利用实测发动机瞬态转速波动估计缸内燃气压力  

Estimation of Cylinder Pressure from Measurement Crankshaft Transient Speed Fluctuation

作　　者：苏铁熊[1] 张浅秋[2] 

机构地区：[1]华北工学院热能与动力工程系,太原030051 [2]中国兵器装备集团

出　　处：《内燃机工程》2004年第3期54-57,共4页Chinese Internal Combustion Engine Engineering

摘　　要：本文针对从瞬态曲轴转速波动估计出缸内燃气压力扭矩后,由于有不可预见性问题,难以用动力学方法估计出缸内燃气压力的现象,研究并发现在一定条件下平均指示压力和放热规律之间存在一一对应的关系。在提出了标准放热规律的概念后,给出了由实测瞬态曲轴转速波动估计平均指示压力,由其确定放热规律,最终估计出缸内燃气压力。Estimation of cylinder pressure from cylinder pressure torsion is very difficult based on transient speed fluctuation of crankshaft, and could not be estimated by using the traditional dynamic formula. It discovered that there is a one and only corresponding relation between indicated mean effective pressure (IMEP) and heat release rate (HRR). The normalized heat release rate (NHRR) was brought forward. The IMEP estimated by the speed fluctuation of crankshaft was given to confirm the heat release rate and the In - cylinder combustion pressure.

关 键 词：内燃机 曲轴 瞬态转速波动 缸内燃气压力 

分 类 号：TK421.12[动力工程及工程热物理—动力机械及工程]