Hydraulic forward/reverse shift fork control for a power transmi

Details Hydraulic forward/reverse shift fork control for a power transmi Hydraulic forward/reverse shift fork control for a power transmi

1993-08-10

1995-06-20

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

74347, 477116, 477127, B60K 4106

Patent

active

054256887

ABSTRACT:
A shift fork for a forward-reverse shift mechanism has a hydraulic piston portion for moving the shift fork. The piston is controlled by a hydraulic valve system. The valve system is effective to delay the engagement of the respective forward and reverse, hydraulically-operated, torque transfer devices. The shift fork will enforce the establishment of the proper power path through a synchronizer prior to the engagement of the torque transfer control devices.

REFERENCES:
patent: 2719436 (1955-10-01), Nallinger
patent: 3688607 (1972-09-01), Marlow
patent: 4290325 (1981-09-01), Nishimura
patent: 4616531 (1986-10-01), Ogasawara et al.
patent: 5179874 (1993-01-01), Hunter
patent: 5233878 (1993-08-01), Klemen et al.

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