| 摘要 |
PURPOSE:To reduce the shock of engine output characteristic changeover by detecting the output characteristic of an engine being changed over by means of an output characteristic changeover detecting means, lowering the motive power transmission capacity of an automatic transmission by means of a transmission capacity reducing means. CONSTITUTION:At the time of a transmission controller 13 being changed over from a P cam to an L cam or H cam, a line pressure control program checks whether or not P cam selection is being conducted on the basis of CAM information from an engine controller 12. When a changeover command from the P cam to another cam is detected, a lapse time from the changeover command is measured, and while the lapse time is discriminated to be less than a set time ts, line pressure Pu is retrieved from a map in accordance with a speed shift step command S and a throttle opening command TVO, and command is made to a control valve 11. Hereupon, the length of the set time ts is decided at a length that can fully cover the generation time of a shock caused at the time of changeover from the P cam to the L cam or the H cam. Also, a map for cam changeover is decided so that line pressure PL may become low against a map for ordinary use. |
