| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily restrain sudden increase of output shaft torque of an automatic transmission at the time of power-on-up-shift of the automatic transmission on a vehicle. SOLUTION: Turbine rotational speed of an automatic transmission is gradually lowered from initial speed change stage equivalent rotational speed to following speed change stage equivalent rotational speed at the time of power-on-up-shift of the automatic transmission on a vehicle, but, at an A point where lowering from the initial speed change stage equivalent rotational speed is detected, large retard by a spark- advance angle which is a spark-advance angle X at the time on an connecting engine multiplied by a retard coefficient (a) of 1 or less is carried out for specified time T, thereafter, while the turbine rotational speed is from the following speed change stage equivalent rotational speed to a C point which is larger byΔN1, small retard by a spark-advance angle which is the spark-advance angle X multiplied by a retard coefficient (b) is carried out, and additionally, while the turbine rotational speed is from the following speed change stage equivalent rotational speed to a D point which is slight larger byΔN2, much smaller retard by a spark-advance angle which is the spark-advance angle X multiplied by a retard coefficient (c) is carried out.</p> |
