Control apparatus for hydraulically operated vehicular transmission

摘要

Measurement is made of a time of lapse (TMSTB - TM) from the time at which the hydraulic pressure of the hydraulic engaging element on engaging side to be engaged at the time of speed changing (ON pressure) has increased to a predetermined pressure (QUPONB). Even if an input and output speed ratio of the transmission ("Gratio") does not fall within a predetermined range, i.e., a range between YG(N + 1)L and YG(N + 1)H, which serves as a basis for judging whether the speed changing has been completed or not, a processing of speed change completion (S11) is performed when the above-described value TMSTB-TM has reached a predetermined value YTMUP4 (S32), to boost the ON pressure to the line pressure.