Intelligent, Miniaturized and Long Life Cylinder Pressure Sensor with Integrated Data Acquisition of Combustion Specific for Closed Loop Control on Diesel- and Gas Engines

Authors

Stefan Neumann, Matthias Bienwald, Vili Mulla, IMES GmbH

Year

2007

Summary

This paper describes the design and performance of an intelligent, miniaturized long-life cylinder pressure sensor that has been specifically developed for monitoring of high speed diesel- and gas engines (1500 – 1800 RPM) with output >30 kW/cylinder. In a robust, durable, and low-cost design the IMES pressure sensors utilize the principle of thin film layers. Basis is a thin film cell which forms a metal substrate. Finally, the measuring cells are thermally aged at high temperature. Altogether the miniaturized intelligent pressure sensor has a dimension with thread M10 and a diameter of 13 mm. The electronic of the intelligent pressure sensor includes a new microprocessor type which allows two functions: cylinder pressure measurement and knock detection for gas engines. The knocking value and the maximum pressure value are transmitted for each cycle via CAN Bus to the automation system. For diesel engines other specific combustion parameters can be calculated. Operating data (for example motor running hours or maximum pressure value) is stored in the sensor electronic and can be read via CAN-bus.

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