Abstract
Testing ways and means are introduced to measure oil film thickness of a main bearing in multi-cylinder IC engines with two eddy current sensors. A 4100QB diesel engine is taken as a model to detect the influences of loads and journal speeds on oil film thickness of a main bearing. It can be inferred from the test that the Minimum Oil Film Thickness (MOFT) constantly decreases with the increase of the loads while the journal speed keeps stable, and MOFT constantly increases corresponding to the increase of the journal speeds while loads on the bearing are unchanged.
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