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Measurement of Oil Film Pressure in the Main Bearings of an Operating Engine Using Thin-Film Sensors
ISSN: 1946-3936, e-ISSN: 1946-3944
Published April 14, 2008 by SAE International in United States
Citation: Kataoka, T., Suzuki, Y., Kato, N., Kikuchi, T. et al., "Measurement of Oil Film Pressure in the Main Bearings of an Operating Engine Using Thin-Film Sensors," SAE Int. J. Engines 1(1):352-358, 2009, https://doi.org/10.4271/2008-01-0438.
We developed a technique to measure oil film pressure distribution in engine main bearings using thin-film pressure sensors. The sensor is 7μm in thickness, and is processed on the surface of an aluminum alloy bearing. In order to increase the durability of the sensor, a layer of MoS2 and polyamide-imide was coated on thin-film sensors. This technique was applied to a 1.4L common-rail diesel engine operated at a maximum speed of 4,500r/min with a 100Nm full load, and the oil film pressure was monitored while the engine was operating. The measured pressure was compared with calculations based on hydrodynamic lubrication (HL) theory.