Abstract: A check valve comprises a valve housing defining at least one valve opening, and at least one flapper pivotably mounted for rotation relative to the valve housing between an open position in which it permits fluid flow through the respective valve opening and a closed position in which it prevents fluid flow through the valve opening. The valve housing comprises a hinge body which comprising a hinge groove extending in a straight line in a longitudinal direction therethrough from a first end to a second end. The hinge groove has, in a plane transverse to the longitudinal direction, an arcuate profile. The at least one flapper comprises a hinge tongue formed along a proximal edge thereof. The hinge tongue extends in a straight line in a longitudinal direction along the proximal edge of the flapper from a first end to a second end.

Abstract: A start-up system including a control system controlling a partial opening of an air intake valve of a start-up turbine during a first phase of the start-up. The start-up turbine is capable of turning a rotor of the turbomachine for the purpose of the start-up, so as to prevent the rotor from encountering critical frequencies of the turbomachine.

Abstract: A valve assembly includes a butterfly valve rotatably moveable between a closed position and an open position, and a shaft extending from the butterfly valve and rotatable about a longitudinal axis to move the butterfly valve between the open position and the closed position. The valve assembly further includes an actuator having a body operable to maintain an end portion of the shaft, the actuator operable to cause the shaft to rotate about the longitudinal axis, a housing sized to retain a portion of the shaft, the housing operable to be in removeable contact with the body, a seal intermediate the body and the shaft, the seal having an outer sealing surface contacting the body and an inner sealing surface contacting the shaft, and an anti-rotation interface between the seal and the housing.

Abstract: A system and method for variable exhaust mixing is provided. A variable exhaust mixing device including a butterfly valve is positioned in an exhaust stream and the butterfly valve is opened more to decrease mixing and closed more to increase mixing. The increased mixing provided by the variable exhaust mixing device allows the injection of dosed fuel into the exhaust stream at a lower exhaust flow rate.

Abstract: Exemplary embodiments are directed to butterfly valves, generally including a body assembly and handle assembly. The body assembly generally includes a body, a disc rotationally disposed inside an opening of the body, a cog, and a stem passing through the disc and the body. The handle assembly generally includes a handle body and a force ring. The stem can be rotationally interlocked relative to the disc and the handle assembly. The cog and the force ring can engage to rotationally secure the disc relative to the body. The handle assembly can include a lever and a grip, the force ring, the lever and the grip being pivotally secured relative to each other. The body can include a male radial protrusion and the body assembly can include a liner with a female radial groove. Methods of assembling and positioning a butterfly valve are also provided.

Abstract: A valve is disclosed and can include a valve body having a central bore for passage of fluid there through and a longitudinal axis. The valve can also include a seal installed within the valve body along the central bore. The seal can include a first seal member having an annular ring portion and a hub portion extending from the annular ring portion. The seal can also include a second seal member including an annular ring configured to engage a distal end of the hub portion and create a sealing engagement between the hub portion and the annular ring when a compressive force is applied to the first and the second seal members.

Abstract: A shutoff valve, e.g., an engine shutoff valve, is provided which includes a valve body having a fluid, e.g., air, passage and a disc assembly. The disc assembly is pivotable within the fluid passage from an open position to provide for free flow of fluid through the passage, to a closed position to provide a substantially closed off the fluid passage. The disc assembly includes a front disc, a rear disc, and a seal, e.g., a spring energized PTFE seal, disposed between the front disc and the rear disc. The front disc is permanently secured, e.g., welded, soldered or brazed, to the rear disc such that the seal is captured between the front disc and the rear disc.

Abstract: A lightweight butterfly valve having a disk maintained in a fixed position on a compound shaft through an interlocking relation ship between each of the individual shafts of the compound shaft and the disk as the disk is moveable between an open or closed position with the butterfly valve may having other features such as an electric drive to quickly rotate the compound shaft to provide for rapid opening and closing the butterfly valve, a disk position indicator and a shaft stop to prevent the disk from being driven past a full open condition.

Abstract: A dual flap device for the environmentally tight connection of two receptacles is provided with two housing halves, which can be releasably connected. Each housing half accommodates a flap, which is pivotable by way of a half shaft. In a connected position of the dual flap device, the housing halves and the flaps rest against each other and are tensioned against one another, respectively. The half shafts of the two flaps unite to form a mutual shaft having a rotational axis. Thus, using a locking device, both flaps can be pivoted between a closed position and an open position by way of the mutual shaft. A first housing half is provided with a locking device, at least on one side, located in axial extension of the respective half shaft, which makes it possible to switch the dual flap device between an unlocked and a locked position.

