What is a particulate filter and how does it work?
The particulate filter, also known as DPF (Diesel Particulate Filter), is a device that captures and stores soot particles and other pollutants produced by diesel engines. Its main function is to reduce the amount of harmful emissions released into the environment. The filter retains these particles and, when they accumulate in excess, a regeneration process is activated that burns them at high temperatures. The DPF allows diesel vehicles to meet emissions regulations, but over time the filter can become blocked if not properly maintained, which can lead to performance problems.Common particulate filter problems and their causes
The particulate filter can present a number of problems if not properly maintained. The main problems include filter clogging, loss of efficiency in the regeneration system and sensor failures. These are some of the most common causes:- Short distance driving: Short distance driving prevents the filter from reaching the necessary temperatures to regenerate automatically.
- Lack of regular maintenance: Lack of filter cleaning and maintenance can lead to excessive accumulation of particles.
- Use of low quality fuel: Poor quality fuel can generate more residues and hinder DPF regeneration.
Symptoms of particulate filter failure
It is important to recognize the symptoms that indicate that the particulate filter is failing or blocked, in order to take timely action and avoid serious damage to the vehicle.What light comes on when the particulate filter fails?
When the particulate filter has a problem, the engine light or a specific DPF light on the instrument panel illuminates. This indicates that the filter is clogged or that there is a failure in the regeneration system. If this light appears, it is essential to have the filter checked as soon as possible.5 main problems of damaged or blocked particulate filters
Here are the 5 most common problems that can cause particulate filter failure:Defective EGR valve
The EGR (exhaust gas recirculation) valve is a key component in controlling engine emissions. If this valve fails, exhaust gases are not properly recirculated, which can increase particulate buildup in the filter, causing blockages and ineffective regeneration.Use of wrong oil
The use of incorrect or poor quality engine oil can increase the amount of ash generated, which can cause a more rapid buildup of debris in the particulate filter. This makes regeneration more difficult and can cause the filter to clog more quickly.Defective fuel injectors
Fuel injectors are responsible for the correct atomization of fuel for combustion. If the injectors are defective, the fuel does not burn properly, which increases the amount of soot and particles that go to the particulate filter, causing clogging.Defective turbo
The turbo helps increase engine efficiency, but if it is defective, it can affect air flow and combustion. This can result in more waste generated and faster clogging of the particulate filter.Short trips
If you drive mainly on short trips or in town, the engine will not reach the necessary temperature to perform a complete regeneration of the particulate filter. This causes the filter to become clogged more quickly, as the accumulated particles are not burned efficiently.CONTACT US
How to keep the particulate filter in good condition?
Proper maintenance of the particulate filter is key to avoiding problems and prolonging its service life. Here are some tips to keep it in good condition:- Drive at high speeds regularly: Driving long distances at a constant speed will allow the filter to reach the necessary temperature for passive regeneration.
- Replace oil and fuel regularly: Using high quality oil and fuel is essential to reduce the amount of ash and particles that accumulate in the filter.
- Clean the particulate filter regularly: Performing preventive cleaning using specialized products, such as Oxyhtech’s DPF cleaning fluids, will help keep the filter in good condition.
- Replace defective parts: If the vehicle has faults in the EGR valve, injectors or turbocharger, it is important to repair or replace them as soon as possible to avoid excessive particulate buildup.
What to do if I have problems with the particulate filter?
If you notice symptoms of particulate filter failure or the warning light comes on, it is crucial that you take immediate action:- Do a forced regeneration: If the vehicle cannot regenerate the particulate filter automatically, it may be necessary to force the regeneration in a specialized workshop.
- Filter cleaning: If the filter is blocked, it may need to be cleaned with specialized products. At Oxyhtech, we offer DPF cleaning fluids that dissolve accumulated soot and allow for efficient regeneration.
- Particulate filter replacement: If the particulate filter is too damaged or cannot be cleaned, it may need to be replaced.
DPF cleaning solutions
There are several solutions to clean the particulate filter and ensure its operation:- Chemical cleaning: Consists in the use of DPF cleaning fluids, which dissolve the soot particles accumulated in the filter, allowing their removal without the need to disassemble it.
- Ultrasonic cleaning: Uses ultrasonic waves to remove debris trapped in the filter more thoroughly.
- Forced regeneration: When the filter is clogged, it is possible to perform a forced regeneration in a workshop, using equipment that raises the temperature of the filter to burn off the trapped particles.
