Hydraulic control system

Details Hydraulic control system Hydraulic control system

1978-11-17

1981-09-15

Krizmanich, George H.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 8713, 192109F, F16D 2510

Patent

active

042892210

ABSTRACT:
A control system for use with dependent hydraulic clutches in which an accumulator valve (22) is used to provide improved engagement characteristics for the hydraulic clutch assembly (10). The accumulator valve includes back-to-back pistons (96, 100) separated by an outer spring (102) and an inner spring (104). Movement of the pistons provides an initial fast fill of the clutches, followed by a period of cushioned engagement, and then complete engagement. The dual spring arrangement provides two distinct periods of cushioned engagement.

REFERENCES:
patent: 3820417 (1974-06-01), Allen et al.
patent: 3831725 (1974-08-01), Schott
patent: 3948146 (1976-04-01), Maurer et al.
patent: 3985063 (1976-10-01), Lemon
patent: 4020934 (1977-05-01), Eichinger et al.
patent: 4046162 (1977-09-01), Rodeghiero

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