Transducer device for monitoring pressure.

摘要

Disclosed is a transducer assambly and diagnostic apparatus for processing an electrical signal which varies with the pressure changes occurring within an engine cylinder. The transducer assembly (100) consists of a U-shaped structure (104) integrally formed in a sandwich arrangement and encompassing a pressure-responsive crystalline element (106). The assembly is sized such that it substantially encompasses the shank (92) of a spark or glow plug (90) of the engine such that axial forces from within the cylinder excite the transducer through the plug to produce a signal which is processed in an electrical circuit to provide timing or other diagnostic information.