Diesel Emission Control Systems Tier 4 and Tier 5: Advancing Towards Significant Pollution Reduction
Diesel engines are known to be a major source of pollutant emissions, particularly nitrogen oxides (NOx) and fine particulate matter (PM). To curb these emissions, environmental regulations have progressively tightened over the years, leading to increasingly stringent standards set by the United States and the European Union. The Tier 4 and Tier 5 diesel emission control systems represent the latest advancements in this evolution. Tier 4 standards, introduced in 2008, aim to reduce NOx and PM emissions, while Tier 5 standards, expected to take effect in 2025, will enforce even greater reductions.


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