Exhaust gas recirculation - Wikipedia
In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide (NO x) emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. [1]
What Is an EGR Valve and What Does It Do? - Cars.com
Jul 27, 2025 · EGR stands for exhaust gas recirculation, and the EGR valve is part of a system that recirculates exhaust gas back into the engine’s intake manifold for a return trip to the cylinders it just...
Egr Explained: What It Does And How It Affects Your Car
Jul 6, 2025 · EGR stands for Exhaust Gas Recirculation, a vehicle emissions control concept used in both gasoline and diesel engines. The EGR valve is a key component of a car's exhaust system and …
Exhaust Gas Recirculation - DieselNet
Exhaust gas recirculation (EGR) is an emission control technology allowing significant NOx emission reductions from most types of diesel engines: from light-duty engines through medium- and heavy …
EGR, DPF & SCR 101: How Modern Diesel Emissions Work (and Last)
Jan 5, 2026 · EGR, DPF & SCR: How Modern Diesel Emissions Work—and How to Keep Them Happy Understand the team: EGR reduces NOx formation in-cylinder, the DPF traps soot, and SCR …
EGR: What It Is, How It Works, Benefits, Limitations, Common Problems ...
May 16, 2025 · Explore everything you need to know about Exhaust Gas Recirculation (EGR) systems in this comprehensive guide. Learn how diesel EGR works, how to maintain your EGR valve in diesel …
What Is an EGR System and How Does It Work? - Engineer Fix
Exhaust Gas Recirculation (EGR) is a technology found in most modern gasoline and diesel engines. This system manages emissions by routing a portion of the engine’s spent exhaust gases back into …
Exhaust Gas Recirculation (EGR) complete guide – introduction
Tutorial on how Exhaust Gas Recirculation (EGR) works, its impact on the pollutant emission, types of EGR and the potential damaging effect on the engine
What Is an EGR Valve in a Car and What Does it Do? - AutoZone
The EGR valve routes a portion of your exhaust gases into the engine’s intake to reduce combustion temperatures. This helps prevent the formation of Nitrogen Oxides, or NOx, which are pollutants.
The exhaust gas recirculation system explained | DENSO
Jul 2, 2025 · Contrary to popular belief, exhaust gas recirculation (EGR) valves are not intended as part of an exhaust gas purification system. Instead, the EGR system is designed to influence the air fuel …