Intake air control valves
AssigneesAisan Kogyo Kabushiki Kaisha, Denso Corporation
InventorsTomiharu Isogai, Takuji Nakamura
Life of this patent
Estimating the term…
Abstract
An intake air control valve has a bore defining member and a butterfly-type valve member that includes a shaft and a valve body. The valve body has a pair of valve portions joined to the shaft and rotatable between a fully closed position and a fully opened position; Each of the valve portions has a central portion and opposite end portions along a direction of the rotational axis of the valve member. The thickness of each of the valve portions gradually increases from the central portion toward the end portions.
Claims20
An intake air control valve comprising:
- a bore defining member defining a bore through which an intake air flows;
- and
- a butterfly-type valve member comprising a shaft and a valve body;
- wherein the shaft is rotatably supported by the bore defining member and defining a rotational axis,
- wherein the valve body includes a pair of valve portions joined to the shaft, so that the valve body can rotate in a closing direction and an opening direction between a fully closed position and a fully opened position;
- wherein each of the valve portions has an opening side face, a closing side face and a thickness between the opening side face and the closing side face;
- wherein the thickness of each of the valve portions gradually increases from a central portion toward opposite end portions along a direction of the rotational axis.
An intake air control valve comprising:
- a body member defining a bore through which an intake air flows;
- and
- a butterfly-type valve member having a rotational axis and rotatably disposed within the bore;
- wherein the valve member comprises a valve body having a first face, a second face and a thickness between the first face and a second face;
- wherein the first face and the second face are disposed on opposite sides with respect to a rotational direction of the valve body;
- wherein the valve body further includes a central portion and opposite end portions along a direction of the rotational axis;
- and
- wherein the thickness of the central portion is less than the thickness of the end portions.
An intake air control valve comprising:
- a body member defining a bore through which an intake air flows;
- and
- a butterfly-type valve member having a rotational axis and rotatably disposed within the bore;
- wherein the valve member comprises a valve body having a support portion and a pair of valve portions;
- wherein the support portion extends along the rotational axis and the pair of valve portions are disposed on opposite sides of the support portion;
- wherein each of the valve portions has an opening side face and a closing side face;
- wherein the opening side face defines a flat surface and the closing side face defines a concave face, so that a thickness of each of the valve portions gradually increases from a central portion toward opposite end portions along a direction of the rotational axis;
- wherein the support portion has a central part and oppose end parts along the rotational axis;
- and
- wherein the support portion has a cross sectional area that gradually increases from the central part toward the opposite end parts.
Dependencies are inferred from the claim text.