EXHAUST HEAT RECOVERY DEVICE
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United States of America Patent
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N/A
Issued Date -
Feb 26, 2009
app pub date -
Feb 22, 2006
filing date -
Feb 23, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An exhaust heat recovery device provided in an exhaust system of an engine etc., having a heat exchanger for performing heat exchange between exhaust gas and a medium, a bypass route through which the exhaust gas bypasses the heat exchanger, and a valve body for opening and closing the bypass route, wherein wiring and piping are reduced to make the device advantageous in cost. The exhaust heat recovery device has a valve body that, when the flow rate of the exhaust gas is equal to or higher than a predetermined value, opens the bypass route from a closed state against urging force of an urging body. The exhaust heat recovery device also has a temperature-activated actuator that opens the valve body when the temperature of the medium is equal to or higher than a predetermined value. The construction causes the valve body to be opened when at least either of the flow rate of the exhaust gas and the temperature of the medium is equal to or higher than the predetermined value.
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