Hydraulic control system of an automatic transmission for a vehi

Details Hydraulic control system of an automatic transmission for a vehi Hydraulic control system of an automatic transmission for a vehi

1996-08-28

1998-09-15

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

475129, F16H 5704

Patent

active

058072080

ABSTRACT:
A hydraulic control system of an automatic transmission. A pressure regulator valve of the hydraulic control system includes a pressure reducing valve for reducing oil pressure created in an oil pump to a predetermined level; a duty solenoid valve for creating a solenoid pressure by draining the oil reduced in the pressure reducing valve according to duty level of a transmission control unit based on open level of a throttle valve; and a pressure regulator valve for supplying the controlled oil to a manual valve acting in relation to a shift lever by controlling pressure of the oil supplied directly from the oil pump based on the reduction of the fluctuation in shock in the pressure accumulating valve.

REFERENCES:
patent: 4283970 (1981-08-01), Vukovich
patent: 4388844 (1983-06-01), Arai et al.
patent: 5074167 (1991-12-01), Yoshimura et al.
patent: 5086668 (1992-02-01), Fijiwara et al.
patent: 5347886 (1994-09-01), Mainquist et al.

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