并联混合动力车汽油发动机的起动和暖机过程研究

Investigation of Gasoline Engine Cold-Start and Warm-up for Parallel Hybrid Electric Vehicle

研究了混合动力车用汽油机起动暖机过程的标定策略,在台架上对一台混合动力车用汽油机拖动和暖机工况的喷油及点火控制参数进行了重新标定,通过适当加大起动和暖机空燃比、加快暖机期间空燃比向化学计量空燃比的过渡以及适当推迟点火时刻等措施,显著加快了催化转化器起燃速度,改善了排放性能。

This paper presented gasoline engine management system reealibration strategies for parallel hybrid electric vehicle and recalibrated some parameters about fuel injection and spark control on test bed. Through appropriately increasing air fuel ratio during cold-start and warm-up, accelerating transition from warming-up air fuel ratio to stoichiometric air fuel ratio and retarding spark timing＇ the light-off of catalyst was quickened and the engine emissions was reduced largely.