The shipping industry has been working hard to optimize the efficiency of large engines, as achieving every percentage point of efficiency improvement has a huge impact on reducing fuel consumption and emissions, and achieving this requires new ways and innovative products. Kistler will respond to the engine's higher cylinder pressure with its rugged, accurate measuring system.
Optimized pressure measurement saves fuel. The efficiency of large engines such as those equipped on merchant ships can be increased by means of cylinder pressure sensors that accurately monitor the combustion process. While traditional diesel engines have been widely used, the applications on gas and dual fuel engines have been on the rise.
These alternative engine types will help enhance environmental compatibility while reducing fuel consumption and CO2 emissions. However, the use of a substitute engine has other effects as well: the combustion process becomes more complicated and requires control by means of cylinder pressure measurement (Closed Loop Combustion Control - CLCC). A possible way to pinpoint the combustion process monitoring is to optimize the cylinder pressure. For example, increasing the peak pressure of 1 bar reduces fuel consumption by as much as 0.2-0.25 g / kWh.
The Model 6635A1 high-performance cylinder pressure sensor is a new sensor from Kistler, a specialist measurement technology portfolio. Even with high thermal loads and stress due to high vibration, the sensor ensures a high level of dynamic signal with good measurement accuracy.
Kistler's new piezoelectric sensor has the ideal design features that make it ideal for large combustion engines. At the heart of the new sensor is the recently developed PiezoStar crystal with superior performance: for example, it can be used in temperatures up to 350 ° C. The Model 6635A1 High Performance Cylinder Pressure Transducer also features a patented diaphragm that combines accuracy and strength. Another characteristic is the significant cylinder temperature fluctuations caused by the optimized combustion flame simulated by the finite element method coupled with subsequent testing and sensor vibration. Kistler has also patented a sleeve-type sleeve to ensure that the sensor is disconnected from the mechanical housing, thus ensuring a stable measurement signal even at higher pressures that can cause cylinder head variations. The third key design feature is the ceramic introduction of the sealed measuring cell. In addition, the use of high-sensitivity piezoelectric components.