Integrated Electronic EGR System
The integrated electronic EGR valve functions similar to a ported EGR valve with a remote vacuum regulator. The internal solenoid is normally open, which causes the vacuum signal to be vented off to the atmosphere when EGR is not controlled by the ECM. This EGR valve has a sealed cap. The solenoid valve opens and closes the vacuum signal, which controls the amount of vacuum vented to atmosphere. This controls the amount of vacuum applied to the diaphragm.
The electronic EGR valve contains a voltage regulator, which converts ECM signal and regulates current to the solenoid. The ECM controls EGR flow with a pulse width modulated signal based on airflow, Throttle Position Sensor (TPS), and RPM. This system also contains a pintle position sensor, which works similar to a TPS sensor. As EGR flow is increased, the sensor output increases.