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首页> 外文会议>2000 Global Powertrain Congress on Advanced Propulsion amp; Emission Technology, Jun 6-8, 2000, Detroit, Michigan USA >Hydrogen Supplemented E85 for Cold Start Improvement
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Hydrogen Supplemented E85 for Cold Start Improvement

机译：氢气补充的E85可改善冷启动

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摘要

Cold start is a definite problem in alcohol fuels making it almost impossible to start below 10℃. Operating with E85, despite addition of 15% gasoline to get more fuel vapor for combustion, at lower temperatures, does not solve the cold starting problem. Starting the engine using a very rich mixture helps due to the increased gasoline vapor available, but it also causes the emissions to be very high. Higher ignition energy helps to initiate combustion, reducing the required over-fuel-ing, but does not eliminate it. All of these problems can be eliminated by using hydrogen supplemented E85 during cold starts. Not only the cranking time decreases, but the emissions are also likely to decrease with use of hydrogen since over-fueling can be minimized. Increasing the amount of hydrogen injection decreases crank time up to about 12% hydrogen by volume. Additional hydrogen does not provide any noticeable improvement. The minimum level of hydrogen required appears to be around 8%. This level of injection ensures that the hydrogen will not fall below the minimum flammability limit of 4 % for a substantial amount of time during engine startup.
机译：冷启动是酒精燃料中必不可少的问题，几乎不可能在10℃以下启动。尽管添加了15％的汽油以获取更多的燃油蒸气进行燃烧（在较低的温度下），但仍使用E85仍无法解决冷启动问题。由于可用的汽油蒸气增加，因此使用非常浓的混合物启动发动机会有所帮助，但这也会导致排放量很高。较高的点火能量有助于燃烧，减少了所需的过燃料，但并不能消除。通过在冷启动期间使用氢气补充的E85可以消除所有这些问题。由于使用过氢可以最大限度地减少加油，因此不仅起动时间减少了，而且由于使用氢气，排放也可能减少了。氢注入量的增加将起动时间减少至约12％（体积）氢。额外的氢不会提供任何明显的改善。所需的最低氢气水平约为8％。此喷射水平可确保在发动机启动过程中，氢气在相当长的时间内不会降至低于最低可燃极限4％。

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