| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a thermoacoustic engine has poor startability in a conventional vehicle equipped with the thermoacoustic engine for recovering waste heat of an internal combustion engine. SOLUTION: A waste heat recovery device for the internal combustion engine according to the invention has the thermoacoustic engine 11 comprising a heat accumulator 13 incorporated in a gas column pipe 12 filled with working fluid, a heat transfer member 14 for recovering the waste heat of exhaust gas from the internal combustion engine 10 and for heating the working fluid on an one end surface side of the heat accumulator 13 and a low-temperature side heat exchanger 15 for cooling the working fluid on the other end surface side of the heat accumulator 13. The waste heat recovery device is equipped with a branch pipe 34 branching from the middle of an exhaust pipe 24 and passing through the gas column pipe 12 and the heat transfer member 14 at the one end surface side to the heat accumulator 13, a shutter 35 for introducing a part of the exhaust gas into the branch pipe 34 and for heating the working fluid on the one end surface side of the heat accumulator 13 through the branch pipe 34, an operation judgment means for judging whether or not thermoacoustic self-excited vibration of the working fluid is started and a control means 26 for controlling operation of a switching means based on the judgment result of the judgment means. COPYRIGHT: (C)2006,JPO&NCIPI
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