A device (1) for determining the position of an internal combustion engine, includes an incremental-type sensor (2) having a rotary part (8) which is connected to the rotary body, and a fixed part (6) which is provided with first elements for detecting the rotation of an increment between the mobile part (8) and the fixed part (6), second elements for detecting the direction of rotation between the mobile part (8) and the fixed part (6), and analysis elements which are connected to the first elements and the second elements and are used to determine the angular position of the rotary body in relation to the reference position. The device also includes engine controlling elements (4) which are connected to the analysis elements (12) of the sensor (2), and the sensor (2) is permanently electrically (34) fed in the device.