Patent ID: 6986277
Filing Date: 2006-01-17
Classification: G01H,G01L,G01P,G10K

Abstract:
1. An engine knock sensor and mounting structure, said engine knock sensor comprising: an annular main body and an external connecting portion provided on an outer peripheral surface of said main body: said main body being comprised of a main cylindrical metal member which includes a cylindrical through-hole portion having a through-hole formed therein at a center portion thereof and a flange portion formed at an end of said through-hole portion adjacent to an internal combustion engine and extending outwardly in a circumferential direction of said through-hole portion, a piezoelectric element of a ring-like shape fixedly fit around said main cylindrical metal member and an armoring resin body covering said main cylindrical metal member and said piezoelectric element; said external connecting portion being formed integrally with said armoring resin body so that connecting conductors extending from said piezoelectric element are covered by said armoring resin body at a predetermined position in a circumferential direction of said main body; said knock sensor being fixedly secured on a mounting seat formed on a surface of said internal combustion engine for detecting vibration of said internal combustion engine transmitted to said piezoelectric element from said mounting seat by way of said main cylindrical metal member, said knock sensor further comprising a knock sensor side bearing portion provided on said knock sensor for engaging with said engine-side engaging portion, wherein said engine-side engaging portion is implemented in the form of an engaging stud disposed upstandingly at a location in the vicinity of said mounting seat, and wherein said knock sensor side bearing portion is constituted by said external connecting portion which is so formed as to project outwardly in a radial direction from said main body.