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Title: Exhaust bypass flow control for exhaust heat recovery

Patent ·
OSTI ID:1221376

An exhaust system for an engine comprises an exhaust heat recovery apparatus configured to receive exhaust gas from the engine and comprises a first flow passage in fluid communication with the exhaust gas and a second flow passage in fluid communication with the exhaust gas. A heat exchanger/energy recovery unit is disposed in the second flow passage and has a working fluid circulating therethrough for exchange of heat from the exhaust gas to the working fluid. A control valve is disposed downstream of the first and the second flow passages in a low temperature region of the exhaust heat recovery apparatus to direct exhaust gas through the first flow passage or the second flow passage.

Research Organization:
GM Global Technology Operations LLC, Detroit, MI (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-04NT42278
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
Patent Number(s):
9,140,168
Application Number:
12/752,648
OSTI ID:
1221376
Resource Relation:
Patent File Date: 2010 Apr 01
Country of Publication:
United States
Language:
English

References (7)

Exhaust element with heat exchanger patent November 2000
Exhaust gas recirculation with condensation control patent April 2002
Exhaust gas heat exchanger patent April 2006
Heating and/or cooling system for a motor vehicle patent February 2010
Thermotunneling devices for motorcycle cooling and power generation patent September 2010
High efficiency internal combustion engine patent December 2011
Vehicle exhaust heat recovery with multiple coolant heating modes and method of managing exhaust heat recovery patent January 2013