Abstract: An intake system for an internal combustion engine having at least two cylinder bank rows, each being assigned an intake bend having individual tubes leading to the cylinders, where the intake bends are interconnected in terms of fluid flow via a distributor tube (38) and at least one resonance tube (30) equipped with a switch valve, where the resonance tube and the distributor tube are combined in a central intake module.

Abstract: An internal combustion engine intake device is provided for an internal combustion engine such that intake device that can reduce the vibration of the throttle chamber of an internal combustion engine. The intake device has an intake air collector, a vacuum tank and a first air induction pipe. The vacuum tank is arranged closely adjacent to the intake air collector. The first air induction pipe extends upstream from the intake air collector in such a manner as to be closely adjacent to the vacuum tank. Preferably, the first air induction pipe is integral with the intake air collector and the vacuum tank.

Abstract: A butterfly valve of a swirl system for an internal combustion engine; the butterfly valve displays: a shaft which is rotationally mounted within an intake channel to rotate about a rotation axis; and a butterfly valve plate which is rigidly connected to the shaft and is provided with a seat, which is coaxially arranged with respect to the shaft and accommodates the shaft within itself.

Abstract: A vehicle, such as a motorcycle, that includes an engine air intake arrangement with a variable length intake passage. The motorcycle includes an engine having an intake port. A fixed funnel delivers air to the intake port of the engine. A moveable funnel is positioned on the intake side of the fixed funnel and selectively cooperates with the fixed funnel to deliver air to the intake port of the engine. A parallel linkage moveably supports the moveable funnel relative to the fixed funnel. An air cleaner box, in which the fixed funnel and the moveable funnel are disposed, includes a protrusion at a portion that covers the moveable funnel and that prevents the occurrence of contact with the moveable funnel.

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: An intake manifold for an internal combustion engine having a number of cylinders; for each cylinder, the intake manifold has a respective intake pipe connecting the intake manifold to the cylinder and regulated by an intake valve; and the intake manifold also has an air vessel having, for each intake pipe, a respective hollow body defining an empty chamber, which communicates with the intake pipe by means of a high-speed compensation valve.

Abstract: An expandable manifold comprises an expansion chamber defined by a resilient surface. Intake is provided by a conduit extending into the chamber. As reverse impulses resulting from the closing of an intake valve enter the expansion chamber from the output end of the chamber, the volume of the chamber increases as the resilient surface expands. The reverse impulses propagate along the inner surface of the resilient surface toward a void defined by the outer surface of the conduct and the inner surface of the resilient surface. When the intake valve reopens, the reverse impulse flow is redirected and combined with intake flow from the source of fuel/air. The reverse impulses are redirected within and proximate the void. Energy associated with the reverse flow is redirected and combined with the forward flow to improve overall engine performance.

Abstract: A raised portion is formed at a predetermined location on an inside surface of a wall portion of an intake manifold. A gas introduction hole for introducing gas containing water vapor is formed in another predetermined location, other than in the raised portion, in the inside surface of the wall portion. An intake air negative pressure outlet hole for releasing intake air negative pressure within the surge tank to the outside is formed in the raised portion. A guide groove which catches moisture that trickles down the inside surface of the wall portion above the raised portion and guides it to a location away from the intake air negative pressure outlet hole, is formed in a region above the intake air negative pressure outlet hole in a rising surface of the raised portion.

Abstract: A sound increase apparatus includes a first hollow body member that communicates with an intake flow path of an internal combustion engine, a second hollow body member that communicates with the first hollow body member, and a vibration member capable of vibrating in an out-of-plane direction, which is inserted in a connection between the first and second hollow body members and closes a cross section of the connection. The second hollow body member has a plurality of opening portions, each of which communicates with the air.

Abstract: An intake system of an internal combustion engine includes a surge tank communicating with cylinders of the engine via individual intake paths, a vacuum tank connected to the surge tank, a valve that permits or inhibits communication between the surge tank and the vacuum tank, and a control unit that controls opening and closing of the valve. The control unit executes the steps of: (a) opening the valve to communicate the surge tank with the vacuum tank when the surge tank is held in a negative-pressure condition during operation of the engine, and closing the valve upon a lapse of a predetermined period of time so as to hold the vacuum tank in a negative-pressure condition, (b) opening the valve for a predetermined period of time when a condition for starting the engine is satisfied, so as to reduce the pressure in the surge tank, and (c) closing the valve when the engine is started.

