Diesel Particulate Filter (DPF) Removal – DPF Delete

What is Diesel Particulate Filter (DPF)?

The diesel particulate filter is a ceramic based active element. It is enclosed in a metal housing. The cellular structure of the filter element of the matrix consists of a parallel section of small channels. The walls of the channels play the role of a filter and absorb soot. After a certain time, the exhaust gases clog the filter, thereby delaying the release of hot gases. This can actually cause more pollution than the cleanliness it was intended for.

Since the implementation of the ‘Euro 5’ standard in 2009, new automotive exhaust emissions regulations have essentially mandated the installation of a DPF in the exhaust system of diesel vehicles. In fact, many cars that were registered before 2009 had one fitted in anticipation of the law change. The guidelines aim to cut diesel particulate (soot) emissions by 80%, but the technology is not without problems, as owners are discovering at a high cost.

How Diesel Particulate Filter (DPF) Works?

The DPF resembles a standard exhaust silencer in appearance, however it is located near to the engine. A honeycomb ceramic structure is used on the inside to filter exhaust gases while minimising flow decrease (which would otherwise limit performance). The particulate matter is deposited on the walls of the DPF by driving exhaust gases through the walls between the channels, lowering air pollution. When the DPF achieves a specific degree of ‘Saturation,’ it goes through a regeneration cycle to burn off the particulate matter.

There are two types of DPF regeneration:

Active DPF Regeneration System

The ECU will commence post combustion fuel injection to raise the exhaust temperature and activate regeneration when the soot loading in the filter exceeds a specified limit (about 45 percent). If the voyage is a bit stop-and-go, or if you remove your foot off the accelerator while the regeneration is taking place, the regeneration may not be completed, and the warning light will illuminate to indicate that the filter is partially obstructed.

Passive DPF Regeneration System

When the exhaust temperature is high on highway-type runs, passive regeneration occurs automatically. Because many automobiles do not see this level of use, automakers must incorporate ‘active’ regeneration, in which the engine management computer (ECU) takes charge of the process.

A car that is mostly used on the highway will operate at higher temperatures and emit significantly less particulate matter than one that is primarily utilized in a stop-and-go city environment. Because it is in the ideal driving environment for regeneration, a vehicle utilized on the highway will be able to regenerate more often and effectively.

Do DPF Require Maintenance?

The design life of a DPF is roughly 75,000 miles, although this might vary greatly depending on vehicle use and engine health. The particulate matter is burned down to a considerably lower amount of finer soot every time the ECU triggers a regeneration cycle, but it is not entirely cleared from the filter. The fine soot content builds up over time to the point where a regeneration cycle is no longer possible; at this point, the filter must either be emptied or replaced.
Removing the DPF is frequently recommended to evaluate the opacity of the exhaust emissions, which might indicate any potential operating difficulties that could affect the DPF’s performance. DPF life can be drastically reduced by issues such as leaky injectors and engines that burn oil.

Causes of DPF Failure

There are a multitude of reasons a DPF can fail:

  • High mileage and compacted with fine soot.
  • Failed sensors preventing DPF regeneration.
  • Lack of additive in fuel (where fitted) causing incomplete burn off.
  • Engine issues i.e. leaking injector, valve stem oil seals, worn piston rings.
  • DPF unable to regenerate due to driving conditions i.e. City centre.
  • Poor performance tuning.
  • Driving in too low of a gear on a motorway disallowing the regeneration to commence.

Benefits OF DPF Removal - DPF Delete

The DPF Removal software from Top Tuners will ensure that your car runs without the DPF. Most customers benefit from a performance remap in addition to the DPF remap, which delivers even greater results than the DPF removal alone. The following are some of the advantages of removing DPF:

  • No more limp modes when the vehicle decides to do a forced regeneration.
  • Improved MPG due to the removal of an air restriction allowing the engine to breather better.
  • Improved power output of the vehicle. We have tested many vehicle’s on our dynamometer before and after DPF removal and every single one has provided a performance gain.
  • After DPF removal it is possible to use bio fuels as they can no longer cause issue to the DPF filter.

you have More questions about DPF Removal?

All inquiries about DIESEL PARTICULATE FILTER (DPF) and performance optimization in general will be gladly answered by our experts. Simply send us an email, call us, or fill out our contact form!