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US 2010/0304912 A1Published application
Transmission with Mechanically-Biased Clutch
AssigneeGM Global Technology Operations LLC
InventorKarl Andrew Sime
Life of this patent
Estimating the term…
Abstract
A transmission configured for receiving power from an engine is provided with a normally-closed clutch in order to permit operation in modes requiring closure of the clutch even when hydraulic power from a pump powered by the engine or by rotation of a transmission member is not available, or is not of a sufficient pressure.
Claims18
A transmission configured for receiving power from an engine comprising:
- an input member connectable with the engine;
- an output member;
- a stationary member;
- a transmission gearing arrangement operatively connected between the input member and the output member and including a plurality of rotatable gear members;
- a clutch having an engaged state and a disengaged state;
- wherein the clutch transmits torque between one of the gear members and another of the gear members, between said one of the gear members and the stationary member, or between the engine and the transmission when in the engaged state, and does not transmit torque when in the disengaged state;
- and
- wherein the clutch includes a mechanical member selectively movable to a biasing position in which the mechanical member is configured to retain the clutch in one of the engaged state and the disengaged state without application of power, including at least hydraulic, pneumatic, and electrical power.
5 more elements
A transmission configured to receive power from an engine, comprising:
- an input member and an output member;
- a transmission gearing arrangement including a plurality of intermeshing gear members;
- a stationary member;
- a plurality of clutches selectively engagable in different combinations to establish different operating modes between the input member and the output member;
- wherein each of the clutches is selectively engagable to transmit torque between different ones of the input member, the output member, and the gear members, or to ground one of the input member and the gear members to the stationary member;
- wherein the plurality of clutches includes at least one normally-closed clutch having an engaged state and a disengaged state;
- wherein the normally-closed clutch includes a mechanical member and is selectively engagable by movement of the mechanical member to a biasing position in which the mechanical member is configured to retain the clutch in the engaged state without application of power, including at least hydraulic, pneumatic, and electrical power.
4 more elements
Dependencies are inferred from the claim text.