The Acceleration Performance in a Passenger Car Diesel Engine at Lower Temperature

摘要

This paper shows the acceleration performance in a diesel engine and clarifies the causes of its decline at low temperature operation. As the result, it is found that the transient torque in the initial stage of acceleration is only 70-80％　at ?10℃, compared to that of the warmed up engine. The torque deterioration over 80％ is caused by the increase of mechanical loss, and results from the higher oil viscosity in the cold state.