Turbocharger Vane Position Sensor: Description and Operation

Position Sensor







A contactless incremental Hall sensor is used to detect the position of the output shaft. The hybrid electronics integrated in the adjuster housing is responsible for position control and control of the DC motor. The sensor magnet wheel is mounted on the DC motor shaft, while the sensor (pick-up) itself is located on the hybrid electronics. The main advantage of the contactless sensor is freedom from wear.

In addition to digital position control and related setpoint/actual value evaluation and driver control, the electronic components also perform actual value output as well as diagnostic and fault detection routines.

Each boost pressure adjuster is connected to the DME control unit by two signal lines. The DME control unit sends a setpoint (PWM signal) or special pulse/duty ratios (e.g. command to travel to and learn end stops) via one of the lines. The electric boost pressure adjuster then sends the actual value (PWM signal) and special pulse/duty ratios (self-diagnosis of electric adjuster for fault memory entry in the DME) to the DME via the other line.