Using a seven-step quality improvement process, some of the engine build-up factors adversely influencing the severity and precision of the Sequence VI dynamometer test were examined. Insights from engineering (theory) and database (statistical) analyses enabled a 23 factorial experiment to identify oil ring tension, piston ring side clearance, and piston fit as critical parameters in a 3-oil, 9-engine, 28-test program. High ring tension was shown to emphasize the friction reducing capability of higher performing oils and the deficiency of a lower performing oil. Interactions were noted. A helpful correlation of test severity with the engine calibration indicators was shown.
Influence of Engine Buildup Variables on the ASTM Sequence VI Fuel Efficient Oil Test
Sae Technical Papers
International Fuels & Lubricants Meeting & Exposition ; 1990
1990-10-01
Aufsatz (Konferenz)
Englisch
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