Cooling-water control valve device

Patent metadata

Field	Value
Publication number	US-11149627-B2
Application number	US-202016779845-A
Country	US
Kind code	B2
Filing date	Feb 3, 2020
Priority date	Feb 7, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A cooling-water control valve device includes a valve member, a housing for accommodating the valve member, a pipe unit, a valve seat member, a spring and so on. The pipe unit has, at its axial end on a side facing to the valve member, an outside cylindrical portion and an inside cylindrical portion, which is coaxially arranged with the outside cylindrical portion at a radial-inside position of the outside cylindrical portion. An annular accommodation space is formed between the inside cylindrical portion and the outside cylindrical portion. The spring and the valve seat member are arranged in the annular accommodation space.

First claim

What is claimed is:

1. A cooling-water control valve device for controlling a flow amount of cooling water passing through an internal combustion engine, the cooling-water control valve device comprising:
a valve body member having a valve opened portion in a side wall of the valve body member, through which the cooling water flows, the valve body member being rotatable around a valve axis;
a housing for movably accommodating the valve body member, the housing being made of resin;
a pipe unit connected to the housing and operatively communicated to the valve opened portion when the cooling-water control valve device is in a valve opened condition, such that the cooling water flows through an inside of the pipe unit;
a valve seat member having a cylindrical shape and movable in an axial direction of the pipe unit, the valve seat member having a valve seat surface of an annular shape which is movably in contact with the side wall of the valve body member for sealing a gap between the valve body member and the pipe unit; and
a biasing member for biasing the valve seat member in a direction to the valve body member in such a way that the valve seat member is pushed to the side wall of the valve body member,
wherein the pipe unit has an inside cylindrical portion, an outside cylindrical portion, and a flange portion which are integrally formed with each other as one unit by a single continuous material, the flange portion extending in a radial-outward direction of the pipe unit from an axial end of the outside cylindrical portion,
wherein the inside cylindrical portion and the outside cylindrical portion are coaxially arranged with each other,
wherein the inside cylindrical portion is formed at a radial-inside position of the outside cylindrical portion,
wherein an annular accommodation space is formed between the inside cylindrical portion and the outside cylindrical portion,
wherein the biasing member and the valve seat member are provided in the annular accommodation space, such that the biasing member biases the valve seat member in a direction to the valve body member,
wherein an axial length of the outside cylindrical portion is larger than that of the inside cylindrical portion,
wherein the inside cylindrical portion and the outside cylindrical portion are inserted into the housing made of resin, and the flange portion is firmly attached to the housing made of resin by bolts,
wherein the valve seat member has a seat projection extending from an inner periphery of the valve seat surface and projecting in a radial-inward direction of the valve seat member, and
the seat projection covers an axial end of the inside cylindrical portion.

2. The cooling-water control valve device according to claim 1 , wherein
the outside cylindrical portion entirely covers an outer peripheral surface of the valve seat member.

3. The cooling-water control valve device according to claim 1 , wherein
a radial clearance between an outer peripheral surface of the valve seat member and an inner peripheral wall of the outside cylindrical portion is smaller than a radial clearance between an inner peripheral surface of the valve seat member and an outer peripheral wall of the inside cylindrical portion, and
the outer peripheral surface of the valve seat member is positioned to the inner peripheral wall of the outside cylindrical portion in a radial direction of the valve seat member.

4. The cooling-water control valve device according to claim 3 , wherein
a packing is provided between the inner peripheral surface of the valve seat member and the outer peripheral wall of the inside cylindrical portion.

5. The cooling-water control valve device according to claim 1 , wherein
the axial end of the outside cylindrical portion is a first axial end of the outside cylindrical portion, and
a second axial end of the outside cylindrical portion, an axial end of the valve seat member, and the axial end of the inside cylindrical portion are arranged in this order in the axial direction of the pipe unit away from the valve body member.

6. The cooling-water control valve device according to claim 1 , wherein
a seal member is provided between an outer peripheral wall of the outside cylindrical portion and the housing.

7. A cooling-water control valve device for controlling a flow amount of cooling water passing through an internal combustion engine, the cooling-water control valve device comprising:
a valve body member having a valve opened portion in a side wall of the valve body member, through which the cooling water flows, the valve body member being rotatable around a valve axis;
a housing for movably accommodating the valve body member, the housing being made of resin;
a pipe unit connected to the housing and operatively communicated to the valve opened portion when the cooling-water control valve device is in a valve opened condition, such that the cooling water flows through an inside of the pipe unit;
a valve seat member having a cylindrical shape and movable in an axial direction of the pipe unit, the valve seat member having a valve seat surface of an annular shape which is movably in contact with the side wall of the valve body member for sealing a gap between the valve body member and the pipe unit; and
a biasing member for biasing the valve seat member in a direction to the valve body member in such a way that the valve seat surface is pushed to the side wall of the valve body member,
wherein the pipe unit has an inside cylindrical portion, an outside cylindrical portion, and a flange portion, the flange portion extending in a radial-outward direction of the pipe unit from an axial end of the outside cylindrical portion,
wherein the inside cylindrical portion and the outside cylindrical portion are integrally formed with each other by a single continuous material and coaxially arranged with each other,
wherein the inside cylindrical portion is formed at a radial-inside position of the outside cylindrical portion,
wherein an annular accommodation space is formed between the inside cylindrical portion and the outside cylindrical portion,
wherein the biasing member and the valve seat member are provided in the annular accommodation space,
wherein an outer peripheral surface of the valve seat member is positioned by an inner peripheral wall of the outside cylindrical portion in a radial direction of the valve seat member,
wherein an axial length of the outside cylindrical portion is larger than that of the inside cylindrical portion,
wherein the inside cylindrical portion and the outside cylindrical portion are inserted into the housing made of resin, and the flange portion is firmly attached to the housing made of resin by bolts,
wherein the valve seat member has a seat projection extending from an inner periphery of the valve seat surface and projecting in a radial-inward direction of the valve seat member, and
the seat projection covers an axial end of the inside cylindrical portion.

8. A cooling-water control valve device for controlling a flow amount of cooling water passing through an internal combustion engine, the cooling-water control valve device comprising:
a valve body member having a valve opened portion in a side wall of the valve body member, through which the cooling water flows, the valve body member being rotatable around a valve axis;
a housing for movably accommodating the valve body member, the housing being made of resin;
a pipe unit connected to the housing and operatively communicated to the valve opened portion when the cooling-water control valve device is in a valve opened condition, such that the cooling water flows through an inside of the pipe unit;
a valve seat member having a cylindrical shape and movable in an

Assignees

• Denso Corp

Inventors

• Sano Ryo

Classifications

• F01P7/14 Primary

  the coolant being liquid · CPC title

• F16K5/061 Primary

  knee-joint · CPC title

• F16K5/0689

  between housing and plug · CPC title

• F16K3/26

  with fluid passages in the valve member · CPC title

• F01P2007/146

  using valves · CPC title