Abstract: An intake system is provided with an intake flow control valve (300) provided in an intake port (50) upstream of an intake valve (70). The intake flow control valve (300) may be switched between at least a first position (300A) and a second position (300B), in accordance with the operating state of an engine, by rotating a rotary shaft (360), which is supported by a rotary shaft support part (350). In the first position, the clearance between the valve element and the inner wall of the intake port is small. In the second position, the clearance between the valve element and the inner wall of the intake port is large.

Abstract: An air intake apparatus for an internal combustion engine is an apparatus introducing intake air into a combustion chamber, and includes an intake manifold attached to a cylinder head, and a cartridge fitted into the intake manifold. The cartridge includes a tube-like main body forming an air intake channel, a partition provided on the main body to separate the air intake channel into first and second passages, and an air intake control valve capable of reducing a channel cross sectional area of at least one of the first and second passages separated by the partition.

Abstract: A valve assembly is disclosed that includes a first and a second valve assembly parts that collectively define a duct. The valve assembly also includes a valve unit that includes a housing defining a fluid flow path therethrough. The valve unit is coupled to the first valve assembly part such that the fluid flow path is in fluid communication with the duct. A control valve is also included for controlling flow of fluid in the flow path. Furthermore, the valve assembly includes a sealing member that seals a space between the first valve assembly part and the second valve assembly part, that seals a space between the first valve assembly part and the valve unit, and that dampens vibration transmitted to the valve unit.

Abstract: An intake system is provided with an intake flow control valve (300) provided in an intake port (50) upstream of an intake valve (70). The intake flow control valve (300) may be switched between at least a first position (300A) and a second position (300B), in accordance with the operating state of an engine, by rotating a rotary shaft (360), which is supported by a rotary shaft support part (350). In the first position, the clearance between the valve element and the inner wall of the intake port is small. In the second position, the clearance between the valve element and the inner wall of the intake port is large.

Abstract: A method of manufacturing a valve unit is disclosed that includes providing a plurality of injection molding dies that define a cavity corresponding in shape to the valve unit. The valve unit includes a housing and a valve, and the housing defines a fluid flow path with an axis having an upstream direction and a downstream direction corresponding to a predetermined direction of fluid flow in the fluid flow path. The valve is cantilevered and includes a valve body having a coupled end rotationally coupled to the housing and a free end, and the valve body rotates about the coupled end to thereby change flow through the fluid flow path. The method also includes simultaneously molding the housing and the valve within the cavity such that the valve body is formed with the free end extending away from the downstream direction of the axis of the fluid flow path.

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 control device for an internal-combustion engine has a casing having an intake passage through which intake air is supplied to a combustion chamber of the internal-combustion engine, an intake air control valve which is arranged at the intake passage, an actuator for actuating a shaft of the intake air control valve, and an engine control unit for controlling the actuator based on an operation state of the internal-combustion engine. The engine control unit makes an operation of the internal-combustion engine continue until a predetermined period has elapsed since an engine key switch became OFF, and controls the actuator such that an opening degree of the intake air control valve is in a predetermined valve closed state where the suction control valve is closed.

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: 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 valve assembly is disclosed that includes a first and a second valve assembly parts that collectively define a duct. The valve assembly also includes a valve unit that includes a housing defining a fluid flow path therethrough. The valve unit is coupled to the first valve assembly part such that the fluid flow path is in fluid communication with the duct. A control valve is also included for controlling flow of fluid in the flow path. Furthermore, the valve assembly includes a sealing member that seals a space between the first valve assembly part and the second valve assembly part, that seals a space between the first valve assembly part and the valve unit, and that dampens vibration transmitted to the valve unit.

Abstract: A method of manufacturing a valve unit is disclosed that includes providing a plurality of injection molding dies that define a cavity corresponding in shape to the valve unit. The valve unit includes a housing and a valve, and the housing defines a fluid flow path with an axis having an upstream direction and a downstream direction corresponding to a predetermined direction of fluid flow in the fluid flow path. The valve is cantilevered and includes a valve body having a coupled end rotationally coupled to the housing and a free end, and the valve body rotates about the coupled end to thereby change flow through the fluid flow path. The method also includes simultaneously molding the housing and the valve within the cavity such that the valve body is formed with the free end extending away from the downstream direction of the axis of the fluid flow path.

Abstract: A valve open and close apparatus includes a resin housing, a resin valve, and a shaft. The resin housing has a fluid passage inside the housing. The resin valve has a through hole inside the valve and opens and closes the fluid passage. The shaft is press fitted inside the through hole such that the shaft is assembled to the valve. The valve includes a first shaft bearing portions, a second shaft bearing portions, and a press-fit portion. The first shaft bearing portion forms a first slide portion between the housing and the first shaft bearing portion. The second shaft bearing portion forms a second slide portion between the housing and the second shaft bearing portion. The press-fit portion is located at a position other than a radially inward portion of each of the first and second shaft bearing portions. The shaft is press fitted into the press-fit portion.

Abstract: In a manufacturing method of a fluid control apparatus, a valve integrally formed with a valve shaft is assembled inside a housing. First and second bearing members are assembled inside the housing by inserting each of the first and second bearing members into a corresponding space between the housing and the valve shaft from a corresponding longitudinal end side of the valve shaft. A longitudinal position of the valve relative to the housing is adjusted through one of the following methods. A first contact portion is brought into contact with a first side face, and a second contact portion is brought into contact with a second side face. A first contact surface is brought into contact with a first longitudinal end face, and a second contact surface is brought into contact with a second longitudinal end face.

Abstract: A manufacturing method for a plural valve assembly is disclosed that includes providing a plurality of housings that each define a channel. Each housing includes at least one valve anchoring portion. The method also includes providing a plurality valves and providing a shaft. The method further includes coupling the plurality of valves to corresponding ones of the housings such that the valves can move relative to the housing between an open position and a closed position. The valves abut against the respective valve anchoring portion in the closed position. The method also includes coupling the shaft to the plurality of valves. Each of the plurality of valves abuts against the respective valve anchoring portion as the shaft is coupled thereto.

Abstract: An intake device has a passage member defining a fluid passage, a housing, a valve member and a shaft member. The housing is disposed in the passage member such that a passage of the housing is in communication with the fluid passage of the passage member. The valve member is disposed in the housing to open and close the passage of the housing. The valve member has a tubular portion and a wing portion extending from the tubular portion. The shaft member is disposed to pass through the passage member and the tubular portion of the valve member in a direction perpendicular to an axis of the fluid passage of the passage member. The shaft member is disposed such that a portion of the shaft member located inside of the tubular portion retains an elastic force against an inner wall of the tubular portion.

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.