| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent freezing and fixation of the valve of an EGRV and to prevent the erosion of a bushing. <P>SOLUTION: A plurality of stripe-shape recessed grooves 42, 43 are formed on the surface (both side end faces) of the valve 3 of the EGRV so as to avoid the invasion into the interior of the bearing receiving hole 11 of the housing 1 in particular into the slide clearance between the bushing 21 and the slide part 26. Specifically, the plurality of stripe-shape convex grooves 42 extending straight in a vertical direction perpendicular to the rotational axis direction of the shaft 4 are arranged. Further, a plurality of stripe-shape recessed grooves 43 curvedly extending in an arc shape are arranged so as to bypass the opening end fringe of the fitting groove 41 of the valve 3. Consequently, water drops sticking to the surface of the valve 3 can be discharged to the outside of the valve (interior of the EGR gas channel 9) while preventing water drops sticking to the surface of the valve from coming into the interior of the bearing hole 11 of the housing 1 in particular into the slide clearance between the bushing 21 and the slide part 26. <P>COPYRIGHT: (C)2012,JPO&INPIT |
