Abstract: An airflow control apparatus includes a housing for being provided at an air intake passage of an engine and having a passage for allowing an intake air to flow therethrough, a shaft rotatably provided at the housing to extend across the air intake passage, and a valve body provided in the housing to rotate together with the shaft, wherein an opposing surface is provided at the passage to face a circumferential end portion of the valve body when the valve body is in a closing state, and a first inclined surface formed at a portion of the opposing surface extending in an inner circumferential direction of the passage.

Abstract: The present invention is a fuel injection system for small engines in which the fuel injection system takes the place of traditional carburetors and provides the engine with air, fuel and spark control. The fuel injection system is comprised of an electronic control unit (ECU) coupled with a throttle body, which has an integrated fuel injector. The ECU controls the amount of air that enters a cylinder by controlling the throttle plate, and the ECU controls the amount of fuel entering the air flow by controlling the injector. This fuel injection system offers to smaller engines the many advantages of fuel injected engines over carbureted engines such as increased fuel economy, better cold starting capabilities, lower outputs of harmful emissions and lower engine operating temperatures.

Abstract: An air valve and its method of use including an air valve housing; a throttle plate disposed on a throttle shaft; a driven gear attached on the throttle shaft; a brushless direct current motor assembly in connection via a pinion with the driven gear; an integrated electronic valve controller including digital signal processing on a circuit board; and a throttle position sensor on the circuit board, wherein the throttle position sensor includes at least one non-contact type sensor. In a preferred embodiment, the air valve includes an inlet port and an outlet port connected to an engine via an air intake manifold, such that re-circulated exhaust gas is introduced into the air intake manifold.

Abstract: A device is provided for producing and/or augmenting a partial vacuum in a motor vehicle, in particular for operating a partial vacuum brake servo-unit. The device includes, but is not limited to a throttle unit, which has at least one throttle valve housing and a throttle valve which is arranged so as to be rotatable in an angle range in a throttle channel in the throttle valve housing for controlling a fluid flow in the throttle channel. The device also includes, but is not limited to means for producing and/or augmenting partial vacuum, the means being configured as partial vacuum augmentation means integrated into the throttle valve housing, which partial vacuum augmentation means act according to Bernoulli's principle in the manner of a sucking jet pump to produce an augmented partial vacuum for at least one brake servo-unit.

Abstract: An engine unit includes a V-type engine and a throttle body assembly. The throttle body assembly has front and rear throttle bodies, an actuator and a second rotational shaft. The front throttle bodies include front throttle valves that open and close front cylinders. The rear throttle bodies include rear throttle valves that open and close rear cylinders. The actuator is disposed, in a longitudinal direction, between center axes of the front cylinders and center axes of the rear cylinders. A shaft center of the second rotational shaft is located to the front of or to the rear of a shaft center of a first rotational shaft.

Abstract: In a V-type multi-cylinder engine, a first fuel supply conduit is connected to fuel-injection valves in a first throttle body group corresponding to the first bank, and a second fuel supply conduit is connected to fuel injection valves in a second throttle body group corresponding to the second bank. A pair of first and second side plates connect adjacent ends of the first and second throttle body groups together. A distance between respective throttle bodies located in two ends of the first throttle body group is set shorter than a comparable distance between the throttle bodies located in two ends of the second throttle body group. A joint part for connectively receiving the fuel hose is provided at an end of the first fuel supply conduit in a way that the joint part is arranged between the two side plates.

Abstract: An intake charge regulating apparatus for an engine includes a throttle body having a throttle bore formed therein for communicating with an intake port, and a throttle valve for controlling flow through the throttle bore. A throttle-driving mechanism includes an electric motor and a transmission mechanism for decelerating a driving force of the electric motor and for transmitting the driving force to the throttle valve. A camshaft sprocket is fixed to an end portion of a camshaft, which is included in a valve train for driving intake and exhaust valves in a cylinder head to open and close. The throttle-driving mechanism is arranged opposite a side where the camshaft sprocket is located in an axis direction of the crankshaft. The electric motor is disposed between the throttle body and the cylinder head in top plan view.

Abstract: An air-intake device includes a throttle valve pivotally movable around a shaft connected to one end of the throttle valve and an airflow passage formed in the intake air passage above an upper end of the throttle valve. In a region where an amount of intake air is small (i.e., in a region where an opening-degree of the throttle valve is small), an amount of intake air passing through the airflow passage is precisely controlled. In the same region, a high-speed airflow is generated in the airflow passage thereby to formulate a uniform air-fuel mixture in a combustion chamber of an internal combustion engine. These functions are easily realized by simply adding a member for forming the airflow passage to a throttle valve unit disposed in the intake air passage.

