| 摘要 |
<p>PURPOSE:To compactly arrange independent intake passages with their data such as the passage lengths unified for individual cylinders by forming them so that the radius of curvature of the curve section for the independent intake passage of a cylinder near to the connection face of a collection section is made larger than that for the independent intake passage of a cylinder apart from the connection face. CONSTITUTION:Independent intake passages 5a-5d communicated to individual cylinders respectively are extended to one side in the cylinder train direction above an engine 1 and curved and collected on the connection face 11 of an intake collection section 6. The independent intake passage of a cylinder near to the connection face 11 of the intake collection section 6 is shorter than the independent intake passage of a cylinder apart from the connection face 11 of the intake collection section 6, i.e., in the order of the independent intake passages 5d, 5c, 5b, 5a, e.g. the independent intake passage 5b is shorter than the independent intake passage 5, thus the radius of curvature of the second curve section 22 is made larger than that of the first curve section 21 to extend the passage length, and the independent intake passages 5a-5d are connected to the connection face 11 of the intake collection section 6 respectively.</p> |
