【摘要】 在捷达轿车进气道喷射发动机的基础上搭建了试验台架,对原机ECU在发动机不同起动状态下的喷油、点火以及排放进行试验研究。结果表明,热机状态下的高速起动可以显著减少起动初期供给的喷油量,同时也可以减少点火能量;汽油机热机状态HC、CO排放要低于冷机工况;高速工况CO的排放要低于低速工况;汽油机无论是哪一种起动状态,NOx排放都处于一种较低的水平更多还原

【Abstract】 A test bench is built based on the port-injection engine of Jetta car,on which fuel injection,ignition and emission under different starting state of engine are tested and studied.The results show that high-speed start under hot engine state can significantly reduce the amount of fuel provided at the early stage of starting,meanwhile,ignition energy can also be reduced;HC and CO emission under hot engine state are lower than that of cold engine;Co emission under high-speed condition is lower than that of low-speed condition;NOx emission maintains at a comparatively lower level whichever starting status the gasoline engine is in.更多还原