一个车用增压柴油机的实时动态仿真模型

A Real Time Model for Simulating Transient Conditions of Vehicle Turbocharged Diesel Engines

为进行电控增压柴油机的研究和开发 ,提出了一个车用增压柴油机的实时动态仿真模型。从控制的角度将系统分为压气机、发动机、废气放气装置和涡轮四个部分 ,将发动机每个工作循环的时间作为计算时间步长 ,将工作循环的平均参数作为计算目标 ,计算时间少 ,实时性好。对一台带有废气放气装置的车用增压柴油机的动态过程进行了仿真计算 ,计算结果与实测值进行了比较 ,计算精度满足实时动态仿真要求。

A real time model for simulating transient conditions of vehicle turbocharged diesel engines has been presented to research and develop the electronic-controlled turbocharged diesel engines. The system is divided into four parts, that is, compressor, engine, waste gate and turbine from the viewpoint of system control. The time between two working cycles is taken as calculation time step, and the mean parameters of each working cycle as calculation purpose. The model has such advantages as shorter calculation time and better real time characteristics. The model is used to simulate the transient conditions of a vehicle turbocharged diesel engine with waste gate. The calculated results are compared with the measured ones,showing that the calculation accuracy can meet the needs of real time transient modeling.