The Lowdown on Tier 4 Engines

The country is moving into a new direction for going green. Now more than ever, we have the knowledge and technology to undo most of the harm that our forefathers have brought to the world with the pollution that was spewed in the air from the industrial revolution. Emissions leaked into the air from automobiles have been severely reduced due to health and safety laws that have been put in place, but we still have a ways to go.
This is why we have Tier 4 engines to meet the new emission standards and regulations.
Tier 4 engines and the timeline for its development is strictly based on the size of the engine itself. Any new Tier 4 Final engines are in development to reduce the presence of a couple of pollutants that have caused a great deal of harm to the environment. The first pollutant is called particulate matter or PM for short. PM is the collection od all solid and liquid particles shot into the air from the exhaust that has been known to be hazardous to our health. This is a complex combination of inorganic and organic particles. PMs are known for causing severe adverse reactions to the respiratory system and are a critical factor in an individuals ability to develop health issues in the future. Some of the most common of these particles from our engines are smoke.

The other compound that will be reduced from emissions will be Nitrogen Oxides or NOx for short. NOx is known to create ground-level ozone. Nitrogen Oxides happen when you combine both nitrogen and oxygen. This turns into pollution in the form of nitric oxide and nitrogen dioxide, both of which are toxic to us. These toxic gases cause the formation of smog and acid rain, while simultaneously wreaking havoc on our tropospheric ozone.

So what are the factors in determining the need for a tier 4 engine? Well, of course, the engine size plays a huge roll in determining if the engine would need an upgrade. You can look at “The road to Tier 4 engine emission standards” chart, and you can examine the way the trend is going annually. The chart is broken down by horsepower and engine year built. From the chart, Horsepower or HP greater than 11 up 75 bean Tier 4 in 2015. Engines with HP greater than or equal to 75, up to 100 began in 2014, along with HP greater than or equal to 600. Any engines with Horsepower more significant than or equal to 750 HP began in 2015.

There are several Tiers when making an engine: Tier 1, Tier 2, Tier 3, Tier 3 flex, Tier 4i, Tier 4i flex, and Tier 4. In 2007 the EP standards for stationary diesel engines went into effect, and in 2015, the final tier 4 standards went into effect for all stationary gen-sets, further lowering acceptable PM emissions. As these standards continue to improve, I foresee a cleaner air space for everyone, on and off the road.