A valve assembly includes a valve housing with a bore, a rotatable valve shaft coupled to the valve housing, a valve plate rotatable with the rotatable shaft, the valve plate being in a valve closed position at an angle greater or less than zero degrees, the valve plate including a first surface facing an inlet, a second surface facing an outlet, a first circumferential surface between the first surface and the second surface, and a second circumferential surface extending from at least one of the first surface or the second surface in a direction toward a reference axis and terminating at the first circumferential surface, the valve plate being in the valve closed position, the second circumferential surface defines a gap between the surface of the bore for avoiding contact with the surface of the bore, and the first circumferential surface and the second circumferential surface define a surface spaced therebetween to make contact with the surface of the bore that inhibits seizing of the valve plate with the surface of the bore when the valve plate is rotated by the rotatable shaft.

A valve flap device having at least one valve housing having a shaft comprising a bearing surface and a valve axis, the shaft being rotationally supported about the valve axis by means of the bearing surface in the valve housing. A bearing element having a sliding bearing surface, wherein the bearing surface of the shaft contacts the sliding bearing surface. A bearing housing provided on the valve housing, in which the bearing element is supported at least in the radial direction to the valve axis, wherein the bearing element has an outer surface contacting the bearing housing. The support of the shaft is intended to be sufficiently tightly sealed, even for gaseous media, while simultaneously ensuring precise and statically determinate support. To this end, the bearing element is designed as a separate component coupled to the bearing housing about the valve axis with respect to the circumferential direction, such that the relative position between the bearing element and the bearing housing does not change in the circumferential direction when the shaft is rotated.

A valve assembly includes a valve housing defining a bore with a first axis extending along a length of the bore, and a valve shaft partially disposed within the bore along a second axis that is perpendicular to the first axis. The valve assembly additionally includes a valve plate coupled to the valve shaft and disposed within the bore, and a restricting device including a stop member and an engagement member. The stop member extends from the valve housing and presents a stop surface. The engagement member extends from the valve shaft and presents an engagement surface. At least one of the stop surface and the engagement surface is non-parallel with the second axis. The at least one non-parallel surface engages the other of the stop member and the engagement member and biases the valve shaft axially along the second axis.

The engine shut-off valve system includes a housing, a gate member, a rotating lever, a locking piston assembly, and a closing piston assembly. The system is installed in fluid connection with a flow line so that air flow passes through a passageway in the housing with the gate member in the locked configuration. The air flow through the passageway stops with the gate member in the closed configuration. The gate member has an asymmetry so that the forces of the spring of the closing piston assembly and the spring of the locking piston assembly are cooperative to actuate between the closed configuration and the locked configuration, while wearing on the gate member differently so as to extend the working life of the valve system. The closing piston assembly and the locking piston assembly are separately accessible for maintenance.

An exhaust gas flap, especially for the exhaust gas stream of an internal combustion engine, includes a flap tube (24), a flap diaphragm (26). The flap diaphragm (26) is carried in the interior of the flap tube (24) on a pivot shaft (18), rotatable about a pivot axis (A). The flap diaphragm (26) has at least one flap diaphragm part (28, 30) and a mounting area (40) enclosing the pivot shaft (18) in at least some areas. A wing stop (42, 44) is provided at an inner circumferential area of the flap tube (24) in association with at least one flap diaphragm part (28, 30). A recess (60, 62, 64, 66) at the flap diaphragm (26), receiving a circumferential end area (48, 50) of a wing stop (42, 44), is provided in at least one axial end area of the mounting area (40).

A method of manufacturing a butterfly member of an exhaust brake valve assembly. The method includes providing a metal material, machining the metal material to form a body, and drilling a through bore in a central portion of the body, thereby delimiting a first side of the body from a second side of the body that is opposite the first side. The through bore is configured to receive a shaft for pivoting movement of the body in a valve housing of the exhaust brake valve assembly. The method further includes positioning the body for a single machining operation and machining the body to form a first sealing face on the first side of the body and a second sealing face on the second side of the body. The first sealing face defines a first plane and the second sealing face defines a second plane spaced from the first plane.

A valve assembly includes a valve housing defining a bore with a first axis extending along a length of the bore, and a valve shaft partially disposed within the bore along a second axis that is perpendicular to the first axis. The valve assembly additionally includes a valve plate coupled to the valve shaft and disposed within the bore, and a restricting device including a stop member and an engagement member. The stop member extends from the valve housing and presents a stop surface. The engagement member extends from the valve shaft and presents an engagement surface. At least one of the stop surface and the engagement surface is non-parallel with the second axis. The at least one non-parallel surface engages the other of the stop member and the engagement member and biases the valve shaft axially along the second axis.

The present invention relates to a throttle valve adapted to equip an air intake system in an internal combustion engine, in particular an explosion engine. The throttle valve comprises: a body delimiting an air intake pipe; a valve member mounted rotatably in the pipe about an axis of rotation and comprising a spherical portion shutting off the pipe in the closed configuration; means for moving the valve member in rotation about the axis of rotation between different configurations of the throttle valve; and a bearing ring which receives a spherical outer surface of the valve member in sliding bearing contact. The throttle valve is characterized in that it also comprises a seal which is elastically deformable, which is arranged between the body and the bearing ring and which is adapted to take up forces to which the valve member and the bearing ring are subjected during a back-fire through the pipe. The invention also relates to an internal combustion engine, in particular an explosion engine, comprising such a throttle valve.

A passive exhaust valve assembly includes an exhaust conduit that has a first pipe section attached in generally axial alignment with a second pipe section. The end portion of the first pipe section includes a circumferential segment disposed within the end portion of the second pipe section to form an overlapping interface. The end portions of the first and second pipe sections each include a flange protruding radially outward from the respective first or second pipe section, whereby the flanges engage with each other to form an axle seat therebetween. A support shaft extends laterally across an interior volume of the exhaust conduit and rotatably engages the axle seat. A valve plate is coupled to the support shaft within the interior volume of the exhaust conduit for moving relative to the exhaust conduit between open and closed positions.

A fresh gas supply device for an internal combustion engine having an exhaust gas turbocharger includes a charge air inlet for taking in a compressed charge air flow from the exhaust gas turbocharger; an outlet which is connected to the charge air inlet via a valve section, said valve section being closed in a closed position by at least one flap valve which can be pivoted, preferably, about a flap rotational axis; an adjusting device which is coupled to the at least one flap valve for adjusting the same in the closing direction; and a compressed air inlet for taking in compressed air into the outlet. The compressed air inlet is arranged such that the compressed air is directed into a compressed air flow in the direction of the valve section to the at least one flap valve. A corresponding method for operating the fresh gas supply device is provided.