location is the pressure sensor, which is located in front of the element. The car is warmed up in advance, then the filter is allowed to cool to approximately 40 degrees Celsius. The fact is that alkaline cleaning composition is most effective at this temperature.

For cleaning, you will need about 1 liter of liquid, which is left in the element body for 15 minutes. Spray gun high pressure connected to a straight or curved probe, which is inserted into the sensor hole. The cleaner is sprayed intermittently (up to 10 seconds spray, up to 10 seconds pause) directly onto the surface of the particulate filter. Operating pressure when spraying should be about 8 bar. It is advisable to rotate the probe during the spraying process, as well as move it back and forth to achieve best quality applying cleaning liquid to the matrix of the filter element.

Next, a rinse aid is sprayed in the same way, which neutralizes and washes away the cleaner. You will need about 500 ml. cleaning composition. Washing occurs using the same spray gun; similar pause time intervals are observed between spray stages. Thanks to this approach, the soot is distributed over the surface of the matrix more evenly. The result will be that the soot can be burned much more efficiently during the automatic self-cleaning process.

Upon completion, the pressure sensor is installed back in place, the diesel engine starts and warms up. After this, you will need to start the self-cleaning mode in order to burn through the soot particles freed from the bonding resins. This can be done either “naturally” or forcefully. In the first case, you will need to actively operate the diesel engine on the move for about 20 minutes at medium and high speeds in order to independently initiate the start of the particulate filter regeneration process.

If this is not possible or the automatic start of self-cleaning does not occur due to malfunctions in the diesel electronics, then the mode is forced to be activated. This is done using a diagnostic scanner. Diagnostic equipment will also allow you to evaluate the quality of cleaning the particulate filter from carbon deposits. To do this you need to compare the readings bandwidth element before and after using the wash.

Quick self-cleaning

Today, there is also the option of packaging flushing liquids in aerosol cans, which eliminates the need to use a spray gun. Additionally, the need to spray a wash-rinse aid may be eliminated, which depends on the specific manufacturer of the liquid and the composition of the proposed cleaner.

Using such solutions is extremely simple, which can be appreciated by using the example of washing a particulate filter without removing the filter element from Pro-Tec. The DPF Catalyst Cleaner product is a 400ml can of foaming particulate filter cleaner that also comes with a flexible wand. This amount is enough to completely clean one element, regardless of the degree of contamination. The product can be used to clean particulate filters of any generation.

• Before use, the can must be shaken for at least one minute;
• Next, the pressure sensor is removed, providing access through the hole;
• Then the diesel engine is warmed up a little and then the engine is turned off;
• The next step is to insert the probe and spray the cleaning agent;
• You do not need to spray the cleaner immediately, but in several approaches (5 seconds spray, 5 seconds pause);
• The procedure continues until foam appears visible in the sensor hole;
• Afterwards, the spray probe must be removed, replacing the removed sensor;

Before the first launch diesel engine After cleaning, the manufacturer also recommends adding an additive to diesel fuel called Super Clean. The composition is poured directly into the car’s fuel tank in accordance with the dosage indicated on the packaging. As you can see, additional washing of the filter itself after cleaning is not required.

How to best clean the particulate filter

Each of the described cleaning methods, according to the manufacturers, provides high-quality results. Each method has advantages and disadvantages in terms of implementation. In the case of washing with removal, you will need to experience difficulties in dismantling the element in the housing, spend a certain amount of time on washing, and also pay cash for 5 liters of flushing fluid. The advantages of the method can be considered its simplicity and the absence of the need to have special diagnostic equipment on hand in order to forcibly activate the self-cleaning system.

The second method significantly saves time, but may turn out to be even more financially expensive compared to the first. In this case, equipment is often required not only for spraying cleaner and washing, but also a diagnostic scanner for forced afterburning of soot. For this reason, it is preferable to carry out the cleaning procedure without removal at a service station by experienced specialists for an additional fee.

The third method is cheaper and faster, but inferior to others in efficiency. Many car enthusiasts consider the last two solutions for cleaning without removal more likely to be preventive methods that must be performed regularly under conditions of minor contamination diesel catalyst. For serious cleaning, a heavily clogged element must definitely be removed.

Finally, let us remind you once again that timely cleaning of the particulate filter of a diesel car can significantly extend the service life of the part and, in practice, will be much cheaper complete replacement the specified element to a new one.

Read also

Why is urea used in the diesel engine exhaust cleaning system? Application of AdBlue reagent in a liquid exhaust gas cleaning system.

