Control valve system for a four-speed automatic power transmissi

Details Control valve system for a four-speed automatic power transmissi Control valve system for a four-speed automatic power transmissi

1985-07-19

1987-01-20

Dorner, Kenneth J.

Machine element or mechanism

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

Preselected indexed position

74867, B60K 4116

Patent

active

046372814

ABSTRACT:
A control valve system for a four speed automatic transmission wherein a single valve mechanism acts in combination with a 2-3 shift valve, a 3-4 shift valve and a torque sensor throttle valve to control heavy throttle 2-3 upshifts, light throttle 2-3 upshifts, light throttle 3-4 upshifts, heavy throttle 3-4 upshifts, heavy throttle 3-2 downshifts and coasting downshifts to provide maximum smoothness in the engagement and release of fluid pressure operated ratio control servos.

REFERENCES:
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: 4331046 (1982-05-01), Leonard et al.
patent: 4413536 (1983-11-01), Whitney et al.
patent: 4432255 (1984-02-01), Borman et al.
patent: 4509389 (1985-04-01), Vahratian et al.

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