(1) Diesel Engine Research Team, Mabookri, Gusungmyon, Yongingun, 449-910 Kyunggido, Korea;(2) Department of Mechanical Engineering, Yonsei University, 134 Shinchondong, Sudaemoonku, 120-749 Seoul, Korea
Abstract:
Fuel injection pipe pressures are measured and simulated to study the effect of fuel injection system characteristies on the heat release in a direct injection diesel engine. The fuel injection simulation is based on a linear model. The governing equations are solved by the finite difference method. The measured fuel pipe pressures and the simulated fuel pipe pressures matched well to each other except for the interval when the nozzle is closing. The effects of the fuel pipe length and the nozzle opening pressure are tested. The longer fuel pipe length causes proportional retardation of the fuel injection time. The higher nozzle opening pressure results in increase of the maximum fuel pipe pressure and shorter combustion duration.