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 air intake device includes: an air intake port; and a valve that includes an elastically deformable seal portion disposed in Ha side end portion, and switches between flow paths of the air intake port by being turned around a turning shaft, wherein the side end portion of the valve is provided with a curved side end portion that extends from one end portion side to the other end portion side along an extension direction of the turning shaft while being curved.

Abstract: An air intake device includes: an air intake port; and a valve that includes an elastically deformable seal portion disposed in Ha side end portion, and switches between flow paths of the air intake port by being turned around a turning shaft, wherein the side end portion of the valve is provided with a curved side end portion that extends from one end portion side to the other end portion side along an extension direction of the turning shaft while being curved.

Abstract: An intake device of an internal combustion engine, includes: a plurality of intake ports which have outer walls and partition walls and are adjacent to each other via the partition walls; a valve body which is provided in each of the intake ports, and switches a flow path of the intake port by rotation around a rotation shaft; a holding member which is installed on each of the outer walls and the partition walls; and a rolling bearing which is mounted on at least one of the holding members, and supports the valve body to be freely rotatable, wherein the holding member includes a wall surface between the rolling bearing and the valve body in a direction in which the rotation shaft extends.

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 device of an internal combustion engine, includes: a plurality of intake ports which have outer walls and partition walls and are adjacent to each other via the partition walls; a valve body which is provided in each of the intake ports, and switches a flow path of the intake port by rotation around a rotation shaft; a holding member which is installed on each of the outer walls and the partition walls; and a rolling bearing which is mounted on at least one of the holding members, and supports the valve body to be freely rotatable, wherein the holding member includes a wall surface between the rolling bearing and the valve body in a direction in which the rotation shaft extends.

Abstract: The present air intake control valve includes a valve body and a seal portion being elastically deformable to seal between an inner wall surface of an air intake port and the valve body. The seal portion is formed in a bending configuration including a first hinge portion and a second hinge portion each serving as a supporting point upon elastic deformation of the seal portion. One of the first hinge portion and the second hinge portion is arranged at an upstream side of the air intake port and the other of the first hinge portion and the second hinge portion is arranged at a downstream side in a state where the valve body is at a closed position.

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 air intake device includes: an air intake port; and a valve that includes an elastically deformable seal portion disposed in a side end portion, and switches between flow paths of the air intake port by being turned around a turning shaft, wherein the side end portion of the valve is provided with a curved side end portion that extends from one end portion side to the other end portion side along an extension direction of the turning shaft while being curved.

Abstract: An intake device includes: a plurality of intake ports which are adjacent to each other with a partition wall interposed therebetween; a valve body provided for each of the plurality of intake ports; a rotating shaft which rotates along with the valve body; and a bearing member which is disposed between the intake ports adjacent to each other and rotatably supports the rotating shaft of the valve body, wherein the bearing member includes a bearing main body having a bearing hole which rotatably supports the rotating shaft, and an arm portion which extends in a length larger than an inner diameter of the bearing hole from the bearing main body along the partition wall between the intake ports adjacent to each other and configures a bearing-side welding portion.

Abstract: An intake device includes: an intake port; a valve body which is disposed in the intake port and rotated around a rotating shaft between an opening position and a closing position; and a seal surface which is integrally provided at the intake port and made up of an inner wall surface with which the valve body comes into contact at the closing position of the valve body, wherein the seal surface includes a first seal surface having an inner contact portion which protrudes to the inside of the intake port and a first outer contact portion which is located further to the outside than the inner contact portion, and a second seal surface having a second outer contact portion without having the inner contact portion.

Abstract: The present air intake control valve includes a valve body and a seal portion being elastically deformable to seal between an inner wall surface of an air intake port and the valve body. The seal portion is formed in a bending configuration including a first hinge portion and a second hinge portion each serving as a supporting point upon elastic deformation of the seal portion. One of the first hinge portion and the second hinge portion is arranged at an upstream side of the air intake port and the other of the first hinge portion and the second hinge portion is arranged at a downstream side in a state where the valve body is at a closed position.

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: This air intake control valve includes a valve body provided in an air intake port, a rotating shaft rotating together with the valve body, an actuator generating drive force in a linear direction, a link member having an engaging portion provided on a side opposite to the rotating shaft and an actuator connection portion connected to the actuator, connecting the rotating shaft and the actuator to convert the drive force of the actuator in the linear direction into drive force in a rotational direction and transmit the drive force that has been converted to the rotating shaft, and a retaining portion engaging with the engaging portion to restrict movement of the engaging portion of the link member in an outward direction while allowing rotation of the engaging portion of the link member.

Abstract: An airflow control apparatus does not impede fluid flow and does not reduce intake efficiency even when a flow passage area is decreased by the valve area. The airflow control apparatus includes a housing whose interior forms a fluid passage, bushes attached to the housing interior, a shaft held by the bushes, and a valve attached to the housing interior and rotatable in synchronization with the shaft. The passage includes an upstream passage, a dead band, and a downstream passage. Bush attachment grooves are provided in a portion of the passage. The bottom surface of the bush attachment grooves include an opening. The bushes are rotatably fitted to the opening and are attached to the housing interior. A first cross section perpendicular to a flow direction in the upstream passage has a larger cross-sectional area than a second cross section perpendicular to the flow direction in the downstream passage.

Abstract: An intake device includes: an intake port; a valve body which is disposed in the intake port and rotated around a rotating shaft between an opening position and a closing position; and a seal surface which is integrally provided at the intake port and made up of an inner wall surface with which the valve body comes into contact at the closing position of the valve body, wherein the seal surface includes a first seal surface having an inner contact portion which protrudes to the inside of the intake port and a first outer contact portion which is located further to the outside than the inner contact portion, and a second seal surface having a second outer contact portion without having the inner contact portion.

Abstract: An intake device includes: a plurality of intake ports which are adjacent to each other with a partition wall interposed therebetween; a valve body provided for each of the plurality of intake ports; a rotating shaft which rotates along with the valve body; and a bearing member which is disposed between the intake ports adjacent to each other and rotatably supports the rotating shaft of the valve body, wherein the bearing member includes a bearing main body having a bearing hole which rotatably supports the rotating shaft, and an arm portion which extends in a length larger than an inner diameter of the bearing hole from the bearing main body along the partition wall between the intake ports adjacent to each other and configures a bearing-side welding portion.