Abstract: An engine actuator includes a sensor assembly driven by an electric motor through a worm gear. An output gear is also driven by the electric motor about an axis transverse to the electric motor output shaft. A bearing located between the actuator housing and the output gear shaft limits gear shake of the output gear during operation of the engine actuator. A coupling mounted on the output gear shaft outside the actuator housing limits axial movement of the output gear shaft.

Abstract: A leisure vehicle equipped with an internal combustion engine as a power unit to drive the leisure vehicle, including a drive wheel, a slip sensor unit configured to detect a slip of the drive wheel, a throttle device mounted to the internal combustion engine, a throttle valve position changing device configured to change a position of a throttle valve of the throttle device, a throttle close operation sensor unit configured to detect that a rider has performed a throttle close operation to close a throttle of the throttle device, and a controller configured to control an operation of the throttle valve position changing device.

Abstract: Provided is a throttle valve device for an internal combustion engine which is favorably protected from icing, and enables a favorable control of the intake flow rate by avoiding an abrupt increase in the flow rate particularly in a small opening angle range. An upstream recess (21) and a downstream recess (22) are formed in a lower part of the throttle bore (11) of the throttle valve device. Moisture that may deposit on the inner wall of the throttle bore is allowed to be drained to the recesses. A cross sectional area of one of the recesses over which the lower edge of the throttle valve member sweeps as the throttle valve member (30) opens from the fully closed position is smaller than that of the other recess so that an abrupt change in the intake flow rate can be avoided in a small opening angle region.

Abstract: Providing a butterfly valve-type throttle valve that can improve the reliability in fixing a valve body to a valve shaft. A butterfly valve-type throttle valve 10 includes a valve shaft 12 extending across an intake air passage 5 of an internal combustion engine, and a butterfly valve-type valve body 14 for adjusting a flow rate of an intake air flowing through the intake air passage 5 by rotating in unison with the valve shaft 12. The valve body 14 is constituted by two split members 20, and it is configured such that the split members 20 are coupled to each other by welding means 36, which is coupling means that uses no screw, and that an axial hole 34 for fitting with the valve shaft 12 is formed through the coupling. A gap closing member 16 is provided on a circumferential edge portion of the valve body 14 for closing a gap between the valve body 14 positioned at a fully closed position and a passage wall surface 5a of the intake air passage 5.

Abstract: An air intake control apparatus includes a body forming an intake passage for an internal combustion engine, a bore member retained within the body to be movable relative to the body and having a bore being in communication with the body and having an internal peripheral surface forming a portion of the intake passage, at least one shaft body penetrating through the bore member and rotatably provided at the body, at least one valve body fixed to the shaft body so as to adjust an opening degree of the intake passage in the bore member, and a reference portion defining a relative position of the bore member to the shaft body in an axial direction of the shaft body.

Abstract: The present invention relates to a control apparatus for a throttle stop. The control apparatus provides accurate and consistent throttle stop operation.

Abstract: A throttle apparatus embedding an electronic control unit in which a circuit board of the electronic control unit is embedded within a throttle body and a connector for connecting to an external portion connected to a terminal provided in the circuit board protrudes from an outer wall of the throttle body in a direction approximately along a terminal side of the circuit board surface from one side line of the circuit board, wherein the circuit board is storable within the throttle body by selecting an optional mounting direction from at least two or more directions having different angles on the same plane around a center portion of the circuit board, and an insertion portion capable of protruding the connector to an external portion through an outer wall of the throttle body is provided at each of corresponding positions of the outer wall.

Abstract: A throttle valve assembly is held within a passageway in a throttle body. The assembly includes a plate and a pivot shaft. The pivot shaft extends through the mounting receptacle and engages with the throttle body. A method of making a series of throttle bodies includes molding multiple like bodies having first and second passageway portions. The first portions are sized to receive butterfly valves of a standard size. The second portions, positioned downstream from the first portions, have cross sectional openings equal to or smaller than the first portions. The second portions are machined or molded to various sizes adapted to flow fluid into the in-take ports of various size engines.

