在设计机械增压柴油机时,产生了一系列的问题,例如:关于增压压比δ_H、气缸内最大压力值P_z以及压缩比ε等问题。在选择柴油机这些工作参数的问题上,存在着不同的观点。本文仅就这些问题中的某些问题予以研讨。 增压提高了发动机的功率,但同时机械负荷和热负荷也增大了。随着气缸内燃气压力的增高,机械损失亦增加了,机械损失增加,也就是传动增压器消耗的功率增加,即发动机经济性指标变坏了。 When designing a supercharged diesel engine, a series of problems have arisen, for example, regarding the charging pressure ratio δ_H, the maximum pressure P_z in the cylinder, and the compression ratio ε. There are different points of view on the choice of these operating parameters for diesel engines. This article discusses only some of these issues. Boosting increases the power of the engine, but at the same time the mechanical and thermal loads also increase. As the gas pressure in the cylinder increases, the mechanical loss also increases, the mechanical loss increases, that is, the power consumed by the transmission supercharger increases, ie, the engine economy index deteriorates.