Control of an automatic vehicle power transmission

Details Control of an automatic vehicle power transmission Control of an automatic vehicle power transmission

1988-04-19

1990-02-13

Diehl, Dwight G.

Machine element or mechanism

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

Preselected indexed position

74862, B60K 4106

Patent

active

048996246

ABSTRACT:
A hydraulic control system for an automatic transmission including a pressure regulating valve responsive to a pilot pressure to produce a regulated line pressure which is applied through a switching valve to an actuator of a clutch. The switching valve is also responsive to the pilot pressure to allow the pilot pressure to be introduced to the actuator when the pilot pressure is below the predetermined value and passes the line pressure to the actuator when the pilot pressure is above the predetermined value.

REFERENCES:
patent: 3727487 (1973-04-01), Forster et al.
patent: 3855880 (1974-12-01), Ishimaru et al.
patent: 3859873 (1975-01-01), Miyauchi et al.
patent: 4296652 (1981-10-01), Oberpichler et al.
patent: 4501173 (1985-02-01), Honing
patent: 4680989 (1987-07-01), Sykora et al.
patent: 4779491 (1988-10-01), Fujiwara et al.
patent: 4787258 (1988-11-01), Yamamoto et al.

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