不同排放法规阶段轻型汽油车排放控制技术特征

The Features of Emissions Control Technology of Light-duty Gasoline Vehicles in Different Regulation Stages

通过分析轻型汽油车辆排放测试数据,研究了从国Ⅰ、国Ⅱ、国Ⅲ等3个排放法规阶段的排放控制技术特点。结果表明,我国车辆排放控制水平起点高,实际认证车型排放量大大低于同期排放法规限值,同等级车型之间水平接近;最新车型排放控制技术整体接近国Ⅳ水平,为全国执行国Ⅳ法规奠定了基础。国Ⅱ车型与国Ⅲ车型劣化系数均大于法规推荐值1.2;国Ⅱ轻型客车的排放水平不够稳定,应加强对在用轻型客车排放的监管。自主品牌车型的排放略差于引进车型,应尽快提高我国排放控制技术的自主研发能力,以应对更严格的排放法规要求。

By analyzing the emission data of light-duty technology at State- Ⅰ , State-Ⅱ and State-Ⅲ three emission regula gasoline vehicles, the features of emission control tion stages are studied. The results show that the vehicle emission control level in China has a high starting point, the emissions of type approval vehicles are much lower than emissions regulation limits in the same stage, the emissions level of the same grade vehicles are close to each other; the emissions control technology of the latest vehicle model is close to the level of Stage-Ⅳ, laying a foundation for the enforcement of State-Ⅳ regulation nationwide. The deterioration factors of both State Ⅱ and State Ⅲ vehicle models all exceed the regulation recommended value 1.2, and the emissions level of light-duty passenger carrying vehicles with State-Ⅱ is not so stable, thus the emission supervision on that type of vehicles should be strengthened. In addition, the emission of autonomous developed vehicle models is inferior compared with that of imported models, so the autonomous development capability in emission control technology should be enhanced as soon as possible for facing the more stringent emission regulation requirements.