Abstract: An encoder wheel for an internal combustion engine, having six indicator elements, which are arranged spaced apart from one another in the circumferential direction with respect to a rotational axis of the encoder wheel on a main body of the encoder wheel. Flanks arranged in the same direction of the indicator elements are arranged equidistantly to one another in the circumferential direction. The indicator elements each have one of three different indicator element extensions in the circumferential direction.

Abstract: The invention relates to an internal combustion engine having an intake air line, which contains both a compressor of an exhaust gas turbocharger and a throttle flap, as well as having a tank ventilation system and a crankcase ventilation system, both of which are connected to the intake air line at two connecting points upstream of the compressor and behind the throttle flap. In order to make it possible to monitor the inlet points of the ventilation gases into the intake air line in a relatively simple way, the invention proposes that a non-return valve be mounted directly at each of the connecting points.