·Beijing light vehicle Beijing V emission standard for the first time to specify PM limit
This year, Beijing will strive to implement the national V emission standard in the country to reduce vehicle emissions. Yesterday, the Municipal Environmental Protection Bureau announced the draft of the Beijing V light vehicle emission standards. Compared with the national IV emission standard, the emission limit of nitrogen oxides in the Beijing V emission standard is strictly 25%, and the emission limit of particulate matter (PM) is also separately specified for the first time. These will effectively reduce the contribution of vehicle emissions to PM2.5.
For the first time using the "Jing" standard
The reporter noted that the previous four stages of vehicle emission standards were named Country I, Country II, Country III, and Country IV. The local standard for "Beijing stage" was solicited yesterday, and the word "national" was not used.
Relevant environmentalists said that Beijing planned to implement the national V standard in advance after the introduction of the national fifth-stage emission standards. However, the national V standard has not yet been introduced, but Beijing must strive to be the first to implement it during the year, so the local standard of the “Beijing V stage†is formulated.
"Beijing V standard is basically consistent with the European V standard in terms of pollutant emission limits," the source said. It is understood that Europe is currently implementing the European V standard. Beijing has implemented the Beijing V standard this year, and has gradually begun to synchronize with Europe in terms of motor vehicle pollution emission limits.
Nitrogen oxide emission limit reduced by 25%
In the “Beijing V Standard†for comments, the emission limits for various pollutants, including carbon monoxide, hydrocarbons, nitrogen oxides, and particulate matter, are specified. According to reports, compared with the previous National IV standard, the emission limit of nitrogen oxides in the Beijing V standard is the most obvious. The national IV standard car has a limit of 0.08 grams per kilometer of travel, while the Beijing V standard has a limit of 0.06 grams, a 25% reduction.
“Nitrogen oxides undergo a secondary chemical change and are converted to PM2.5. Nitrogen oxides are an important factor in the contribution of automotive emissions to PM2.5, so stricter NOx emission limits are used to reduce vehicle emissions to PM2. The contribution of .5 is useful," said the relevant person in charge of the Municipal Environmental Protection Bureau.
Separate particulate emission limits
In addition, in the national IV and previous emission standards, there is no separate item for particulate matter emission limits. In the Beijing V standard, the limit of PM is separately specified to be 0.0045 grams per kilometer of travel.
"Unlike diesel vehicles, gasoline vehicles generally do not directly discharge particulate matter. However, in the past one or two years, automobile manufacturers have introduced new technologies for direct injection in cylinders. The use of direct injection vehicles in the cylinders will produce some particulate matter. Therefore, the standard in Beijing V In the middle, the limit of particulate matter is specified separately.†Environmental experts say that the particles produced are basically fine particles, ie PM2.5, or even smaller particles.
Is the emission limit for 0.0045 grams high or low? According to experts, this is consistent with the relevant emission limits in the current Euro V standard.
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Exhaust gas within 160,000 km cannot exceed the standard
(Reporter Ma Li) Compared with the National IV standard, the Beijing V standard is more stringent in the effectiveness of exhaust emission standards. It has increased from 100,000 km to 160,000 km.
The relevant person in charge of the Municipal Environmental Protection Bureau said that under the national IV standard, the car must be guaranteed to travel within 100,000 kilometers, and the exhaust emissions should not exceed the standard. Under the Beijing V standard, it is necessary to ensure that the driving of 160,000 kilometers can not exceed the standard.
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