Patent ID: 9624838
Date: 2017-04-18
CPC Classifications: F02B,F02D,F16K,Y02T

Claim:
1. An air intake control valve comprising: a valve body provided at an air intake port to rotate around a rotation shaft between an open position and a closed position; and a seal portion arranged at a first side and a second side of an outer peripheral portion of the valve body in a direction orthogonal to the rotation shaft of the valve body and sealing between an inner wall surface of the air intake port and the valve body by making contact with the inner wall surface of the air intake port in a state where the valve body is at the closed position, the seal portion being elastically deformable, the seal portion being 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 being 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 of the air intake port in the state where the valve body is at the closed position, wherein the seal portion includes an attachment portion mounted to the valve body and connected to the first hinge portion, a connection portion connecting the first hinge portion and the second hinge portion, and a contact portion protruding outwardly from the second hinge portion, the connection portion of the seal portion arranged at the first side is configured to make contact with the attachment portion by a pressure difference between an upstream side and a downstream side in the state where the valve body is at the closed position, the connection portion of the seal portion arranged at the second side is configured to make contact with the contact portion by the pressure difference between the upstream side and the downstream side in the state where the valve body is at the closed position, and the contact portion is configured to make contact with the inner wall surface of the air intake port in a further closely contacting state by an application of a force in a direction in which the connection portion and the contact portion are elastically deformed with reference to the first hinge portion or the second hinge portion serving as the supporting point by the pressure difference between the upstream side and the downstream side in the state where the valve body is at the closed position.