轻型车排放测试影响因素试验研究

针对某款国Ⅳ轻型汽油车进行了不同测试条件下的排放对比试验,分析了测试条件对试验结果的影响.试验结果表明,随着预置环境温度升高,车辆HC和CO排放量有所下降;随着驱动轮胎压力的降低,车辆的排放量及油耗会逐渐增高;固定链条与水平方向形成一定倾角向下固定车辆时的排放量和油耗大于水平拉紧车辆的情况;驾驶员驾驶经验和对车辆状况的熟悉程度会影响排放试验结果.提出了减小各因素对排放测试结果影响的建议.

An Experimental Study on the Effect Factors of the Light-duty Vehicle Emission Testing

Through contrast testing on the emission of national IV Light-duty vehicle under different test conditions,the impact of testing conditions on the test results are analyzed.The results indicate that,with the increase of preset ambient temperature,the HC and CO emission will decrease.With the drop of driving tire pressure,vehicle emission and fuel consumption will increase gradually.The emission and fuel consumption of vehicle when it is fixed by chain with certain angle are higher than the way which the vehicle is fixed by chain at horizontal direction.The driving style and familiarity on the vehicle of the driver can also influence the emission test results.Finally,proposals on reducing the effect of various factors on the emission test results are proposed.