| 摘要 |
Heat exchangers, comprising first heat exchangers (H4, H3, H2) and a second heat exchanger (H1), wherein the first exchangers (H4, H3, H2) are disposed in exhaust ports (18) provided to the exhaust passages (33) of a multiple cylinder internal combustion engine, in a pre-catalytic device (34), and on the downstream side of a main catalytic device (35), respectively, and positioned independently of each other for each exhaust passage (33) and the second heat exchanger (H1) is disposed at a merged portion of the exhaust passages (33), whereby, because the first heat exchangers (H4, H3, H2) are disposed on the upstream side of the exhaust passages (33), a high heat exchanging efficiency can be obtained with hot exhaust gas and the output of the internal combustion engine can be prevented from being lowered by avoiding the occurrence of interference of exhaust gases and, because the second heat exchanger (H1) is disposed at the collecting portion of the exhaust passages ( 33), the heat exchanging efficiency can be increased by acting the pulsation-free exhaust gases produced by the merge. |