Abstract: Provided is a butterfly valve-type throttle valve of an internal combustion engine capable of absorbing a dispersion in valve opening degree at closed positions to reduce a leakage of air by solving problems, for example, with a multi-arrayed variable intake valve device in which a plurality of throttle valves mounted on a single turning shaft are opened and closed, a dispersion in valve opening degree is liable to occur at the closed positions due to the mounting errors of the throttle valves on the turning shaft and, accordingly, it is difficult to reduce the leakage of air. A clearance closing member (12) is supported in a floating state along a peripheral edge of a valve body (11) and displaced or elastically deformed to eliminate or reduce a clearance between the clearance closing member and an inner wall surface (2a) of an intake passage.

Abstract: A carburetor having a carburetor body in which an intake channel portion is formed. At least one fuel opening opens out into the intake channel portion. Pivotably mounted in the intake channel portion is a butterfly valve that in a completely opened position divides the intake channel, in the region of the butterfly valve, into a mixture channel and a feed channel, so that in the completely opened position of the butterfly valve, flowing into the feed channel is combustion air having a fuel content that is less than the fuel content in the mixture channel. Provided in the intake channel portion is at least one partition section that extends between the feed channel and the mixture channel. The partition section is formed on the carburetor body.

Abstract: A throttle valve unit is disclosed that includes a main body having a cylinder portion defining a fluid passage. The main body also includes a fastening portion projecting from an outer peripheral surface of the cylinder portion for fastening to a separate member. The cylinder portion defines an axis. The throttle valve unit also includes a throttle valve that is rotatably supported by the cylinder portion for opening and closing the fluid passage. The throttle valve is supported by the cylinder portion at a support area. The fastening portion is provided at approximately the same axial position relative to the axis as the support area of the throttle valve and includes a plurality of mounting portions for coupling to the separate member and a plurality of connecting portions extending between the mounting portions.

Abstract: A vortex generator is disclosed for flow of a fluid. The vortex generator includes a housing that includes a passage through which the fluid flows. The vortex generator also includes a valve that is movably coupled to the housing between a fully closed position and a fully open position for changing flow of the fluid in the passage. The valve includes an open portion that defines a main aperture for generating a vortex in the flow of the fluid. Also, the valve has an intermediate position between the fully closed position and the fully open position. The housing further includes a recessed portion such that the recessed portion of the housing and the valve cooperate to define a sub-aperture through which the fluid flows when the valve is positioned in the intermediate position. A method of manufacturing the vortex generator is also disclosed.

Abstract: A butterfly valve device (1), particularly an electrically actuated butterfly valve device (1) e.g. for use in an intake manifold of an internal combustion engine is designed in such a way that the effort required for assembling the intake manifold can be reduced while the requirements regarding dimensional tolerances and tightness can be met and the number of parts is minimized. This aim is achieved by the fact that at least one housing part (3) of the butterfly valve device (1) is embodied monolithically along with an intake pipe (15) that is disposed upstream or downstream of the butterfly valve device (1).

Abstract: A magnesium-based throttle body is disclosed. The throttle body is manufactured by using a mold for manufacture of a throttle body. The throttle body includes a cooling water tube fixing portion into which a cooling water tube is press-inserted, the cooling water tube fixing portion being formed integrally with the throttle body.

Abstract: The present invention provides a flexible fuel internal combustion engine utilizing impulse charging technology. The internal combustion engine includes a fuel sensor which determines the type of fuel currently being supplied to the engine, for example, either gasoline or E85. Based upon this determination, the impulse charging will be inactive (if gasoline is sensed) or active (if E85 is sensed). A speed or torque sensor is also utilized to determine if impulse charging will produce a volumetric efficiency that is better matched to the fuel octane characteristics.

Abstract: A device configured to impart a vortex motion in a fluid for an internal combustion engine, the internal combustion engine comprising a throttle. The device comprises at least one mixing element, the mixing element being disposed transversely to a main direction of a flow of said air/fuel mixture, and the device is configured to be disposed downstream of the throttle.

Abstract: An intake air control valve has a bore defining member and a butterfly-type valve member that includes a shaft and a valve body. The valve body has a pair of valve portions joined to the shaft and rotatable between a fully closed position and a fully opened position; Each of the valve portions has a central portion and opposite end portions along a direction of the rotational axis of the valve member. The thickness of each of the valve portions gradually increases from the central portion toward the end portions.

