Answer / kkumar

EGR means Exhaust Gas Recirculation. The main function of
EGR is to control NOx emission from the engine.
At elevated temperature (during long run & full condition)
if due to some reasons engine gets heated up beyond certain
level... it produces NOx emission. In order to avoid this
pollution , we have to control the temperature rise inside
the cylinder. This can be achieved by mixing some amount of
exhaust gas with intake air. By doing this the temperature
inside the combustion chamber is reduced. And NOx is controlled.

Answer / gopal

The function of EGR valve is to allow Few percentage the
exhaust gas to the combustion chamber to Reduce NOx. This
valve is non return valve & is controlled ECU( engine
control unit ).

Answer / karthick

exhaust gas recirculation-high temperature inside the
combustion chamber emits NOx which combines with
hydrocarbons to form smog.to reduce this,some part of
exhaust gases is mixed with intake air.as the exhaust gases
have already been burned,so it doesn't burn again.this
reduces the temperature to hundred degree and thereby
reduces NOx emissions

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