Pressure sensor for pressure measuring heater plug of internal combustion engine, has piezoelectric sensor units with substrative circuits, where one sensor unit is loaded with pressure signal and delivers electrical output signal

摘要

The sensor has piezoelectric sensor units (1, 1a) axially arranged in series. The sensor units have substrative circuits and same output characteristics. The sensor units are axially arranged in series. The sensor unit (1a) is loaded with a pressure signal by combustion pressure of an internal combustion engine and delivers an electrical output signal that corresponds to a mechanical pressure signal.