Getriebe-Steuervorrichtung mit Detektion fehlerhaften Gangwechsels.

摘要

A transmission control system with gear shift failure detection includes a transmission (1), each gear of which is equipped with a synchromesh mechanism (1e); an actuator unit (2) consisting of a shift actuator (2a) for making a gear shift in a shift direction and a select actuator (2b) for making a gear shift in a select direction; a control unit (4) for calculating a target position signal (M) from an amount of pressdown of an accelerator pedal, a vehicle speed, and a set position of a gear selector to control not only said actuator unit so that a gear is set within a target range but also a clutch so that connection or disconnection is made according to an operation of said transmission; a position detector (2f, 2g) provided in each of said shift and select actuators for detecting a position of a piston rod (2c, 2d); a servo cylinder (2a, 2b) in response to a signal from said position detector to position said piston rod at a given position of each gear; a speed detector (4a) in response to a signal from said position detector of said shift actuator to detect an operational speed of said piston rod of said shift actuator; and a decision maker (4b) in response to a signal from said speed detector to decide that a gear shift is faulted if said operation speed is lower than a reference speed for a predetermined time outside a synchromesh mechanism operational range of said transmission.