Exhaust Gas RECIRCULATION: Description

Exhaust gas recirculation allows a predetermined amount of hot exhaust gas to recirculate and dilute incoming air/fuel mixture. This reduces peak flame temperature during combustion, thereby reducing NOx emission. System consists of an EGR valve, timer, vacuum solenoid, vacuum amplifier, charge temperature switch (light duty), CCEGR valve (heavy duty) and an EGR maintenance reminder.