| 摘要 |
The present invention is provided with: a first side wall (41) disposed parallel to the outer surface further from a supercharger (13) and separated a predetermined distance from the outer surface; a second side wall (42) disposed parallel to the outer surface closer to the supercharger (13) and separated a predetermined distance from the outer surface; and a peripheral wall (43) that is disposed in a manner so as to be separated a predetermined distance from the outer surface along the peripheral direction, forms an opening (44) by means of both end surfaces (43a, 43b) thereof, one end surface (41a) of the first side wall (41), and one end surface (42a) of the second side wall (42), the two end surfaces excluding the aforementioned both end surfaces (43a, 43b) respectively contact the end surface of the first side wall (41) excluding the one end surface (41a) and the end surface of the second side wall (42) excluding the one end surface (42a), forming a space occluded within the opening (44). The opening (44) is formed in a manner so as not to face towards an internal combustion engine. |