Abstract: An adaptive valve assembly includes a pipe defining a passageway for conducting engine exhaust gases, a pivot shaft supported by the pipe, and a valve body coupled to the pivot shaft. The valve body is moveable between an open position where exhaust gas flow through the passageway is increased and a closed position where exhaust gas flow through the passageway is reduced. A resilient member biases the valve body toward the closed position. A retainer cooperates with the resilient member to define a valve stop for the valve body when in the closed position.

Abstract: A flow control valve in which corrosion is less likely to occur in the vicinity of a radial step portion in a gas passage of a housing and a method for manufacturing the same are provided. A flow control valve includes: a housing formed with a gas passage including a first cylinder member accommodating portion, a second cylinder member accommodating portion, and a radial step portion; a first cylinder member accommodated in the first cylinder member accommodating portion; a second cylinder member accommodated in the second cylinder member accommodating portion; and a valve body that is rotatably arranged inside the first cylinder member and the second cylinder member in the radial direction. The housing is formed of cast iron. At least surfaces of the first cylinder member and the second cylinder member are formed of a highly corrosion resistant material.

Abstract: A body for an actuated valve, the actuated valve comprising flow regulating means for regulating the flow of a fluid between an input bore and an output bore of a barrel, and actuating means for controlling a position of the flow regulating means, the body comprising: a barrel having at least the input bore and the output bore; an actuating volume inside of which at least part of the actuating means can be placed, wherein the barrel and the actuating volume are integrally formed in a single piece.

Abstract: A valve has a valve body provided on its inner peripheral surface with a seat ring, a stem arranged to extend in a direction substantially perpendicular to the axis of a flow passage defined in the valve body, and a valve element rotatably supported through a bush attached to the stem, and opens or closes the flow passage by pressing or separating the valve element against or from the seat ring in the valve body in accordance with the rotation of the valve element. The valve body is molded after the valve element, the seat ring, the stem, and the bush are placed in predetermined positions in a mold.

Abstract: A butterfly valve for controlling the flow of fluid within a bore, including a butterfly and at least one ring extending at least one of substantially and completely around a perimeter of the butterfly and adapted to develop an expansion force in the radial direction when the at least one ring is in a contracted state with respect to the radial direction, wherein the at least one ring is secured to the butterfly in the contracted state and radial expansion due to the developed expansion force of the at least one ring is effectively restrained, wherein the butterfly valve is adapted to operate, when placed in a bore, without friction or substantially without friction between the at least one ring and the bore when the butterfly valve is placed in a closed position within the bore.

Abstract: 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.

Abstract: A simplified variable orifice for a conduit furnishing a stream of particulate coal to a burner for a turbine in an electrical utility plant. Two plates are installed across the conduit, one of them being fixed and the other being variable in angular position relative to the first. A lockable mechanism is provided externally of the conduit to manually adjust the degree of blocking and to indicate the position of the movable plate.

Abstract: A flapper valve assembly and a method of making the same. The flapper valve assembly is mountable to a manifold as a unit. The flapper valve assembly can include bearings that do not require assembly on a shaft of the flapper valve. More particularly, the flapper valve can include a shaft having one or more flap portions and one or more bearing portions molded in place on the shaft as a unitary structure. The bearing portions are separated from adjacent flap portions and/or the shaft thereby forming a bearing that rotates independently of flap portions on the shaft. The flapper valve is mounted to a flapper valve carrier that can include sealing members for facilitating a tight seal between the flapper valve and the carrier and/or the carrier and a manifold.

Abstract: The present invention relates to a switching valve (1) for controlling a gas flow in a gas line of an internal combustion engine, in particular in a motor vehicle, comprising a line section (2) for installation in the gas line, an actuator drive (3) for rotational adjustment of a butterfly valve (11) about an axis of rotation (13) running across the direction of flow inside the line section (2). In the closed position of the butterfly valve (11) a throttle sealing gap (17) is formed radially between a butterfly valve edge (16) and a sealing surface (14) facing the butterfly valve (11) and belonging to a sealing section encompassing the butterfly valve (11) along the butterfly valve edge (16) in the circumferential direction. To simplify the manufacture of a high quality throttle sealing gap (17), the sealing section may be formed by a sealing body (15) which is manufactured separately from the other line section (2) and can be added directly onto the line section (2).