Abstract: An intake device has an intake manifold, valve units each having a valve housing and a valve member, a shaft and deformed members. The intake manifold defines passages through which a fluid flows. Each of the valve units is disposed in a corresponding one of the passages of the intake manifold such that a passage of the valve unit is in communication with the passage of the intake manifold. The shaft passes through the intake manifold and the valve units, and rotatably supports the valve members. Further, each of the deformed members is disposed between the valve housing and the intake manifold and deformed therebetween.

Abstract: An abnormality determination apparatus and method for a blow-by gas feedback device, and an engine control unit are provided for improving the accuracy of abnormality determination even when an intake air amount controller is provided in an intake system at a location downstream of a joint of a blow-by gas passage. The blow-by gas feedback device feeds a blow-by gas back to an intake system of an internal combustion engine through a blow-by gas passage connected to the intake system through a joint.

Abstract: A charge motion control valve actuator method and apparatus that utilizes a motor, output shaft, control circuit, and sensor to provide closed loop control of the position of the output shaft via the motor. The control circuit has an input for receiving actuator commands and has an output connected to the motor to control operation of the motor. The sensor is connected to the control circuit and provides the control circuit with data indicative of the position of the output shaft. The output shaft is connected to the motor via a gear set and coil spring. Feedback from the sensor enables the control circuit to control the position of the output shaft, and the control circuit can also output data relating to the position of the output shaft.

Abstract: The invention relates to an internal combustion engine comprising a manifold, from which an induction pipe leads to an intake of a cylinder of the internal combustion engine. A gas intake valve is located at the intake of the cylinder. A pulse charging valve is positioned upstream of the gas intake valve in the induction pipe, the latter being released or sealed depending on the selected position of the pulse charging valve. The internal combustion engine is also provided with a pressure sensor, which is located in the induction tract and detects an induction pipe pressure. The progression of the detected induction pipe pressure is compared to that of a reference induction pipe pressure, which characterizes a predetermined operating state of the pulse charging valve. A malfunction of the pulse charging valve is detected depending on said comparison, thus guaranteeing a reliable monitoring of the pulse charging valve.

Abstract: A switching drum seal (1) for a switching drum (11) for sealing an intake pipe in an intake manifold system of a multi-cylinder internal combustion engine, having two spaced-apart, circumferentially extending circumferential sealing sections (2) with circumferential sealing surfaces (3) and two spaced-apart, axially extending axial sealing sections (4) with axial sealing surfaces (5) and having at least one resilient element (7) to impart resilience to at least one circumferential sealing section (2) perpendicular to its circumferential sealing surface. The resilient element (7) extends in a region between the switching drum (11) and one of the circumferential sections (2) and is supported on the switching drum (11).

Abstract: A V-type engine air intake device is provided for a V-type internal combustion engine. The V-type engine air intake device has a volume chamber, a first intake pipe, a second intake pipe and a plurality of curved branch pipes. The first intake pipe has a first outlet end connected to a first intake opening of the volume chamber. The second intake pipe has a second outlet end connected to a second intake opening of the volume chamber. The first and second outlet ends are arranged with first and second center outlet axes where that the first and second intake pipes connect to the volume chamber. The second center outlet axis is non-coincident with the first center outlet axis. The branch pipes each has an inlet end that opens inside the volume chamber in a substantially vertical downward direction.

Abstract: An air cleaner chamber is configured such that a filtering member is held between an air cleaner cover and an air cleaner case. A low-speed operation air intake passage and a high-speed operation air intake passage share an outlet passage portion near a dusty space, and are molded integrally on the air cleaner case using a synthetic resin. A passage switching valve is disposed so as to switch an aperture area of the high-speed operation air intake passage. In addition, a valve actuator for driving the passage switching valve is mounted to the air cleaner case.

Abstract: This invention describes an improved intake tube for internal combustion vehicles by locally increasing and then decreasing the airflow over the Mass Airflow Sensor (MAS) preventing a lean condition, which over time is catastrophic to the life of the engine. The intake tube has a cross sectional area that decreases in proximity to the MAS, causing the increase in airflow velocity of the intake air.

