The influence of improved mixture quality on engine exhaust emissions and performance.
The influence of improved mixture quality on engine exhaust emissions and performance.
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DOI：
10.1080/00022470.1967.10469003
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发表时间：
1967-07
期刊：
影响因子：
--
通讯作者：
Robison Ja;Brehob Wm
中科院分区：
文献类型：
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作者：
Robison Ja;Brehob Wm
在稳态运行条件下的多缸发动机测试中，使用大型蒸汽加热燃油汽化罐作为化油器。与普通化油器相比，该油箱提供了改进的空气燃料混合物质量，即燃料完全汽化，与空气充分混合，并且温度升高。虽然不是实用的发动机硬件，但该油箱提供了一种确定改善混合物质量所带来的收益程度的方法。混合物质量的改善使富混合物碳氢化合物和一氧化碳的浓度略有降低，但并没有降低这两种废气污染物的最低排放量。最低燃料消耗同样不受混合物质量改善的影响。改善混合物质量的最重要的好处来自于改进的几何和循环燃料分布——失火稀薄极限的大幅扩展。稀薄极限运行的重要性及其与减少废气污染物的关系是显而易见的...
A large, steam-heated, fuel vaporization tank was utilized as a carburetor in multicylinder engine testing at steady-state operating conditions. In comparison to normal carburetion, the tank provided improved air-fuel mixture quality, i.e., completely vaporized fuel, thoroughly mixed with air, and at elevated temperatures. Although not a practical piece of engine hardware, the tank provided a means of determining the extent of gains to be made with improved mixture quality. Improved mixture quality produced slight reductions in rich mixture hydrocarbon and carbon monoxide concentrations but did not reduce the minimum emissions of these two exhaust contaminants. Minimum fuel consumption was similarly unaffected by improved mixture quality. The most important benefit of improved mixture quality was derived from improved geometric and cyclic fuel distribution—a substantial extension of the misfire lean limit. The significance of lean limit operation and its relationship to reduced exhaust contaminants is dis...