Sensor accuracy under extreme conditions


cylinder pressure sensorThe Kistler Group’s 66351A cylinder pressure sensor helps enable closed loop combustion control. Photo: Kistler Group



The Kistler Group’s new 66351A cylinder pressure sensor for large marine and stationary engines is designed for achieving measuring accuracy under extreme conditions in the combustion chamber.

Designed with the optimisation of dual-fuel engines in mind, the sensor is used to monitor all cylinders simultaneously and provide accurate data. The continuous monitoring of cylinder pressure enables closed loop combustion control, which results in increased engine performance as well as fuel savings. With the help of closed loop combustion control, fuel consumption can be reduced by approximately 2% per engine per year, amounting to an average reduction of 200t of CO2.

“Thanks to many years of experience in cylinder pressure measurement, Kistler guarantees reliable measurement data that can be used to detect problems early on and enable optimum control of the combustion process,” said Miika Jussila, head of marine & stationary engines at Kistler. “Based on this measurement data, maintenance intervals can be optimised and downtimes can be planned.”

To ensure reliable signal transmission, the 6635A1 cylinder pressure sensor utilises welded connections instead of traditional plug connectors. Thus, it is able to deal with mechanical shocks of up to 2000 g. The optimised diaphragm design minimizes the thermal shock error while enabling reliable peak pressure measurement up to 350 bar. PiezoStar crystals, which are grown specially by Kistler, are another new feature. They offer exceptional measurement stability and minimal temperature dependence in demanding environments. The sensors function reliably at temperatures of up to 350°C.

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