电控发动机喷油控制MAP的建模与仿真

Modeling and Simulation of Fuel-injection MAP of Electronically Controlled Engine

在求解进气压力及发动机循环喷油量时运用了数学模型算法。通过改建发动机试验台架、采用试验和参数模型相结合的方法,建立了初始喷油脉宽数学模型。仿真计算得到发动机电控喷射系统的初始MAP图,其结果与国产汽油发动机的台架试验结果基本一致。

A new mathematic model for evaluating the intake pressure and cyclic fuel injection of the engine is presented. By rebuilding engine test bench and combining the parameter model with testing, a mathematic model for initial injection pulse-width is set up. Then the initial MAP graph for EFI system is obtained from simulation. The results are well consistent with that of bench test for domestic gasoline engine.