To provide an exhaust heat recovery device which shortens catalyst warm-up time without requiring complicated structure of an exhaust pipe and control over a cooling water flow rate, in the exhaust heat recovery device including an exhaust heat recovery unit provided upstream of an exhaust gas flow from a catalyst in the exhaust pipe.
In this exhaust heat recovery device arranged upstream of the exhaust gas flow from the catalyst 12 in the exhaust pipe 11, a valve mechanism 150 adjusting the passage area of a return passage 134 is provided in the return passage 134 returning a working medium condensed by a condenser 130 to an evaporation section 110. A control section 160 closes the return passage 134 by the valve mechanism 150 when an internal combustion engine 10 is stopped or immediately before stopping or immediately after stopping, and maintains the closed state of the return passage 134 until the internal combustion engine is started next time and temperature Tc of the catalyst 12 reaches a predetermined catalyst temperature Tc1.
IKEMOTO NOBUAKI
KAMIYA NAOYUKI
IIDA HISASHI
| JP2009299638A | 2009-12-24 | |||
| JP2010059862A | 2010-03-18 | |||
| JPH0544445A | 1993-02-23 | |||
| JP2007333293A | 2007-12-27 | |||
| JPH0263209U | 1990-05-11 |
Taihei Nonobe
Takanori Kubo