By constructing an one-dimensional thermodynamic simulation model of diesel engine coupled with diesel particle filter (DPF)

the effect of ash distribution coefficient on the performance of diesel engine was studied

focusing on the influence of ash distribution coefficient on the thermal efficiency of the diesel engine system. The results show that when the soot loading is 6g/L and the ash loading is 33g/L

the DPF pressure drop and filtration efficiency increase with the increase of the ash distribution coefficient. When the ash distribution coefficient increases

the diesel torque

the maximum pressure in the cylinder

and the NOx emissions decline

and the soot emissions increase. When the ash distribution coefficient increases

the engine brake specific fuel consumption and DPF regeneration frequency increase

and the engine thermal system efficiency that contains both diesel thermal efficiency and DPF regeneration efficiency decreases. Relying solely on the DPF pressure drop to determine the start of active regeneration have a large error

and the error increases with the increase of the ash loading.