| 英文摘要 |
Mobile source pollution is one of the major reasons for the deterioration of air quality in the metropolitan area and the key point which the environmental-protection and traffic authorities focus on. Besides, emitting the black smoke from diesel vehicles is most series problem blamed by citizens. In order to improve the emission by diesel vehicles, the Environmental Protection Administration (EPA) has implemented not only, irregular inspections, but also enhance the control measures for diesel vehicles. For example, assist Tier-1 to Tier-3 heavy-duty diesel vehicles (HDDVs) to be replaced for new ones, install air pollution control equipment or repair fuel injection system, and it has formulated annual targets for achievement. From 2017 to October 2022, EPA has assisted as many as 79,373 Tier-1 to Tier-3 HDDVs to improve pollution, the subsidy measures for large diesel vehicles have reduced TSP by approximate 4,625 metric tons (including PM10 4,097 tons and PM2.5 3,631 tons), and NOx approximate 59,872 metric tons.
Until October 2022, there are 9,399 Tier-1 to Tier-3 HDDVs have been eliminated. Among the applications for subsidies, include purchasing new or used vehicles, eliminating Tier-1 to Tier-3 HDDVs and transferring for new vehicles, totaling 7,867 cases. In addition, this plan would also help EPA to officially approve the subsidy eligibility for 149 repair shops, eight imported and three domestic diesel particulate filter (DPF) vendor.
During the period of the plan, nationwide correlation test of diesel emission testing stations has been finished well, only one inspection line was found to exceed the control range, showing that the quality of testing stations for diesel vehicles is favorable. Finally, the statistics of the past six years shows that through irregular inspection of diesel vehicles, the country-wide opacity disqualification rate dropped from 6.7% to 4.2%, indicating emission by diesel vehicles has improved year by year.
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