Shift control system for automatic transmission

Details Shift control system for automatic transmission Shift control system for automatic transmission

1988-10-31

1990-08-28

Braun, Leslie A.

Machine element or mechanism

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

Preselected indexed position

B60K 4110

Patent

active

049515284

ABSTRACT:
A throttle presure and a modified throttle pressure which is higher than the throttle pressure are developed and the spool of the 2-3 shift valve arranged to be biased toward its downshift position by the throttle pressure when in its upshift position and toward its downshift position by the modified throttle pressure when in its downshift position. The difference between the throttle pressure and the modified throttle pressure is arranged to increase as the level of the throttle pressure decreases.

REFERENCES:
patent: 3895542 (1975-07-01), Miyauchi
patent: 4334442 (1982-06-01), Iwanaga et al.
patent: 4347764 (1982-09-01), Lauven
patent: 4537095 (1985-08-01), Morisawa

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