Automatic transmission gear and clutch arrangement

US8105196B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Patrick S. Portell · Pinckney, US
• John A. Diemer · Farmington Hills, US
• James M. Hart · Belleville, US
• Scott H. Wittkopp · Ypsilanti, US
• Edwin T. Grochowski · Howell, US
• Douglas John Dwenger · Plymouth, US
• Elizabeth I. Wooden · Farmington Hills, US
• Boris Burgman · Oak Park, US
• Clinton E. Carey · Cadillac, US
• Tejinder Singh · Canton, US

Key dates

• Filing date: May 1, 2009
• Grant date: Jan 31, 2012
• Expiry date: May 15, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2200/2043
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members.