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Abstract

A comparison of the dynamic performance characteristics of two misaligned crankshaft bearings belonging to a four-stroke petrol engine is carried out in this paper. The misalignment considered varies in magnitude during the running cycle. Under the dynamic conditions, the performance characteristics such as minimum ®lm thickness, shaft centre orbit, friction torque and owrate are obtained by using the mobility method of Booker. The main results obtained show that the presence of even a small skew of the main journal axis can cause metal-to-metal contact at one of the bearing edges.

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