【摘要】 建立了发动机燃油经济性模型,并在此基础上研究了发动机与无级变速传动系统的匹配策略,确定了发动机的目标转速与车速的关系。以实现汽车瞬态过程的动力性和稳态过程的经济性为依据,确定了综合控制策略。改进后的综合控制策略弥补了最佳燃油经济性控制策略的不足,提高了瞬态工况的动力性能,同时保持了稳定状态下系统的燃油经济性,改善了系统的性能。更多还原

【Abstract】 A fuel economy model was set up for the engine and on its basis the matching strategy for continuously variable transmission with the engine was studied and the relationship between engine goal rpm and vehicle speed was determined.The comprehensive control strategy was formulated from the demand on vehicle dynamic performance at transient operating conditions and fuel economy at steady operating conditions.The improved comprehensive control strategy remedies the deficiency of control strategy for best fuel economy,improves the vehicle dynamic performance at transient conditions without penalty on steady condition fuel economy.更多还原