| 摘要 |
<p>PURPOSE:To aim at improvement in the distributability of fuel at a low load range, by making an inter diameter of a suction manifold smaller than that of a throttle bore of a horizontal type carburetor, and making another part's inner diameter in the suction manifold larger than that of the throttle bore. CONSTITUTION:A horizontal type carburetor 9 is attached to a convergent part 8a of a suction manifold 8, and this convergent part 8a is branched off to a single suction passage 8b leading to a first cylinder A1 and a common suction passage 8c leading to a second cylinder A2 and a third cylinder A3. And, an inner diameter of the convergent part 8a and an inner diameter of a connecting part to each of suction ports 5, 6 and 7 of respective suction passages 8b, 8d and 8e both are made smaller than that of a throttle bore of the carburetor 9, while another part's inner diameter in the suction manifold 8 is formed to be larger than the inner diameter of the throttle bore. With this constitution, the distributability of fuel at a low speed range is improvable.</p> |
