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首页> 外文会议>SAE World Congress and Exhibition >Intermediate Alcohol-Gasoline Blends, Fuels for Enabling Increased Engine Efficiency and Powertrain Possibilities
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Intermediate Alcohol-Gasoline Blends, Fuels for Enabling Increased Engine Efficiency and Powertrain Possibilities

机译：中间醇 - 汽油混合，燃料可提高发动机效率和动力总成可能性

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The present study experimentally investigates spark-ignited combustion with 87 AKI E0 gasoline in its neat form and in mid-level alcohol-gasoline blends with 24% vol./vol. iso-butanol-gasoline (IB24) and 30% vol./vol. ethanol-gasoline (E30). A single-cylinder research engine is used with a low and high compression ratio of 9.2:1 and 11.85:1 respectively. The engine is equipped with hydraulically actuated valves, laboratory intake air, and is capable of external exhaust gas recirculation (EGR). All fuels are operated to full-load conditions with λ=1, using both 0% and 15% external cooled EGR. The results demonstrate that higher octane number bio-fuels better utilize higher compression ratios with high stoichiometric torque capability. Specifically, the unique properties of ethanol enabled a doubling of the stoichiometric torque capability with the 11.85:1 compression ratio using E30 as compared to 87 AKI, up to 20 bar IMEPg at λ=1 (with 15% EGR, 18.5 bar with 0% EGR). EGR was shown to provide thermodynamic advantages with all fuels. The results demonstrate that E30 may further the downsizing and down-speeding of engines by achieving increased low speed torque, even with high compression ratios. The results suggest that at mid-level alcohol-gasoline blends, engine and vehicle optimization can offset the reduced fuel energy content of alcohol-gasoline blends, and likely reduce vehicle fuel consumption and tailpipe CO_2 emissions.
机译：本研究通过其整齐的形式和中间水平的醇 - 汽油共混物实验研究了与87AKI E0汽油的火花点火燃烧。异丁醇 - 汽油（IB24）和30％Vol./vol。乙醇 - 汽油（E30）。单缸研究发动机分别具有9.2：1和11.85：1的低压和高压缩比。该发动机配备有液压致动阀，实验室进气，并且能够外部排气再循环（EGR）。使用0％和15％外部冷却EGR，所有燃料都与λ= 1一起运行到满载条件。结果表明，更高的辛烷值生物燃料更好地利用具有高化学计量扭矩能力的更高的压缩比。具体地，乙醇的独特性能使得使用E30的11.85：1压缩比加倍化学计量扭矩能力，与87AKI相比，在λ= 1的λ= 1上最多20巴（15％EGR，18.5巴为0％） EGR）。 EGR显示为所有燃料提供热力学优势。结果表明，即使具有高压缩比率，E30也可以通过实现增加的低速扭矩来进一步缩小发动机的缩小和下速度。结果表明，在中层酒精 - 汽油共混物，发动机和车辆优化可以抵消酒精 - 汽油共混物的降低的燃料能量含量，并且可能降低车辆燃料消耗和尾管CO_2排放。

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