Abstract: A composite throttle body includes a composite body bore band manufactured out of a durable high-performance composite material that is overmolded with a lower cost commercial grade nylon to form the outer shell of the throttle body. By manufacturing the bore band from a high-performance polyimide-based polymer composite material, such as Vespel™ manufactured by DuPont, a better dimensional stability for improved minimum airflow control is achieved. Furthermore, the high-performance composite material provides the bearing surface for the throttle shaft and, therefore, eliminates the need for separate bearings. By using commercial grade nylon for the majority of the throttle body the manufacturing costs are lowered and weight savings are attained.

Abstract: An throttle valve is controlled by using an electric actuator. A cover for covering one end side of the throttle valve shaft is attached to a side wall of a throttle body. a throttle position sensor unit and an electronic control module for controlling the throttle valve is attached to an inner face of the cover. The throttle position sensor and the electronic control module are contiguous to each other and connected at a position contiguous thereto. The cover is provided with a connector portion for external connection of the electronic control module. A group of lead frames constituting terminals of the connector portion are embedded in the cover. Power source is supplied to a motor via the connector portion for external connection, the electronic control module and intermediary connectors provided at the cover. Thereby, by simplifying the cover for protecting the throttle valve.

Abstract: An intake control valve of an intake device of an internal combustion engine comprises a given portion defined by an air intake passage that leads to a combustion chamber of the engine through an intake valve; a pivot shaft passing through the given portion; and a valve plate secured to the pivot shaft to pivot therewith within the given portion. The valve plate is pivotal between a close position to close the air intake passage and an open position to open the air intake passage. When the valve plate assumes the close position, the interior of the air intake passage downstream the valve plate is formed with mutually isolated first and second air flows that are separated and oriented to enhance a flow of air/fuel mixture in the combustion chamber.

Abstract: An intake apparatus 100 includes a bore 102 and a throttle valve 104. A coating film 110 in which a lipophilic component and an oil-repellent component are dispersed is formed on at least one of an outer peripheral end surface 104a of the throttle valve 104 and a facing surface 102a of the bore 102 which faces the throttle valve 104.

Abstract: A cross-sectional shape of a first intake passage is formed in a circular shape and a cross-sectional shape of a second intake passage is formed in a rectangular shape. Thus, an opening area of a second intake throttle portion can be made larger than an opening area of a first intake throttle portion even when the opening area of the first intake throttle portion is narrow and an intake air quantity supplied into a combustion chamber of an engine is small as in the case of engine start-up or engine idling operation. Accordingly, an intended strong tumble flow in accordance with a demand for improving a combustion efficiency in the combustion chamber can be generated in the combustion chamber while achieving the intake air quantity necessary during the engine start-up or the engine idling operation.

Abstract: The present invention utilizes a single shaft with cam-actuated control valves and one linear solenoid for control of air flow control vales in the air induction system for a V-type engine. According to various exemplary embodiments of the present invention, the single shaft and one sensor are utilized to activate all control valves. Additionally, the present invention can also be used in in-line engines. Advantageously, the present invention utilizes one moving shaft and sensor to activate all control valves on both sides of the intake manifold without restricting air flow by locating the shaft in the middle of the manifold—lower housing. Further, the control valves are not attached with screws, thus eliminating a tolerance stack-up at assembly problem. The air induction sub-system can be manufactured with metals or plastic, or any combination thereof.

Abstract: The invention is directed to a shut-off valve for stopping the air-flow to an engine. A butterfly valve disposed in an air passage is moved between a first open position and second closed position in a controlled fashion to prevent the build up un-burnt fuel in the event of the activation of the valve.

Abstract: The present invention includes a butterfly valve that has a resin valve body and a shaft. The shaft includes a first shaft member and a second shaft member. The first and second shaft members are integrated with the valve body. The first and second shaft members are spaced from each other in an axial direction by a predetermined distance.

Abstract: The present invention concerns a multi-cylinder engine comprising a throttle body (5) in which a throttle intake-air passage (6) is provided. A throttle valve (7) is arranged in this throttle intake-air passage (6). Attached to the throttle body (5) is an injector (8), a leading end portion (9) of which is arranged opposite to an interior area of the throttle intake-air passage (6) downstream of the throttle valve (7) and is opened to provided a liquid-fuel injection hole (10). An intake-air pressure sensor (15) is attached to the throttle body (5) together with the injector (8) and an intake-air pressure introduction passage (18) has an inlet (18a) provided by opening an inner peripheral surface of the throttle intake-air passage (6) upstream of the injector (8).

