Device features

Exhaust gas recirculation is used to reduce exhaust emissions (by reducing the formation of oxides of nitrogen). At high temperature combustion air-fuel mixture in the combustion chamber of a large amount of nitrogen oxides. After recirculation to the engine returns a part of exhaust gases for afterburning, which reduces the concentration of fresh air-fuel mixture, and therefore the temperature in the combustion chamber.

The main element of the system - the recirculation valve mounted on the inlet pipe, which at large angles of opening of the throttle valve passes the afterburner in the intake tract of the exhaust gases from the exhaust manifold through the channels in the pipe flange and the exhaust manifold into the intake pipe. Controls pneumatic valve solenoid valve, which in turn controls the engine control unit.

Exhaust gas recirculation is not working under the following conditions:

- Low engine coolant temperature;

- The engine idling;

- Engine running at full throttle.

Failure recirculation valve leads to increased emissions. Valves, non-collapsible, in case of failure they are replaced in the assembly.