Electronically controlled automatic transmission control system

Details Electronically controlled automatic transmission control system Electronically controlled automatic transmission control system

1985-11-18

1986-12-30

Dorner, Kenneth J.

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74866, 74862, B60K 4106

Patent

active

046319824

ABSTRACT:
An electronically controlled automatic transmission control system for controlling an automatic transmission for a vehicle, comprising an electronic controller which receives functions on the basis of input signals corresponding to the running conditions of the vehicle to control a hydraulic controller including a fluid pressure source, shift control valves for changing over the connection of the fluid pressure source to the respective hydraulic servomotors of frictional engaging mechanisms which controls the operation of the components of a gear train included in the automatic transmission, solenoid valves adapted to be controlled by the electronic controller to change input signal pressures to the shift control valves and a manual selector valve having a spool capable of moving through predetermined set positions corresponding to the shift positions of the manual shift lever of the vehicle, in which the input signal pressure is supplied to one of the shift control valves, namely, 1-2 shift control valve, when the spool of the manual selector valve is shifted to a position corresponding to the neutral position, in order to improve the delayed operation of the automatic transmission in shifting the automatic transmission from the neutral or the parking position to the drive position.

REFERENCES:
patent: 3738199 (1973-06-01), Kubo et al.
patent: 3937108 (1976-02-01), Will
patent: 4308764 (1982-01-01), Kawamoto et al.
patent: 4346626 (1982-08-01), Kawamoto
patent: 4346627 (1982-08-01), Kawamoto et al.
patent: 4367528 (1983-01-01), Kawamoto et al.
patent: 4369671 (1983-01-01), Matsumoto et al.

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