AN INVESTIGATION OF DIESEL ENGINE OIL FILTRATION AND ABRASIVE WEAR WITH HIGH DETERGENCY LUBRICANTS BY MEANS OF RADIOACTIVE TRACER TECHNIQUES
Technical Report
·
OSTI ID:4174288
A study designed to evaluate the relative effects of fullflow and bypass filtration, abrasive particle size, and detergent additive level of diesel lubricating oils on piston ring wear in a General Motors 3-71 type diesel engine was conducted using radioisotope tracer techniques. The detergent-type oils greatly reduced the amount of piston ring wear in comparison to the nonadditive oil. However, when abrasive contaminants were added to the lubricating oil system, the detergent additive oils permitted much more piston ring wear than the nonadditive oil. The detergent-type oils did not reduce the ability of either full-flow or bypass filters to remove wear debris from the oil system. Filters reduced wear rates appreciably, both with and without abrasives added to the oil. Full-flow filters were more effective than bypass filters in reducing wear when abrasives were added and just as effective as the bypass type with the higher detergent oils in the absence of abrasive. Bypass filters were the more effective ones with oils of low or no additive content when no abrasives were added. The use of radioactive chromium-faced steel piston rings and a monitoring system employing a scintillation detector and pulse height analyzers permitted rapid and quantitative determination of wear rates under various operating conditions. (auth)
- Research Organization:
- Naval Engineering Experiment Station, Annapolis
- NSA Number:
- NSA-14-011702
- OSTI ID:
- 4174288
- Report Number(s):
- NP-8426; EES-620320A; EES-8300
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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