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Heat Release Comparison Between Optical and All-Metal HSDI Diesel Engines
Technical Paper
2008-01-1062
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Experiments are performed in optical engines in order to understand the combustion process in standard engines. In spite of this, little work has been done to verify that the results from optical engines are representative for a standard engine. The wall heat losses in optical engines are lower than in all-metal engines due to the lower heat conductivity of optical parts and a less efficient cooling system. Furthermore, optical engines often have larger crevice volumes due to a lower position of the piston rings. The present investigation studies how these differences affect the heat release and emissions in optical HSDI diesel engines. Five different engine configurations are studied: an optical engine of Bowditch design with two different squish heights, the same engine fitted with a metal piston, the same engine with all quartz parts replaced with metal components and, finally, a standard diesel engine. It is found that the use of optical parts affect the combustion process. The effects can be seen both in the heat release and in the exhaust emissions. They are explained by differences in heat conductivity between the wall materials of the engines investigated. It is shown that the differences can be compensated for by adjusting the inlet temperature.
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Authors
- Ulf Aronsson - Division of Combustion Engines Lund University
- Clement Chartier - Division of Combustion Engines Lund University
- Uwe Horn - Division of Combustion Engines Lund University
- Öivind Andersson - Division of Combustion Engines Lund University
- Bengt Johansson - Division of Combustion Engines Lund University
- Rolf Egnell - Division of Combustion Engines Lund University
Topic
Citation
Aronsson, U., Chartier, C., Horn, U., Andersson, Ö. et al., "Heat Release Comparison Between Optical and All-Metal HSDI Diesel Engines," SAE Technical Paper 2008-01-1062, 2008, https://doi.org/10.4271/2008-01-1062.Also In
Combustion and Flow Diagnostics and Fundamental Advances inThermal and Fluid Sciences, 2008
Number: SP-2178; Published: 2008-04-14
Number: SP-2178; Published: 2008-04-14
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