This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Sequence IID Crankcase Pressure - Investigation of Condenser Plugging by Emulsion Formation
Annotation ability available
Sector:
Language:
English
Abstract
The Sequence IID engine test procedure, traditionally used to evaluate the anti-rust performance of lubricants, has also been used to measure emulsion forming tendencies of lubricants. In the IID engine, emulsion collects at the base of the crankcase ventilation breather tube condenser which causes partial plugging and an increase in crankcase pressure. The purpose of this paper is to describe the chemical nature of the emulsion and to elucidate physical factors which have been found to influence emulsion buildup on the lower face of the Sequence IID condenser. The process of emulsion formation was observed in real time using a fiber optic video camera which aided in understanding the influences of condenser face roughness and lubricant chemistry on crankcase pressure. The effect of substituting unleaded fuel for standard Sequence l!D leaded fuel was also determined. Finally, an abbreviated version of the Sequence IID procedure was used in conjunction with proprietary bench-scale tests to suggest formulation solutions that prevent excessive crankcase pressure buildup in the Sequence IID engine.
Recommended Content
Authors
- M. F. Salomon - The Lubrizol Corp. Wickliffe, OH
- M. Galic - The Lubrizol Corp. Wickliffe, OH
- R. N. Jones - The Lubrizol Corp. Wickliffe, OH
- R. W. Dix - The Lubrizol Corp. Wickliffe, OH
- J. V. Stoffa - The Lubrizol Corp. Wickliffe, OH
- B. D. Domonkos - The Lubrizol Corp. Wickliffe, OH
- M. J. Covitch - The Lubrizol Corp. Wickliffe, OH
Citation
Salomon, M., Galic, M., Jones, R., Dix, R. et al., "Sequence IID Crankcase Pressure - Investigation of Condenser Plugging by Emulsion Formation," SAE Technical Paper 892109, 1989, https://doi.org/10.4271/892109.Also In
References
- “Multicylinder Test Sequences for Evaluating Automotive Engine Oils, Part 1: Sequence IID,” ASTM Special Technical Publication 315H (Part 1) September 15 1979
- ASTM Committee D2 Sequence ll/lll Information Letter No. 37 May 15 1984
- ASTM Committee D2 Sequence ll/lll Information Letter No. 49 February 12 1987
- Cordera F. J. Fuster H. J. Henderson B. M. Woodruff R. L. “TEL Scavengers in Fuel Affect Engine Performance and Durability,” SAE Tech. Paper No. 877A 1964 Fuchs E. J. “Unleaded vs. Leaded Fuel in Laboratory Engine Tests,” SAE Tech. Paper No. 710676 1971
- Covitch M. J. Gundic D. T. Graf R. T. “Microstructure of Carbonaceous Diesel Engine Piston Deposits,” Lubrication Eng. 44 2 128 1988