Line pressure control system for an automatic transmission

Details Line pressure control system for an automatic transmission Line pressure control system for an automatic transmission

1987-08-28

1989-05-23

Scherbel, David A.

Machine element or mechanism

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

Preselected indexed position

74843, B60K 4114

Patent

active

048318965

ABSTRACT:
A microcomputer is provided for controlling an automatic transmission for a motor vehicle. The microcomputer operates to control line pressure in a hydraulic circuit for the automatic transmission. A control circuit is provided to respond to an output signal of the microcomputer for energizing a solenoid to control the line pressure. A driving circuit is provided to respond to closing operation of a starting motor switch of an engine to energize the solenoid to reduce the line pressure.

REFERENCES:
patent: 4417641 (1983-11-01), Kageyama
patent: 4511014 (1985-04-01), Makita
patent: 4515257 (1985-05-01), Takano et al.
patent: 4546073 (1985-10-01), Shigematsu et al.
patent: 4702083 (1987-10-01), Nakamura et al.

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