| 摘要 |
PROBLEM TO BE SOLVED: To suppress heat conduction from EGR gas to a driving part 3 in an EGR apparatus 1 equipped with a flow passage forming part 2 and the driving part 3 separately and having them coupled integrally via a screw 6.SOLUTION: An arm part 7 is integrally formed with a housing 16, protrudes from the housing 16 away from the housing 16 and not to make contact with a flow passage forming part 2 and a flow passage-side fastening part 4 to form corner parts 23a and 23b, and has a drive-side fastening part 5 at the tip of the corner part 23b. Hence, after heat of EGR gas is transferred to the drive-side fastening part 5 in the arm part 7, it is transferred to the housing 16 through the corner parts 23b and 23a. Thus, a heat conduction path from the EGR gas to the driving part 3 can be extended to increase heat conduction resistance, and in addition, a heat dissipation area into the air can be enlarged to increase the heat dissipation amount into the air. As above, heat conduction from the EGR gas to the driving part 3 can be suppressed in an EGR apparatus 1. |
