Diesel engines for non-road machinery

As of May 2023, the Chinese government has implemented the China IV exhaust emission standard, GB 20891-2014 (HJ 1014-2020) for diesel engines used in non-road machinery. This standard also covers emission standards for secondary diesel engines in logistics vehicles, and diesel-fueled ships with net power lower than 37 kW. The exhaust emission standards for small spark-ignition engines in non-road machinery or primary engines in ships are not within scope of this standard.

In July 2007, the Ministry of Ecology and Environment (MEE) published the first non-road machinery exhaust emission standard, GB 20891-2007. This introduced the China I and II exhaust emission standards for diesel engines used in non-road machinery, regulating exhaust emissions for di