Abstract: An airflow diverter and replacement air intake plenum is disclosed that provides an increase in the air speed and airflow within the intake plenum of an automobile. The increase is the result of providing appropriately sized and shaped apparatus to smooth out the airflow within the plenum and eliminate turbulence that increase pressure within the plenum and cause a restriction of air movement. The diverter is configured in a triangular shape to divert the air from a single input port into two output ports. The apparatus is ideally configured for use in a Porsche, but can be configured for other automobiles and engines.

Abstract: A variable intake passage is made of a tubular space that is formed with a fixed member and a movable member arranged to face the fixed member and having a relative position with the fixed member changed. The movable member is moved to increase or decrease a distance of an air introducing portion from the combustion chamber to thereby change a passage length. The variable intake passage has a cross section that gradually increases from an upstream side to a downstream side in the air introducing direction. When the passage length of the variable intake passage is changed, the cross section of the air introducing portion of the variable intake passage is changed correspondingly.

Abstract: The object of the invention is to customize the properties of the drive assembly of motor vehicles comprising an intake system, an exhaust system, and/or an internal combustion engine. For this purpose, the mechanical properties of a serial drive assembly, the engine parameters efficiency and rotational torque, and the acoustics of the serial intake and/or exhaust system are stored in a database in an initial step. Furthermore, the construction features of the serial drive assembly that can be customized are stored in the database with their variation parameters and limitations. After varying at least one construction feature, the modifications of the engine parameters resulting therefrom are calculated and stored as a parameter difference. Likewise, the resulting changes of the acoustic features are calculated and stored as sound difference. Thereafter, the original values of the serial drive assembly are overwritten with the difference values and reproduced acoustically.

Abstract: The purpose of the intake system, which is disposed in a limited space above the engine, is to improve engine performance by preventing increase in both temperature and resistance of intake air, and also to reduce noise of the intake air. In the intake system, a rear wall extending downwardly is formed in a lower half body that is joined to a rear end of an engine cover, and a mounting frame section for attaching an element is formed in a rear wall section. An upstream-side casing is formed forward of the rear wall section. An intake duct has a downstream end connected to a front surface of the upstream-side casing adjacent to a transmission. Further, the intake duct extends widthwise of the vehicle and has an upstream end opened to the side edge of the engine cover adjacent to the transmission. A resonance chamber casing is joined to the side departing from the transmission through a communication pipe forward of the upstream-side casing.

Abstract: A muffler which reduces noises of a wide frequency band with a simple structure. Sound waves of an intake duct enter into and are received in a resonance box via a branch pipe. At the branch pipe, a movable body slidingly abuts a peripheral portion of an opening of a cut-out portion. Due to the movable body rotating, a range of opening/closing of the cut-out portion is changed, and a length of a neck portion formed by the branch pipe and an arc-shaped plate, and a lateral cross-sectional surface area of a distal end of the neck portion, are changed.

Abstract: A switchable air intake system for a multicylinder internal combustion engine has at least one short and one long intake manifold whose cross sections are controllable by at least one regulating unit as a function of operating parameters (in particular the rotational speed of the internal combustion engine). The short intake manifold for a first cylinder bank row and the long intake manifold for a second cylinder bank row of the internal combustion engine, are controllable via a joint regulating unit (56, 58).

Abstract: An intake system of a V-engine provided with a surge tank arranged at a position higher than a cylinder head of the V-engine when attached to the V-engine and divided in internal space into a top part and a bottom part and a plurality of intake tubes communicating the surge tank and intake ports of the V-engine, wherein intake tubes communicated with one cylinder bank of the V-engine are connected to the top part of the surge tank and intake tubes communicated with the other cylinder bank are connected to the bottom part of the surge tank and the surge tank is formed so that a front end of the top part is positioned further toward a rear side of the vehicle compared with the front end of the bottom part when the intake system is mounted to a V-engine mounted in the vehicle, whereby the height of the engine hood can be effectively lowered.

Abstract: In a variable air induction apparatus, a valve element is switched between one side to open a first air intake passage and close a second air intake passage, and the other side to open the second air intake passage and to close the first air intake passage. The first air intake passage and the second air intake passage have lengths different from each other. The valve element is fixed on a shaft member to rotate integrally with the shaft. A driving device applies a driving force to rotate the shaft member. An urging device urges the shaft member to rotate the valve element to be switched to any one of the one side and the other side.

