| 英文摘要 |
In an effort to improve the air quality in Taipei City and offer the citizens a clean and fresh living environment and in accordance with the objectives and spirits of 「Air Pollution Control Act」, In this year the Department of Environmental Protection of Taipei City Government has enforced periodic inspection, modification and maintenance ,so that the effective refinement for the condition of air quality and the effect of pollution reduction plus environmental protection in Taipei City are achievable.
The motor vehicles with diesel engine within the Taipei city area were targeted in this project. Through the approaches of citizens’ violation reporting and judgment by visual determination of smoke, motor vehicles with diesel engine were notified to report to the station for testing. As for the sampling inspection of fuel product, the methods of in-station fuel sampling and block-to-test at roadside were carried out for the purpose of controlling the illegal fuel in possession of excessive sulfur content.
There were 8,868 motor vehicles with diesel engine tested in total with 565 tested vehicles rejected which aren’t reach the legal h.p rate and 102 tested vehicles rejected which rotational speed insufficiency, during the implementing period of this project. But in completes the examination in quantity, 98 years to examine the vehicle age to concentrate in 4~6 years and 6~8 years, because mainly 98 year impetus bus special-purpose road marker case, the bus occupies the whole to examine above the proportion 38%, but is examined the bus vehicle age to be new, therefore creates this situation; and the degree of pollution goes up with the age roughly, the vehicles of 10 ~ 12 years old have the highest failure rate; the most of the tested vehicles have been driving 500,000 kilometers, the pollution is increase along with the mileage while the vehicles that have been driving 50,000 kilometers to 15,0000 kilometers access a higher failure rate.
During the period of enforcing the product, there are 128,006 motor vehicle with diesel engine in total performed the judgment by visual determination of smoke, 2,506 vehicles were screened and notified to report to the Station for testing, 36 vehicles amongst the 1,073 tested vehicles failed to pass the test, the failure rate is 3.4%. For the age of vehicle, most of the visually determined vehicles are10~12 years old. For model of vehicle, most of visually determined vehicles are private-heavy trucks and private- light truck while the business- town bus have the highest failure rate. Most of the test rejected vehicles, which aren’t reach the legal h.p rate, are private-light truck with an age ranging from 10 years to 12 years. Their condition of maintenance is mostly done by service providers of inspection agent.
In the aspect of sampling inspection of fuel product, the failure rate has slightly dropped because of an mandatory measure to reduce the sulfur content in the diesel fuel product from 350ppm to 50ppm has been put into practice from January 1, 2005. Nevertheless, the average sulfur content has been noticeably decreasing. It is thus evident that sulfur content in fuel product is truly in a dropping tendency after the supply of super diesel fuel from China Petroleum Company incepted in October 2004. During the period of 98’s project, spot check 6,377 samplings. there are 655 sampling of 677 delivers to the research center to make the examination, and 1 of them failed to pass the test of fuel product inspection, the failure rate is 0.15%（1/655）.
In addition, performed the method of test for exhaust smoke under no-load and rapid acceleration for diesel automobiles at roadside mainly focusing on the road section where motor vehicles with diesel engine come and go frequently. According to the outcomes after performing the block-to-test at roadside, the failure rate is 26.2%, therein, as for the age of vehicle, degree of pollution becomes severe when vehicles get old ; considering the model of vehicle, special business - heavy trucks and private- heavy trucks have the highest degree of pollution.
According to the estimated reduction volume of pollutant emission, the beneficial results of improvement is originated from the correction of pollution for highly polluted vehicles that failed to pass the test and vehicle’s beforehand modification. Reduction of particulate pollutant by 149.2 tons/year from this project is estimated in accordance with the annual driving mileage of Environmental Protection Administration.
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