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二冲程发动机得到了广泛的应用,但排放物,特别是碳氢化合物较多.在某些国家,这些碳氢化合物在国家HC总排放量中所占比例很大.减少这些排放物的试验办法和规定已由欧州的小发动机双轮摩托车各有关协会进行了讨论,本文予以概述. 文中对50cm~3发动机所有扭矩曲线族的HC、CO、NO_x和O_2的排放量及温度分布进行了系统的研究. 减少这些废气排放量的小型、低成本催化系统在固定式发动机(随发动机的各型号进行改装)和转鼓测功器(应用ECE循环时的排放量)上用商用燃油(含Pb0.15g/L)进行了试验.主要按照氧的浓度和温度确定其总平均效率.
Two-stroke engines are widely used, but emissions, especially hydrocarbons, are high, and in some countries these hydrocarbons represent a significant share of the total national HC emissions. Tests to Reduce These Emissions And regulations have been discussed by the relevant associations of European small motor scooters, this paper gives an overview of the emissions and temperature distribution of HC, CO, NO_x and O_2 for all torque curves of 50cm ~ 3 engines . Small, low cost catalytic systems that reduce these emissions are sold on commercial fuels (including Pb0 (R)) on fixed engines (retrofitted with various models of the engine) and drum dynamometers (emissions on ECE cycles) .15g / L) were tested mainly in accordance with the oxygen concentration and temperature to determine the total average efficiency.