EGR Valve: Description and Operation

Fig. 27 Sub EGR Control Valve:

OPERATION
A Sub EGR Control Valve is incorporated in conjunction with the EGR system. The Sub EGR closely modulates EGR flow in response to throttle valve opening. The Sub EGR Control Valve is an integral part of the carburetor, and is directly opened and closed through linkage that is connected to the throttle valve.