EGR Solenoid Vacuum Valve Assembly

This assembly consists of 2 solenoid valves, one to supply vacuum to the EGR valve when energized, the other vents EGR vacuum source to the atmosphere when de-energized. Solenoids are controlled by the ECA. The vacuum supply line has a restrictor in its inlet port to reduce its flow compared to the vent solenoid, which is unrestricted.

The dual EGR solenoid valve assembly consists of one vacuum valve that supplies vacuum to the EGR valve when it is energized and a vent valve that vents EGR vacuum to the atmosphere when de-energized. Both valves receive signals from the ECU. A restrictor is added in the vacuum valve inlet port so the vent valve may vent if the vacuum valve sticks open.