Electronic controller for automatic transmissions

Details Electronic controller for automatic transmissions Electronic controller for automatic transmissions

1988-02-01

1990-01-09

Diehl, Dwight G.

Machine element or mechanism

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

Preselected indexed position

74861, 192 4A, 192 4C, B60K 4106

Patent

active

048920142

ABSTRACT:
A microprocessor controlled automatic transmission range shift selector positions the range shift valve in accordance with a shift request by an electric motor. A feedback transducer provides valve position information for motor control purposes. Vehicle conditions transducers including a door switch, a seat switch, vehicle speed and RPM sensors, ignition circuit status and key presence detectors, a parking brake sensor and a foot brake switch provide inputs to the microprocessor which is programmed to determine appropriate shifts to prevent requested range shifts in some cases and automatically initiating shifts into park in other cases. An automatic parking brake actuator and door lock actuators are also controlled by the microprocessor system.

REFERENCES:
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patent: 2970679 (1961-02-01), Suller et al.
patent: 3895698 (1975-07-01), Fontaine
patent: 3937105 (1976-02-01), Arai et al.
patent: 3942614 (1976-03-01), Thompson
patent: 4187935 (1980-02-01), O'Hern
patent: 4355698 (1982-10-01), Barnes et al.
patent: 4392544 (1983-07-01), Dilno
patent: 4558612 (1985-12-01), Shimizu et al.
patent: 4583171 (1986-04-01), Hara et al.
patent: 4629043 (1986-12-01), Matsuo et al.

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