Invention Grant
- Patent Title: Vehicle exhaust heat recovery with multiple coolant heating modes and method of managing exhaust heat recovery
- Patent Title (中): 多种冷却液加热方式的车辆废热回收及废热回收管理方法
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Application No.: US12612134Application Date: 2009-11-04
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Publication No.: US08341951B2Publication Date: 2013-01-01
- Inventor: Gregory P. Prior , Daniel B. Glassford
- Applicant: Gregory P. Prior , Daniel B. Glassford
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn Law Group, PLLC
- Main IPC: F01N3/00
- IPC: F01N3/00 ; F01N3/02 ; F01N5/02 ; F01N1/00

Abstract:
An apparatus is provided for a vehicle with an engine that includes an exhaust system through which exhaust gas is discharged from the engine. A heat exchanger is positioned at least partially within the exhaust system. Coolant flow passages are provided in thermal communication with the engine and with the heat exchanger. A bypass valve is operable in a first mode to direct the exhaust gas across the heat exchanger along a first flow path to transfer exhaust heat to the coolant flow passages, and is further operable in a second mode to direct at least a portion of the exhaust gas across the heat exchanger along a second flow path to transfer exhaust heat to the coolant flow passages in a second coolant heating mode. The second flow path is restricted relative to the first flow path. A method of managing exhaust heat recovery is also provided.
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