Influences of Diesel Fuel Properties and Ambient Temperature on Engine Operation and Exhaust Emissions 890012
Different qualities of diesel fuels have been tested in naturally aspirated IDI engines and turbocharged DI engines to determine the effect on exhaust emissions (NOx, CO, HC, PAH, particulates, sulfates and smoke) and combustion characteristics (heat release, ignition delay) under cold ambient conditions.
Measurements were made during engine warm-up and under steady state operating conditions at ambient temperatures between -20°C and +20°C. The startability was tested down to -30°C.
The results showed that the behaviour of the diesel engine is dependent on engine design, the lubricant used and the fuel properties. Low viscosity and good flow properties of the fuel are important for starting - more important than cetane number, for example. Fuel consumption and exhaust emissions at the beginning of the warm-up period increased considerably as the starting temperature was reduced.
Any change in the fuel quality or fuel temperature influenced the dynamic injection timing and consequently effected the exhaust emissions, in particular NOx.
Citation: Juva, A., Zelenka, P., and Tritthart, P., "Influences of Diesel Fuel Properties and Ambient Temperature on Engine Operation and Exhaust Emissions," SAE Technical Paper 890012, 1989, https://doi.org/10.4271/890012. Download Citation
Ari Juva, Paul Zelenka, Peter Tritthart
AVL — List GmbH, Graz, Austria
1989 Subzero Engineering Conditions Conference and Exposition
Subzero Engineering Conditions Conference Proceedings-P-220, SAE Transactions Journal of Fuels and Lubricants-V98-4