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- W2267507688 abstract "Increasing on gaseous fuels as clean, economical and abundant fuels encourages the search for optimum conditions of gas-fueled internal combustion engines. This paper presents the experimental results on the lean operational limits of Recardo E6 engine using gasoline, LPG, NG and hydrogen as fuels. The first appearance of almost motoring cycle was used to define the engine lean limit after the fuel flow was reduced gradually. The effects of compression ratio, engine speed and spark timing on the engine operational limits are presented and discussed in detailed. Increasing compression ratio (CR) extend the lean limits, this appears obviously with hydrogen, which has a wide range of equivalence ratios, while for hydrocarbon fuel octane number affect gasoline, so it can' t work above CR=9:1, and for LPG it reaches CR=12:1, NG reaches CR=15:1 at lean limit operation. Movement from low speeds to medium speeds extended lean misfire limits, while moving from medium to high speeds contracted the lean misfiring limits. NOx, CO and UBHC concentrations increased with CR increase for all fuels, while CO 2 concentrations reduced with this increment. NOx concentration increased for medium speeds and reduced for high speeds, but the resulted concentrations were inconcedrable for these lean limits. CO and CO 2 increased with engine speed increase, while UBHC reduced with this increment. The hydrogen engine runs with zero CO, CO 2 and UNHC concentrations, and altra low levels of NOx concentrations at studied lean misfire limits" @default.
- W2267507688 created "2016-06-24" @default.
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- W2267507688 date "2012-04-22" @default.
- W2267507688 modified "2023-09-25" @default.
- W2267507688 title "Characterization of Lean Misfire Limits of Mixture Alternative Gaseous Fuels Used for Spark Ignition Engines" @default.
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- W2267507688 doi "https://doi.org/10.25130/10.25130/tjes.v19i1.8" @default.
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