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"National VI" standard will achieve the eight more stringent new standards for vehicle emissions interpretation

Beijing, 23 Dec (Xinhua) - The "National VI" standard will become even more stringent - the director of the Department of Atmospheric Administration of the Ministry of Environmental Protection (MEP) interprets the new standards for vehicle emissions
 
"Light vehicle pollutant emission limits and measurement methods (China's sixth stage)" that the light truck country six standard 23 officially released. What are the changes in the new standards? How to implement standards? On these hot issues, the reporter interviewed the Environmental Protection Department of Environmental Management Division Liu Bingjiang.
 
Q: Why should we formulate a more "national six" standard based on national conditions?
 
A: As of the end of 2015, China's car ownership exceeded 170 million, of which about 150 million light vehicles. It is estimated that in 2015 the total emissions of four motor vehicle emissions of 45.332 million tons, of which the proportion of vehicle emissions of pollutants: carbon monoxide accounted for 86.9%, 83.3% of hydrocarbons, nitrogen oxides accounted for 92.2 %, 95.7% of the particulate matter.
 
At the same time, the overall technical level of China's automobile and the international advanced level is still a gap, high-end products are still foreign or joint venture monopoly. Based on the global technical regulations, the China Light Vehicle Standard 6 has introduced the advanced contents of European standards and American standards, taking into account the improvement of environmental quality in China, and has formed a new independent technical standard.
 
Q: Which vehicles are applicable to the "State VI" standard?
 
A: China according to the maximum total quality of the car is divided into light vehicles and heavy vehicles. This standard applies to M1, M2 and N1 vehicles with a maximum gross mass not exceeding 3500 kg.
 
Light-duty vehicles include light-duty petrol vehicles, light-duty gas vehicles, light-duty diesel vehicles and light dual-use fuel vehicles, depending on the type of fuel.
 
Q: What are the changes to the new standards compared with the current standards?
 
A: The new standard is the current "national five" standard upgrade. Compared with the current standards, the new standard has the following eight major differences:
 
First, the test cycle is different from the cold start of the vehicle, acceleration and deceleration and high-speed large-load state emissions under a comprehensive assessment, covering a larger engine operating range, the vehicle emission control performance put forward higher requirements.
 
Second, the testing procedures require different, with more stringent testing requirements, effectively avoid the use of standard flaws in the automotive industry to get a beautiful test data, but in actual use is not satisfactory behavior.
 
Third, the limits of strict requirements, compared to the "National Five" tightened by 40% to 50%, in addition, with the national five-stage gasoline and diesel vehicles using different limits compared to the "National VI" standard according to the principle of fuel neutrality , The same limits for gasoline and diesel vehicles using the requirements.
 
Fourth, the new increase in the actual road driving emissions, the first emissions test from the laboratory to the actual road, requiring the car to be tested in the laboratory standards, but also in urban areas, suburbs and highways, under normal driving conditions Using portable emission test equipment for exhaust testing, can effectively avoid the discharge of cheating.
 
Fifth, strict emission control requirements. "National Five" standard, the estimated average annual gasoline and gasoline cycling around 8.8kg of oil and gas. "National VI" standards for gasoline vaporization emission control put forward stringent requirements, but also requires vehicles to install ORVR oil and gas online recovery device, increase the oil and gas control process.
 
Sixth, to increase the emission warranty period requirements, requiring 3 years or 60,000 km, if the vehicle emissions related failure and damage, resulting in excessive emissions from the car manufacturers bear the appropriate maintenance and replacement parts of all costs, security Owners' equity.
 
Seven is to improve the low-temperature test requirements, compared to the "National Five" of carbon monoxide and hydrocarbon limits stricter 1/3, but also increased the control of nitrogen oxides requirements, effective control of winter vehicles cold start emissions.
 
Eight is the introduction of a strict US onboard diagnostic system (OBD) control requirements, to enhance the real-time monitoring of vehicle emissions state of the ability to detect vehicle emissions failure.
 
Q: When will the new standards be implemented?
 
A: The implementation of the "national six" standard will greatly reduce the vehicle's pollutant emissions. Taking into account the preparation of automotive technology upgrades, the introduction of China's severe air quality situation and so on, and ultimately determine: the standard from the date of publication, you can follow the standards for type testing. Since July 1, 2020, all sales and registration of light vehicles should meet the requirements of this standard 6a limit. Since July 1, 2023, all sales and registration of light vehicles should meet the requirements of this standard 6b limit.
 
Q: Compared with international emission standards, the new standard control level?
 
A: Only from the limit level, the state limit of 6a stage is slightly more stringent than the European level of the sixth stage of emission standards, the United States Tier3 emission standards than the requirements of loose; country 6b phase limit is basically equivalent to the United States Tier3 emission standards Of the 2020 limit set by the average car. If taking into account the different test procedures, it can be said, "National VI" standard is currently the world's most stringent emission standards.
 
Q: What are the technical and economic costs of standard implementation?
 
A: The implementation of new standards, mainly to improve the catalyst in the catalytic converter, improve the fuel system sealing and so on. As China's "National Five" diesel emission limits before the lower, so the difficulty of upgrading diesel vehicles than gasoline vehicles. Light petrol car to upgrade the cost of about 1,200 yuan, light diesel vehicles to upgrade the cost of about 4000 yuan. But with the development of parts industry, the cost will be gradually reduced.
 
National Standards Committee has carried out the "National VI" vehicle fuel standard-setting work, petrochemical enterprises have also been prepared to upgrade the oil is expected to be in 2020 with the implementation of national emission standards for the six oil supply conditions. (Xinhua News Agency reporter Gao Jing)

Updated:2017-01-17   Click:69   Source: JenLiNE

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