System for controlling automatic power transmission

Details System for controlling automatic power transmission System for controlling automatic power transmission

1991-07-15

1992-10-13

Lorence, Richard

Machine element or mechanism

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

Preselected indexed position

74866, B60K 4106

Patent

active

051541009

ABSTRACT:
An automatic power transmission control system includes a solenoid valve which is associated with an electric or electronic controller to receive therefrom a control signal. The solenoid valve generates a hydraulic control pressure in response to the control signal. The solenoid valve supplies the control pressure to a shift valve for switching shift valve position between a higher gear position and a lower gear position. The solenoid valve is also hydraulically communicated with a hydraulic device which performs desired operations associated with gear position shifting operation. The solenoid valve supplies the control pressure to the hydraulic device for controlling operation of the latter corresponding to the selected gear position.

REFERENCES:
patent: 4721018 (1988-01-01), Harada et al.
patent: 4722251 (1988-02-01), Sumiya et al.
patent: 4753134 (1988-06-01), Hayasaki
patent: 4807496 (1989-02-01), Hayasaki et al.
patent: 4843920 (1989-07-01), Hayasaki et al.
patent: 4879925 (1989-11-01), Taga et al.
patent: 4881429 (1989-11-01), Kobayashi et al.
patent: 4893527 (1990-01-01), Farnsawa

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