Abstract: A clamp that is locked to a body panel by inserting a flexible locking blade portion thereof into an installing hole and utilizing a return of the locking blade portion to an original state thereof when the locking blade portion exceeds the installing hole. The clamp comprises a resinous material having Rockwell hardness at 100 or more and 150 or less and molded by one-piece molding. When the clamp fits on the body panel, a fit-on sound and consciousness of a return of the locking blade portion to the original state are generated. In the clamp, an increase of an insertion force that is generated by increasing a hardness of the clamp is offset by increasing a height of a projection portion with respect to a substrate portion and decreasing an angle of the locking blade portion formed by turning down a front end of the projection portion to decrease a projection amount of the locking blade portion in a lateral direction thereof.

Abstract: The present invention is directed to a grommet that engages around an outer periphery of a wire harness and is inserted into a through hole of the automobile body. The grommet is provided with a generally cylindrical portion that tightly engages a wire of the wire harness and a generally conical portion extending from one end of the cylindrical portion. A thickened portion is provided around the conical portion in an enlarged end. A recess configured to be engaged with the automobile body is provided on an outer peripheral surface of the thickened portion. One side wall of the recess in the enlarged end extends outwardly and has a lip projecting from a tip of the extended side wall. A bottom surface of the recess has either a curved portion or an inclined portion so that an edge of the through hole of the automobile body panel is forcefully pressed into and distorts the curved or inclined portion.

Abstract: A grommet for a wire harness is provided that includes a small-diameter portion into which a wire harness is insertable and which is tightly contactable with the wire harness, a large-diameter portion having an engaging groove engageable with an inner peripheral edge of an automobile body panel, an extending portion extending past an end of the small-diameter portion along an axial direction thereof, and a lip portion radially projecting from an outer peripheral surface of the extending portion. The lip portion tightly contacts an inner peripheral surface of the insertion hole from inside when the grommet is mounted. The lip portion has a step portion including a first face and a second face respectively engageable with the inner peripheral surface and an outer surface adjacent to a peripheral edge of the insertion hole. Thus, the tightness of the seal between the grommet and a sound insulator secured on the automobile body panel is improved.

Abstract: An exhaust gas recirculating device in which the intake mixed fuel gas passageway is surrounded by a double wall tube which defines a ring shaped space therebetween. Recirculating exhaust gas is introduced into the ring shaped space to heat the inner tube of the double wall to ease vaporization of the wall stream of fuel and the exhaust gas is blown out from a narrowed outlet of the space so as to well mix the fuel gas mixture and the recirculating exhaust gas.