GENERAL INFORMATION (EXHAUST
GAS RECIRCULATION SYSTEM) <4M41>
The electronically controlled exhaust gas
recirculation system consists of
an exhaust gas recirculation valve, engine-ECU and sensors.
The
exhaust gas recirculation valve aims at reducing the amount of NOx
(nitric oxide)
discharge that increases with the rise in the exhaust gas temperature.
Thus, the engine-ECU
optimally controls the exhaust gas temperature in accordance with the
operating conditions of
the engine.
To further improve the exhaust gas reduction performance,
the system provides the engine-ECU feedback
on the exhaust gas recirculation valve opening. Thus, it effects exhaust
gas recirculation control
to optimize the operating conditions of the engine.
SYSTEM DIAGRAM