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Effect on gasoline engine emission characteristics of variable composition oxygen-enriched intake air

机译:变组成比富氧进气对汽油机排放特性的影响

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In this paper, taking air-cooled, four-stroke, single cylinder gasoline engine as the research object, oxygen-enriched intake air systems and gasoline engine performance test bed was built. In the range of 21% to 26% enrichment ratio, based on MAP chart of variable component enriched intake, control parameters was adjusted according to the PWM principle, mixture gas of different oxygen and nitrogen components was prepared for the test engine. Under the conditions of different components intake air, an HC, CO and NOx emission characteristic of gasoline was comparatively analyzed through universal characteristic test. The results show that the lowest HC emissions and CO emissions under conditions of variable component of the oxygen-rich intake air were reduced by 17.59% and 17.14% compared with the normal intake, the lowest NOx emissions was 53 × 10-6, it increased 7.55%. Under conditions of variable component oxygen-rich intake air, HC and CO emissions of gasoline engine significantly reduced, NOx emissions deteriorated slightly, which improved relatively integrated emission performance of gasoline engine.
机译:本文以风冷四冲程单缸汽油机为研究对象,建立了富氧进气系统和汽油机性能试验台。在21%到26%的浓缩比范围内,根据可变成分富集进气的MAP图,根据PWM原理调整控制参数,为测试发动机准备了不同氧气和氮气成分的混合气体。通过通用特性试验,比较了进气成分不同的情况下汽油的HC,CO和NOx排放特性。结果表明,富氧进气中可变成分条件下的HC和CO排放最低,与正常进气相比分别降低了17.59%和17.14%,NOx的最低排放为53×10-6,增加了。 7.55%。在可变成分富氧进气条件下,汽油机的HC和CO排放量显着降低,NOx排放量略有下降,从而改善了汽油机的相对综合排放性能。

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