Accession Number:



Engine Cold Start

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Technical Report,10 Jul 2013,30 Sep 2015

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U.S. Army TARDEC Fuels and Lubricants Research Facility San Antonio United States

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These fuels were used for testing a GEP 6.5L turbo charged V-8 diesel engine operation in a cold box. This engine architecture is traditionally sensitive to cold start and was able to show large changes in operability between the fuels. At a relatively warm 40 degrees F, fuels below 44 CN were unable to start in the engine without the aid of glow plugs. At 20 degrees F and lower, none of the fuels were able to start the engine without the aid of glow plugs. At the -20 degrees F condition, the lowest cetane fuel caused cylinders 4 and 6 to cease firing, for 17 and 20 minutes respectively, until sufficient heat had built up in the engine to restart combustion. This cylinder non-fire condition was more and more prevalent with colder temperatures and lower cetane number fuels.

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