Abstract: An air intake control system includes valve elements disposed in intake passages for varying the cross-sectional area of each intake passage, a valve shaft for transmitting a driving force to the valve element, an actuator including a motor for producing the driving force for turning valve shaft, a worm gear mounted on a rotary shaft of the motor, and a housing accommodating the motor and the worm gear, and a driving gear which meshes with the worm gear to transmit the driving force supplied from the actuator to the valve shaft. The driving gear includes a boss portion, a tooth portion which meshes with the worm gear, and an elastic member which is sandwiched between and bonded to the boss portion and the tooth portion. The boss portion rotates together with the valve shaft, whereas the tooth portion and the elastic member can rotate relative to the valve shaft.

Abstract: Flap bearing mountings of the present invention are for mounting flap devices (5), such as switch-over, tumble, or swirl flap devices, on a housing (2) of an air intake port system (1) of a combustion engine. Mounting of flap devices (5) is accomplished by thermoforming projections (19) that are formed on bearing elements (10) of the flap device (5) and that extend through corresponding apertures (20) formed in the housing (2) of the air intake port system (1) of a combustion engine. This structure makes it possible to cost-effectively and precisely mount one-piece flap shafts (6, 7) in all air intake port systems (1), without having to use additional mounting elements. Through the exact, precise fixing of the mounted position, deformation of the shaft (6, 7), having flap bodies (8) arranged thereon, is reliably prevented and the service life of the entire flap device (5) is prolonged.

Abstract: An impulse turbocharger for an internal combustion engine. The impulse turbocharger is adapted to be used for controlling the air flow of an air supply conduit on the intake side of an internal combustion engine. The impulse turbocharger has a rotary valve which is connected by an elastic coupling to a rotary actuator.

Abstract: In a branch pipe of an intake manifold, portion c in the central part is kept at relatively small constant inner diameter for an interval C, and portion e of which an end is connected to the surge tank is kept at relatively large constant inner diameter for an interval E, whereby the volumetric efficiency at the time of medium speed and high speed of engine is excellent.

Abstract: A method for arranging a valve element in an additional control valve device includes provides that, after a first position has been set, a valve plate is pushed onto the stem until the valve plate contacts the stop of a trapping magnet. The valve plate is then connected to the stem. This ensures that the fabrication tolerances are completely compensated by virtue of the first valve spring and the guiding of the valve element. After the second counter bearing has been secured in the guide, the holding of the first counter bearing in the previously determined first position is cancelled, which is then generally carried out by removing the tappet from the guide. After this has been done, the valve element automatically assumes a central position between the gantry magnet and the trapping magnet in the currentless state of the additional control valve device owing to the spring forces which then act.

Abstract: In an air intake system, a rear tower having an interior space is provided on the top surface of a body frame. A rear pillar having an interior passageway is mounted on the rear tower. An air intake port communicating with the passageway is provided in the rear pillar, and the passageway and the space within the rear tower are connected together. An expansion silencer is connected to the space of the rear tower and an air cleaner is connected to the expansion silencer. The top surface of a working oil tank is lower than the upper end of a side plate to form a space above the top surface, where the expansion silencer is provided. A base bracket is mounted to the air cleaner, a support bracket is mounted on the side plate, and the base bracket is mounted on the support bracket to support the air cleaner above the expansion silencer.

Abstract: An airflow treatment and regulation device for internal combustion engines that stabilizes inlet airflow characteristics before induction into a fuel metering and mixing device. The air stabilization device provides a non-restrictive honeycomb treatment element through which inlet combustion air must pass before entering the carburetor. The honeycomb element eliminates air turbulence and creates a co-adhesive straight line co-planar inlet airflow.

Abstract: An integrated engine compartment component for housing vehicle support system components in a vehicle engine compartment, which is divided by shared partition walls into a plurality of vehicle support system component-containing sections, each either forming or containing a component of a vehicle support system. In one embodiment, the integrated engine compartment component includes an air intake system filtration section containing a filter element, an air intake acoustic resonator section in two-way communication with an outlet of the air filtration section, and a washer fluid reservoir section feeding a windshield or headlight washer nozzle. An acoustic chamber may be integrated into the component outer surface, e.g., to use vehicle fluids stored therein to dampen noise and to provide additional fluid working volume.

