| 摘要 |
An internal combustion engine waste heat recovery system is provided in which a second heat exchanger (H2), a fifth heat exchanger (H5), a fourth heat exchanger (H4), a third heat exchanger (H3), and a first heat exchanger (H1) are disposed sequentially from the upstream side to the downstream side of the flow of exhaust gas in an exhaust passage (33) of an internal combustion engine, and water as a working medium is supplied sequentially to the first heat exchanger (H1), the second heat exchanger (H2), the third heat exchanger (H3), the fourth heat exchanger (H4), and the fifth heat exchanger (H5). Water having the lowest temperature can be supplied to the first heat exchanger (H1) on the most downstream side of the flow of exhaust gas, to which exhaust gas having a comparatively low temperature is supplied, thus increasing the heat exchange efficiency, and water having a comparatively low temperature, which has passed only through the first heat exchanger (H1), can be supplied to the second heat exchanger (H2) on the most upstream side of the flow of exhaust gas, thus cooling effectively a high temperature section immediately downstream from an exhaust valve (25) of the internal combustion engine. In this way, the high temperature exhaust passage (33) immediately downstream from the exhaust valve (25) can be cooled effectively while maintaining the efficiency of waste heat recovery from the exhaust gas of the internal combustion engine. |
