增压系统海拔自适应和调节能力研究

Study on Altitude Self-adaption and Adjustment Capacity of Turbocharging System

本文中针对增压柴油机海拔自适应和主动调节能力不清且只得通过大量试验确定的问题,开展增压系统海拔自适应和调节能力的分析方法研究。建立了增压系统海拔自适应能力分析模型,分析了影响海拔自适应能力的影响因素,推导了增压系统调节方式的调节量与海拔适应能力变化的对应关系。在变海拔柴油机性能测试台架完成了试验验证。结果显示海拔自适应能力模型计算结果与试验结果吻合,在不同海拔运行范围内,海拔调节能力的误差均小于5%。

For the problem of unclear altitude self-adaption and adjustment capacity of turbocharging system that can only be determined by lots of experiment,this paper investigates the evaluation method of altitude selfadaption and adjustment capacity for turbocharging system.The turbocharging system altitude self-adaption analysis model is established,and the influence factors on altitude self-adaption capacity are analyzed.The corresponding relationship between the turbocharging system regulation and altitude adjustment is deduced.The experiment of various altitude operation simulation is conducted on diesel engine performance test bench.The test results indicate that the calculated value by the altitude self-adaption capacity and the experimental results are coincident.The errors between calculated and experimental altitude adjustment capacity are less than 5%within the altitude operation range.