Patent ID: 8333068

Claim:
An exhaust heat recovery device for recovering heat from exhaust gas of an engine, the exhaust heat recovery device comprising: a catalyst located to purify the exhaust gas; a heat recovery unit that includes an evaporation portion configured to evaporate an operation fluid flowing therein by performing heat exchange between the operation fluid and the exhaust gas, and configured to be capable of cooling the catalyst, a condensation portion configured to cool and condense the operation fluid flowing from the evaporation portion by performing heat exchange between the operation fluid and a coolant for cooling the engine, and a flow adjusting valve which adjusts a valve open degree of the flow adjusting valve to adjust a flow amount of the operation fluid flowing from the condensation portion to the evaporation portion; a catalyst temperature detector adapted to detect a temperature of the catalyst; and a control unit configured to set a catalyst heating mode when the temperature of the catalyst detected by the catalyst temperature detector is lower than a first threshold value, wherein the control unit causes the flow adjusting valve to adjust the flow amount of the operation fluid from the condensation portion to the evaporation portion to zero flow, in the catalyst heating mode.