Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1987-10-15
1989-04-04
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74335, B60K 4118, B60K 2010
Patent
active
048174718
ABSTRACT:
The present invention is an electrical control apparatus for control of an automatic transmission in a motor vehicle. The automatic transmission has a motor for controlling the transmission state. The electrical control apparatus includes an operator input device, preferably a set of push buttons, for generating a desired transmission state signal, a transmission state sensing device for generating a present transmission state signal, and a logic control unit for control of the transmission motor. If the desired transmission state differs from the present transmission state, then the logic control unit generates either a clockwise motor drive signal or a counter-clockwise motor drive signal as needed to reach the desired transmission state. A motor drive circuit controls the motor for motion corresponding to the received drive signal. The control logic unit preferably also includes logic for inhibiting the generation of the clockwise and counter-clockwise motor control signals upon detection of an unsafe circumstance which would make a particular shift hazardous or harmful to the vehicle.
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2 pages from the Rolls Royce manual--"Electric System Transmission (Automatic Gearbox)".
SAE Technical Paper Series--Nov. 7-10, 1983.
SAE Technical Paper Series Feb. 27-Mar. 2, 1984.
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