Abstract: An air intake device includes: a valve body which includes a rotating shaft; a bearing member which rotatably supports the rotating shaft of the valve body; and an air intake port which includes a concave portion on which the bearing member is disposed, wherein the bearing member includes a positioning portion for positioning the bearing member with respect to the concave portion of the air intake port, facing surfaces which extend from the positioning portion along the concave portion of the air intake port and face each other in an inward radial direction of the rotating shaft with respect to the concave portion, with a gap therebetween, and protruding portions which protrude toward the concave portion of the air intake port from the facing surfaces and seal the gap.

Abstract: In this air intake apparatus, a plurality of respective air intake ports include sealing surfaces that include inner wall surfaces with which valve bodies come into contact at the closed positions of the valve bodies, and the rotation angles of valve bodies located on a side relatively close to a drive source from their open positions to their closed positions are larger than the rotation angles of valve bodies located on a side relatively opposite to the drive source when a plurality of valve bodies are rotated from their open positions to their closed positions.

Abstract: An object is to provide a silent chain that enhances the degree of design freedom for component dimensions to improve a chain strength with respect to a chain tensile force and that suppresses chain wear elongation. A silent chain includes a plurality of link plates arranged in a chain longitudinal direction and a chain width direction and coupled together by coupling pins so as to be bendable. The silent chain includes a plurality of plate longitudinal-direction trains each having the link plates arranged in the chain longitudinal direction. At least one of the plate longitudinal-direction trains includes a plurality of protruding-portion-installed plates having protruding portions protruding in the chain width direction from one side surface of a plate portion. The protruding-portion-installed plates 20 are arranged adjacently to one another in the chain longitudinal direction, with the protruding portions being different from one another in orientation in the chain width direction.

Abstract: An intake control valve includes a valve body being made of resin, the valve body configured to be pivotally mounted to a surge tank of an internal combustion engine, the valve body pivoting between an open position and a closed position to for opening and closing a fluid passage formed at a division wall, the division wall dividing inside of the surge tank into two portions; and a bearing being made of metal, the bearing being integrally provided with a first end portion of the valve body by insert molding when resin molding the resin-made valve body.

Abstract: An air intake apparatus includes an air intake apparatus body including a surge tank, a valve body rotatably attached to the surge tank and configured to rotate between an open position and a closed position to open and close a fluid passage formed at a partition wall dividing an inside of the surge tank into two parts, the valve body being out of contact with the partition wall at the open position and being in contact with the partition wall at the closed position, the air intake apparatus body being formed by a first member to which the valve body is attached and a second member joined to each other, and the first member including a jig-receiving portion arranged in a vicinity of the fluid passage and configured to receive a jig holding the first member when the first member and the second member are being joined to each other.

Abstract: An air intake device includes: a valve body which includes a rotating shaft; a bearing member which rotatably supports the rotating shaft of the valve body; and an air intake port which includes a concave portion on which the bearing member is disposed, wherein the bearing member includes a positioning portion for positioning the bearing member with respect to the concave portion of the air intake port, facing surfaces which extend from the positioning portion along the concave portion of the air intake port and face each other in an inward radial direction of the rotating shaft with respect to the concave portion, with a gap therebetween, and protruding portions which protrude toward the concave portion of the air intake port from the facing surfaces and seal the gap.

Abstract: An object is to provide a silent chain that enhances the degree of design freedom for component dimensions to improve a chain strength with respect to a chain tensile force and that suppresses chain wear elongation. A silent chain includes a plurality of link plates arranged in a chain longitudinal direction and a chain width direction and coupled together by coupling pins so as to be bendable. The silent chain includes a plurality of plate longitudinal-direction trains each having the link plates arranged in the chain longitudinal direction. At least one of the plate longitudinal-direction trains includes a plurality of protruding-portion-installed plates having protruding portions protruding in the chain width direction from one side surface of a plate portion. The protruding-portion-installed plates 20 are arranged adjacently to one another in the chain longitudinal direction, with the protruding portions being different from one another in orientation in the chain width direction.

Abstract: In this air intake apparatus, a plurality of respective air intake ports include sealing surfaces that include inner wall surfaces with which valve bodies come into contact at the closed positions of the valve bodies, and the rotation angles of valve bodies located on a side relatively close to a drive source from their open positions to their closed positions are larger than the rotation angles of valve bodies located on a side relatively opposite to the drive source when a plurality of valve bodies are rotated from their open positions to their closed positions.

Abstract: An intake control valve includes a valve body being made of resin, the valve body configured to be pivotally mounted to a surge tank of an internal combustion engine, the valve body pivoting between an open position and a closed position to for opening and closing a fluid passage formed at a division wall, the division wall dividing inside of the surge tank into two portions; and a bearing being made of metal, the bearing being integrally provided with a first end portion of the valve body by insert molding when resin molding the resin-made valve body.

Abstract: An air intake apparatus includes an air intake apparatus body including a surge tank, a valve body rotatably attached to the surge tank and configured to rotate between an open position and a closed position to open and close a fluid passage formed at a partition wall dividing an inside of the surge tank into two parts, the valve body being out of contact with the partition wall at the open position and being in contact with the partition wall at the closed position, the air intake apparatus body being formed by a first member to which the valve body is attached and a second member joined to each other, and the first member including a jig-receiving portion arranged in a vicinity of the fluid passage and configured to receive a jig holding the first member when the first member and the second member are being joined to each other.

