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Engine Testing at Low Temperatures
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
Annotation ability available
When evaluating fuels and engine lubricants in respect of, for example, fuel economy, high accuracy is required. In any engine testing, the best accuracy and repeatability are obtained with a test engine installed in an engine dynamometer, and not in a car on a chassis dynamometer.
At the Technical Research Centre of Finland, a special cold chamber suitable for engine and transmission component testing was built in 1985. The equipment consists of a 75 m3 cold chamber, a powerful cooling machinery, a computer-controlled engine dynamometer, a hydrostatic propulsion unit and a versatile data acquisition system.
This paper describes the structure of the system (cold chamber, cooling machinery and its control system, engine and engine dynamometer installation, instrumentation). Special problems like controlling engine operation point during warm-up, handling of fuels, lubricants and batteries, and measuring fuel consumption without disturbing the fuel system are discussed.
The equipment has been used for the determination of the fuel consumption and exhaust emissions of different engines as a function of temperature, and for evaluation of fuels, lubricants and auxiliary heaters. Test results are demonstrated by examples, and accuracy and repeatability are discussed.
CitationNylund, N., "Engine Testing at Low Temperatures," SAE Technical Paper 890010, 1989, https://doi.org/10.4271/890010.
- Kytö, Matti “Engine lubrication in cold start-up” Subzero Engineering Conditions Conference Rovaniemi January 1989
- Nylund, Nils-Olof Laurikko, Juhani Juva, Ari “Engine lubrication and fuel economy at low ambient temperatures” XXII Fisita Congress Dearborn, Michigan 1988 SAE Paper 885020
- Laurikko, Juhani Nylund, Nils-Olof Sipilä, Kai “Automotive exhaust emissions at low ambient temperature” Technical Research Centre of Finland Espoo 1987 38
- Laurikko, Juhani “Automotive exhaust emissions at low ambient temperature” Subzero Engineering Conditions Conference Rovaniemi January 1989