Park solenoid assembly for an internal electronic transmission range selection (ETRS) system
AssigneeGeneral Motors Corporation
InventorsStephen W. Powell, Mark A. Vernacchia
Life of this patent
Estimating the term…
Abstract
A solenoid assembly for implementation with an electronic transmission range selection (ETRS) system that shifts a transmission range between a park position and an out-of-park position. The solenoid assembly includes an extension arm biased against a member of the ETRS system. The extension arm is movable to an extended position to maintain the member in the out-of-park position. A solenoid is interconnected with the extension arm. The solenoid is operable to selectively move the extension arm between the extended position and a retracted position to selectively retain the member in the out-of-park position.
Claims18
A solenoid assembly for implementation with an electronic transmission range selection (ETRS) system that shifts a transmission range between a park position and an out-of-park position, comprising:
- an extension arm biased against a member of said ETRS system, said extension arm movable to an extended position to maintain said member in said out-of-park position;
- a solenoid interconnected with said extension arm, said solenoid operable to selectively move said extension arm between said extended position and a retracted position to selectively retain said member in said out-of-park position;
- and
- a plunger interconnecting said extension arm and said solenoid to pull said extension arm to said retracted position when said solenoid is de-energized.
An electronic transmission range selection (ETRS) system for shifting a transmission range of a transmission, comprising:
- a park servo valve movable between a first position to inhibit a first flow of pressurized fluid and a second position to enable said first flow of pressurized fluid;
- a hydraulic servo assembly movable between a first position and a second position based on said first flow of pressurized fluid;
- a detent lever assembly interconnected with said hydraulic servo assembly and rotatable between a first position and a second position;
- a solenoid assembly to selectively maintain said detent lever assembly in said second position, said solenoid assembly comprising:
- an extension arm biased against said detent lever assembly, said extension arm movable to an extended position to maintain said detent lever assembly in said second position;
- and
- a solenoid interconnected with said extension arm, said solenoid selectively operable to move said extension arm between said extended position and a retracted position to selectively retain said detent lever assembly in said second position.
Dependencies are inferred from the claim text.