Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1985-07-19
1987-01-06
Dorner, Kenneth J.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74868, 74752C, B60K 4116
Patent
active
046337385
ABSTRACT:
A control system for a four speed ratio automatic transmission wherein a ratio change from a first speed ratio to a second speed ratio is effected by a 1-2 shift valve that activates a fluid pressure operated second ratio clutch and a ratio change from a third speed ratio to a fourth speed ratio is effected by a 3-4 shift valve that activates a fluid pressure operated fourth ratio brake, both the clutch and the brake having an independent pressure accumulator and an accumulator pressure regulator valve that is common to both accumulators for developing unique accumulator control pressures whereby the system may be calibrated for maximum shift smoothness for both 1-2 upshifts and 3-4 upshifts.
REFERENCES:
patent: 3027783 (1962-04-01), Kelley
patent: 3309939 (1967-03-01), Pierce, Jr.
patent: 3327554 (1967-06-01), Searles
patent: 3344681 (1967-10-01), Searles
patent: 3400612 (1968-09-01), Pierce, Jr.
patent: 3613484 (1971-10-01), Pierce et al.
patent: 4161895 (1979-07-01), Ushijima et al.
patent: 4499789 (1985-02-01), Kuramochi et al.
Dorner Kenneth J.
Ford Motor Company
Harrington Donald J.
Wright D.
Zerschling Keith L.
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