| 摘要 |
PURPOSE:In an internal-combustion engine equipped with an automatic speed change gear having a lockup mechanism, to prevent the deterioration of drivability during lockup by lowering EGR upon locking up of said gear in the low speed rotary region of engine. CONSTITUTION:EGR control valve 24 provided in EGR path 23 is controlled to produce the optimal EGR in accordance to each operating parameter by means of a constant voltage controller 40 to be provided with the detected values from a suction air temperature sensor 28, throttle position sensor 29, water temperature sensor 30, O2 sensor 31, crank angle sensor 32, car speed sensor 35, etc. An electronic control section 40 will decide the speed change position and whether it is under lockup condition or not through the throttle opening and the function of a lockup device in an automatic speed change gear 36 while to lower EGR during lockup. |
