STRUCTURE OF EXHAUST MANIFOLD OF VEHICLE FOR REDUCING FATIGUE-STRESS DUE TO HEAT AND IMPROVING DURABILITY OF COLLECTORS BY MAXIMALLY SPACING GAS CONFLUENCE PARTS OF COLLECTORS FROM WELDED PARTS OF PASSAGES

摘要

Purpose: the structure setting of an exhaust manifold of a vehicle, due to heat, is transferred to the part to be welded in the channel from the gas confluence part of collector at fatigue-pressure is reduced due to hot pressing thermal damage. Construction: first and fourth lane (16a, 16b) and second and third channel (17a, 17b) coupling part (B) coupling part (a), a pair of of arrangement of reinforcement edge (31,33) is asymmetrically formed. By the welding at the first arrangement of reinforcement edge, first and fourth lane be connected with each other. By the welding at the first arrangement of reinforcement edge, second and third channel be connected with each other. The part to be welded at first and second arrangement of reinforcement edge is prevented from heat and is compromised by the heat shifted from gas confluence component (16c, 17c).