| abstract |
An upshift shock reducing apparatus is provided to reduce upshift shock in a vehicle having a power train with a power source and an automatic transmission. The upshift shock reducing apparatus has a power source sensor that produces a signal indicative of a power source load, and a controller operatively coupled to the power source sensor, the power source, and the automatic transmission. The controller increases torque from the power source during the torque phase for a first predetermined period until the torque reaches a second predetermined torque, and decreases torque from the power source by a first predetermined torque at an end of a second predetermined period. The second predetermined period is determined based on the signal from the power source sensor, whereby the decreasing starts before the inertia phase. Therefore, the torque can be decreased before the inertia phase. |