Hydraulic servomechanism control system in automatic transmissio

Details Hydraulic servomechanism control system in automatic transmissio Hydraulic servomechanism control system in automatic transmissio

1993-01-04

1993-08-31

Lorence, Richard M.

Machine element or mechanism

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

Preselected indexed position

74866, 74867, B60K 4106

Patent

active

052398960

ABSTRACT:
Herein disclosed is a hydraulic servomechanism control system in an automatic transmission, for modulating the oil pressure of any hydraulic servomechanism to engage or release frictional engagement devices. The control system comprises: two pressure modulating mechanisms for modulating the oil pressure of said hydraulic servomechanisms; and a shutoff mechanism for shutting off, when one of said pressure modulating mechanisms is caused to communicate with said hydraulic servomechanism, the communication between the other pressure modulating mechanism and said hydraulic servomechanism.

REFERENCES:
patent: 4148232 (1979-04-01), Moriya
patent: 4690017 (1987-09-01), Taniguchi et al.
patent: 4700591 (1987-10-01), Yasue et al.
patent: 4722247 (1988-02-01), Shindo et al.
patent: 4727772 (1988-03-01), Sumiya et al.
patent: 4789937 (1988-12-01), Yasue et al.
patent: 4924731 (1990-05-01), Hayakawa et al.
patent: 4955256 (1990-09-01), Kashihara et al.

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