EGR Valve Position Sensor
The Exhaust Gas Recirculation (EGR) valve consists of 3 major components:
The EGR flow is determined by the engine controller. For a given set of conditions, the engine controller knows the ideal EGR flow to optimize NOx and fuel economy as a function of the pintle position. Pintle position is obtained from the position sensor. The engine controller adjusts the duty cycle of 128 Hz power supplied to the solenoid coil to obtain the correct position.