| 摘要 |
PROBLEM TO BE SOLVED: To prevent reverse flow of exhaust gas which flows with exhaust gas reflux, and prevent contamination of a throttle valve by arranging an exhaust gas inflow passage so as to introduce exhaust gas which flows into an intake passage side to a main flow part having strong intake flow in the intake passage side. SOLUTION: In an exhaust gas reflux introducing part 9 composed of an outer ring 13 wherein a plurality of hole parts 12 are formed on a circumference at equal clearances, and an inner ring 14 whose one end is joined with an inner wall arranged upstream from the outer ring 13 along all circumference and the other end is separated from an inner wall of the outer ring 13, a bulkhead 18 is mounted between the inner ring 14 and the outer ring 13 which are separated from each other. The bulkhead 18 is formed so as to close right and left separating part of a clearance between the outer ring 13 and the inner ring 14, separating parts of upper/lower parts are opened so as to form an exhaust gas inflow passage 19. Exhaust gas is introduced into a main flow part of intake from upper and lower parts of a throttle valve positioned just upstream from an exhaust gas reflux introducing part 9.
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