An exhaust gas recirculation valve that includes a recirculation passage through which the exhaust gas flows; a valve seat press-fitted onto an inner surface of the recirculation passage; a valve body configured to sit on the valve seat; and a shaft extending through an inside and outside of the recirculation passage and fixed to the valve body and configured to move the valve body relative to the valve seat, in which corrosion-resistant coating is not provided on a portion of the inner surface of the recirculation passage that contacts a peripheral surface of the valve seat, and the corrosion-resistant coating is provided on another portion of the inner surface of the recirculation passage that contacts an end surface of the valve seat in a direction of press-fitting.

An exhaust gas recirculation valve that includes a recirculation passage through which the exhaust gas flows; a valve seat press-fitted onto an inner surface of the recirculation passage; a valve body configured to sit on the valve seat; and a shaft extending through an inside and outside of the recirculation passage and fixed to the valve body and configured to move the valve body relative to the valve seat, in which corrosion-resistant coating is not provided on a portion of the inner surface of the recirculation passage that contacts a peripheral surface of the valve seat, and the corrosion-resistant coating is provided on another portion of the inner surface of the recirculation passage that contacts an end surface of the valve seat in a direction of press-fitting.

A control device for an internal combustion engine includes an air intake channel, an exhaust gas recirculation channel which enters into the air intake channel, a valve seat formed at an opening at an end of the exhaust gas recirculation channel, and an elastic valve disk which is placeable on the valve seat via an actuator so that the opening of the exhaust gas recirculation channel can be closed. A plane spanned by the valve seat and/or by the valve disk forms an at least single-curved concave surface.

A valve arrangement for a motor vehicle has a valve plunger fixedly connected to a closure member, a valve housing, a valve seat, an electric motor configured to move the valve plunger, and a worm gear has an outer thread and an inner thread. The valve plunger has, at least in a sub-region, an outer thread and the valve arrangement has a threaded sleeve with an inner thread or a spindle nut with an inner thread, or the valve plunger is fixedly connected to a component having an inner thread and the valve arrangement has an outer thread. The valve plunger is connected to a first gearwheel, and the valve arrangement has at least one second gearwheel. The second gearwheel is arranged such that it can transmit a rotational movement directly, or via an intermediate gearing, to the first gearwheel.

A valve arrangement for a motor vehicle has a valve plunger fixedly connected to a closure member, a valve housing, a valve seat, an electric motor configured to move the valve plunger, and a worm gear has an outer thread and an inner thread. The valve plunger has, at least in a sub-region, an outer thread and the valve arrangement has a threaded sleeve with an inner thread or a spindle nut with an inner thread, or the valve plunger is fixedly connected to a component having an inner thread and the valve arrangement has an outer thread. The valve plunger is connected to a first gearwheel, and the valve arrangement has at least one second gearwheel. The second gearwheel is arranged such that it can transmit a rotational movement directly, or via an intermediate gearing, to the first gearwheel.

An exhaust valve includes a body defining a passage and a flap that pivots about an axis relative to the body to selectively close/open the passage. An actuator moves the flap and a device couples the flap to the actuator. This coupling device comprises: a compression spring having a proximal end that rotates about the axis with a first element between the flap and an actuator output shaft and a distal end; a seat engaged with the distal end, while the seat is fixed in rotation about the axis with the first element, and a torsionally-rigid transmission member fixed in rotation about the axis with the first element and that immobilizes the distal end relative to the proximal end in a plane that is orthogonal to the axis. The transmission member has a slot that is elongated parallel to the axis and is traversed by the distal end.

A charging device may include a turbine housing and a wastegate valve device. The wastegate valve device may include a flap, a spindle arm, a wastegate spindle, an axial stop, and a lever arm non-rotatably attached to the wastegate spindle. The wastegate spindle may be rotatably mounted in a bushing disposed on the turbine housing. A wastegate duct may be disposed in the turbine housing. The wastegate duct may have a duct aperture enclosed by a valve seat. The duct aperture, when in a closed state, may be closed by the flap of the wastegate valve device. A sealing face of the flap may be defined by a sequence of at least two conical peripheral surfaces arranged next to one another and each having a different inclination.

A valve for opening up or closing off a flow path includes: a valve disk; a valve tappet having: a central axis, a first end region adjacent to the valve disk, and a second end region facing away from the valve disk; and a transmission device configured to transmit a rotational movement into a translational movement. The transmission device includes: a toothed segment, and a rocker lever mounted so as to be rotatable, about a rocker lever axis of rotation, by a drive plate via the toothed segment. The rocker lever is connected to the valve tappet by pushrods, the pushrods being mounted rotatably in relation to the rocker lever and the valve tappet.

A valve for opening up or closing off a flow path includes: a valve disk; a valve tappet having: a central axis, a first end region adjacent to the valve disk, and a second end region facing away from the valve disk; and a transmission device configured to transmit a rotational movement into a translational movement. The transmission device includes: a toothed segment, and a rocker lever mounted so as to be rotatable, about a rocker lever axis of rotation, by a drive plate via the toothed segment. The rocker lever is connected to the valve tappet by pushrods, the pushrods being mounted rotatably in relation to the rocker lever and the valve tappet.

The invention relates to a valve for opening and closing a flow path, comprising a drive motor, comprising a valve disk, comprising a valve tappet and comprising a transmission device for converting rotational movement of the drive motor into translatory movement of the valve disk, wherein the valve disk is connected to the valve tappet and is able to be moved by way of movement of the valve tappet, wherein the transmission device is formed from flexible elements and at least one toothed segment which is mounted so as to be rotatable about an axis of rotation, wherein only tensile forces are able to be transmitted by the flexible elements, and wherein the toothed segment is able to be at least partially wrapped around by the flexible elements by way of rotational movement.