METHOD FOR CONTROLLING EXHAUST GAS HEAT RECOVERY SYSTEMS IN VEHICLES
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United States of America Patent
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N/A
Issued Date -
May 3, 2012
app pub date -
Oct 29, 2010
filing date -
Oct 29, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of operating an exhaust gas heat recovery (EGHR) system in a vehicle including an engine, a transmission, and an EGHR heat exchanger is provided. The method includes monitoring an engine water temperature and may include monitoring a transmission oil temperature and an ambient air temperature. The method includes comparing the monitored engine water temperature to one or more calibrated engine temperatures. Based upon the monitored temperatures and comparison to the calibrated temperatures, the method controls a two-way valve. The two-way valve is configured to be set to one of an engine position and a transmission position. The engine position allows heat-exchange communication between the EGHR heat exchanger and the engine, and the transmission position allows heat-exchange communication between the EGHR heat exchanger, the transmission, and the engine.
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