EGR System

EGR System 



Exhaust gas recirculation (EGR) is a method of controlling NOx emissions applicable to a wide range of diesel engines, from light, medium and heavy duty diesel. engines to two-stroke low speed engines. These EGR systems are also found in many categories of engines with auto cycles (typically four-stroke engines)...,


       Most EGR systems include the following major hardware components:

01: One or more EGR control valves

02: One or more EGR coolers

03: Pipes, flanges and gaskets A number of other specialized components are possible in different types of systems.

    Common examples are mixers using venturi nozzles (venturi mixers or venturi pumps) and EGR pumps, also known as EGR blowers, which are powered by an electric motor or mechanical connection to the

      engine. A small tube from the exhaust pipe takes part of the exhaust gas from the intake... Because that part of the gas is very hot, it passes through a cooler and gets it...           The other end of this pipe is attached to the EGR control valve... and a pipe is connected from the inlet manifold to this EGR valve.        When the engine is running, the combustion chamber gets very hot... after this temperature exceeds 2000°C, harmful gases are released. ... that means Nox. This is very harmful to the human body (lungs).       

Then how to reduce that heat..
     
   
     We know that carbon dioxide is a heat-absorbing gas... By applying a certain amount of carbon dioxide from the exhaust pipe back to the engine, this combustion chamber is controlled to overheat... Then the formation of this Nox is reduced. .. This formation of Nox is 100 % cannot be stopped.. Another advantage of this is that the engine is cooled internally...
       this EGR valve is operated automatically or by a control unit... then the formation of Nox by eliminating this connection only when necessary. Controlling..



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