Effect of Hydrogen Addition on Idle Performance of a Spark-Ignited Gasoline Engine at Lean Conditions with a Fixed Spark Advance
Effect of Hydrogen Addition on Idle Performance of a Spark-Ignited Gasoline Engine at Lean Conditions with a Fixed Spark Advance
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DOI：
10.1021/ef900517t
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发表时间：
2009-08
期刊：
影响因子：
5.3
通讯作者：
C. Ji;Shuofeng Wang
中科院分区：
文献类型：
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作者：
C. Ji;Shuofeng Wang
火花点火式发动机在怠速和稀燃工况下总是遭受高的比油耗、排放和循环变化。在一台4缸火花点火汽油机上进行了怠速加氢扩展发动机稀燃极限、改善发动机经济性和排放性能的试验研究。该发动机经过改装，允许氢气和汽油同时注入进气道，以实现氢-汽油混合动力发动机（HHGE）。氢气和汽油的流速由混合动力电子控制单元（HECU）控制。三个氢的体积分数为0，3，和6%的进气中施加到调查的影响，氢气添加对发动机的热效率，燃烧持续时间，循环变化，和排放在怠速条件下使用固定的火花提前。在各富氢水平下，通过降低汽油流量使发动机逐渐变稀，直至达到最佳富氢系数。
Spark-ignited engines always suffer high specific fuel consumption, emissions, and cyclic variation at idle and lean conditions. An experimental investigation aiming at extending the engine lean burn limits and improving the engine economic and emissions performance with hydrogen addition at idle conditions was carried out on a 4-cylinder spark-ignited (SI) gasoline engine. The engine was modified to permit hydrogen and gasoline to be injected into the intake ports simultaneously to realize a hybrid hydrogen−gasoline engine (HHGE). The hydrogen and gasoline flow rates were governed by a hybrid electronic control unit (HECU). Three hydrogen volumetric fractions of 0, 3, and 6% in the intake were applied to investigate the effects of hydrogen addition on engine thermal efficiency, combustion duration, cyclic variation, and emissions at idle conditions using a fixed spark advance. Under each hydrogen enrichment level, the engine was gradually leaned by reducing the gasoline flow rate until the coefficient of...