Abstract: A noise attenuation device for a vehicle exhaust system is provided. The device includes an exhaust pipe having a passageway for receiving exhaust gas pulses from an engine. The device further includes a plurality of vanes extending from an inner surface of the passageway and spaced apart from one another. The vanes are configured to reduce turbulence in the exhaust gas pulses flowing past the vanes to reduce noise at a downstream outlet of the exhaust pipe.

Abstract: Unit for supplying combustion air to the cylinders of an endothermic engine is provided with a manifold having an air inlet orifice and a plurality of supply ducts. Each supply duct extends between a first opening communicating with the manifold and an outlet orifice, and has a second opening arranged between the first opening and the outlet orifice. The supply unit is equipped with a valve member that can move between the first opening and the second opening in order to close alternately the first opening and the second opening.

Abstract: An air induction system for inducting air into an engine of an automobile is disclosed. The air induction system has an air cleaner and an air inlet tube. The air cleaner is in fluid communication with the engine of the automobile for filtering intake air inducted into the engine. The air inlet tube is made of a first material and is connected at a first end to the air cleaner and open to ambient air at a second end. The inlet tube has a flexible portion that flexes as a result of internal pressure pulsations during the air induction event. The flexing reduces or eliminates acoustic standing waves that have significant pressure fluctuations at the same location in the air induction system as the flexible portion.

Abstract: An actuator for an intake manifold tuning valve to regulate airflow in an intake manifold of an internal combustion engine. The actuator includes a motor, control circuit, and sensor all mounted in a housing that has an opening through which an output shaft extends. The output shaft carries a valve blade that is positioned within the intake manifold when the actuator is assembled in place. The sensor provides the control circuit with feedback data indicating the position of the valve blade and this data permits the actuator itself to provide closed loop control of the position of the valve blade using an actuator command received from the engine's electronic control unit. The housing includes a stop member that engages the valve blade at a certain rotational position to thereby enable diagnostic checks of the valve to determine if the blade is present and functioning.

Abstract: A noise attenuation device for a vehicle exhaust system is provided. The device includes an exhaust pipe having a passageway for receiving exhaust gas pulses from an engine. The device further includes a plurality of vanes extending from an inner surface of the passageway and spaced apart from one another and disposed upstream of a discontinuity in the exhaust pipe. The vanes reduce turbulence in the exhaust gas pulses flowing past the vanes to reduce noise at the exhaust pipe discontinuity.

Abstract: An air supply unit for an internal combustion engine; the air supply unit is provided a number of butterfly valves and a distributor device, the latter being provided, for each butterfly valve, with a distribution duct capable of placing an internal duct of said butterfly valve in communication with a chamber of the distributor device connected to an intake box by means of a first air duct regulated by a solenoid valve; inside the distributor device, each distribution duct is connected to the intake box by means of a corresponding second air duct regulated by a respective bypass screw and is connected to a corresponding regulation duct opening into an air intake, which is accessible from the outside of the distributor device and is normally closed by an associated removable plug.

Abstract: In a muffler device of a motor vehicle, with a plurality of mufflers and an actuator for changing the flow resistance to the exhaust gases flowing through the mufflers, in order to change the damping characteristic, the actuator is provided in a pipe branch having an inlet and two outlets, each outlet being connected via a pipe to a muffler, and the throughflow cross section of the inlet being variable by means of the actuator.

Abstract: An internal combustion engine has an intake device (1), the intake pipes (5 to 8) for the intakes of cylinders of the internal combustion engine and actuators for adjusting the effective pipe lengths of the intake pipes (5 to 8) by closing or opening at least one opening of the intake pipes (5 to 8) up to a hollow body and at least one actuator for controlling the actuators. Within a first speed range whose upper limit is a first threshold value (N1), the actuators are moved into a closed position. For a speed (N), exceeding a first threshold value (N1) and being less than a second threshold value (N2), the actuators are moved into a leakage position. For a speed exceeding the second threshold value (N2), the actuators are moved into an open position.

