| 摘要 |
<p>PROBLEM TO BE SOLVED: To secure a high particulate collecting rate by arranging a particulate collecting filter in each exhaust branch passage for communicating an exhaust collecting part with each cylinder, and communicating the respective exhaust branch passages, positioned on the exhaust upper reaches of each filter, with one another by communicating passages. SOLUTION: In an exhaust manifold 20 composed of an exhaust collecting part 21 and exhaust branched passages 22-25 communicating the exhaust collecting part 21 with each cylinder, particulate collecting filters 42-45 are interposed at upward extended parts of the respective exhaust branched passages 22-25, and adjacent exhaust side exhaust branch passage parts 22a-25a are communicated by communicating passage 32-34. The exhaust pressure of the exhaust branched passage part 22a connected to the cylinder in an exhaust stroke is higher than the exhaust pressure of the other three exhaust branched passage parts 23a-25a, but the exhaust pressure of the respective exhaust branched passage parts 22a-25a are made almost equal by communicating the exhaust branched passage parts 22a-25a with one another so as to impede contraflow of exhaust gas.</p> |
