Electronic controller for automatic transmissions
This patent describes, in an automotive vehicle, an electronic transmission controller for an automatic transmission having neutral, reverse, forward and park ranges and subject to range selection by electrical signals from the controller. The controller comprising: speed sensors for sensing vehicle speed and engine speed, ignition sensors for sensing whether the ignition is on and whether the key is in the ignition switch, means for controlling the transmission park range in response to preset values of sensed vehicle conditions including programmable electronic means coupled to the sensors for producing electrical signals for range selection. The electronic means being programmed to limit the transmission to park range on the basis of prescribed sensor conditions. The vehicle being equipped with a power operated parking brake and wherein the electronic means produced a brake signal, and actuator means responsive to the brake signal for applying the parking brake when the transmission is shifted to its park range.
- Assignee:
- Sparton Corp., Jackson, MI
- Patent Number(s):
- US 4892014; A
- Application Number:
- PPN: US 7-150985A
- OSTI ID:
- 6966222
- Resource Relation:
- Patent File Date: 1 Feb 1988
- Country of Publication:
- United States
- Language:
- English
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