REGELUNGSVORRICHTUNG FUER EIN AUTOMATISCHES GETRIEBE

摘要

A control apparatus for an automatic transmission having a torque converter is so adapted that first a comparatively high-speed change ratio is set when there is a range changeover between the reverse range R and a forward cruising range (e.g., D, S, or L). This comparatively high-speed change ratio is maintained until it is detected that the gear mechanism of the automatic transmission is substantially formed for this high change ratio. A transition is made to a low-speed change ratio after it is confirmed that the gear mechanism is substantially formed for the high change ratio. By virtue of this operation, the torque delivered by the output shaft of the transmission assumes a step-shaped form in the course of the transition from the high-speed change ratio to the low-speed change ratio. As a result, a large transmission shock is minimized.