BMW - Diesel particluate filter (DPF) regeneration. To enable regeneration of the partuculate filter, regeneration must be requested in the DDE control unit. The regeneration is requested in that the consumed fuel since the last regeneration is set to a maximum value in the DDE control unit.
When the DPF filter reaches about 45% blockage the filter will begin “active regeneration” this means that the EGR (Exhaust gas Recirculation) valve is closed, the boost pressure from the turbo is increased slightly along with a slightly higher idle RPM. Diesel is then injected into the cylinders just after combustion so that it enters the
Official quote from BMW on the DPF: "The diesel particle filter removes almost all soot particulates from the exhaust, and eliminates them by burning them within the filter. The catalyst layer in the filter means they can regenerate without the need for fuel additives, resulting in better performance than can be achieved with the use of Once the cause is diagnosed and repaired, the DPF can usually be cleaned by initiating a manual/forced regeneration. This is done using our Mercedes diagnostic PCs. We see a 80% success rate with manual or forced regenerations. If a manual DPF regeneration is not successful, the DPF can be removed and cleaned in a liquid bath solution.
Regeneration, or regen, of the DPF filter is the process that burns the soot accumulation that is inside the DPF filter. Educating yourself on what a forced regeneration is and how it works will help you understand your aftertreatment system better. Forced regeneration is performed when a diagnostic scan tool starts the regeneration process.
During a DPF regeneration the DPF itself and the exhaust get extremely hot, this can result in some unusual smells, especially if the car is new. In order to generate the heat required to burn off the stored soot inside the DPF the car essentially over-fuels and increase the engine RPM at idle, this can cause a temporary change in the driving Your DPF should remain reliable if you do a proper highway drive every 300 miles or so, stick to a proper maintenance schedule, and have it cleaned professionally periodically.It's very important
For the benefit of others: 1) Clear faults for engine. 2) Change to EOL service mode. 3) Login with code 27971. 4) Basic Settings > Service DPF Regeneration (cant remember the exact wording) 5) Long press the green button (it will say it exited due to safety) 6) Turn off engine (ignition still on) 7) Turn on engine.
When the diesel particulate filter (DPF) reaches a pre-determined particulate matter (PM) fill level of around 40 per cent, the ECU activates a regeneration process which can inject fuel up to eight times more fuel per stroke to produce temperatures in excess of 550⁰C dry or 450⁰C with the passive system to incinerate the PM.
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    • how does bmw dpf regeneration work