Views: 736 Author: Site Editor Publish Time: 2021-12-16 Origin: Site
In December 2020, the Ministry of Ecology and Environment (MEE) of China updated the China IV non-road tailpipe emission standards, setting new requirements for particle number (PN) limits, the use of Global Positioning System (GPS) tracking systems, and portable emissions measurement system (PEMS) testing for improved real-world compliance. The new requirements were released in the form of amendments to the Limits and Measurement Methods for Exhaust Pollutants from Diesel Engines of Non-Road Mobile Machinery (China III, IV) (GB 20891-2014).
The updated China IV standards will phase in from December 2022 for all diesel nonroad equipment with engine sizes smaller than 560kW, and for diesel three-wheeler trucks.2 In addition, the MEE released Emissions Control Technical Requirements of Non-Road Diesel Mobile Machinery (HJ 1014-2020) as supplemental guidance regarding technical specifications.
As the market for non-road equipment in China has grown, so have tailpipe emissions. By 2019, the country’s stock of construction equipment had reached about eight million units and agricultural equipment totaled about 40 million units. Those two segments account for about 90% of the non-road market.4 Nitrogen oxide (NOx) emissions from construction and agricultural equipment reached more than 3.3 million tons in 2019, and particulate matter (PM) emissions totaled some 0.2 million tons.5 That equates to almost 56% of the PM emitted by all mobile sources. For comparison, the 340 million on-road vehicles contributed 24% of total PM emissions.
from mobile sources.5 The high levels of PM from construction and agricultural equipment highlight the urgent need to reduce particle emissions. China has followed the European pathway in regulating tailpipe emissions of nonroad equipment, rolling out regulations in stages: » China I and II. The country’s efforts started in 2007, with adoption of the Limits and Measurement Methods for Exhaust Pollutants from Diesel Engines of Non-Road Mobile Machinery (China I and II) (GB20891-2007).6 China I phased in starting in October 2007, with China II beginning in October 2009. Those standards generally followed the requirements of European Union (EU) Stage I and II non-road emission standards, though with some amendments. » China III and IV. In 2014, the MEE released the Limits and Measurement Methods for Exhaust Pollutants from Diesel Engines of Non-Road Mobile Machinery (China III and IV) (GB 20891-2014), with limits and measurement methods set for China III, which was equivalent to Euro Stage IIIA non-road emission standards.7 These China III standards were phased in from October 2014. That document included advance notice of emission limits for the next regulatory step, China IV (Euro Stage IIIB equivalent), but without an implementation timeline.