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增压柴油机单缸试验模拟得正确与否,关系到单缸工作能否指导多缸实践,并将试验成果推广到生产实践中去。脉冲增压时,单缸机及试验台的排气系统能否正确模拟多缸机的排气系统,使二者具有接近的压力波形尤为重要。脉冲增压系统排气管内压力波的形状及燃气温度,决定了涡轮可利用能量的大小;排气系统的流通特性又是压力波形状的决定因素之一。本文以16200Z柴油机及其单缸机试验为例,对此进行了计算和分析,以探求单缸模拟多缸的接近程度及提供性能参数的可依赖程度。
Turbocharged single-cylinder diesel engine simulation test is correct or not, relates to the single-cylinder work can guide the practice of multi-cylinder, and test results extended to production practice. Pulse pressurization, single-cylinder engine and test bed exhaust system can correctly simulate the exhaust system of multi-cylinder machine, the two have close to the pressure waveform is particularly important. Pulse pressurized system exhaust pipe pressure wave shape and gas temperature, the turbine determines the size of the available energy; exhaust system flow characteristics and pressure wave shape is one of the determinants. In this paper, 16200Z diesel engine and its single cylinder test as an example, this is calculated and analyzed in order to explore the proximity of single cylinder simulation of multi-cylinder and provide dependability of performance parameters.