Back to results
US 2008/0073065 A1Published application
Method and apparatus to transfer heat to automatic transmission fluid using engine exhaust gas feed stream
AssigneeGM Global Technology Operations LLC
InventorsFarzad Samie, Richard W. Carlson, Thomas A. Robertson
Life of this patent
Estimating the term…
Abstract
Transmission fluid is heated through a heat exchanger effective to transfer heat between transmission fluid of a transmission assembly and an exhaust gas feed stream of an engine.
Claims10
Apparatus for heating transmission fluid, comprising:
- a heat exchanger effective to transfer heat between transmission fluid of a transmission assembly and an exhaust gas feed stream of an engine;
- and
- a flow valve for selectively controlling flow of said exhaust gas feed stream through said heat exchanger based upon temperature of said transmission fluid.
A method for heating transmission fluid with an exhaust gas feed stream from an engine, comprising:
- selectively operating an exhaust gas flow valve based upon temperature of transmission fluid from a transmission assembly;
- and
- diverting with said flow valve some portion of the exhaust gas feed stream from the engine into a heat exchanger to thermally couple said exhaust gas feed stream to said transmission fluid.
Dependencies are inferred from the claim text.