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Analysis of Lubrication Oil Supply to the Crank-Pin Bearings
Published July 18, 1995 by Society of Automotive Engineers of Japan in Japan
Aeration which occurs in a crankshaft lubricant passage heavily affects seizure of crank-pin bearings. In order to make the relation between aeration and seizure clear, we measured oil pressure and velocity of lubricant in the passage and crank-pin bearing temperature on firing engines. The test manifested that the aeration interrupts oil flow to the crank-pin bearings so much and leads to bearing seizure. Thus we developed a sophisticated oil supply simulation program based on the measurement. This reports both the measured results and outline of the simulation.