Abstract: A fluid control valve, which includes a body forming a fluid passage and including a sealing surface positioned in the fluid passage, a valve body configured to rotate between an open position and closed position within the fluid passage, an elastic sealing member provided at a rim portion of the valve body, and a lip portion extended from the elastic sealing member to be directed towards a center portion of the valve body. The lip portion contacts the sealing surface and a surface of the lip portion facing the sealing surface is exposed to the fluid passage.

Abstract: An air intake apparatus for an internal combustion engine includes an intake manifold adapted for being connected to an engine head, the intake manifold including therein an intake passage through which a stream of fuel-air mixture passes and a receiving portion formed at an inner circumferential surface of the intake passage, the receiving portion being at a downstream side of stream of fuel-air mixture; a valve open/close mechanism including a cartridge made of resin, an open/close valve accommodated in the cartridge, and a shaft for rotating the open/close valve, the cartridge defining a first clearance with the receiving portion and defining a second clearance with the engine head; and a first elastic member arranged between the engine head and the cartridge of the valve opening/closing mechanism for elastically retaining the cartridge in an upstream direction of the stream of fuel-air mixture.

Abstract: A fluid control valve, which includes a body forming a fluid passage and including a sealing surface positioned in the fluid passage, a valve body configured to rotate between an open position and closed position within the fluid passage, an elastic sealing member provided at a rim portion of the valve body, and a lip portion extended from the elastic sealing member to be directed towards a center portion of the valve body. The lip portion contacts the sealing surface and a surface of the lip portion facing the sealing surface is exposed to the fluid passage.

Abstract: An air intake apparatus for an internal combustion engine includes an intake manifold adapted for being connected to an engine head, the intake manifold including therein an intake passage through which a stream of fuel-air mixture passes and a receiving portion formed at an inner circumferential surface of the intake passage, the receiving portion being at a downstream side of stream of fuel-air mixture; a valve open/close mechanism including a cartridge made of resin, an open/close valve accommodated in the cartridge, and a shaft for rotating the open/close valve, the cartridge defining a first clearance with the receiving portion and defining a second clearance with the engine head; and a first elastic member arranged between the engine head and the cartridge of the valve opening/closing mechanism for elastically retaining the cartridge in an upstream direction of the stream of fuel-air mixture.

Abstract: An intake system of an internal combustion engine includes an engine head, a resin made intake manifold mounted at the engine head and having intake passages, the resin made intake manifold forming a receiving portion on an inner wall of each intake passage at a downstream side, and a control unit disposed at the receiving portion and including a resin made cartridge, an opening and closing valve disposed at the cartridge, and a shaft rotating the valve, wherein a clearance is provided between an inner circumferential surface of the receiving portion and an outer circumferential surface of the cartridge to allow deformation of the resin made intake manifold, and the cartridge is provided with a flange held between the engine head and the resin made intake manifold.

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: An intake system of an internal combustion engine includes an engine head, a resin made intake manifold mounted at the engine head and having intake passages, the resin made intake manifold forming a receiving portion on an inner wall of each intake passage at a downstream side, and a control unit disposed at the receiving portion and including a resin made cartridge, an opening and closing valve disposed at the cartridge, and a shaft rotating the valve, wherein a clearance is provided between an inner circumferential surface of the receiving portion and an outer circumferential surface of the cartridge to allow deformation of the resin made intake manifold, and the cartridge is provided with a flange held between the engine head and the resin made intake manifold.

Abstract: A rotary solenoid for stabilizing performance is provided. A rotary solenoid 10 includes a pair of the first yoke 21 and the second yoke 22 placed oppositely in a rotor 24 providing a pair of magnetic poles by a permanent magnet, a core 23 enclosed by the first yoke 21 and the second yoke 22, and a coil 25 wound around the core 23 and forming a pair of magnetic poles in the first yoke 21 and the second yoke 22 by supplying electricity. These first yoke 21, second yoke 22, core 23, and coil 25 are resin-molded. A projecting portion 26a is provided in an outer surface on the opposite side of enclosing the core 23 by the first yoke 21 and the second yoke 22.

Abstract: A rotary solenoid for stabilizing performance is provided. A rotary solenoid 10 includes a pair of the first yoke 21 and the second yoke 22 placed oppositely in a rotor 24 providing a pair of magnetic poles by a permanent magnet, a core 23 enclosed by the first yoke 21 and the second yoke 22, and a coil 25 wound around the core 23 and forming a pair of magnetic poles in the first yoke 21 and the second yoke 22 by supplying electricity. These first yoke 21, second yoke 22, core 23, and coil 25 are resin-molded. A projecting portion 26a is provided in an outer surface on the opposite side of enclosing the core 23 by the first yoke 21 and the second yoke 22.

Abstract: A rotary solenoid apparatus includes a rotation shaft, a regulating means for regulating the rotation range of the rotating shaft, a permanent magnet fixed to the rotating shaft in a body, a spring for urging the rotating shaft in the circumferential direction, a yoke having a pair of stator portions being opposite to the permanent magnet with a predetermined clearance, a coil wound on the yoke and an energization control means for controlling the energization of the coil so that the coil is selectively excited. The permanent magnet is magnetized in the radial direction of the rotation shaft.