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EGR Electronic Vacuum Regulator Solenoid|Description and Operation|Page 4334 > < Liquid Vapor Separator, Evaporative System|Service Precautions|Page 4329
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EGR Electronic Vacuum Regulator Solenoid: Description and Operation

EGR VACUUM REGULATOR SOLENOID

EGR Vacuum Regulator Solenoid

Test Graph

EGR Vacuum Regulator Solenoid Data Chart

The EGR vacuum regulator solenoid (Figure 88) is an electromagnetic device which is used to regulate the vacuum supply to the EGR valve. The 
solenoid contains a coil which magnetically controls the position of a disc to regulate the vacuum. As the duty cycle to the coil increases, the vacuum
signal passed through the solenoid to the EGR valve also increases. Vacuum not directed to the EGR valve is vented through the solenoid vent to
atmosphere. Note that at 0% duty cycle (no electrical signal applied), the EGR vacuum regulator solenoid allows some vacuum to pass, but not enough
to open the EGR valve.

EGR Electronic Vacuum Regulator Solenoid|Description and Operation|Page 4334 > < Liquid Vapor Separator, Evaporative System|Service Precautions|Page 4329