Gm Global Technolgoy Operations, Inc.

Todd W Rooney

Brian W Whitmarsh

Mark A Vernacchia

Wayne B Vogel

Joshua E Lehrmann

William L Cousins

Kristopher Villegas

A synchronizer for a transmission of a motor vehicle is provided. The synchronizer includes a sleeve and a blocker ring. The sleeve includes sleeve spline teeth and advanced sleeve spline teeth. The blocker ring includes blocker spline teeth. The sleeve spline teeth and blocker spline teeth are each asymmetrical and have a blunt tip, a first angled side, and a second angled side. The first and second angled sides have different angular relationships to a longitudinal axis of the teeth.

Synchronizer having asymmetric blocker and sleeve teeth

The present invention provides a system for shifting or controlling a dual clutch transmission where the transmission may operate in at least a first mode of operation and a second mode of operation. The system includes a controller and a plurality of solenoids in fluid communication with a valve assembly. Selective activation of the solenoids by the controller engages the valve assembly to provide the first mode and the second mode of operation.

Control system for electronic range selection in a dual clutch transmission and for a differential in a transmission

Control system for electronic range selection in a dual clutch transmission

A control system for controlling an axle clutch between two half-axles in a motor vehicle is provided. The control system includes two solenoids and a pressure sensor in communication with a controller and a valve assembly. One of the solenoids provides a flow of fluid to engage the axle clutch. The valve assembly cooperates with another of the solenoids to disengage the axle clutch under certain conditions.

Control system for a differential in a transmission

A hydraulic control circuit for a transmission includes a plurality of solenoids and valves in fluid communication with a plurality of actuators. The actuators are operable to actuate a plurality of torque transmitting devices. Selective activation of the solenoids allows for a pressurized fluid flow to activate at least one of the actuators in order to shift the transmission into a desired gear ratio.

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Howell, MI, United States of America

Todd W Rooney