Hydraulic shift for motor vehicle transmission

Details Hydraulic shift for motor vehicle transmission Hydraulic shift for motor vehicle transmission

1987-09-24

1988-12-06

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60534, 60570, 60572, 92118, B60T 1126

Patent

active

047888210

ABSTRACT:
A hydraulic apparatus for remotely controlling the operative mode selector of a motor vehicle automatic transmission. The apparatus comprises a master cylinder having an input member operatively connected to the transmission operative mode selection or shift lever placed at the disposal of the motor vehicle operator, and a slave cylinder mounted on or proximate the transmission casing and having an output member connected to the transmission operative mode selector, the master cylinder and the slave cylinder being placed in fluid communication through flexible conduits such that each displacement of the master cylinder piston as a result of displacement of the master cylinder input member causes a corresponding displacement of the slave cylinder piston coupled to the slave cylinder output member. The master cylinder is provided with a built-in reservoir of hydraulic fluid connected to the working chambers, one on each side of the master cylinder piston, by valved passageways permitting flow of fluid from the reservoir to the low pressure chamber and closing the high pressure chamber from the reservoir so as to compensate for slow changes in hydraulic fluid volume due to expansion and contraction. The master cylinder and the slave cylinder are pivotably and adjustably mounted to a stationary support bracket by a ball and socket arrangement having an eccentric mounting aperture.

REFERENCES:
patent: 2648290 (1953-08-01), Ashton
patent: 3915516 (1975-10-01), Hildebrand
patent: 4030560 (1977-06-01), Parguet
patent: 4407125 (1983-10-01), Parsons
patent: 4423664 (1984-01-01), Buchl
patent: 4445334 (1984-05-01), Derrick
patent: 4532768 (1985-08-01), Focqueur
patent: 4607670 (1986-08-01), Compton

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