Effects of hydrogen addition on engine performance in a spark ignition engine with a high compression ratio under lean burn conditions |
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| Affiliation: | 1. Graduate School of Sungkyunkwan University, 300, Chunchun-dong, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Republic of Korea;2. School of Mechanical Engineering, Sungkyunkwan University, 300, Chunchun-dong, Jangan-gu, Suwon-si, Gyeonggi-do 440-746, Republic of Korea;1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;2. College of Automotive Engineering, Jilin University, Changchun 130022, China;1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130025, China;2. Department of Mechanical Engineering Technology, Purdue University, West Lafayette, IN, 47907, USA |
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| Abstract: | In this study, the effects of hydrogen addition on the engine performance were investigated using spark ignition engine fueled gasoline with a compression ratio of 15 at an air excess ratio (λ) of 1.8 and above. At λ = 1.8, the indicated thermal efficiency at the spark timing of the knock limit reached the maximum level under the conditions in which the hydrogen fraction was set to 4% of the heating value of the total fuel. Based on a heat balance analysis, the best hydrogen fraction was found as a balance between the improvement in the burning efficiency and the increase in heat loss. The lean limit was extended when the hydrogen fraction was increased from λ = 1.80 to λ = 2.28. The hydrogen addition achieved the maximum indicated thermal efficiency at spark timing of the knock limit was obtained at λ = 2.04, where the hydrogen fraction was 10%. |
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| Keywords: | Hydrogen Gasoline Lean combustion Knock SI engine |
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