Does EGR system Decrease Engine Power? You will be shocked to know that the EGR system in automobiles decreases the volumetric efficiency as well as power output. Yes, you heard it right. Then, you must be thinking. why are we using EGR? What it actually does? Does it do any other thing to the engine? All these doubts and topics are covered in this article. Let's get started. Little Intro to EGR EGR stands for Exhaust Gas Recirculation System . It is part of em mission control system in an automobile vehicle. It has zero roles in increasing engine power. It is used in vehicles to stop the formation of NOx gas. Which are very harmful to nature. Generally, when a vehicle runs on the road it produces lots of smoke and pollutants like carbon monoxide, carbon dioxide, and the most dangerous one i.e. oxides of nitrogen . Formation of NOx Fas Inside Engines Cylinder It is essential to know how and when NOx is formed inside an engine's combustion chamber. Nitrogen and oxygen are...