Protects the particulate filter
- Helps the DPF regeneration system
- Ensures optimal combustion
- Reduces soot formation
- Especially for urban Vehicle and short distances

Regular use of Diesel Partikelfilter Schutz helps to avoid expensive particulate filter cleaning or replacement.

Purpose:

Highly effective remedy for diesel fuel, which cleans the particulate filter and extends its service life. Regular addition of the additive keeps the particulate filter clean, avoiding costly and time-consuming repairs. The use of a diesel particulate filter protection additive reduces the content harmful substances V exhaust gases. It is recommended to apply every 2000 km.

Application:

The product should be poured before refueling. Add the additive at the rate of 1 bottle per 75 liters of fuel. It is recommended to use the product every 2000 km. Mixing with fuel occurs independently.
Important: avoid overdose, as well as combined use with the Diesel Russ-Stop additive! Do not use in cars with chemically activated DPF regeneration, such as Peugeot, Citroen and others.

Magazine " BODY» together with the company LIQUI MOLY tested New Product for cleaning and protecting particulate filters.

With modern equipment diesel cars additional devices after-treatment of exhaust gases (soot DPF filters) problems also appeared in their work. The smaller the difference in exhaust gas pressure at the inlet and outlet of the particulate filter, the more efficiently the engine operates, the more economical fuel consumption is and the minimal pollution of the environment.

However, over the entire period of operation, solid soot particles, which are unburned particles of hydrocarbons, enter the pores of the particulate filter walls, limiting the flow of exhaust gases. The fine soot powder seems to be supposed to burn, but as the filter clogs, it mixes more and more with non-combustible materials and forms resins. This sticky mixture, coupled with metal sulfates, which are formed during the combustion of low-quality motor oil, clogs the particulate filter, creating increased back pressure for the exhaust gases inside.

The particulate filter can become almost completely clogged after just a few hundred kilometers, so the developers have provided a clever system for its “regeneration” - a process that oxidizes the resins inside the filter, after which they burn out. When the gas pressure at the inlet and outlet of the DPF exceeds permissible norm, the engine control unit turns on the burnout mode.

Computer enriches fuel mixture, as a result of which the temperature of the exhaust gases rises sharply. The load on the catalyst increases, and it, in turn, heats up to several hundred degrees, oxidizing the vapors of unburned fuel. After this, a hot mixture enters the particulate filter, which burns out deposits and cleans the filter. The same process can be initiated chemically - by adding a special additive that activates burn-through. At one time, the Volkswagen concern used this technology, and today designers from Peugeot and Citroen are passionate about similar developments.

In cars various brands the burn-through mode is activated when standard conditions. To do this, the car must be in motion and the engine must be running at medium or high speed. In dense city traffic, it is not always possible to achieve suitable conditions, so the filter continues to retain soot without self-cleaning, which leads to its complete clogging.

Ideally, the service life of a particulate filter is 150,000-200,000 kilometers, and self-regeneration occurs only once every 500-700 kilometers. However, in city traffic this part becomes unusable much earlier. Long traffic jams low quality fuel, elevated temperature environment and an aggressive driving style lead to the process of burning through the filter starting every 50-100 kilometers, which shortens the life of the unit to 50,000-60,000 kilometers. This is explained by the fact that during each regeneration, part of the platinum from the catalyst burns out along with petroleum products, which significantly affects its residual life.

In addition, in order to effectively burn out all the resins from the cavities, it is necessary to heat the catalyst to 600-650 ° C, which is almost impossible to do during a trip. As soot accumulates inside the system, the difference in gas pressure at the inlet to the filter and at the outlet from it will one day exceed the permissible values. As a result, when the particulate filter is more than 90% dirty, the engine will simply lose power and stall.

When appearing on dashboard If the vehicle receives a corresponding signal about a problem, you must urgently contact a service station. An experienced diagnostician will check the system and issue a conclusion. Often, manufacturers do not regulate the repair of dirty particulate filters, offering only a complete replacement of the part. Thus, by systematically pouring low-quality Russian diesel fuel into his car, the car owner obviously “subscribes” to permanent and expensive repairs. The cost of particulate filters themselves from top brands alone exceeds 100,000 rubles.

Of course, the car owner cannot influence the quality of the fuel, but he can take care of the safety of the filter. To achieve this, LIQUI MOLY has developed a program for cleaning and protecting particulate filters, which includes two fundamentally different cleaning technologies and special additive to facilitate filter regeneration.

