Experimental Research of HCCI Combustion Based on Late Exhaust Duct EGR Strategy

Abstract:

Late exhaust duct EGR strategy is one of internal EGR strategies to realize HCCI combustion. Based on a single-cylinder test engine system equipped with an electronic controlled hydraulic variable valve train system, the effects of valve phases in this strategy were studied. The results show that at engine speed 1000r/min, equivalent air-fuel ratio λ= 1, when the IVO phase is put off, EGR ratio increases gradually, CA10 and CA50 are postponed and combustion duration becomes longer. At the same time, peak pressure and maximum pressure rise rate have a tendency to descend. When the SEVO phase is postponed, the parameters of the test engine will also be affected. However, when the phase is postponed above the critical point, the parameters have a backward trend. The property of HCCI combustion is not sensitive to SEVO phase.

• Periodical: Applied Mechanics and Materials (Volumes 713-715)
• Pages: 327-330
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.713-715.327
• Online since: January 2015
• Authors: Yin Han Gao*, Yu Chao Jiang, Peng Cheng, Jun Cheng Chi, You Kun Wang
• Keywords: Combustion Parameters, HCCI, Late Exhaust Duct Strategy, Variable Valve

References

[1] Fengjun Gao, Yingnan Guo: Small Internal Combustion Engine and Motorcycle, Vol. 39(2010)No. 5, p.6.

[2] Fafa Liu, Kaiyou Wang: Transactions of CSICE, Vol. 29(2011)No. 4, p.289.

[3] Weifei Yu, Hui Xie: Journal of Combustion Science and Technology, Vol. 18(2012)No. 3, p.265.

[4] Hui Xie, Hua Zhao: Transactions of CSICE, Vol. 24(2006)No. 1, p.22.

[5] Fan Xu, Zhi Wang: Chinese Internal Combustion Engine Engineering, Vol. 31(2010). No. 4, p.6.