直喷式柴油机机械效率的数值计算与研究

本文应用一个数学模型计算研究直接喷射式柴油机的机械损失和机械效率.这个数学模型模拟了发动机气缸内的整个热力过程,考虑了瞬时传热损失和瞬时摩擦损失.通过数值计算可以求得发动机在各种工况时的机械效率与平均机械损失压力.计算是针对一台12V150L柴油机进行的.文中还研究了参数变化对机械损失和机械效率的影响.

Numerical Calculation and Study of Mechanical Efficiency for Direct - Injection Diesel Engine

In this paper a mathematical model is used for calculating mechanical efficiency and mechanical loss of direct - injection diesel engine. The model simulates a full thermodynamic processes in cylinder and considers the losses of instantaneous heat transfer and instantaneous friction. Mechanical efficiency and mean mechanical loss pressure under various working conditions can be obtained by the numerical computing. The calculation is conducted for a 12V150L diesel engine. Effects of parameter change on mechanical efficiency and mechanical loss are predicted in the paper.