In a default-to-park system for a transmission, a lever member has a cylindrical hub configured to rotate about a spindle. The lever member has a transverse plate including a lever arm connected to a park release actuator and to a link to a park pawl of the transmission. Under normal operation, a transmission controller shifts the actuator to turn the lever arm and release the park pawl so the transmission can rotate. In an absence of a signal from the controller to the actuator, a bias spring restores the lever arm so that the transmission is locked. The bias spring comprises torsion coils disposed over the hub, a fixed end, and a drive end. The drive end has a heel segment bearing against a transverse surface of the transverse plate facing the torsion coils and a loading hook wrapped around an edge of the transverse plate.
ANTI-TILT FEATURE FOR TORSION SPRING FOR DEFAULT-TO-PARK LEVER
2017-05-11
Patent
Electronic Resource
English
ANTI-TILT FEATURE FOR TORSION SPRING FOR DEFAULT-TO-PARK LEVER
European Patent Office | 2017
|Anti-tilt feature for torsion spring for default-to-park lever
European Patent Office | 2017
|