| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the amount of recovery heat at high temperatures by suppressing a flow of exhaust gas to an exhaust heat recovery part when it is unnecessary to recover exhaust heat, in regard to exhaust heat recovery equipment. Ž<P>SOLUTION: An opening 5 of a punching pipe 6 is blocked. A relative physical relationship between a rear end of a bypass pipe 4 and the opening 5 of the punching pipe 6 is changed by a difference between thermal expansion caused by a cooling medium of the exhaust heat recovery part 3 and thermal expansion caused by an exhaust gas temperature of an exhaust gas inlet. By this, the bypass pipe 4 is thermally elongated by a displacement amount C when there is a need to suppress temperature rising of the exhaust gas due to a high load, and heat receival to cooling water from a radiator load. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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