Patent ID: 9399973
Filing Date: 2016-07-26
CPC Classification: F02B,F02M,Y02T

Claim Text:
1. An intake device comprising: 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, the valve body including a valve body main body extending in a radial direction and an elastically deformable seal member provided along an outer periphery of the valve body main body; a seal surface which is integrally provided at the intake port and made up of an inner wall surface with which the seal member comes into contact in the closing position of the valve body; wherein the seal surface includes a first seal surface possessing an inner contact portion which protrudes to the inside of the intake port along the valve body and a first outer contact portion which is located further away in the radial direction from the valve body than the inner contact portion, and a second seal surface possessing a second outer contact portion without an inner contact portion that protrudes to the inside of the intake port along the valve body; the valve body possessing a substantially rectangular shape with four sides in a plan view; the inner contact portion being provided on an upstream side of the substantially rectangular shape of the valve body, and the first outer contact portion being provided on a downstream side of the substantially rectangular shape of the valve body; the seal member including a first seal portion configured to come into contact with the inner contact portion and the first outer contact portion of the first seal surface in the closing position value body, and a second seal portion configured to come into contact with the second outer contact portion of the second seal surface in the closing position of the valve body; the first seal surface being provided in a portion of the inner wall surface which, in the closing position, contacts a first side of the valve body, the first side of the valve body being one of: (i) a side of the valve body on an upstream side extending along an extension direction of the rotating shaft, and (ii) a side of the valve body on a downstream side and extending along the extension direction of the rotating shaft; the second seal surface being provided in a portion of the inner wall surface which, in the closing position, contacts a second side of the valve body, the second side of the valve body being the other one of: (i) the side of the valve body on the upstream side and extending along the extension direction of the rotating shaft, and (ii) the side of the valve body on the downstream side and extending along the extension direction of the rotating shaft; and the second seal surface being further provided in a portion of the inner wall surface which, in the dosing position, contacts a pair of sides of the valve body extending in a direction intersecting the extension direction of the rotating shaft.