| 摘要 |
PURPOSE:To prevent the deterioration of exhaust gas in sharp deceleration by carrying-out the correction on sharp deceleration added with the stationary learning in air-fuel ratio control. CONSTITUTION:An air-fuel ratio controller which performs feedback control according to the concentration of a specific component in exhaust gas carries- out stationary learning control when operation state does not vary. When sharp decleration is detected from the fundamental fuel injection amount, the correction in sharp deceleration (correction by shift coefficient Ks) is carried-out. In the correction by the shift coefficient Ks, the fuel injection amount is reduced in consideration of the adhession of fuel onto wall surface. The chart is a flow chart for obtaining the shift coefficient by the learing in sharp deceleration. Thus, the deterioration of exhaust gas in sharp decleration can be prevented. |
