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US 2011/0209865 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, JR.
Life of this patent
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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.
Claims7
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;
- a flow valve for selectively controlling flow of said exhaust gas feed stream through said heat exchanger based upon temperature of said transmission fluid;
- and
- wherein said heat exchanger is thermally coupled to a sump of said transmission assembly, and said exhaust gas feed stream comprises an exhaust gas recirculation feed stream.
1 more element
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;
- a flow valve for selectively controlling flow of said exhaust gas feed stream through said heat exchanger based upon temperature of said transmission fluid;
- and
- wherein said heat exchanger is thermally coupled to an exhaust pipe.
1 more element
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;
- 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;
- and
- wherein the portion of the exhaust gas feed stream diverted into the heat exchanger is recirculated into an intake manifold of the engine.
1 more element
Dependencies are inferred from the claim text.