Abstract: Prior art air charge systems for ‘V’ configuration internal combustion engines use two turbochargers and two intercoolers, one for each bank of cylinders, and require relatively long and complex air ducts. The present invention provides a charge air system for a ‘V’ engine with two banks of cylinders. The system includes a compressor connected by a charge air conduit to a charge air cooler and a flow control valve in communication with first and second branch conduits, each adapted for connection to a bank of cylinders. A branch connector has one inlet in communication with the valve and two outlets in communication with the two branch conduits. The charge air conduit may be disposed in the ‘V’ between the two banks of cylinders. The system uses one compressor and one cooler, thereby reducing component and assembly costs for the engine and keeping air ducting relatively simple.

Abstract: The present invention relates to a high-speed controlling device, suitable for displacing a switching element between two positions with very short switching times. Said device comprises two switchable electromagnets, between which an armature, with a driven coupling to the switching element, is arranged. According to the invention, said armature contacts the first electromagnet in the first position of the switching element and contacts the other electromagnet in the second position of the switching element. In order to obtain particularly short switching times for the switching element, the armature can be firmly secured to a shaft, which is rotatably mounted about its longitudinal axis and to which said switching element is also fixed in an axially offset manner in relation to the armature.

Abstract: A V-type multiple cylinder air intake is being configured to improve the volumetric efficiency by utilizing the resonance effect while also eliminating the adverse influence of the resonance effect (residual resonance) when the engine is operating in regions of medium to high rotational speeds. The V-type multiple-cylinder air intake device has two collectors with one arranged on each bank of the V-type multiple-cylinder engine; a plurality of branch pipes extending from the collectors to a respective intake port of an opposite bank; and a plurality of crossover passages extending from the collectors to a respective branch pipes extending from the collector of the opposite bank.

Abstract: A servo-operated rotary vane valve is intended for external assembly through an opening in an engine inlet manifold passage with an integral rib formed therein. Baffling surfaces on the edge of the vane minimize pressure pulse communication over the rib when the valve is in the closed position.

Abstract: A plurality of transmission ports which are respectively closed by air-permeable members are disposed in at least two members selected from among the intake duct, the air cleaner, and the air cleaner hose in the intake apparatus. Amounts of air permeation of the air-permeable members are set so as to be mutually different in order to tune intake sound generated from the inlet port and transmitted sound generated from each of the air-permeable members. In addition, a cleaner-incorporated member may be accommodated in the air cleaner, the cleaner-incorporated member having one end communicating with one of the intake duct and the air cleaner hose in such a manner as to be separated from an interior of the air cleaner and another end which is open in the interior of the air cleaner. An outer wall of the air cleaner is formed by a dual-use outer wall portion which also serves as an outer wall of the cleaner-incorporated member as well as an exclusive-use outer wall portion for forming only the air cleaner.

Abstract: The intake manifold assembly comprises three blocks each molded from a plastic material by injection molding, the three blocks consisting of a first block defining a half of the surge tank, a second block defining a half of the individual intake pipes and a third block defining a remaining half of the surge tank and a remaining half of the individual intake pipes. Thereby, the intake manifold assembly may be provided with various features for defining a pair of intake pipe sections arranged in a mutually parallel relationship while being made to be suitable for an injection molding process. Because the surge tank are defined by the first and third blocks while the individual intake pipes are defined by the second and third blocks, the intake manifold assembly essentially consisting of three blocks can internally define essential features required for a dual port intake device without requiring additional component members.

Abstract: The present invention pertains to a process and a system for controlling the intake valves of an internal combustion engine comprising at least two valves per cylinder. During the closing of the intake valves of a cylinder, provisions are made for closing a first valve and then for closing a second valve, the time between the closing of the first valve and the closing of the second valve being such that it permits the propagation toward the second valve of at least one overpressure generated in the first port by the closing of the first valve.

Abstract: The aim of the invention is to improve a bearing device for rotatably receiving a control element (2) in lines which guide mediums and pertain to a combustion engine with bearing receptacles (10, 11), in such a way that the assembly thereof is simplified. The bearing receptacles rotatably receive the control element and can be fixed in the lines. To resolve the aim of the invention, the bearing receptacles are connected by means of an at least partially elastic connecting element (14) in such a way that said receptacles form a bearing unit (1). The bearing receptacles, together with the connecting element and the inserted flap, are inserted in a receptacle which is provided in the induction pipe.