Control device for stepped transmission mechanism

摘要

A control device (12) for a stepped transmission mechanism is configured to perform an interlock by engaging a first clutch (32) and increasing hydraulic pressure of a second clutch (33) up to a first predetermined pressure (P1) such that an output shaft of the transmission mechanism is fixed, after an idle-stop condition including at least a requirement that a vehicle is stationary was satisfied and before a stop of an engine (1). The control device includes a gradient detecting section (12a, 47) that detects a gradient (R) of a road surface on which the vehicle is stationary; and a hydraulic control section (12c) that performs a slipping interlock by reducing the hydraulic pressure to a second predetermined pressure (P2), if the gradient R detected by the gradient detecting section is lower than or equal to a predetermined value (RTH) during the interlock and before the stop of the engine.

主权项

1. A control device for a stepped transmission mechanism, the control device being mounted in a vehicle having an idle stop function,
wherein the control device is configured to perform an interlock by engaging a first clutch and increasing hydraulic pressure of a second clutch up to a first predetermined pressure such that an output shaft of the transmission mechanism is fixed, after an idle-stop condition including at least a requirement that the vehicle is stationary was satisfied and before a stop of an engine, the first clutch is configured to be used for a movement start of the vehicle, and the second clutch is provided separately from the first clutch, the control device comprising: a gradient detecting section that detects a gradient of a road surface on which the vehicle is stationary; and a hydraulic control section that performs a slipping interlock such that a slipping state is realized by reducing the hydraulic pressure to a second predetermined pressure which is lower than the first predetermined pressure, if the gradient detected by the gradient detecting section is lower than or equal to a predetermined value during the interlock and before the stop of the engine.