Effects of Engine Operating Parameters on Lean Combustion Limit of Hydrogen Enhanced Natural Gas Engine

Abstract:

An experimental study was conducted on a S.I. engine fueled by compressed natural gas and hydrogen blends (HCNG), in order to test different engine operating parameters that affect lean combustion limit (L.C.L) of HCNG engine. Firstly, constant ignition timing and ignition timing under maximum L.C.L (L.L.T) conditions were compared, then L.L.T conditions were adopted in this paper. The results indicated that for each condition, neither over-retarded nor over-advanced ignition timing are advised in order to achieve leaner combustion. L.C.L increases with hydrogen fraction in the blends, and slightly increases with throttle opening, while decreases when the engine speed is raised

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 6116-6121
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.6116
• Online since: November 2011
• Authors: Xin Wang, Hong Guang Zhang, Yan Lei, Xiao Lei Bai, Xiao Na Sun, Dao Jing Wang, Bao Feng Yao
• Keywords: Hydrogen, Lean Combustion Limit, Natural Gas

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