As a recap, Exhaust Gas Recirculation Coolers (EGR) cool the exhaust gases, and reduce nitrogen oxide emissions (NOx) for heavy duty internal combustion engines to meet emissions standards set by the US Environmental Protection Agency.

Exhaust Gas Recirculation (EGR) revolutionized diesel engines by enhancing their efficiency and reliability, empowering commercial fleets to mitigate operational costs. But what's the backstory of EGR systems? How do they function, and what different types are there that you should be aware of to ensure your fleet runs with optimal cost-effectiveness.

In this article we’ll go through the following topics: