KLOPFSENSOR

摘要

A knock sensor for direct or indirect attachment to an internal combustion engine has a housing (10) with a pressure sleeve (11), on the outside of which are fitted a piezoceramic plate, a seismic mass (16) acting thereon, the contact plates (14) and the insulating plates (13). The insulating plates (13) or the piezoceraminc plate (15) are slightly electrically conductive so that the voltage peaks produced by the pyroelectric effect can easily be diverted. It is thus possible to prevent erroneous measurements and interference in the electric circuit connected to the knock sensor.