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Effect of Cylinder Injection Signal Override on Power Losses and Fuel Economy in Internal Combustion Engines

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The current research has evaluated the effects of cylinder injection signal override technology in internal combustion engines on cylinder liner conditions, friction forces, power losses, and fuel economy. For the development of the research, a mathematical model has been built to describe the tribological behavior between the cylinder liner and the compression ring. The results have showed that the cylinder injection signal override technology leads to a 14.3% increase in the maximum pressure in the cylinder chamber, a 9.2% increase in the cylinder liner temperature, and a 13.6% reduction in the lubrication thickness for the cylinders that remain active. Additionally, a 23.2% and 34.4% increase in power losses associated with friction force and exhaust leakage is evident. Despite the above, cylinder injection signal override allows a 16.9% decrease in engine fuel consumption, which reduces engine operating costs. In general, cylinder injection signal override technology presents a benefit for decreasing engine fuel consumption. However, it is necessary to consider the loss of power and additional wear caused by the engine components.
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Compression Ring; Engine Frictional Forces; Fuel Economy; Lubrication Film; Power Loss; Signal Override

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