Transmission shift mechanism

Details Transmission shift mechanism Transmission shift mechanism

1988-10-11

1989-06-20

Wright, Dirk

Machine element or mechanism

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

Preselected indexed position

74337, 74626, F16H 552, B60K 4122

Patent

active

048400912

ABSTRACT:
Disclosed is a mechanism in a motor vehicle for hydraulically selecting the gears of an automatic transmission. The mechanism is a valve connected to a pressure source and having two sets of outlet ports, one set controlled by a manually operated linkage. The other set of outlet valves is controlled by a gear-shift mechanism responsive to reaction torque on an output shaft. The gear shift mechanism includes a planetary gear set connected between the output shaft and an input shaft leading from the transmission. The planetary gear set has a ring gear linked to a lever rotating an apertured ring in the housing. Rotating the ring selectively opens or blocks access to ports of the second set. The linkage between the planetary gear set and the valve has means to bias the planetary gear to a position corresponding to the "drive" mode of the automatic transmission.

REFERENCES:
patent: 1948709 (1934-02-01), Hackethal
patent: 2260406 (1941-10-01), Roche
patent: 2957558 (1960-10-01), Croucher
patent: 3527118 (1970-09-01), Jenson et al.
patent: 4282776 (1981-08-01), Eller
patent: 4420994 (1983-12-01), Muller et al.
patent: 4616528 (1986-10-01), Malinski et al.

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