| 摘要 |
<p>PURPOSE:To sufficiently exhibit interference suction effect between cylinders, by independently distributing suction passages from an enlarged chamber provided at the suction passages to each of the cylinders, arranging a pair of openings of the suction passages in opposed relation to each other in the enlarged chamber, and partitioning the enlarged chamber so as to include each pair of the openings in each chamber. CONSTITUTION:Suction air is induced through an air filter 5 and a throttle valve 7 in a single suction pipe 4 to independent enlarged chambers 8a and 8b as separated by a partition wall 14. A pair of independent suction passages 9 and 12 and suction passages 10 and 11 are provided in each of the enlarged chamber in such a manner that each pair of openings of the suction passages is opposed to each other, and are communicated with respective cylinders, 1A, 1D, 1B and 1C. With this arrangement, when pressure wave in the suction passage 9 reflects at an opening end 9a, for example, the pressure wave is transmitted to an opposite opening end 12a of the suction passage 12 to improve suction effect owing to interference between the cylinders. Especially, as each of the enlarged chambers is independent, the suction effect in one cylinder is not influenced by the other cylinders.</p> |
