| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent influence of gas introduction on an intake air swirl control valve in a structure wherein a gas introduction passage is formed in a separation part of two manifold arrangements and the intake air swirl control valve is arranged in a downstream side. <P>SOLUTION: Tumble control valves (TCV) 38 and 40 are arranged on the downstream side from the gas introduction passage 30 and the upstream side from a position of an opening part 32b of a gas branch passage 32 in intake passages 4a-8a and 12a-16a. The TCVs 38 and 40 are nearer to combustion chambers of respective cylinders than the gas introduction passage 30, and thereby, swirls can be suitably generated in the combustion chambers. Further, the TCVs 38 and 40 are not exposed to EGR gas, and deposit adhesion and condensed water adhesion can be effectively prevented. The gas branch passage 32 is branched from the lowermost part of the gas introduction passage 30, and therefore, condensed water can be rapidly and surely delivered to the downstream side compared to the TCVs 38 and 40, and staying or freezing of water in the gas introduction passage 30 can be prevented during stop of the internal combustion engine. <P>COPYRIGHT: (C)2010,JPO&INPIT |
