Digital electronic controller for power transmission

Details Digital electronic controller for power transmission Digital electronic controller for power transmission

1975-09-29

1977-04-05

Scott, Samuel

Machine element or mechanism

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

Preselected indexed position

B60K 4106

Patent

active

040154882

ABSTRACT:
A power transmission system includes an engine-driven lockup type torque converter for driving a gear shift mechanism shiftable to different speed ranges by solenoid operated clutch valves. A digital electronic controller provides output signals to operate the solenoids of the clutch valves. The controller receives input signals from a manually operable multiposition electric shift range selector switch; from an output speed sensor on the gear shift mechanism; and from an engine throttle position (on-off) switch.
The controller comprises a counter circuit regulated by a system clock, for receiving amplified and shaped pulses from the speed sensor and for providing a counter signal related to gear shift mechanism output speed. The counter signals from the counter are presented to a speed matrix and signal pattern recognition circuits connected to the matrix ascertain whether certain speeds are reached. A shift logic circuit receives signals from the recognition circuits, from the range selector switch and from the throttle position switch and provides appropriate output signals to an up/down counter which in turn operates a decoder to provide control signals for operating solenoid driver circuits for the solenoids of the clutch valves.

REFERENCES:
patent: 3702572 (1972-11-01), Wakamatsu et al.
patent: 3805640 (1974-04-01), Schneider et al.

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