Столкнулся с такой проблемой попалась машинка дизель нужно отключить DPF и наткнулся на проблему что правильно его отключить не кто не знает как
нашел статью как работает алгоритм сажевого фильтра Note that the chart represents trigger areas, not like going back and forth through all states.
Soot accumulation <65%: Nothing to do. Soot will accumulate or burn off passively depending on exhaust gas temperature (EGT).
Soot ?65%: If DPF is warm enough, ECU will turn on active regeneration – fuel post injection to actively raise DPF temp to roughly 650°C. In case DPF being too cold, it defers when possible. Low DPF temp has one advantage at least: less flow resistance.
Soot >85% and DPF temp too low: Soot-high warning also known as vehicle speed request. Turns on DPF light steady: Ideally when there’s some vehicle speed and engine load, EGT and DPF temp rise to a point where active regeneration can be activated. DPF light may stay ON till soot drops below 75% (hysteresis). If soot further accumulates, state goes into red area, see next item.
Soot >100% – compulsory regeneration needed aka dealer visit request: One of several reasons that trigger flashing DPF light: Seems like in this state it does not do active regens anymore. Better get to dealer for diagnostics and compulsory regen as soon as possible.
Soot >135% – DPF Limp-Home Mode = DTC P1469: DPF light flashing: Reduced max power. Compulsory regen not allowed anymore – without applying special tricks the DPF has to be replaced! Subaru might refuse warranty if customer had ignored flashing DPF light for too long.
ECU seems to keep this going for 12.5 minutes at least, even if soot has dropped to very low percentage already. If engine is turned off while active regen is in progress, it must abort the action. No harm done this way except there’s probably some soot left, next regen will occur sooner and regen counter is not being incremented. Likewise, distance since last regeneration parameter is not being reset to zero. Next time the engine is running, ECU gets to analyse DPF state and decides as usual. Just don’t rely on the regen counter for comparisons – short-distance operation will result in very low counts including high mileage interval values as ECU rarely gets all the time needed to complete the process.
Done in parking, needs special software that dealerships have, we can do it, too. On Euro4 models ECU seems to rev the engine up for 10 minutes (does not wait till all soot is burned off, e.g. may stop at 25% soot), 15 minutes on E5. Engine speed follows a pre-defined graph, starting at 2700 rpm, decreasing to 2600 rpm later on.
Euro4 vs. Euro5
So far we’ve seen mostly same constants e.g. max soot capacity 26 g in both ROM types, looks like DPF hardware is the same. The reason why Euro5 usually get larger distances between DPF active regens might be a result of producing less soot in the first place. This is due to smaller injector holes (incl. higher average fuel pressure?) plus overall engine refinements. I’d assume the downside of smaller injector holes is increased sensitivity regarding fuel quality.
Сегодня приготовлю прошивку для наглядного образца показать что делают люди отключая сажевый фильтр и чтоб не быть голословным