Valve device

A valve device comprising a valve housing with an inlet and an outlet, a valve seat which is arranged between the inlet and the outlet and comprises a valve opening, which valve opening can be closed by a valve closing member that is pressed against the valve seat by a predetermined force, and a diaphragm which acts on the valve closing member, wherein a first control chamber is separated from a second control chamber by the diaphragm, as a result of which the valve can be switched by a pressure difference between the first control chamber and the second control chamber, wherein the diaphragm is connected to the valve closing member, at least over a partial range of a possible stroke of the valve closing member, via a gear mechanism that is embodied such that a movement of the diaphragm is translated into a movement of the valve closing member at a lower speed, wherein the first control chamber is connected to the inlet via an electronic control valve, so that the first control chamber can be connected to a secondary air line via the electrical control valve when the valve device is used in a motor vehicle, wherein the first control chamber is connected to an ambient environment via a vent line when the electrical control valve is closed, so that the first control chamber is not connected to the inlet.