At Case IH, we want to help producers like you better understand what’s behind the new emission regulations and how we’re addressing them. When it comes to the technology that manufacturers are using to meet these guidelines, you’ll find some pretty big differences.
Stage IV
Diesel Engine Facts
What are PM and NOX?
Particulate Matter (PM) is composed of minute particles and pollutants, which pose serious health risks for people and animals.
Nitrogen Oxides (NOx) contribute to the cause of acid rain and ground level ozone.
SCR vs. EGR
SCR (Selective Catalytic Reduction)
The efficiency of the combustion process and smaller engine displacement, combined with greater horse power, optimises fuel consumption.
Since SCR is an after-treatment system, the engine is designed to maximize torque and power with faster response in the field.
The optimised combustion process preserves oil’s physical properties, reducing maintenance activities and related downtime.
SCR system allows the engine to reduce heat rejection of many internal engine components, leading to better reliability.
The reduction of PM inside the engine eliminates clogging problems and the need for regeneration often required with EGR.
SCR systems are more thermodynamically efficient than Tier 3/Stage IIIA engines. This allows for greater horsepower from smaller engines.
SCR systems work regardless of fuel quality and are not influenced by the presence of traditional pollutant substances in the fuel. No part of Stage V particulate control involves the use of ultra-low sulfur diesel.
SCR systems are simple. The only thing you have to do is refill the DEF at regular fuel intervals.
Pollutants produced during the combustion process are converted into harmless N2 and H2O, already present in the environment.
SCR is recognized by many engine manufacturers as the technology of the future to be compliant with Stage V.
