内摆线单缸柴油机工作过程建模与数值模拟

Modeling and Simulation of New Type Hypocycloid Single-cylinder Diesel Engine

运用热力学理论建立了新型内摆线单缸柴油机工作过程的数学模型,采用Matlab编制了计算程序,对缸内压力、温度和平均指示压力等主要性能指标进行了仿真研究。结果表明:所建模型能够较好地模拟和预测新型内摆线单缸柴油机性能;新型内摆线单缸柴油机活塞作简谐直线运动,气缸压力高于传统S195型柴油机,最高爆发压力提高了5%,平均指示压力提高了10.7%。说明新型内摆线能量转换机构能够改善内燃机工作过程。

Mathematic model of the working process for new type hypocycloid single-cylinder diesel engine was built base on thermodynamic theory. And simulation for the pressure and temperature in cylinder, the mean effective pressure and so on, was performed in Matlab software. The results show that the model exactly predicts the performance of the new type hypocycloid single-cylinder diesel engine. The new engine has a higher cylinder pressure than the conventional S195 diesel engine. The maximum pressure and indicated mean effective pressure is improved by 5 % and 10.7 %, respectively. And the transformation mechanism of the new hypocycloid energy improves working process of the engine.