Study on the Effect of Fuzzy PID Air-Fuel Ratio Closed Loop Control of a Natural Gas Engine

Abstract:

The air-fuel ratio (AFR) control becomes an important research direction in gas engine. This article conducts air-fuel ratio (AFR) closed loop control research in a CNG engine. The injection pulse width of gas is controlled by a controller, oxygen sensor signal as a feedback signal. In order to make the engine can achieve the anticipated air-fuel ratio under different conditions; we adopt fuzzy self-tuning PID control strategy based on feed forward control. We transformed a 2135G diesel engine into the single fuel gas engine. Experimental investigation on the effect of air-fuel ratio closed loop control .Experimental results shows that, fuzzy self-tuning PID control strategy can control CNG engine air-fuel ratio working in the good condition.

• Periodical: Applied Mechanics and Materials (Volume 577)
• Pages: 372-377
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.577.372
• Online since: July 2014
• Authors: Yue Li*, En Zhe Song, Zhan Hu Zhang, Guo Feng Zhao, Shuai Huang
• Keywords: Air Fuel Ratio, Closed Loop Control, Fuzzy PID, Gas Engine, Oxygen Sensor

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