CNG Car Engine Compression Ratio Optimization and Knock Simulation Analysis

Abstract:

We set up one cylinder of CNG engine by using GT-Power software and the compression ratio and the knock are studied. The conclusions are as follows: when the compression ratio increases, the rate of pressure rise of acute burning period increases; The maximum cylinder pressure increases; The maximum temperature decreased slightly and after burning period the temperature increases; The critical knocking compression ratio appears at the full load of 4000rpm conditions; If we only consider it knocking or not, the engine compression ratios can change from 10 to 11.

• Periodical: Applied Mechanics and Materials (Volumes 341-342)
• Pages: 360-365
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.341-342.360
• Online since: July 2013
• Authors: Yan Qin, Yu Liu, Yuan Zhi Feng, Guang Yang Liu, Guo Dong Feng
• Keywords: CNG Engine, Compression Ratio, Knock, One-Dimensional Simulation, Optimization

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