The impact of varying spark timing at different octane numbers on the performance and emission characteristics in a gasoline engine
The impact of varying spark timing at different octane numbers on the performance and emission characteristics in a gasoline engine
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DOI：
10.1016/j.fuel.2012.03.013
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发表时间：
2012-07
期刊：
影响因子：
7.4
通讯作者：
C. Sayın
中科院分区：
文献类型：
--
作者：
C. Sayın
本文介绍了不同辛烷值汽油（91、93、95、97和98）在不同点火时（ST）下的性能和排放情况。在这项工作中，使用了一个单缸，四冲程，自然吸气火花点火发动机，需要95 RON汽油燃料。发动机原（ORG） ST为23°CA下止点。通过机械地改变凸轮位置，对三种不同的STs（20°CA BTDC， 23°CA BTDC和26°CA BTDC）进行了测试。结果表明，使用高于发动机要求的转速不仅降低了发动机的制动热效率（BTE），而且增加了制动比油耗（BSFC）、制动点一氧化碳（CO）和碳氢化合物（HC）的排放，另一方面，随着温度（26°CA BTDC）的增加；BSFC， HC和CO的排放量减少，BTE提高了更高的RON。
The performance and emissions of gasoline engine using different research octane number (RON) gasolines (91, 93, 95 97, and 98 RON) at varying spark timing (ST) has been presented in this paper. For this work, a single cylinder, four stroke, naturally aspirated spark ignition engine requiring gasoline fuel with 95 RON was used. The original (ORG) ST of the engine is 23 °CA BTDC. The tests were conducted for three different STs (20 °CA BTDC, 23 °CA BTDC, and 26 °CA BTDC) by varying cam positions mechanically. Results showed that using RONs higher than the requirement of an engine not only decreased brake thermal efficiency (BTE) but also increased brake specific fuel consumption (BSFC), the emissions of carbon monoxide (CO) and hydrocarbon (HC) at ORG ST. On the other hand, with the increased ST (26 °CA BTDC); BSFC, the emissions of HC and CO decreased, and BTE boosted for higher RON.