System for controlling servo activating hydraulic pressure occur

Details System for controlling servo activating hydraulic pressure occur System for controlling servo activating hydraulic pressure occur

1988-08-09

1990-07-10

Diehl, Dwight

Machine element or mechanism

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

Preselected indexed position

74867, B60K 4106

Patent

active

049399560

ABSTRACT:
According to the present invention, in order to effect a shockless shift in an automatic transmission of a vehicular power train, a servo activating hydraulic fluid pressure applied to a shifting friction unit is controlled in response to a predetermined variable other than an engine throttle opening which causes a change in engine output torque from a predetermined pattern of variation of the engine output torque against variation of the engine throttle opening.

REFERENCES:
patent: 3956947 (1976-05-01), Leising et al.
patent: 4572031 (1986-02-01), Yokooku et al.
patent: 4616521 (1986-10-01), Akashi et al.
patent: 4622866 (1986-11-01), Ito et al.
patent: 4630583 (1986-12-01), Suzuki et al.
patent: 4677878 (1987-07-01), Yamamori et al.
patent: 4703304 (1987-10-01), Muguruma et al.
patent: 4720793 (1988-01-01), Watanabe et al.
patent: 4760823 (1988-08-01), Yasuoka et al.
patent: 4809660 (1989-03-01), Marsh et al.

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