Abstract: A flapper valve and a method of making the same that does not require bearing assembly. More particularly, the flapper valve includes a shaft having one or more flap portions and one or more bearing portions molded in place on the shaft as a unitary structure. The bearing portions are separated from adjacent flap portions and/or the shaft thereby forming a bearing that rotates independently of flap portions on the shaft. Accordingly, the flapper valve with mold-in-place bearings does not require bearings to be separately assembled or installed prior to installation of the valve.

Abstract: The present invention is related to a method for the production of a throttle valve connection piece housing and a throttle valve as molded injection parts. The throttle valve connection piece housing is provided with a throughflow opening which can be sealed by the throttle valve. Along a pivoting axis extending perpendicular to the longitudinal axis of the throughflow opening, the throttle valve is provided with a continuous shaft hole into which a throttle valve shaft can be inserted in a rotationally fixed manner, the two ends of the shaft protruding from the shaft hole in such a way that they protrude into coaxial bearing holes in the throttle valve connector piece housing which are coaxial to the shaft hole. When the throttle valve is in a closed position, the radial peripheral edge thereof rests on the inner wall of the throughflow opening. The throttle valve connector piece housing is produced together with the closed-position throttle valve as a single injection molded piece in an injection mold.

Abstract: The present invention relates to a multi-valve damper which divides a section of an airflow duct into at least two airflow sections. The damper has a plug body having a proximal end and a distal end. The plug body is adapted to separate a section of an airflow duct into at least two airflow sections. At least two damper blades may be mounted on the distal end of the plug body, each of the damper blades controlling airflow in a respective airflow section. At least one airflow sensor may be provided in each of the airflow sections for controlling the respective damper blades. An actuator mechanism responsive to the sensors may be provided for opening and closing the damper blades. At least one of the proximal end and the distal end of the plug body may have an aerodynamic shape.

Abstract: A combustion engine carburetor has a control valve assembly that generally controls flow through a fuel-and-air mixing passage extending through a body of the carburetor. The control valve assembly has at least one valve preferably of a butterfly-type having a shaft that extends transversely across the fuel-and-air mixing passage and journaled for rotation in the body about a rotation axis. The shaft has opposite trailing and leading end portions that project from generally opposing sides of the carburetor body. Axial movement of the shaft with respect to the body is limited by an axial retention feature that preferably has a radially enlarged end cap formed unitarily to the trailing end portion and a coupler snap fitted to the leading end portion.

Abstract: A reduced component wear valve is comprised of a valve body having a passage therethrough and a disc attached to a rotatable shaft. The disc is utilized with a seal forming a gap between the disc and the seal proximate to the rotational axis of the disc. When the disc is in the open position, the seal major axis is greater then the disc diameter and they do not touch. As the disc rotates to near closure, the disc perimeter engages the minor axis of the seal (which is smaller than the disc diameter), and the disc stretches the seal in the minor axis direction thus decreasing the major axis such that the gap is closed. The seal can be pre-formed in an elliptical shape or it can be formed into an elliptical shape by a retaining mechanism. The seal may be a single-piece or a multi-piece assembly press-fit into the valve body. Zero or light disc to seal contact during the majority of the valve disc rotation minimizes valve seal wear and rotational friction.

Abstract: A method for the production of a butterfly valve which comprises a valve body housing a valve seat engaged by a butterfly disc keyed on a shaft in order to rotate under the action of an electric motor, the shaft being coupled to an inductive position sensor of the “contact-free” type provided with a rotor which is rigid with the shaft and is housed in a chamber of the valve body, and a stator which is borne by a detachable cover adapted to close the chamber and is disposed, in operation, facing the rotor, the method comprising the coupling of the rotor to the shaft, the mounting of the stator on the cover, the completion of any remaining machining operations on the butterfly valve, the coupling of the cover to the valve body in order to close the chamber in a substantially permanent manner, and the calibration of the position sensor by disposing the shaft in a sequence of predetermined positions.

Abstract: An assembly comprises a valve, a valve seal, and a piece of epoxy. The valve comprises a valve gate, a housing, and a plurality of screws. The housing comprises a fluid passageway and a groove that extends into the housing from the fluid passageway. Each of the screws extends into the groove of the housing. The valve gate is movable relative to the housing between an opened and closed position. The valve seal is positioned at least partially within the groove. The piece of epoxy surrounds at least a portion of each of the screws and has a geometry that is interlocked with the valve seal and with each of the screws in a manner securing the valve seal to each of the screws and in a manner such that the valve seal is positioned to compress against the valve gate when the valve gate is in the closed position.

