Hydraulic circuit for controlling automatic transmission

Details Hydraulic circuit for controlling automatic transmission Hydraulic circuit for controlling automatic transmission

1986-03-31

1988-03-01

Bonck, Rodney H.

Machine element or mechanism

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

Preselected indexed position

74869, 74866, 74752A, 192 12R, 192 13R, B60K 4122, B60K 4128

Patent

active

047277734

ABSTRACT:
A hydraulic circuit for controlling an automatic transmission. The hydraulic circuit has a control valve connected between a shift valve and a hydraulic servomotor for actuating a frictional engagement element such as a brake in a main transmission unit. The control valve is controlled by a signal from a control means in such a manner that, when the hydraulic servomotor is drained by the operation of the shift valve to disengage the brake, the engagement of a frictional engaging element in another transmission unit is synchronized therewith.

REFERENCES:
patent: 3752011 (1973-08-01), Casey et al.
patent: 3956947 (1976-05-01), Leising et al.
patent: 4021712 (1977-05-01), Ishihara et al.
patent: 4324321 (1982-04-01), Ushijima et al.
patent: 4360092 (1982-11-01), Muller et al.
patent: 4367528 (1983-01-01), Kawamoto et al.
patent: 4497222 (1985-02-01), Nagaoka et al.
patent: 4527678 (1985-07-01), Pierce et al.

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