EGR Air Flow Control Valve: Operation

Fig 1: EGR And Air Control Valve

Courtesy of DAIMLERCHRYSLER CORP.

1 - REAR OF INTAKE MANIFOLD	4 - EGR VALVE COOLER
2 - AIR INLET ELBOW	5 - EGR VALVE
3 - EGR AIR CONTROL VALVE	6 - ENGINE

The EGR air flow control valve is a plus width modulated control valve that is operated by the ECM in line with the EGR flow quantity required to remain inside the emissions target. See Fig 1.