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High Efficiency Diesel Fuel Filtration - A Case Study
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English
Abstract
Fuel injector wear and the resulting alterations of the spray pattern, injection timing, leakage rate and fuel quantity delivered are known to cause excessive smoke in the engine exhaust. A field test was conducted at a major transit property, utilizing 3μm rated (β3 ≥ 200) secondary fuel filters to ascertain if these high efficiency filters effectively remove and retain fine particulate contaminants that would otherwise wear critical surfaces in an injector. The test was conducted on six buses, two of these buses had engines fitted with new rebuilt injectors. During the test, the median particle count of fuel sampled downstream of the high efficiency filters was over 30 times lower than that of the fuel supply (for 2μm and larger size particles). Nearly all the smoke opacity results were lower than the target value of 20%. The new rebuilt injectors were removed after 19 weeks of service and evaluated by the manufacturer for wear. Microscopic examination of critical wear areas of the plunger and bushing assembly and the valve seat on all four injectors examined indicated no discernable wear. Five of the six test filters were in service a year after their installation.
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Authors
Citation
Farooq, K., "High Efficiency Diesel Fuel Filtration - A Case Study," SAE Technical Paper 952554, 1995, https://doi.org/10.4271/952554.Also In
References
- Diesel Fuel Injection 1st Robert Bosch GmbH Stuttgard, Germany 1994
- “CRC Handbook of Lubrication and Tribology” III Booser E. CRC Press 1994
- “Hydraulic Fluid Power - Filters - Multi-pass method for evaluating filtration performance” 1981
- “Hydraulic Fluid Power-Calibration of automaticcount instruments for particles suspended in liquids-Method using Air Cleaner Fine Test Dust contaminant” 1977
- SAE J35 “Diesel Smoke Measurement Procedure” 1993 SAE Handbook 3 Society of Automotive Engineers Warrendale, PA