VARIABLE VALVE TIMING CONTROL DEVICE

• US 20180245488A1
• Filed: 12/20/2017
• Published: 08/30/2018
• Est. Priority Date: 02/24/2017
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.)
• Inventors: HAMASAKI, Hiroyuki, NOGUCHI, Yuji, ASAHI, Takeo, KAJITA, Tomohiro
• Granted Patent: US 10,443,455 B2
• Time in Patent Office: Days
• CPC Class Codes: F01L 1/022 Chain drive
• CPC Class Codes: F01L 1/3442 using hydraulic chambers with variable volume to transmit the rotating force
• CPC Class Codes: F01L 2001/34423 Details relating to the hydraulic feeding circuit
• CPC Class Codes: F01L 2001/34426 Oil control valves
• CPC Class Codes: F01L 2001/3443 Solenoid driven oil control valves
• CPC Class Codes: F01L 2001/3444 Oil filters
• CPC Class Codes: F01L 2001/34483 Phaser return springs
• CPC Class Codes: F15B 13/0402 for linearly sliding valves, e.g. spool valves
• CPC Class Codes: F15B 13/0442 with proportional solenoid allowing stable intermediate positions
• CPC Class Codes: F15B 21/041 Removal or measurement of solid or liquid contamination, e.g. filtering
• CPC Class Codes: F16K 15/1823 for ball check valves

Abstract

A variable valve timing control device includes a drive-side rotational body, a driven-side rotational body, a connecting bolt coaxially disposed with a rotary axis and connecting the driven-side rotational body to a camshaft, the connecting bolt formed with an advanced-angle port and a retarded-angle port from an outer circumferential surface of the connecting bolt through an inner space, a valve unit disposed at the inner space of the connecting bolt, and a check valve provided at an upstream in a supplying direction of fluid relative to the valve unit. The check valve includes a seat member formed with at least one circulation port at a position being away from the rotary axis; and a valve body configured to close the circulation port at a downstream in the supplying direction of the fluid relative to the seat member, the valve body including an opening portion about the rotary axis.

Claims

1. A variable valve timing control device, comprising:

a drive-side rotational body rotating synchronously with a crankshaft of an internal combustion engine;

a driven-side rotational body being coaxially disposed with a rotary axis of the drive-side rotational body and rotating integrally with a camshaft for opening and closing a valve;

a connecting bolt being coaxially disposed with the rotary axis and connecting the driven-side rotational body to the camshaft, the connecting bolt being formed with an advanced-angle port and a retarded-angle port from an outer circumferential surface of the connecting bolt through an inner space, the advanced-angle port and the retarded-angle port communicating with an advanced-angle chamber and a retarded-angle chamber, respectively, that are disposed between the drive-side rotational body and the driven-side rotational body;

a valve unit being disposed at the inner space of the connecting bolt; and

a check valve being provided at an upstream in a supplying direction of fluid relative to the valve unit, wherein

the check valve includes

a seat member being formed with at least one circulation port at a position being away from the rotary axis; and

a valve body being configured to close the circulation port at a downstream in the supplying direction of the fluid relative to the seat member, the valve body including an opening portion about the rotary axis.

2. The variable valve timing control device according to claim 1, wherein

the valve body is formed in a circular shape about the rotary axis,

the valve body is surrounded by an annular portion that is about the rotary axis, and

the valve body and the annular portion are connected with each other by a spring portion.

3. The variable valve timing control device according to claim 1, wherein the seat member is formed with the plurality of circulation ports.

4. The variable valve timing control device according to claim 2, wherein the seat member is formed with the plurality of circulation ports.

5. The variable valve timing control device according to claim 1, wherein the check valve is housed in the inner space of the connecting bolt.

6. The variable valve timing control device according to claim 2, wherein the check valve is housed in the inner space of the connecting bolt.

7. The variable valve timing control device according to claim 3, wherein the check valve is housed in the inner space of the connecting bolt.

8. The variable valve timing control device according to claim 1, wherein

an annular portion surrounding the valve body, the valve body, and a spring portion connecting the annular portion and the valve body are integrally formed to constitute a valve plate;

and

the check valve is configured such that the valve plate is disposed adjacent to the seat member.

9. The variable valve timing control device according to claim 2, wherein

an annular portion surrounding the valve body, the valve body, and a spring portion connecting the annular portion and the valve body are integrally formed to constitute a valve plate;

and

the check valve is configured such that the valve plate is disposed adjacent to the seat member.

10. The variable valve timing control device according to claim 3, wherein

an annular portion surrounding the valve body, the valve body, and a spring portion connecting the annular portion and the valve body are integrally formed to constitute a valve plate;

and

the check valve is configured such that the valve plate is disposed adjacent to the seat member.

11. The variable valve timing control device according to claim 5, wherein

an annular portion surrounding the valve body, the valve body, and a spring portion connecting the annular portion and the valve body are integrally formed to constitute a valve plate;

and

the check valve is configured such that the valve plate is disposed adjacent to the seat member.