Abstract: A vane-type throttle valve assembly including a body having a passage therethrough and a pivotable shaft transverse of the passage and supporting a vane for variably restricting the flow of material through the passage. The shaft is disposed in opposing bores in the valve body. Each bore includes an access slot. The valve is assembled by inserting an integrated shaft and vane into the passage, engaging the ends of the shaft into the access slots, and translating the shaft ends in the access slots until the ends of the shaft are positioned in the bores. The shaft is retained in the bores by bushings inserted from outside the valve body. In a currently preferred embodiment, the access slots are formed over an angle from an axis of the bores, and the shaft ends are entered into the bores by rotating the shaft and vane about the passage axis.

Abstract: The present invention relates to a multi-valve damper which divides a section of an airflow duct into at least two airflow sections. The damper has a plug body having a proximal end and a distal end. The plug body is adapted to separate a section of an airflow duct into at least two airflow sections. At least two damper blades may be mounted on the distal end of the plug body, each of the damper blades controlling airflow in a respective airflow section. At least one airflow sensor may be provided in each of the airflow sections for controlling the respective damper blades. An actuator mechanism responsive to the sensors may be provided for opening and closing the damper blades.

Abstract: A throttle plate assembly with a wedge for limiting air flow upon initial acceleration.

Abstract: The present invention relates to a throttle valve arrangement for closing a through flow in a throttle valve connection piece, including a pivotably actuated throttle valve shaft which is mounted in the opening in a perpendicular position with respect to the longitudinal extension thereof projecting into the housing of the throttle valve connection piece with the free end thereof. The through flow opening can be closed by a throttle valve which is firmly connected to the throttle valve shaft. The throttle valve comprises a continuous receiving opening extending on the plane thereof in a perpendicular position with respect to the opening and through which the throttle valve shaft is guided. Additionally, a recess is formed in the throttle valve, extending form the through opening to the receiving opening in the area where the throttle valve is connected to the throttle valve shaft by means of a welded connection.

Abstract: A method and apparatus is provided for the attachment of a throttle shaft to a throttle body. A throttle shaft, a spring, and a cap retainer, are temporarily assembled as a throttle shaft subassembly. A set of locking members extend from the cap retainer to engage a set of locking surfaces adjacent the throttle shaft to retain the spring in tension. The cap retainer fits onto a boss extending from the throttle body and is lockable thereto by a set of fingers which are received into engagement recesses located on the boss. As the shaft subassembly is guided into the throttle body, the cap retainer is rotated by the engagement surfaces and the locking members are disengaged from the locking surfaces to at least partially unload the spring to mount the shaft.

Abstract: The invention relates to a method for producing a throttle valve unit for installation into a flow conduit through which a gas flow passes. A flap shaft of the throttle valve unit is affixed to a stamped insert part inside a fastening region. The stamped insert part, which includes an insert border, is molded into a housing. At the same time as the stamped insert part is molded into the housing, the flap shaft affixed to the stamped insert part is molded-in inside the fastening region. A planar region of the stamped insert part connected to the flap shaft is cut out from this stamped insert part.

Abstract: An assembly consists of a housing and a flap unit. The housing and the flap unit are each one-piece injection-molded parts and the flap unit is mounted in the housing. The flap unit has at least two flap elements and a connection section arranged between each two flap elements. The connection section has a compensation element that can compensate for shrinkage-related length changes, in particular of the connection section.

Abstract: The present invention relates to a method for producing a housing of a valve connection piece and to a valve connection piece. The housing includes a throughflow opening wherein a valve is pivotably arranged around a pivoting axis extending in a perpendicular position with respect to the longitudinal extension of the throughflow opening. When in a closed position, the valve rests with the radially peripheral edge thereof in a beginning area of the valve on the inner wall of the throughflow opening. The beginning area of the valve extends from the resting area of the butterfly valve on the inner wall of the throughflow opening in the direction which the valve flap opens and has a circular cross section which is offset along the pivoted longitudinal axis of the throughflow opening. The inflow and outflow areas which are adjacent to the beginning area of the valve on the inflow and outflow side spread outwards in a conical manner.

Abstract: The present invention is related to a valve assembly and a method of manufacturing same. An extruded profile is used as a housing of the valve assembly, within said housing a single-component valve-element is injection-moulded, having a shaft-part and a plate-part, by moulding said single-component valve-element within a central bore against said housing during injection-moulding. Curing of the single-component valve-element and contracting thereof is allowed, providing for a clearance between the single-component valve-element and components of said housing for relative movement therebetween.