The first technology allows you to work literally “on your knees” and not use scarce and expensive diagnostic devices. However, it is labor-intensive, requires a lot of time and involves removing the particulate filter. The second technology is faster, but requires the use of complex electronic equipment. As for the results, that is, the effectiveness of the product compositions, they are identical. According to LIQUI specialists MOLY, the cost of this service will not exceed 10,000-15,000 rubles, which is significantly cheaper than a complete filter replacement.

The editors of the magazine "KUZOV" decided to independently check new system and show readers her work. For this purpose, the publication’s correspondents chose an independent service station specializing in Mercedes-Benz cars, Where Dmitry Rudakov, LIQUI MOLY specialist, proposed to show and prove the effectiveness of the system on the third generation Mercedes ML model.

Difficulty working with Mercedes models is determined both by the inaccessibility of the particulate filter itself and by diagnostic features. For example, when checking cars Volkswagen concern The filter status is displayed on the screen of the diagnostic scanner. percentage, which significantly simplifies the decision-making process. Mercedes, on the contrary, only indicates a malfunction, indicating discrepancies in ideal and real values. Thus, the master must himself determine the nature of the upcoming repair.

To carry out the work, specialist Dmitry Rudakov will first of all need the LIQUI MOLY Pro-Line Diesel Partikel filter Reiniger cleaner and the Pro-Line Diesel Partikel filter Spulung wash/neutralizer.

The cleaning solution must be poured into a special tank onto which a gun with one of the attached probes is attached. Straight and curved manipulators allow you to work with almost all manufactured vehicles.

It is necessary to make sure that the temperature of the particulate filter is about 40 ° C, since it is under such conditions that the effect is most effective. Temperature can be seen on the screen diagnostic equipment, however, if it is not at hand, it is enough to measure the heating of the filter with an optical household pyrometer.

Next, you can remove the oxygen sensor located in front of the particulate filter, through which cleaning liquid will be supplied in portions. However, in our case, the specialist did not do this, since it is convenient to use a different hole on Mercedes. A LIQUI MOLY representative removed the catalyst temperature sensor, which is located in the middle of the filter, between the catalyst and the active DPF element. Access to cleaning fluid through this hole ensures correct distribution fluids in all cavities.

After test spraying, the cleaning composition is fed through the above opening into the filter in several stages. During this process, the probe must be rotated slowly, thereby ensuring uniform distribution of the product.

Now you need to wait 15 minutes and pour the remover/neutralizer inside in the same way. After finishing cleaning, replace the temperature sensor.

To evaporate the remaining composition from the filter, you need to start the engine and warm up the filter until operating temperature at 300°C. After this, using a diagnostic scanner, you need to start the mode forced regeneration. Then, within 10-20 minutes, you should drive 10 kilometers by car.

If it is not possible to leave the service station, you will have to simply press the gas pedal for the same time interval, but this must be done either on the street or with the exhaust gas removal system connected. Literally after a couple of minutes of engine operation under load, thick White smoke. This indicates that the procedure was carried out correctly.

A diagnostic scanner will also help determine how well the filter is cleaned. To do this, it is enough to check the readings of the exhaust gas pressure sensors at the inlet and outlet of the particulate filter as a percentage before and after the procedure. The effectiveness of the solution can also be judged by temperature values.

In our case, a reliability check showed that the catalyst temperature of 190°C is almost equal to the temperature inside the particulate filter - 180°C. According to standards, these readings should not differ by more than 60°C.

According to LIQUI MOLY estimates, the cost of the procedure for cleaning the particulate filter can vary between 10,000-15,000 rubles. This amount includes wages, Consumables and self-sufficiency of equipment, the price of which is 15,000 rubles. However, this is significantly cheaper than completely dismantling a damaged particulate filter, purchasing a new filter and then installing it.

According to Dmitry, on business-class cars it is advisable to carry out the procedure for cleaning the particulate filter together with changing the oil and cleaning the injector; it is advisable to include it in the list routine maintenance every 10,000-20,000 kilometers. On budget cars This should be done only as needed when a corresponding error appears.

As we have already said, the service life of a particulate filter is determined by the frequency of its burn-through. The more often this procedure occurs, the more catalyst (platinum) burns out irrevocably. Today it has become possible to increase the mileage between burns and reduce the process temperature. For this purpose, LIQUI MOLY has developed an additive to protect the diesel particulate filter Diesel Partikel filter Schutz, which we will discuss in detail in a separate article.