Automobile exhaust emissions have become the main source of air pollution in China, and are an important cause of smog, ash and photochemical pollution. The “Measures for Monitoring the Total Emission Reduction of Major Pollutants in the Twelfth Five-Year Plan†puts a rigid requirement on the pollution monitoring of motor vehicles. By the end of 2015, the environmental protection inspection rate of motor vehicles (including vehicles without inspection) reached 80%. Automatic bobbin changer can be install to all the sewing machine, this auto bobbin changing device can install max 8 bobbins. Automatic Pipetting Variable Device,Shuttle Hook Changing Equipment,Electronic Sewing Machine,Sewing Machine With Automatic Shuttle Shenzhen Chaocheng Sewing Technology Co., Ltd , https://www.cn-chache.com
Since the Ministry of Environmental Protection disclosed for the first time this month that the primary source of pollution in Beijing, Guangzhou and Shenzhen is motor vehicle exhaust, the problem of motor vehicle pollution has drawn more and more attention from the society.
"On the surface, there are many regulations and standards for exhaust gas detection, and there are many regulatory links. In fact, there are many chaos, lack of supervision by governments at all levels, fraudulent detection and fraud, and 'parasitic parasites'." On the 20th, the "Environmental Science Society of China" jointly held the "ring" Yao Shengzhuo, an expert in vehicle testing research at the School of Mechanical and Vehicle Engineering, Beijing University of Construction, said at the Expert Seminar on the Core Issues of Special Remediation of Inspection Institutions.
Yao Shengzhuo introduced that in the vehicle detection method, China's current detection methods for motor vehicle pollution have double idle method, transient working condition method, simple transient working condition method and simple steady state method, although the "telemetry method" is not a country. The test method for “in-vehicle exhaust gas detection standards†was issued, but at least 10 cities have been used for road inspection and enforcement; diesel vehicle emissions are mainly particulate matter and nitrogen oxides, but these two indicators are not detected in diesel vehicles. And control the scope of pollution.
“In 2011, I participated in the inspection of motor vehicle inspection stations and checked thousands of inspection lines. I still kept the inspection materials at that time. Some problems in the motor vehicle inspection process still exist today.†Han Yingjian, a researcher at the Sewage Discharge Monitoring Center, said.
“The problem of controlling software data fraud is widespread.†Han Yingjian said that after the inspection or removal of the purifier, the emissions of the vehicle did not change substantially. The same vehicle, cold and hot vehicles were detected, and the emissions were basically unchanged. The same type of car, driving 30,000 kilometers and driving 250,000 kilometers of test results, the emissions are basically unchanged.
China's "Air Pollution Prevention and Control Law" stipulates that: "When a motorized vehicle discharges pollutants into the atmosphere, it shall not exceed the prescribed discharge standards" and "the motor vehicles in use do not meet the standards for motor vehicle pollution discharge at the time of manufacture, and shall not drive on the road."
Wang Fengling, deputy secretary-general of China Automobile Maintenance Industry Association, believes that compared with previous years, China's motor vehicle inspection status should be greatly improved in recent years. "There are significant improvements in both testing methods and technological progress. â€
Han Yingjian said that the non-standard inspection has caused many hazards: the high-emission vehicles continue to drive, although the number is small, the emissions account for more, dragging the air to improve, and the detection data fraud also misleads the government. He believes that in addition to strict supervision of the inspection station, suppliers who should deal with software cheating should be cracked down according to law.
Yan Lanqing, deputy director of the National Motor Vehicle Pollution Prevention and Control Committee, said that only through strict and accurate detection can the vehicle pollution be effectively collected, and the control of high-pollution vehicles can control the exhaust pollution of vehicles.