According to the official news of the Ministry of Ecology and Environmental Protection on November 29, 2022，Countdown to the Implementation of Phase IV Emission Standards for Non-road Mobile Machinery，The fourth phase of emission standards for non-road mobile machinery will be issued tomorrow.（December 1, 2022）Formal implementation。

There are many kinds of off-road mobile machinery.、And that application field is wide，Including construction machinery、Agricultural Machinery、Garden Machinery、Generator set、Fishery machinery and airport ground service equipment.，Construction machinery and agricultural machinery accounted for the highest proportion.。《China Mobile Source Environmental Management Annual Report》Show，Of these two types of machinery in 2020 NOxAndPMEmissions reached 316.60,000 tons and 16.80,000 tons，Approximately 28% of total mobile source emission%And 55%。In order to implement《Air Pollution Prevention and Control Law》，Further strengthen the pollution prevention and control of non-road mobile machinery，Our department released it in 2014.《Limits and measurement methods for exhaust pollutants from diesel engines of non-road mobile machinery（China is the third、Four stages）》（GB 20891—2014），Require the implementation of the third phase of emission standards on October 1, 2015。January 2021，Our department combines the needs of environmental management and the situation of the industry，On the basis of the third stage，Revise and improve the technical requirements and implementation time of the fourth phase，The General Administration of Joint Market Supervision issued the fourth phase of the emission standard amendment.（Hereinafter referred to as the Fourth National Standard），Require the implementation of the Fourth National Standard on December 1, 2022。

The Implementation of the Fourth National Standard Promotes the Emission Control of Non-road Mobile Machinery in China to a New Stage。One is to upgrade emission control technology.。Selective catalytic reduction device（SCR）And a particulate trap（DPF）The application of advanced emission control technologies in the field of off-road mobile machinery has been greatly improved.，Promote the further development of diesel engine and related parts industry。Second, improve the effect of environmental supervision.。Remote monitoring of emission control system operation，To ensure its normal use in the actual process.，Prevent failure or destruction of pollution control devices。Third, enhance the international competitiveness of products.。Emission control levels and technical requirements and Europe、The United States has the same standard at this stage.，Achieve international integration，At the same time, it is more advanced in the actual emission test of the whole machine.。Fourth, improve the contribution of air environmental quality.。NOx、HCAndPMThe emission limits have been raised.，It is estimated that，Reduce emissions by 2025NOx 37.50,000 tons、PM 3.20,000 tons，The proportion of emission reduction reached 12..5%And 19.3%。

Implement the Fourth National Standard for Non-road Mobile Machinery in accordance with the law and regulations。《Air Pollution Prevention and Control Law》Regulation，Production is prohibited、Import or sale of non-road mobile machinery whose emission of atmospheric pollutants exceeds the standards。Production of non-road mobile machinery、Importing enterprises and distributors as the main body responsible for the implementation of emission standards，Relevant work should be carried out in strict accordance with the law and regulations.。First, do a good job of standard switching.。From 1 December 2022，Nationwide implementation of the Fourth National Standard。Production is prohibited、560 imports and sales that do not meet the requirements of the Fourth National Standard kWFollowing（Including 560 kW）Non-road diesel mobile machinery and diesel engines。Enterprises should complete the inventory clearance of the third country and the switching of the fourth production line as soon as possible before the implementation of the standard.，Prevent Guosan Machinery from continuing to sell second-hand machinery into the market。Second, do a good job of information disclosure.。Publicize the technical information of emission inspection and pollution control before the machinery leaves the factory or enters the country，And upload that information of the single mechanical machine，Ensure actual production、The imported machinery meets the requirements of the fourth national emission standard.。Tractors、Combine harvesters and other agricultural machinery，Hoisting machinery、When special equipment such as forklifts are registered and filed with relevant departments，It should also conform to the Fourth National Standard.。

The Ministry of Ecology and Environment will work with relevant departments.，Further strengthen the production of off-road mobile machinery、Supervision and inspection of import and sales links，Strictly crack down on the illegal production and sale of substandard products and the sale of substandard products by disguised second-hand machinery.，Yeah, production、Imports and sales that do not meet the requirements of the Fourth National Standard shall be punished according to law.。

Construction machinery main engine factories have released the fourth national products.，Adequate preparations have been made for the implementation of Phase IV emission standards for non-road mobile machinery。