A Cylinder Pressure Sensor for Closed Loop Engine Control

Automakers are developing advanced engine control systems which use real time combustion pressure measurements as the primary feedback variable. These systems use closed loop control of engine input parameters such as spark timing to optimize fuel economy, performance, driveability, and emissions. Production applications for these systems require a reliable cylinder pressure sensor (CPS) with performance suitable for engine control functions. This paper describes the design, application, and performance of an in-cylinder pressure sensor with integral electronics developed for use on production engines.