| 摘要 |
PROBLEM TO BE SOLVED: To provide an aggregate structure of an exhaust manifold which reduces exhaust resistance, and enhances engine output by improving exhaust pulsating pressure. SOLUTION: In the aggregate structure of the exhaust manifold, exhaust gas downstream side ends 2a and 3a of two branch pipes 2 and 3 are connected to an exhaust gas upstream side end 6a while having a narrow angle with each other, and an exhaust gas upstream side end 8a of a connecting pipe 8 is connected to an exhaust gas downstream side end 6c. A part between the exhaust gas upstream side end 6a and the exhaust gas downstream side end 6c in side walls 11 and 12 in an aggregate part 6 is expanded to an outside almost in an arc shape. COPYRIGHT: (C)2008,JPO&INPIT
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