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本发明一般地阐述一种提高四冲程内燃机,例如柴油机,尤其是定压增压柴油机效率的方法。针对标定负荷计算的发动机最佳工作状态,在起动、部分负荷和重负荷时显著受到影响。在柴油机中,为了降低压缩冲程终了时的压力,通常对重负载时的压缩比加以限制。根据一种用于燃气发动机的米勒循环方法(见“两级增压可变压缩比的四冲程高速柴油机”G·Zappa和T·Franca;第十三届国际内燃机
The present invention generally describes a method of increasing the efficiency of a four-stroke internal combustion engine, such as a diesel engine, especially a fixed-pressure turbocharged diesel engine. The optimum engine operating condition for the calibration load is significantly affected at start-up, part load and heavy load. In diesel engines, the compression ratio at heavy loads is usually limited in order to reduce the pressure at the end of the compression stroke. According to a Miller cycle method for gas engines (see “G Zappa and T Franca,” Two-stage, Variable-compression, Four-stroke High Speed Diesel Engine; Thirteenth International Internal Combustion Engine