用本文所述的四象限列线图,可以在柴油机和涡轮增压器特性参数给定的情况下,通过简单的逐步逼近作图法求得柴油机的扫气压力、排气背压和空气流量。除了求解上述参数的绝对值外,本方法还特别适于从已知的运行点出发,预算柴油机转速、功率、涡轮增压器效率、涡轮喷嘴截面积和环境状态参数等特性参数变化时所产生的影响。文中列载了一些解法实例,并又阐述了四象限列线图的原理。 Using the four-quadrant alignment diagram described in this paper, the scavenging pressure, exhaust back pressure and air flow of diesel engine can be calculated by a simple stepwise approximation method given the characteristic parameters of diesel engine and turbocharger. . In addition to solving for the absolute value of the above parameters, the method is also particularly suitable for starting from a known operating point, resulting in a change in characteristic parameters such as diesel engine speed, power, turbocharger efficiency, turbine nozzle cross-sectional area and environmental state parameters Impact. The article lists some examples of solution, and then elaborates the principle of four-quadrant alignment chart.