Designed for diesel engines exceeding 24 hp, these stringent regulations help minimize harmful emissions and meet sustainability goals set by businesses in the industry.
By Merina Shriver — Ironpros
Tier 4 Diesel Engine regulations are some of the harshest you can come by for off-highway diesel engines. These regulations are put in place for any engine over 24 hp. The Tier 4 standard is important because of its drastic improvement in human life. Emissions like nitrogen oxide (NOx) and particulate matter, also known as soot, are damaging to the lungs and can heavily damage the environment.
The guidelines put in place to manage these emissions and better handle the engines are essential to the betterment of society and the environment. Meeting Tier 4 Diesel Engine Standards While engine design faced major improvements, making diesel engines today one of the purest and cleanest types of engine available, the engines had yet to meet the Tier 4 regulations. In order to meet the regulation standards, the engine required exhaust after treatment.
These are the three main exhaust treatments available:
- Diesel Particulate Filter – This method is capable of capturing and incinerating particulate matter produced by many diesel engines.
- Exhaust Gas Recirculation – While this method helps reduce NOx production, it actually increases the particulate emissions. Due to the raised particulate emissions, in order to meet the Tier 4 standard, this method has to be used in combination with Diesel Particulate Filter.
- Selective Catalytic Reduction – This method manages to handle the emissions by adding ammonia to it in a 1:20 gal. ratio.