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Transient Combustion Process of an IDI Diesel Engine with Dual-Throat Jet at Cold-Starting
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English
Abstract
The dual-throat jet technique has been successfully used to improve cold-starting of the swirl-type IDI diesel engines. It has been proven that, with the aid of the second throat connecting the swirl chamber and the main combustion chamber, the cold-starting process was more stable, quiete and clean. However, the understanding of the mechanism of this technique is far less than satisfied as regarding to the better control and further development.
An intensive fundamental experimental investigation of the transient process of the ignition and combustion at cold-staring had been conducted on a swirl-chamber IDI diesel engine with the help of high-speed photography. Based on the results of this investigation, the following conclusions have been approached: 1) There exist three types of heat release rate pattern at the cold-starting. Different pattern will result in different engine behavior. 2) The secondary throat has double effects on the engine starting characteristics: (a) improvement of the ignition conditions in the main chamber by directly delivering pilot fuel; (b) improvement of the fuel/air mixing process by intensifying turbulence in the swirl chamber, which depends on the geometrical shape and orientation of the throat.
Authors
Citation
Li, D., Zhu, X., He, X., and Peng, L., "Transient Combustion Process of an IDI Diesel Engine with Dual-Throat Jet at Cold-Starting," SAE Technical Paper 960029, 1996, https://doi.org/10.4271/960029.Also In
References
- Fritz Steven G. Abata Duane L. A Photographic Study of Cold Start Characteristics of a Spark Assisted Diesel Engine Operating on Broad Cut Diesel Fuels SAE Technical Paper, 871674
- Tanaka Toshiaki Improvement in IDI Diesel Engine Performance Through Dual-Throat Jet Combustion Transactions of the Society of Automotive Engineers of Japan 32 1996
- Li Detao He Xiao Yang Investigation on Unstable State Combustion in Swirl Chamber Diesel Engine under Cold-Starting Condition Transactions of CSICE
- Zhu Xiaoguang Li Detao Investigation on Ignition and Combustion at Starting in a Swirl Chamber Diesel Engine With a Starting Throat Transactions of CSICE