Hydraulic pressure modulation device

Details Hydraulic pressure modulation device Hydraulic pressure modulation device

1982-06-29

1985-12-24

Bonck, Rodney H.

192 clutches and power-stop control

Transmission control and clutch control

Common control

91 29, 137110, 192 4A, 192 52, 192109F, B60K 4126, F16D 2511

Patent

active

045600449

ABSTRACT:
A hydraulic pressure modulation device disposed between a hydraulic pressure source and a selector valve comprising a cylinder; a spool fitted into the cylinder; an accumulator; an actuation chamber formed in the cylinder; a passage openly connecting the chamber to the selector valve; a spring forcing the spool against a pressure in the chamber; a first passage openly connecting the pressure source to the selector valve; a second passage operable to introduce the oil from the pressure source into the accumulator while the outlet pressure of the device increases from a first value to a second value; and a third passage operable to connect the accumulator to an oil tank substantially after the second passage is closed, the passages being formed in the cylinder and the spool.

REFERENCES:
patent: 3089572 (1963-05-01), Merfurth
patent: 3444762 (1969-05-01), Golan et al.
patent: 3444968 (1969-05-01), Golan et al.
patent: 3820417 (1974-06-01), Allen et al.
patent: 4046162 (1977-09-01), Rodeghiero
patent: 4135610 (1979-01-01), Charrerjea
patent: 4465168 (1984-08-01), Sato

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