【摘要】 提出了燃油密度随压力和温度变化的综合经验公式 ,根据各参数间的严格关系推出了压缩率和音速的经验公式 ,并介绍了粘度的经验公式。试验结果表明 ,提出的经验公式具有较高的精度。更多还原

【Abstract】 The mathematical model for simulated calculation of fuel injection process in high pressure fuel injection system for diesel engines should be established in accordance with the fuel characteristics of density,compression ratio,sonic velocity and viscosity variations with pressure.In this paper,the experiential formula of fuel density variation with pressure and temperature is put forward and the formulae of fuel compression ratio and sonic velocity are also derived in light of the strict relationships of fuel parameters,and besides,the viscosity formula is recommended.The experiential formulae offered in this paper possess high precision according to the experimental results.更多还原