DPF regeneration with VCDS
167.3 هزار بار بازدید -
6 سال پیش
-
This is how to perform
This is how to perform diesel particulate filter regeneration,
both while driving and with Vag-Com Diagnostic Software (VCDS).
Performed on Audi A4 B8.
DPF Regeneration can be done in 3 ways:
1) Passive regeneration while driving. This occurs primarily at higher engine loads, when the exhaust gas temperatures are high enough to burn off soot (350-500 degrees C). 60km/t, 2000rpm, at least 20 minutes.
2) Active regeneration while driving.
As soon as a specific soot load in the filter has been measured (above 18g), the ECU initiates a post-injection of additional fuel into the combusion chamber, to help raise the temperatures and burn off soot in the filter.
1. happens without intervention of the ECU.
2. is normally done when the 1st process is incomplete or aborted (usually when frequently driving short trips, not long enough for the DPF to reach optimal temperature and burn clean). You can sometimes hear the active regeneration, because the exhaust sound changes to a more 'deep droning'. The RPM at idle also increses by 150 (i.e. from 800 to 950 RPM).
3) Forced service regeneration when stationary.
This can only be done with software, like VCDS.
I only do the 3rd option if the soot mass measured gets above 24g, and Im not able to do a long trip. It's not recommended to do a forced regen unless necessary, because the extra fuel beeing injected can dilute the engine oil, therefore an oilchange is desireable after forced regen.
40g soot is the upper/critical level for forced regeneration. If the soot mass exeeds 45g, regeneration is no longer possible and the DPF must be replaced.
both while driving and with Vag-Com Diagnostic Software (VCDS).
Performed on Audi A4 B8.
DPF Regeneration can be done in 3 ways:
1) Passive regeneration while driving. This occurs primarily at higher engine loads, when the exhaust gas temperatures are high enough to burn off soot (350-500 degrees C). 60km/t, 2000rpm, at least 20 minutes.
2) Active regeneration while driving.
As soon as a specific soot load in the filter has been measured (above 18g), the ECU initiates a post-injection of additional fuel into the combusion chamber, to help raise the temperatures and burn off soot in the filter.
1. happens without intervention of the ECU.
2. is normally done when the 1st process is incomplete or aborted (usually when frequently driving short trips, not long enough for the DPF to reach optimal temperature and burn clean). You can sometimes hear the active regeneration, because the exhaust sound changes to a more 'deep droning'. The RPM at idle also increses by 150 (i.e. from 800 to 950 RPM).
3) Forced service regeneration when stationary.
This can only be done with software, like VCDS.
I only do the 3rd option if the soot mass measured gets above 24g, and Im not able to do a long trip. It's not recommended to do a forced regen unless necessary, because the extra fuel beeing injected can dilute the engine oil, therefore an oilchange is desireable after forced regen.
40g soot is the upper/critical level for forced regeneration. If the soot mass exeeds 45g, regeneration is no longer possible and the DPF must be replaced.
6 سال پیش
در تاریخ 1397/01/18 منتشر شده
است.
167,373
بـار بازدید شده