Abstract: The present invention is related to a method for the production of a throttle valve connection piece housing and a throttle valve as molded injection parts. The throttle valve connection piece housing is provided with a throughflow opening which can be sealed by the throttle valve. Along a pivoting axis extending perpendicular to the longitudinal axis of the throughflow opening, the throttle valve is provided with a continuous shaft hole into which a throttle valve shaft can be inserted in a rotationally fixed manner, the two ends of the shaft protruding from the shaft hole in such a way that they protrude into coaxial bearing holes in the throttle valve connector piece housing which are coaxial to the shaft hole. When the throttle valve is in a closed position, the radial peripheral edge thereof rests on the inner wall of the throughflow opening. The throttle valve connector piece housing is produced together with the closed-position throttle valve as a single injection molded piece in an injection mold.

Abstract: The present invention relates to a method for producing a housing of a valve connection piece and to a valve connection piece. The housing includes a throughflow opening wherein a valve is pivotably arranged around a pivoting axis extending in a perpendicular position with respect to the longitudinal extension of the throughflow opening. When in a closed position, the valve rests with the radially peripheral edge thereof in a beginning area of the valve on the inner wall of the throughflow opening. The beginning area of the valve extends from the resting area of the butterfly valve on the inner wall of the throughflow opening in the direction which the valve flap opens and has a circular cross section which is offset along the pivoted longitudinal axis of the throughflow opening. The inflow and outflow areas which are adjacent to the beginning area of the valve on the inflow and outflow side spread outwards in a conical manner.

Abstract: A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, that is closely received within a glass cylinder. The glass cylinder has a fitting that closes one end of the cylinder and is connectable to a pneumatic control system. A drive rod is connected between the piston and the damper vane to move the damper vane between an open position and a closed position.

Abstract: The invention relates to a method for producing a throttle valve unit for installation into a flow conduit through which a gas flow passes. A flap shaft of the throttle valve unit is affixed to a stamped insert part inside a fastening region. The stamped insert part, which includes an insert border, is molded into a housing. At the same time as the stamped insert part is molded into the housing, the flap shaft affixed to the stamped insert part is molded-in inside the fastening region. A planar region of the stamped insert part connected to the flap shaft is cut out from this stamped insert part.

Abstract: An air turbine starter valve able to open despite being frozen shut. Dual actuators apply sufficient torque upon an air turbine starter valve to overcome obstructions presented by frozen moisture. By applying separate and generally-aligned torques, the actuators are able to provide sufficient force to overcome the adhesion provided by frozen moisture between the valve plate and adjacent structures.

Abstract: A control valve assembly comprising at least two control valves which may be used, for example, to throttle the air intake of an internal combustion engine. The assembly is provided with a centrally arranged, force-transmitting shaft (32). The control valves are formed by blades (15) in frames (16) produced by an assembly injection molding process. The control valve blades (15) can be molded onto the force-transmitting shaft (32). The resulting assembly can be mounted or installed as a unit. Alternatively, instead of using a single continuous shaft, shaft projections can be injection molded on the valve blades, which terminate in lugs which engage in a rotationally secure manner in sockets in an adjacent valve assembly so that the two assemblies rotate together as a unit. The resulting control valve assembly is easy to install and advantageously takes up only a little space.

Abstract: A control valve including a plastic injection-molded wing body and a shaft having embossed projections thereon, said shaft being positively connected to said wing body, wherein the wing body has, in the direction of an axis perpendicular to the axis of rotation of the shaft, a maximum dimension no greater than the diameter of the shaft, said shaft having the plastic of the wing body injected-molded completely around said shaft in the region of the projections. The control valve may, according to one embodiment, be adapted for use as an intake device for an internal combustion engine, and for use, e.g., as a resonant valve or a throttle valve.

Abstract: A control valve assembly comprising at least two control valves which may be used, for example, to throttle the air intake of an internal combustion engine. The assembly is provided with a centrally arranged, force-transmitting shaft (32). The control valves are formed by blades (15) in frames (16) produced by an assembly injection molding process. The control valve blades (15) can be molded onto the force-transmitting shaft (32). The resulting assembly can be mounted or installed as a unit. Alternatively, instead of using a single continuous shaft, shaft projections can be injection molded on the valve blades, which terminate in lugs which engage in a rotationally secure manner in sockets in an adjacent valve assembly so that the two assemblies rotate together as a unit. The resulting control valve assembly is easy to install and advantageously takes up only a little space.

