Abstract:

The trapping, loading and regenerating behaviors of a noncoated SiC diesel particulate filter(DPF) were investigated experimentally on a CA6DL235E3 high pressure common rail heavyduty diesel engine with the fuel borne catalyst(FBC) added into the used 0# diesel fuel. The results show that the particulate trapping efficiency was up to 90% under the ESC13 test cycle using low sulfur Euro4 0# diesel fuel. During the regeneration process the temperature at DPF outlet position was the highest near the central axis, being the thermal stress concentration area. According to the ESC condition weight distribution and the feasible regenerative condition range, the weight ratio between the regenerative and nonregenerative conditions is much higher than the ratio between the limit regenerative time and loading time. This implicates the DPF with FBC can regenerate reliably. The particulate loading in DPF causes EGR change obviously, so the DPF/FBC technology is suitable for the technical route of EGR coupled with DPF for the Euro4 diesel engine.

Key words: power machinery and engineering, diesel engine, diesel particulate filter(DPF), regeneration, fuel borne catalyst(FBC), particulate emission