| 汽油机怠速工况下HC和CO排放机理的实验研究 |
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| 引用本文： | 张惠明 高崇岭. 汽油机怠速工况下HC和CO排放机理的实验研究[J]. 燃烧科学与技术, 1997, 3(3): 280-285 |
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| 作者姓名： | 张惠明 高崇岭 |
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| 作者单位： | 天津大学，天津内燃机厂 |
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| 摘 要： | 本文系统地研究了汽油机怠速工况下排气中ＨＣ和ＣＯ生成的基本规律，重点探讨了燃烧过程与ＨＣ、ＣＯ排放的内在关系。燃烧过程所考虑的因素主要有燃烧完善程度（用累积放热百分比表示），燃烧速率和着火时刻。试验发现燃烧速率对排放的影响较小。在空燃比较高（大于１３）的情况下，采用适当的废气再循环可显著降低排气中ＨＣ的生成量，这为改善现代汽油机怠速工况下的排放水平提供了有效的途径。
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| 关 键 词： | 汽油机，怠速工况，排放机理 |
Experimental Study on the Mechanisms of HC and CO Emissions under Idling Speed in Gasoline Engines |
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| Zhang Huiming Liu Wensheng Zhao Hui Zhao Kuihan Li Wang. Experimental Study on the Mechanisms of HC and CO Emissions under Idling Speed in Gasoline Engines[J]. Journal of Combustion Science and Technology, 1997, 3(3): 280-285 |
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| Authors: | Zhang Huiming Liu Wensheng Zhao Hui Zhao Kuihan Li Wang |
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| Affiliation: | Zhang Huiming Liu Wensheng Zhao Hui Zhao Kuihan Li Wang(Tianjin University) Gao Chongling Liu Dingran(Tianjin Internal Combustion Engine Works) |
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| Abstract: | The essential mechanisms of HC and CO emissions under idling speed in gasoline engines are systematically studied through experiments conducted on a three cylinder gasoline engine. the mutual links between combustion process (including extent of combustion, burning rate and flame initiation time) and HC and CO emissions are analyzed, especially. It is found that the influence of burning rate on the emissions is small. Under the conditions of high air/fuel ratio (higher than 13) proper EGR (Exhaust Gas Recirculation) can reduce HC emissions dramatically, which suggests a good method to improve the emissions level under idling speed in modern gasoline engines. |
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| Keywords: | Gasoline engines Idling speed Emissions mechanisms |
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