Experimental and Study of an Direct-Injection, Single Fuel CNG Engine

Abstract:

In this paper, a single fuel in-cylinder, direct injection compressed natural gas (CNG) engine was presented, which was modified form a 175F gasoline engine, with the 80C196KC single chip microprocessor as the controller. The structure and function of the CNG engine control system, the drive circuits of the injection system, matching its parameters and establishing the control algorithms are introduced. An oxygen sensor was used to adjust the mixture ratio to restore the engine power and reduced the exhaust emission; peak-holding drive circuit of injector was applied to improve its responsibility and spare more electrical energy; high energy ignition system was designed to produce and distribute high enough energy. The result of experimental shows that the power of CNG engine is no lower than 95% of the power of gasoline engien in the most conditions. The exhaust emissions of HC and CO are obviously reduced, compared with the gasoline engine.

• Periodical: Advanced Materials Research (Volumes 225-226)
• Pages: 207-211
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.225-226.207
• Online since: April 2011
• Authors: Hui Guo, Zhen Dong Zhang, Cong Bo Yin, Yue Dong Sun
• Keywords: Compressed Natural Gas, Direct Injection, Exhaust Emission, Fuel Economy

References

[1] Sun Ji-mei. Natural gas and Liquefied Petroleum Gas Vehicle. Beijing Institute of Technology Press，(1999).

[2] Yuji Yamamoto. Study of Combustion Characteristics of Compressed Natural Gas as Automotive Fuel. SAE Paper 940761, (1994).

[3] Deanna E. Wang, Harry C. and Watson. Direct Injection Compressed Natural Gas Combustion and Visualization. SAE Paper 2000-01-1838, (2000).

DOI: 10.4271/2000-01-1838

[4] A.E. Catania, D. Misul, and E. Spessa. Conversion of a Multivalve Gasoline Engine to Run on CNG. SAE Paper 2000-01-0673, (2000).

DOI: 10.4271/2000-01-0673

[5] Huang Zuo-Hua, Zeng Ke, and Yang Zhong-Le. Characteristics of natural gas direct injection combustion under various fuel injection timing. Ranshao Kexue Yu Jishu. 2003, VOL(9): P40-48.

[6] Wang, Da-xing; Zhang Xin, and Yang Wankun. Electronic controlled high-energy direct ignition system for turbocharged CNG engine. Chinese Journal of Mechanical Engineering (English Edition). 2004, VOL (17): P 48-51.

DOI: 10.3901/cjme.2004.supp.048

[7] Reynolds CCO, Evans RL, and Andreassi L. The effect of varying the injected charge stoichiometry in a partially stratified charge natural gas engine. SAE Paper 2005-01-0247, (2005).

DOI: 10.4271/2005-01-0247

[8] Marco Chiodi, Hans-Jürgen Berner, and Michael Bargende. Investigation on different Injection Strategies in a Direct-Injected Turbocharged CNG-Engine. SAE Paper 2006-01-3000 , (2006).

DOI: 10.4271/2006-01-3000

[9] Doo Sung Baik, Jong-Sun Lee, and Yong-Seok Cho. Combustion and Emission Characteristics of CNG Fuel inside CVC Chamber. SAE Paper 2008-01-0322, 2008.

DOI: 10.4271/2008-01-0322

[10] Jan Czerwinski, Norbert Heeb, and Yan Zimmerli. Unregulated Emissions with TWC, Gasoline & CNG. SAE Paper 2010-01-1286 , (2010).

DOI: 10.4271/2010-01-1286