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Development of a Rapid Compression-Expansion Machine to Simulate Combustion in Diesel Engines
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English
Abstract
A rapid compression-expansion machine which can simulate the combustion processes in diesel engines is developed. The configuration of the combustion chamber is a 100 mm bore and a 90 mm stroke, and the compression ratio is 15. The piston is driven by an electro-hydraulic system with a thrust of 90 kN and the maximum frequency of 20 Hz. The whole system composed of a hydraulic actuator, a fuel injection system, and a valve driving unit is sequentially controlled by a computer. The reproducibility of the stop position of the piston at the end of compression is achieved with an accuracy of ±0.1 mm by employing a hydraulic-mechanical brake mechanism. The experiment shows that the combustion in the expansion stroke is achieved, and that the combustion characteristics such as the rate of heat release and indicated output as well as the exhaust emission can be measured.
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Kamimoto, T., Kando, H., Kobori, S., Hatano, H. et al., "Development of a Rapid Compression-Expansion Machine to Simulate Combustion in Diesel Engines," SAE Technical Paper 881640, 1988, https://doi.org/10.4271/881640.Also In
References
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- Hayashi T. Taki M. Kojima S. Kondo T. “Photographic Observation of Knock with a Rapid Compression and Expansion Machine.” SAE Paper 841336 1984
- Kamimoto T. Yokota H. Kobayashi H. “Effect of High Pressure Injection on the Formation Processes in a Rapid Compression Machine to Simulate Diesel Flames.” SAE Paper 871610 1987
- Matsui Y. Kamimoto T. Matsuoka S. “A Study on the Time and Space Resolved Measurement of Flame Temperature and Soot Concentration in a D.I. Diesel Engine by the Two-Color Method.” SAE Paper 790491 1979