Abstract: In an actuator, an electric motor having a pinion is disposed, which engages directly in the teeth of a gear wheel having spline teeth, which is fixedly connected directly to the drive shaft, on which the valve flap is disposed. A use of the actuator for actuating an exhaust gas recirculation valve of a motor vehicle.

Abstract: The exhaust gas recirculation valve comprises a tubular valve housing includes a gas inlet, a first gas outlet and a second gas outlet located proximate thereto. Located inside the tubular valve housing is a rotatably supported valve body that is designed as a hollow body having a semi-cylindrical lateral surface having a lateral penetration opening. The gas inlet as seen from the top includes a blocking wall on the side thereof facing the first gas outlet and the second gas outlet, the blocking wall being located inside the valve housing perpendicular thereto and having a height equal to at least the length of the valve body and sitting flush against the gas passage in the closed position of the exhaust gas recirculation valve.