Transmission control system with gear shift failure detection

Details Transmission control system with gear shift failure detection Transmission control system with gear shift failure detection

1990-09-24

1992-12-01

Lorence, Richard

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0092, 192 358, 74335, 3644241, B60K 4128

Patent

active

051673118

ABSTRACT:
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 the 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 the transmission; a position detector (2f, 2g) provided in each of the 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 the position detector to position the piston rod at a given position of each gear; a speed detector (4a) in response to a signal from the position detector of the shift actuator to detect an operational speed of the piston rod of the shift actuator; and a decision maker (4b) in response to a signal from the speed detector to decide that a gear shift is faulted if the operation speed is lower than a reference speed for a predetermined time outside a synchromesh mechanism operational range of the transmission.

REFERENCES:
patent: 4621328 (1986-11-01), Arai et al.
patent: 4638690 (1987-01-01), Hattori et al.
patent: 4702127 (1987-10-01), Cote
patent: 4718307 (1988-01-01), Yabe et al.
patent: 4766774 (1988-08-01), Tamai
patent: 4796485 (1989-01-01), Ebina
patent: 4856360 (1989-08-01), Yoshimura et al.
patent: 4911031 (1990-03-01), Yoshimura et al.
patent: 4944194 (1990-07-01), Tanoue et al.
patent: 4945484 (1990-07-01), Cote et al.

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