Abstract: A throttle valve assembly for a deposition chamber or the like is disclosed. The throttle valve assembly comprises a shaft including a first portion and second portion. At least one throttle vane or plate is coupled to the first portion of the shaft and a valve gear is coupled to the second portion of the shaft. A positioning element is provided to couple the valve gear to the shaft in only one rotational orientation.

Abstract: A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, that is closely received within a glass cylinder. The glass cylinder has a fitting that closes one end of the cylinder and is connectable to a pneumatic control system. A drive rod is connected between the piston and the damper vane to move the damper vane between an open position and a closed position.

Abstract: A damper attaching structure which enables a damper provided with a thin rotational shaft to be assembled inside a casing or the like by employing an opening formed in the casing, is obtained by providing a concave groove which is formed in the inner surface of wall member and which is continuous from a casing opening; a positioning plate provided at the base of a damper thin shaft on the damper side thereof; a shaft hole which opens at the concave groove and which is larger than the cross section of the damper thin shaft; and a shaft fixing member which is provided on a lever, and which has an engaging hole into which the damper thin shaft is inserted and which engages the damper thin shaft member to enable torque transmission, and rotatably inserted into the shaft hole.

Abstract: A throttle assembly including a bore wall to which a seal member is previously attached is inserted into a key-like slot of an intake air passage body, and flanges are fixed to each other by screws. A bore inner wall of the bore wall is placed to correspond to an inner wall of an intake air passage, and the seal member completely seals between the intake air passage body and the throttle assembly. That is, the throttle assembly including the seal member is inserted into the key-like slot, so that the throttle assembly is easily attached to the intake air passage body, a sealing mechanism therebetween is simplified, and a stress strain of the bore wall is prevented.

Abstract: A valve assembly including a body defining a passageway having a longitudinal axis, a rotatable shaft extending into the passageway, generally perpendicular to the axis of the passageway, and a flapper secured to the shaft within the passageway and movable upon rotation of the shaft between an opened position and a closed position. The flapper includes a groove in an outer circumference, and a seal is received in the groove. The seal has an outer circumference greater than the outer circumference of the flapper so the entire outer circumference of the seal contacts a wall of the passageway when the flapper is moved to the closed position. The seal also has an inner circumference greater than an inner circumference of the groove of the flapper such that an enclosed space is defined between the seal and the groove. An aperture provides fluid communication between the enclosed space and the passageway.

Abstract: A throttle body (12) has a bore (14) through which intake flow passes. A throttle blade (18) is disposed within the bore to selectively restrict the flow. The blade has through-holes (62) extending between its opposite faces (24, 26). A wedge (28) has a body (30) with opposite nonparallel faces (32, 34), one of which is disposed against one face of the blade. Self-attachment features (48) extend from the one face of the wedge body through respective through-holes in the blade. Barbs (52) at the free ends of the self-attachment features catch the opposite face of the blade.

Abstract: A throttle valve control device provided with a throttle valve 3 formed in an elliptic shape such that a major axis is a center line 3c connecting mounting holes 3a and 3b for fixing the valve 3 to a throttle shaft 2. A clearance A is provided between an edge of the elliptic valve 3 in a minor axis and an inner wall of a throttle bore 1b configuring an intake passage, while the minimum open area needed for idle engine operation is provided. Even if deposits are accumulated in the bore 1b in the vicinity of the throttle shaft 2 at the idle operation, the throttle valve 3 further rotated in a reverse rotating direction at throttle valve non-control time can scrape off the deposits at a smaller rotational torque as compared with in the vicinity of the edge 3d of the valve 3.

Abstract: The invention relates to a method for producing a housing (12) for a throttle valve connection piece (10), which housing is to have particularly high dimensional stability. For this purpose, the housing (12), which has a throttle orifice (16) for a throttle valve (20), is produced from plastic (14) by the injection molding method, plastic (14) being partially injected around a metal cylinder (28) which, at least in the region of the throttle valve (20), forms the throttle orifice (16). In this case, before the injection molding method, an expanding mandrel (50) is expanded against the inner face (33) of the metal cylinder (28). During the injection molding method, the inner face (33) of the metal cylinder (28) is supported at least partially by the expanding mandrel (50). After the injection molding method, a reduction in the outer circumference (80) of the expanding mandrel (50) is carried out in order to remove the expanding mandrel (50) from the interior (70) of the metal cylinder (28).