Abstract: An electronic throttle control system and method which prevents obstructions from forming around a throttle plate during engine soak.

Abstract: A throttle body for an air intake system of an internal combustion engine, which includes a combustion chamber. The throttle body includes a body, a throttle plate and a coating. The body defines a throat through which air flows to the combustion chamber. The throttle plate, which is pivotally mounted with respect to the body, moves between first and second configurations with respect to the throat. The first configuration of the throttle plate substantially prohibits the air flow through the throat, and the second configuration of the throttle plate permits air flow through the throat. The coating, which is on at least one of the throat and the throttle plate, sheds contaminants that extend between the body and the throttle plate in the first configuration of the throttle plate.

Abstract: An electronic throttle device includes a throttle body, a bulge, and a ring. The throttle body includes a bore part having an approximately cylindrical shape. The bore part is connected to an upstream air hose such that the upstream air hose is located on an outside of the bore part and is fastened with a fastening member from an outside of the upstream air hose. The bulge is discontinuously located along an outer circumference of the bore part and has a groove along an outer circumference of the bulge. The ring has a cross-sectional dimension larger than a depth of the groove in a radial direction of the bore part, and is located into the groove to configurate a protruding part that protrudes radially outwardly and extends entirely on the outer circumference of the bore part.

Abstract: A throttle device for an internal combustion engine includes a throttle body, a transmission mechanism and an opener. A relief spring is interleaved between the throttle body and the opener. A back spring is interleaved between a final stage gear of the transmission mechanism and the opener. Each of the relief spring and the back spring is formed of a torsion coil spring. One or each of the terminal ends of the relief spring or the back spring is bent in a radial direction with respect to an axis of a coil portion. The opener or the final stage gear has at least one spring support portion with an engaging recess. The engaging recess is configured to permit insertion of the radially bent terminal end and to permit movement of the radially bent terminal end relative to the engaging recess in a circumferential direction with respect to an axis of the coil portion.

Abstract: An outboard motor has an internal combustion engine with a carburetor. The carburetor is designed to extend maintenance interval greatly by preventing or suppressing the deposition of solid matters in the gap between the intake passage and a butterfly-type throttle valve therein. The throttle valve is divided, by a valve axis about which the throttle valve turns, into a first valve part that turns from the downstream side to the upstream side with respect to an air intake direction when the fully closed throttle valve is opened and a second valve part that turns from the upstream side to the downstream side with respect to the air intake direction when the fully closed throttle valve is opened. The first valve part has an edge that moves to the upstream side past bypass ports when the fully closed throttle valve is opened, and the second valve part is provided with a through hole that allows air to flow therethrough at a flow rate necessary for idling when the throttle valve is fully closed.

Abstract: In an electronically controlled throttle valve system, a case of a DC motor and a valve housing forming a throttle body are mutually different in material and shape. Specifically, the valve housing is made of synthetic resin easy to be deformed and the case is made of metal hard to be deformed as compared with synthetic resin. An elastic body formed of a nearly annular metal plate spring is mounted between the DC motor and the valve housing. The elastic body includes a plate spring base part having a larger contact area with respect to a contacted portion and a plurality of tabs having a smaller contact area with respect to the contacted portion. The plate spring base part is in contact with the valve housing made of synthetic resin and each tab is in contact with the metal case.

Abstract: An intake structure for internal combustion engine includes an intake passage which is communicated with a combustion chamber of the internal combustion engine and through which air to be supplied to the combustion chamber flows; and a valve which is provided in the intake passage and which controls the airflow in the intake passage. The intake passage has a recess which is formed in the inner wall face of the intake passage and in which the valve is arranged; and a groove that is connected to the recess, at a substantially center position of the recess in a width direction of the recess, and that extends from the recess toward the downstream side of the intake passage.

Abstract: An exhaust gas throttle valve disposed in the exhaust system of an engine, wherein the center axis of rotation of a valve shaft 5 is set at a position deviated from the center axis of the exhaust gas passage, and two recessed portions 11 are symmetrically formed in the circumferential portion of a valve body 4 by cutting the surface thereof. The positions where the recessed portions 11 are formed are on the side of the center axis of the exhaust gas passage beyond the center axis 12 of rotation, and at where the peripheral portion of the valve body 4 faces the edge portions 9 where insertion holes 8 for the valve shaft 5 are opened in the exhaust gas passage. At these positions, the distance is a minimum between the peripheral portion of the valve body 4 and the edge portions 9. The recessed portions 11 work to increase the gap relative to the edge portions 9 at that positions.

