Hydraulic control device for an automatic transmission

Details Hydraulic control device for an automatic transmission Hydraulic control device for an automatic transmission

1989-01-04

1990-05-15

Diehl, Dwight G.

Machine element or mechanism

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

Preselected indexed position

74867, B60K 4106

Patent

active

049247310

ABSTRACT:
An orifice is installed on an oil passage to a hydraulic servo for a direct clutch. In forward high speed running, a line pressure from the D range port of a manual valve is supplied to the hydraulic servo through an oil passage used for forward high speed running and a three way cock (non manual type). Then comparatively large amount of oil is supplied to the servo in accordance with the high speed running. In reverse running, the line pressure from the R range port of the manual valve is supplied to the servo through the orifice and the three way cock. Consequently, comparatively small amount of oil is supplied to the hydraulic servo.

REFERENCES:
patent: 3937108 (1976-02-01), Will
patent: 4274308 (1981-06-01), Iwanaga et al.

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