Experimental Investigation into the Influence of Compression Ratio on Operating Characteristics of Single Cylinder CNG Engine with Port Injection

Abstract:

This paper indicates the early experimental results of a Ricardo model CNG engine R&D activity in Vietnam, the experiments were mainly focused on the effects of compression ratio on operating parameters of the tested single cylinder CNG engine particularly designed and fabricated for varying compression ratio purpose. The compression ratio was set in the range of ε = 10 to 15 with the change step of Δε = 1. For each compression ratio, the engine speed were varried from 1000rpm to 2200rpm with the change step of Δn = 200. The early spark angle was also changed to find out the maximum break torque. The limitation of compression ratio and engine speed at each operating point was determined by vibration signal and abnormal sound. The experimental results indicated the early spark angle must be adjusted premature in case of compression ratio and/or engine speed enhenced. Especially, the portion of indispensable power to perform the compression stroke is smaller in comparison with the portion to execute the both strokes of intake and exhaust. In addition, the shape of combustion chamber affected strongly the operating characteristics also found in this study.

• Periodical: Applied Mechanics and Materials (Volume 889)
• Pages: 396-402
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.889.396
• Online since: March 2019
• Authors: Tran Dang Quoc*, Tran Thanh Tam, Le Anh Tuan
• Keywords: CNG Engine, Compression Ratio, Operating Characteristic, Port Injection, Power Loss, Single Cylinder

References

[1] Xiuli Wang and Michael Economides, The book Advanced Natural Gas Engineering, Copyright 2009 by Gulf Publishing Company, Houston, Texas.

[2] M.U. Aslam. et.al. An experimental investigation of CNG as an alternative fuel for a retrofitted gasoline vehicle,. Science Direct, Fuel 85 (2006), pp: 717-724.

DOI: 10.1016/j.fuel.2005.09.004

[3] Tran Thanh Tam, Tran Dang Quoc, Le Anh Tuan, A technical review of CNG application as an alternative fuel for diesel engine,, Proceeding of the National Science and technology Conference on Mechanical – Transportation Engineering (NSCMET 2016), Hanoi, October 13, 2016. pp: 91-96.

[4] N. Ravi Kumar, Y. M. C. Sekhar and S. Adinarayana Effects of compression ratio and EGR on performance combustion and emissions of Di injection diesel engine,, International Journal of Applied Science and Engineering, 2013.11, pp: 41-49.

[5] Bui Xuan Trưong, Tran Dang Quoc, Khong Vu Quang, Tran Thi Thu Huong, Tran Thanh Tam, Đoan Thi Le Nhung, Performance analysis of compressed natural gas spark ignition engine with the aid of modeling AVL Boost software,, Journal of Science & Technology, ISN 1859-3585, Hanoi University of Industry, April, 2015, Number 27, pp: 73-76.

DOI: 10.18173/2354-1059.2021-0052

[6] Haeng Muk Cho, Spark ignition natural gas engines -A review,. Science Direct, Energy Conversion and Management 48 (2007) pp: 608–618.

DOI: 10.1016/j.enconman.2006.05.023

[7] Tran Dang Quoc, Khong Vu Quang, Nguyen Duc Khanh, Nguyen Tuan Nghia, Nguyen Thanh Vinh, Nguyen Phi Truong, Vu Thi Phuong, A study on effect of compression ratio in port injection single cylinder engine using CNG fuel,, Journal of Science & Technology, ISN 1859-3585, Hanoi University of Industry, April, 2016, Number 33, pp: 74-78.

DOI: 10.47800/pvj.2021.02-01

[8] Nguyen Phi Truong, Le Van Anh, Tran Dang Quoc, An examination of varying compression ratio in parameter of diesel single cylinder to gasoline and/or CNG conversion,, Journal of Science & Technology, ISN 1859-3585, Hanoi University of Industry, August, 2017, Number 37, pp: 60-64.