Transmission throttle valve for use in hydraulic control system

Details Transmission throttle valve for use in hydraulic control system Transmission throttle valve for use in hydraulic control system

1979-02-02

1981-06-16

Braun, Leslie

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74857, 74858, 74859, 74868, 74878, B60K 4100, B60K 4106

Patent

active

042730090

ABSTRACT:
A transmission throttle valve for use in a hydraulic control system of an automatic power transmission, comprising a valve spool contributing to the development of a throttle pressure, a valve plunger arranged in series with the valve spool and engaged by the accelerator pedal through a mechanical linkage for being movable toward and away from the valve spool as the accelerator pedal is moved toward and away from the released position thereof, a spring urging the valve spool and the valve plunger away from each other and a spring included in the mechanical linkage for urging the valve plunger to move in a direction opposite to the direction in which the valve plunger is to be moved when the accelerator pedal is depressed, wherein the valve plunger is formed with a pressure acting area for urging the valve plunger to move against the forces of the springs so that the vehicle driver is saved from an effort to overcome the force of the spring acting on the valve spool and plunger when in depressing the accelerator pedal.

REFERENCES:
patent: 2733732 (1956-02-01), Baker, Jr.
patent: 2832231 (1958-04-01), Edsall
patent: 3101011 (1963-08-01), Tuck et al.
patent: 3171433 (1965-03-01), Borman, Jr. et al.
patent: 3283606 (1966-11-01), Brueder
patent: 3703110 (1972-11-01), Uozumi et al.
patent: 3738198 (1973-06-01), Kell
patent: 3831465 (1974-08-01), Murakami
patent: 3840039 (1974-10-01), Shellman
patent: 4125038 (1978-11-01), Hiramatsu

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