| 摘要 |
<p>PURPOSE:To improve stiffness for supporting air intake ducts as well as to sufficiently control amplified vibration by fixing the outer wall of the air intake ducts arranged at the upstream side of an air intake collector onto the outer wall of a branch for fixing the air intake collector on a cylinder head, so as to be supported. CONSTITUTION:An air intake collector 15 is arranged on one side of plural rocker covers 13, which is arranged at the upper sections of plural cylinder heads 12 in an internal combustion engine 11. A plurality of the first branches 16 through 21 are connected with the air intake collector 15 at its downstream side, and an air intake duct 22 is connected with the collector at its upstream side. In this case, the center section 22c of the air intake duct 22 at the upstream side is arranged close to the center section 21c of the first branch 21 while being bent. Then, the respective center sections 22c and 21c are welded with each other so that the air intake duct 22 at the upstream side is fixed onto the first branch 21 so as to be supported via a welded section 29. By this constitution, stiffness for supporting the air intake duct 22 at the upstream side is improved, amplified vibration can thereby be sufficiently restrained.</p> |
