1994-03-01

Development of a Valve Train Wear Test Procedure for Gasoline Engine Oil 940794

An analysis was made of wear factors by investigating the effect of engine operating conditions on valve train wear. It was found that cam nose wear increased as larger amounts of combustion products, including nitrogen oxides and unburned gasoline, became intermixed with the engine oil. Based on these results, a valve train wear test procedure has been developed for evaluating cam nose and rocker arm wear under engine firing conditions.
It has been confirmed that this test procedure correlates will with ASTM Sequence VE test and CCMC TU-3 test.

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