Shifting completion of the automatic transmission time determining apparatus and the general control unit for a shift shock reduction in the power train using the same

摘要

PURPOSE: To accurately detect a finish of speed change, and reduce a speed change shock by regarding time when the pseudo-speed ratio of a torque converter becomes the speed ratio at successively set speed change finish time as speed change finish time, and discriminating the speed change finish time. ;CONSTITUTION: An automatic speed change control computer 11 to perform speed change control and line pressure control inputs an engine rotating speed signal Ne and a throttle opening signal Tvo from sensors 6 and 7 and an output shaft rotation signal No from an output rotating speed sensor 12 of an automatic transmission 3. Pseudo-input rotating speed is found by multiplying output shaft rotating speed by the gear ratio after speed change, and the pseudo-speed ratio of a torque converter expressed by the ratio of engine rotating speed to this pseudo-input rotating speed is calculated. The speed ratio of the torque converter at speed change finish time is successively set on the basis of a load and output rotating speed of an engine, and time when the pseudo-speed ratio becomes the speed ratio at speed change finish time is regarded as speed change finish time, and the speed change finish time is discriminated.;COPYRIGHT: (C)1996,JPO