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Cycle-by-cycle variations in a spark ignition engine fueled with natural gas–hydrogen blends combined with EGR by Bin Huang; Erjiang Hu; Zuohua Huang; Jianjun Zheng; Bing Liu; Deming Jiang is a Engineering article available to read on EtoBox.

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Study of cycle-by-cycle variations in a spark ignition engine fueled with natural gas–hydrogen blends combined with exhaust gas recirculation (EGR) was conducted. The effects of EGR ratio and hydrogen fraction on engine cycle-by-cycle variations are analyzed. The results show that the cylinder peak pressure, the maximum rate of pressure rise and the indicated mean effective pressure decrease and cycle-by-cycle variations increase with the increase of EGR ratio. Interdependency between the above parameters and their corresponding crank angles of cylinder peak pressure is decreased with the increase of EGR ratio. For a given EGR ratio, combustion stability is promoted and cycle-by-cycle variations are decreased with the increase of hydrogen fraction in the fuel blends. Non-linear relationship is presented between the indicated mean effective pressure and EGR ratio. Slight influence of EGR ratio on indicated mean effective pressure is observed at low EGR ratios while large influence of EGR ratio on indicated mean effective pressure is demonstrated at high EGR ratios. The high test engine speed has lower cycle-by-cycle variations due to the enhancement of air flow turbulence and swirls

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Author

Bin Huang; Erjiang Hu; Zuohua Huang; Jianjun Zheng; Bing Liu; Deming Jiang

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0360-3199)

Published

2009

Language

EN

Field

Engineering (Physical Sciences)