Abstract: A method of pressure balancing across a bearing adjacent to a pressure differential is described. The method primarily includes providing a bypass port around the bearing for allowing a fluid flow from a first pressure side to a second pressure side. A throttle body for an engine is also described. The throttle body primarily includes: (1) a bearing cooperating with the valve body; and (2) a bypass port around the bearing for allowing the fluid flow from a first pressure side to a second pressure side.

Abstract: An object of the present invention is to provide a butterfly valve device made of resin, the butterfly valve device being little susceptible the secular change in gas flow (in particular, the minimum flow) or random changes. According to the present invention, when a butterfly valve is located at a full-closed position facing a peripheral lower surface of a semicircular portion with respect to a rotating shaft of the butterfly valve made of a resin material, a partial annular projection is adapted to radially inwardly extend towards an inner wall surface of a fluid path, the partial annular projection including a plane that contacts the peripheral lower surface of the valve to form a fluid seal.

Abstract: The present invention relates to a valve device for regulating a fluid, particularly a gaseous fluid, in a conduit portion, comprising a valve body fixed to a support spindle extending transversely into said portion and mounted with the ability to rotate therein, said conduit portion comprising, on either side of said spindle, opposing internal steps forming two bearing surface portions for corresponding edge parts of said valve body, in the closure position thereof, each step extending substantially over approximately half of the internal circumference of the conduit portion in the region of the mounting position of the support spindle.

Abstract: If a throttle valve is moved toward the mechanical full close position at high speed, the throttle valve may overshoot and collide against the full close position. This may damage and deform the throttle valve. It is an object of the present invention to set a lower limiter to the throttle valve so as to secure a margin to prevent such collision while attaining lowered fuel consumption or improved fuel efficiency.

Abstract: In order to provide a carburettor unit for an internal combustion engine, which can be used in particular for motor-driven small apparatus, including a throttle unit contained in a housing which has a throttle valve which executes a rotary movement for controlling the power of the internal combustion engine, wherein the rotary movement can be initiated by means of a control cable via a throttle valve shaft and wherein the control cable includes a control cable casing and a pull cord according to the design of a Bowden cable, which has a simple receptacle of a control cable and requires a small space for connection to the carburettor unit, it is proposed that to initiate the rotary movement in the throttle valve shaft there is provided a lever element which is disposed on the throttle valve shaft and which can be actuated by means of the pull cord and wherein a retaining device is further provided for receiving the control cable casing, which is also arranged on the throttle valve shaft.

Abstract: The present invention includes a rotational angle sensor having a magnetic detection device. The magnetic detection device includes a sensing section that can detect a change of a magnetic field produced by at least two magnets attached to a rotary member. A housing member is molded integrally with the magnetic detection device and a support member. The support member may serves as a protective member for protecting at least the sensing section of the magnetic detection device or may serve as a positioning member configured to enable at least the sensing section to be positioned relative to the positioning member.

Abstract: In an adjusting device with a transmission, high gear ratios are frequently required. In the transmission, powerful lateral forces are frequently generated, which must be absorbed by correspondingly dimensioned bearings. The present invention proposes an adjusting device having a transmission in which at least one gear is supported on an axle with a diameter that varies in the longitudinal direction. This achieves a uniform material loading of the axle supporting the gear and permits the diameter of the axle as a whole to be significantly reduced. The adjusting device is particularly intended for motor vehicles with an internal combustion engine.

Abstract: This invention relates of the problem, to create a butterfly valve neck without an emergence of a gap between the butterfly valve neck and the butterfly valve. This invention disposes the problem trough a parted butterfly valve neck, with between attached sealing, where the butterfly valve rest on in the closed location. This invention causes, to reduce considerable the leakage air quantity, by the absent of a gap, between the butterfly valve neck and the butterfly valve in the closed location. An inhibition of the butterfly valve in the parted butterfly valve is no more possible. By the inventive sealing of this invention, the motor can operate with a lower idling speed and a smaller emission. Further, an advantage of this invention is the regulation (adjustment) of the dimension of the parted butterfly valve and the sealing, where-by each of the rule curves by starting will achieved from the closed location.