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The Cold Cranking Simulator and British Engine Cranking Studies
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English
Abstract
This paper presents a summary of studies initiated by the British Technical Council to examine the repeatability and reproducibility of cold crank simulator results obtained on European cross-graded engine oils used in gasoline and diesel engines, and also to relate the results obtained to actual cranking speeds.
The study of various components of engine cranking resistance on low-temperature starting behavior confirms that only those having oil viscosity dependence are related to temperature. Results obtained on engine startability and the cranking of used lubricants show significant increases in cranking speed as a result of fuel dilution, but show the converse for high insoluble contents (up to 10%).
An advantage in cold startability is shown for the low end of the 20W specification compared to the high, but magnitude depends very much on the individual engine. Good correlation was obtained between the cold crank simulator results and the cranking tests on the gasoline engine at +10 F and diesel engine at - 10 F, using the various selected oils, including the widely used 20W/50 multigrades.
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Citation
Hollinghurst, R., Hackett, C., Marsden, K., and Wright, R., "The Cold Cranking Simulator and British Engine Cranking Studies," SAE Technical Paper 720526, 1972, https://doi.org/10.4271/720526.Also In
References
- Cox D. B. Manning R. E. Kim D. S. “The Cold Cranking Simulator Method for Determining Viscosity of Motor oils at Low Temperature.” SAE paper 680067 January 1968 Detroit
- British Technical Council for the Motor and Petroleum Industries (BTC) “Low Temperature Viscosity of Engine Lubricants, Using the Cold Crank Simulator, and Engine Cranking Studies.” Motor Industry Research Association, Nuneaton Warwickshire, England June 1970
- Kresge K. C. “Low Temperature Engine Cranking Studies.” Philadelphia Section of the SAE April 1965
- Partington B. Pike W. C. “The Effect of Lubricants on the Starting Ability of Automobile Engines,” Wear 17 5 6 May June 1971 351
- “Development of Research Technique for Determining the Low Temperature Cranking Characteristics of Engine Oils.” March 1963 January 1964
- Hollinghurst R. Singleton A. “Viscosity and Engine Performance,” J. Inst. Pet. 55 544 July 1969 193