Patent ID: 9404458
Filing Date: 2016-08-02
CPC Classification: F02F,F02M

Claim Text:
1. A fuel injection valve damping insulator that damps vibration produced in a fuel injection valve, the fuel injection valve being installed in a cylinder head in a state inserted into an insertion hole provided in the cylinder head, a shoulder portion being formed widening out in an annular shape at an inlet portion of the insertion hole, the fuel injection valve including a stepped portion in which a diameter thereof increases in a tapered shape so as to have a tapered surface that faces the shoulder portion, and the damping insulator being interposed between the stepped portion and the shoulder portion, the fuel injection valve damping insulator being by comprising: a tolerance ring that is an annular shape that abuts against the tapered surface; and an elastic member that is arranged between the tolerance ring and the shoulder portion, wherein the elastic member is formed in an annular shape corresponding to a bottom surface of the tolerance ring to damp vibration produced in the fuel injection valve; a coil spring that is arranged in an annular shape corresponding to the annular shape of the elastic member, and an annular sleeve that is juxtaposed to the coil spring, are embedded in the elastic member; and the sleeve is such that a height thereof is formed lower than an outer diameter of individual small ring portions that form a helix of the coil spring, and at least one of the tolerance ring side and the shoulder portion side of the sleeve is buried in the elastic member.