Fluid control valve, and valve timing adjusting device employing same

Patent metadata

Field	Value
Publication number	US-11519306-B2
Application number	US-202117167323-A
Country	US
Kind code	B2
Filing date	Feb 4, 2021
Priority date	Aug 8, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A check valve is made of a resilient body wound in a ring form and is located in an annular flow passage. A displacement limiter includes: a limiter main body that is located on an outer side of the check valve and is configured to limit displacement of the check valve in a diameter increasing direction of the check valve; and a limiter flow passage that communicates between one side and the other side of the limiter main body in an axial direction to enable hydraulic oil to flow between the one side and the other side of the limiter main body through the limiter flow passage.

First claim

What is claimed is:

1. A fluid control valve configured to control flow of fluid supplied from a fluid supply source to a fluid supply destination, comprising:
an outer tubular portion;
an inner tubular portion that is located at an inside of the outer tubular portion;
an axial flow passage that is located between the outer tubular portion and the inner tubular portion and extends in an axial direction of the outer tubular portion and the inner tubular portion such that the axial flow passage conducts the fluid that flows from the fluid supply source to the fluid supply destination;
an annular flow passage that is located between the outer tubular portion and the inner tubular portion and is shaped in an annular form to extend in a circumferential direction of the outer tubular portion and the inner tubular portion while the annular flow passage is connected to the axial flow passage;
a valve seat surface that is shaped in a cylindrical form and is formed at the inner tubular portion in the annular flow passage;
a valve seat flow passage that communicates between the valve seat surface and an inside of the inner tubular portion;
a check valve that is made of a resilient body wound in a ring form and is radially located between the outer tubular portion and the inner tubular portion in the annular flow passage, wherein the check valve is placed in a valve opening state to enable flow of the fluid from the valve seat flow passage to the annular flow passage when a diameter of the check valve is increased in a diameter increasing direction to lift the check valve away from the valve seat surface, and the check valve is placed in a valve closing state to limit flow of the fluid from the annular flow passage to the valve seat flow passage when the diameter of the check valve is decreased to seat the check valve against the valve seat surface; and
a displacement limiter that includes:
a limiter main body that is formed separately from the outer tubular portion and the inner tubular portion, wherein the limiter main body is located on an outer side of the check valve in the annular flow passage and is configured to limit displacement of the check valve in the diameter increasing direction of the check valve; and
a limiter flow passage that communicates between one side and another side of the limiter main body in the axial direction of the outer tubular portion and the inner tubular portion to enable the fluid to flow between the one side and the another side of the limiter main body through the limiter flow passage.

2. The fluid control valve according to claim 1 , wherein the limiter main body is formed by a corrugated plate material that is wound in a ring form.

3. The fluid control valve according to claim 1 , wherein the limiter main body is formed by a spirally wound wire material that is further wound in a ring form.

4. The fluid control valve according to claim 1 , wherein:
the limiter main body is shaped in a tubular form; and
the limiter flow passage is a hole or a groove that is formed at the limiter main body and connects between one end surface of the limiter main body located on the one side in the axial direction and another end surface of the limiter main body located on the another side in the axial direction.

5. The fluid control valve according to claim 1 , wherein the limiter main body is one of a plurality of limiter main bodies, which are separated from each other in the circumferential direction in the annular flow passage, while the axial flow passage is one of a plurality of axial flow passages, and at least a portion of each of the plurality of limiter main bodies is located at a connection between the annular flow passage and a corresponding one of the plurality of axial flow passages.

6. The fluid control valve according to claim 1 , wherein the limiter main body is fixed to an outer peripheral wall of the check valve and is configured to move integrally with the check valve in response to a valve opening and closing operation of the check valve.

7. The fluid control valve according to claim 1 , wherein the limiter main body is resiliently deformable in a radial direction of the annular flow passage.

8. The fluid control valve according to claim 1 , further comprising a spool that is located at the inside of the inner tubular portion and is configured to move in the axial direction relative to the inner tubular portion, wherein the spool is configured to control the flow of the fluid between the fluid supply source and the fluid supply destination according to a position of the spool in the axial direction relative to the inner tubular portion.

9. The fluid control valve according to claim 1 , wherein the inner tubular portion is configured to move in the axial direction relative to the outer tubular portion at the inside of the outer tubular portion, and the inner tubular portion is configured to control the flow of the fluid between the fluid supply source and the fluid supply destination according to a position of the inner tubular portion in the axial direction relative to the outer tubular portion.

10. A valve timing adjusting device configured to adjust valve timing of an internal combustion engine, comprising:
a phase converter that is installed to a driven shaft of the internal combustion engine such that the phase converter is rotatable synchronously with a drive shaft of the internal combustion engine, wherein the phase converter includes a hydraulic chamber that serves as the fluid supply destination, and the phase converter is configured to shift a phase between the drive shaft and the driven shaft by the fluid supplied to the hydraulic chamber; and
the fluid control valve of claim 1 that is configured to control the fluid supplied from the fluid supply source to the hydraulic chamber.

11. The valve timing adjusting device according to claim 10 , wherein the fluid control valve is installed at a center part of the phase converter.

12. The fluid control valve according to claim 1 , wherein the limiter flow passage is one a plurality of limiter flow passages that are circumferentially arranged along the limiter main body and communicate between the one side and the another side of the limiter main body in the axial direction in the valve opening state of the check valve where the check valve is radially outwardly urged against the limiter main body.

13. The fluid control valve according to claim 1 , wherein the limiter main body does not radially inwardly apply an urging force against the check valve in the valve closing state of the check valve.

14. The fluid control valve according to claim 1 , wherein the limiter main body contacts an inner peripheral surface of the outer tubular portion.

Assignees

• Denso Corp

Inventors

• Hamada Takuya
• Otsubo Makoto
• Mitsutani Tetsuro
• Takahashi Kinya

Classifications

• F01L2001/34433

  Location oil control valves · CPC title

• F01L2001/3443

  Solenoid driven oil control valves · CPC title

• F01L1/3442 Primary

  using hydraulic chambers with variable volume to transmit the rotating force · CPC title

• F01L2301/00

  Using particular materials · CPC title

• F01L2001/34426

  Oil control valves · CPC title