【摘要】 在发动机台架上对EQ491i电控汽油喷射发动机的加、减载瞬态过程的空燃比进行了测量 ,对引起瞬态过程空燃比变化的原因进行了分析 ,并通过试验研究了相应的修正控制项对空燃比的影响。研究结果表明 ,以线性表格为基础的修正方式不能完全控制瞬态过程空燃比的偏移 ,初始阶段的空燃比偏移脉冲难以避免。更多还原

【Abstract】 Through a group of transient AFR tests on a EQ491i engine,this paper analyzed the factors which cause AFR excursion in transient and studied the effect of the modification terms on transient AFR excursion.The study shows that the modification manner based on linear table can′t eliminate the AFR excursion in transient and the AFR pulse at the beginning of transient is inevitable.更多还原