Hydraulic circuit construction for power shift transmission

Details Hydraulic circuit construction for power shift transmission Hydraulic circuit construction for power shift transmission

1986-04-11

1987-12-08

Bonck, Rodney H.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 85R, 192109F, B60K 4122

Patent

active

047113294

ABSTRACT:
A hydraulic circuit construction for a power shift transmission having logical operation valves mounted on a pressure oil supply passage connecting a hydraulic clutch to a pressure oil source, the logical operation valves being operable to engage and disengage the hydraulic clutch by opening and closing the pressure oil supply passage in response to a switching operation of a change speed device connected upstream of and in series to the hydraulic clutch. The pressure oil supply passage has mounted thereon a pressure control device including a first valve mechanism, a second valve mechanism and an orifice parallel-connected to the pressure oil supply passage, and an accumulator is mounted between the pressure control device and the hydraulic clutch to assure a speedy and smooth operation of the hydraulic clutch.

REFERENCES:
patent: 3896705 (1975-07-01), Patton
patent: 4046162 (1977-09-01), Rodeghiero
patent: 4265346 (1981-05-01), Emmadi
patent: 4289221 (1981-09-01), Chambers et al.
patent: 4469011 (1984-09-01), Loffler
patent: 4579015 (1986-04-01), Fukui

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