Exhaust standard blanking technology blank

Replacement of missing vehicle detection technology blank font size

Automobile exhaust testing will have a unified standard.

Recently, the "Technical Specifications and Test Procedures for Exhaust Contaminant Measurement Systems for Light Vehicles under Simple Transient Operating Conditions" passed an expert review. In order to standardize the construction and operation of exhaust pollutant measurement systems for light-duty vehicles with transient transient conditions, Shandong Provincial Environmental Protection Bureau commissioned Driveway (Shandong) Detection Technology Co., Ltd. to compile this standard and proposed consistency in the detection of complete sets of equipment. Repetitive technical indicator requirements.

“At present, haze has seriously affected people’s physical health and living environment. The main source of pollution is motor vehicle exhaust emissions. Shandong Province’s motor vehicle inspection work is not satisfactory and the data error is large, which affects the vehicle’s pollutants. To achieve the goal of blue sky and white cloud as soon as possible, it is necessary to establish an accurate, uniform, controllable, and rigorous technical standard to strengthen the management of motor vehicles, limit the number of vehicles passing the standard and phase out high-pollution vehicles.” On the 9th, the National Motor Vehicle Pollution Prevention and Control Program Yan Yuqing, deputy director of the committee, said in an interview with the Economic Herald.

“The implementation of this standard will further regulate the motor vehicle inspection market, and it is of great significance to strengthen motor vehicle management, control vehicle pollutant emissions, and improve atmospheric environmental quality.” The reporter said. A high-polluting vehicle emits equivalent to 15 qualified vehicles. “Continuously increasing the emission standards of new vehicles does not necessarily reduce the amount of pollution. The focus of pollution reduction is on the control of emissions from vehicle emissions,” Yan said.

Yan Yuqing explained that the motor vehicle emits pollutants only during driving and when the engine is waiting to be driven. If the maintenance is not completed, it causes plugging of the three filters, air-fuel ratio imbalance, excessive engine carbon deposition, post-purifier failure, or engine aging. It will cause serious pollution from motor vehicle emissions; the production of new vehicles and the stoppage of vehicles will not emit pollution, that is, only those vehicles that are sold to society and are in use will emit pollutants.

It has been estimated that the emissions of highly polluting vehicles will be between 7.2 grams and 40 grams per kilometre, and the amount of pollution will be equivalent to 4 to 20 times the number of vehicles that emit less than 2 grams per kilometre.

"The emission of pollutants from a heavily polluted vehicle is equivalent to the emission of more than 15 qualified vehicles."

Yan Xiaoqing analyzed Beijing as an example. Eliminating 2% of highly polluting vehicles was equivalent to cutting the emission of 1.5 million vehicles below 2 grams, which accounted for about 25% of the total vehicle emissions; for economic development and solving people’s needs , Beijing allowed to add about 500,000 vehicles per year, as well as emissions of 1 million is cut, repaired qualified 13%, plus 2% out of the total vehicle can reduce vehicle emissions by more than 50%, according to The calculation of the total emission of motor vehicles in Beijing's atmosphere is about 60%, which controls and reduces air pollution by more than 30%.

In 1983, China promulgated the Law on the Prevention and Control of Atmospheric Pollution, which put forward requirements for the detection of emissions from motor vehicles. With the continuous development of detection technology, there are no shortages of double-idle speed method, simple steady-state operating mode method, and simple transient working condition method for in-use vehicle emission pollution detection technology. Because the detection accuracy of the double idle method is less than 50%, the accuracy of the simple steady state operating method is only about 75%, and the simple transient working condition method can reach more than 95%. Therefore, the simple transient condition method has become a widely recommended detection method in the automotive exhaust gas inspection industry. How to control the exhaust pollution of motor vehicles in Los Angeles has become a global research topic. There are no shortages of successful experiences to learn from.

Yan Yuqing cited the example of the use of simple transient method testing in Los Angeles to successfully manage vehicle exhaust pollution.

Due to the serious impact of Los Angeles' "Smoke and haze" incident, the United States conducted an in-depth study on the pollution control of motor vehicles and found that the use of motor vehicle emissions accounted for more than 80% of the air, and 10% to 15% of vehicles in use were seriously excessively discharged. The pollution amount accounts for 50% to 60% of the total emissions in the entire region. The United States has implemented a strict "I/M system" for this, and the "I" (testing system) implemented in the I/M system is to find out that 10 % to 15% of "highly polluting vehicles"; the United States has legislation in various states that requires the use of "simple transient detection technology" to test vehicles. The technical quality assessment of testing equipment is very strict. At present, only three companies have passed technical quality assessment.

“The United States implemented the Car I/M Plan from 1984 to 1993. According to the analysis of the US Environmental Protection Agency, the United States reduced carbon monoxide emissions by 40%, ozone pollutant emissions by 21%, nitrogen oxides and carbon. gaseous hydrogen compound formed by lead emissions by 86%, PM10 particles reduced by 20% reduction of contaminant 110 tons per day. Therefore, the control of air pollution in the United States a very short time. "Yan Zi said clearance.