A valve comprises a coupling device having a driven member bound to the drive shaft of a flap, a driving member bound to an output shaft of an actuator, and an elastic member. The driving member comprises attachments that hooks up the elastic member to the driving member in a temporary position in which the elastic member is elastically loaded. The driven member comprises at least one release member that at least partly releases the elastic member of the attachments when the coupling device is brought to an intermediate state or the elastic member, when the coupling device is in the intermediate state, may be at least partly released from the attachments. The elastic member once released, adopts a definitive use position under the effect of relaxation of the elastic load, the coupling device then adopting the operational state.

A valve having a housing in which three ducts that are connected to each another are arranged, one flap, which is mounted rotatably on a shaft is arranged in each of two ducts, an electric motor which drives a shaft by a gearing system, and a transmission mechanism, which drives the second flap depending on the movement of the first flap. On the shaft of the first flap, a cam disc is arranged, on the circumference of which a lever rests, which is connected in a rotationally fixed manner to the shaft of the second flap.

An engine including a motorized throttle valve that can implement mutually neighboring disposition of a throttle body and a cylinder head and can implement a good opening and closing responsibility thereof. A swelling portion is formed on a side wall of a valve chamber in such a manner so as to bite between those of throttle bodies which neighbor with each other in order to accept a protrusion of part of a valve system in a radial direction of first and second camshafts. An electric motor is disposed at one side of the group of the throttle bodies. A speed reduction mechanism, for transmitting output power of the electric motor to a valve shaft, is disposed between those throttle bodies, which neighbor with each other at a different location in the group of the throttle bodies, in a neighboring relationship with the valve chamber.

A method of producing a throttle device includes setting an angle between a fully closed position and a default position to a predetermined angle by processing at least one of a gear-side fully closed position stopper on a throttle gear, a body-side fully closed position stopper on a throttle body, a default position defining member, a body-side engaging portion of the throttle body, or a gear-side engaging portion of the throttle gear.

An exhaust gas flap drive for an internal combustion engine, including a driveshaft which has a central axis m, an exhaust gas flap shaft, which is indirectly connected to the driveshaft and has a central axis k, and a coupling element, which is designed as a spring. The coupling element has a first end portion which is rotationally fixed to the driveshaft, and the driveshaft has a receiving area in which the end portion is mounted. The coupling element additionally has a second end portion which is rotationally fixed to the exhaust gas flap shaft via a coupling element, and the receiving area is designed as a groove which is provided on the end face of the driveshaft. The groove has a groove base and two groove flanks which delimit a width b of the groove. The width b decreases towards the groove base, and/or the coupling element has a form-fitting connection with the second end portion in a direction of the central axis k.

When a rotating body is oriented at a default position due to the absence of a driving force, a first hook portion and a second hook portion are engaged with a fixed engagement portion and/or a movable engagement portion. When the rotating body is rotated from the default position by the driving force, the first hook portion is engaged with one of the fixed engagement portion and the movable engagement portion, and the second hook portion is engaged with the other of the fixed engagement portion and the movable engagement portion. A throttle valve device includes a pressing portion that presses the first hook portion and/or the second hook portion to apply a pressing force toward a center of a coil portion in a coil axial direction.

An exhaust system of an engine includes a plate-like valve configured to change a cross-sectional area of an exhaust passage, a drive shaft configured to rotate the valve, a bearing provided for a wall member segmenting the exhaust passage to rotatably support the valve, and a driver configured to rotate the drive shaft. The drive shaft penetrates the wall member, and includes an extension extending outside the exhaust passage. The system also includes an auxiliary bearing that rotatably supports the extension of the drive shaft. The auxiliary bearing is spaced apart from the wall member by a predetermined distance.

A coupling arrangement is disclosed for the rotational coupling of a drive element of a pivoting drive of an exhaust-gas flap for the exhaust-gas flow of a combustion engine to a pivot shaft rotatable about a pivot axis. A first coupling element has a coupling region coupled to a pivot shaft for rotation about the pivot axis. A preload element generates a force acting on the first coupling element and the second coupling element in a peripheral direction with respect to one another and generates a force acting in an axial direction between the coupling elements. One of the coupling elements includes two radially outwardly extending rotational coupling projections and the other coupling element includes a rotational coupling cutout receiving the projection. The one coupling element is held axially on the other coupling element by the preload element to prevent the projections from moving out of the cutouts.

A coupling arrangement is disclosed for rotationally coupling a drive element of a pivoting drive of an exhaust-gas flap for the exhaust-gas flow to a pivot shaft that is rotatable about a pivot axis. A first coupling element has a coupling region coupled to the pivot shaft for conjoint rotation about the pivot axis and a second coupling element has a coupling region coupled to the drive element for conjoint rotation about the pivot axis. A preload element acts on the first coupling element and the second coupling element substantially in a peripheral direction with respect to one another. One of the coupling elements has two rotational coupling projections which extend radially outward with respect to the coupling region of the coupling element. The other coupling element includes, so as to be assigned to each rotational coupling projection, a rotational coupling cutout which receives the corresponding rotational coupling projection.

A throttle apparatus includes a throttle body (12), a throttle valve (13), a throttle shaft (14), an electrically driven motor (15), a drive gear (23), a driven gear (24), a middle gear (25), and a sensor block (19). The middle gear (25) is held by the throttle body (12) such that a gear shaft is displaced from an imaginary straight line (V) connecting together a motor shaft and the throttle shaft (14). A gear arrangement projection part (34) that projects outward by a displacement amount of the middle gear (25) and a connector arrangement projection part (35) that projects to a same side as the gear arrangement projection part (34) at a position adjacent to a motor housing part (12b) side of the gear arrangement projection part (34) are formed on an outer surface of the throttle body (12). The motor connector (36) is arranged on the connector arrangement projection part (35) such that the motor connector (36) is in parallel with an axis center of the motor shaft and faces another end side of the throttle body (12). The sensor connector (20) is arranged on the sensor block (19) such that the sensor connector (20) is directed toward the axis center from a direction that is orthogonal to the axis center of the motor shaft.