Variable intake system with variable valve

Patent metadata

Field	Value
Publication number	US-9644581-B2
Application number	US-201414517367-A
Country	US
Kind code	B2
Filing date	Oct 17, 2014
Priority date	May 19, 2014
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A variable intake system may include an air duct that guides intake air into an engine and a variable valve having a variable opening degree, to adjust an amount of the intake air, wherein the air duct includes a first inlet and a second inlet that may be opened to an outside, wherein the air duct has a first flow path having one end connected with the first inlet and a second flow path having one end connected with the second inlet, wherein the second flow path shares a part of the first flow path, wherein another end of the first flow path and another end of the second flow path share a same outlet, and wherein a length of the second flow path may be longer than a length of the first flow path.

First claim

What is claimed is:

1. A variable intake system which has an air duct that guides intake air into an engine and a variable valve comprising a valve flap having a variable opening degree to adjust an amount of the intake air,
wherein the air duct includes a first inlet and a second inlet that are opened to an outside,
wherein the air duct has a first flow path having one end connected with the first inlet and a second flow path having one end connected with the second inlet,
wherein the second flow path shares a part of the first flow path,
wherein another end of the first flow path and another end of the second flow path share a same outlet,
wherein a length of the second flow path is longer than a length of the first flow path, and
wherein the valve flap has a shape in which a lower portion of the valve flap is bent to form a predetermined angle with an upper portion of the valve flap in a cross section of the valve flap in the length direction of the first flow path or a shape in which the valve flap gradually curves toward the lower portion thereof, such that a lower end of the valve flap is spaced apart from an extended line which connects a center of the valve hinge and the upper portion of the valve flap in a direction in which the valve flap is opened, in a cross section of the valve flap in the length direction of the first flow path.

2. The variable intake system of claim 1 , wherein a cross section of the first flow path is larger than a cross section of a portion of the second flow path which is not shared with the first flow path.

3. The variable intake system of claim 1 , wherein an opening degree of the variable valve is varied by a variation in pressure in the air duct in accordance with a variation in an amount of the intake air.

4. The variable intake system of claim 3 , wherein the variable valve is mounted at the one end of the first flow path to open and close a part of the first flow path which is not shared with the second flow path.

5. The variable intake system of claim 4 , wherein when the variable valve is opened, all of the air flowing in through both the first inlet and the second inlet is supplied to the engine, and when the variable valve is closed, only air flowing in through the second inlet is supplied to the engine.

6. The variable intake system of claim 5 ,
wherein when the variable valve is closed or when the variable valve is opened, air column resonance frequency is adjusted to be increased or decreased in accordance with

Air
⁢

⁢
Column
⁢

⁢
Resonance
⁢

⁢
Frequency

=

Sound
⁢

⁢
Velocity

2
×

(

Length
⁢

⁢
of
⁢

⁢
Air
⁢

⁢
Column

+

0.3
×
Diameter
⁢

⁢
of
⁢

⁢
Air
⁢

⁢
Column

)

×

Integer
⁡

(

1
,
2
,
…

)

,

wherein a length of the first flow path is L 1 , a length of a portion of the second flow path, which is not shared with the first flow path, is L 2 , a length of the second flow path is L 1 +L 2 , a diameter of a cross section of the first flow path is D 1 , a diameter of a cross section of a part of the second flow path, which is not shared with the first flow path, is D 2 , when the variable valve is closed, a length of the air column is L 1 +L 2 and a diameter of the air column is an arbitrary value associated with D 1 and D 2 , and when the variable valve is opened, the length of the air column is L 1 and the diameter of the air column is D 1 .

7. The variable intake system of claim 4 , wherein the valve flap rotates on an axis perpendicular to a length direction of the first flow path and has a shape that is selectively substantially identical to a cross section of the first flow path.

8. The variable intake system of claim 7 , wherein the variable valve further includes:
a valve hinge which is an axis on which the valve flap rotates; and
a valve spring which has one end supported by the valve flap and another end supported by the air duct, and provides restoring force to the valve flap which rotates on the valve hinge as a rotation axis.

9. The variable intake system of claim 8 ,
wherein the variable valve further includes a valve stopper which is formed or mounted at a left end portion or a right end portion from the valve hinge in a cross section of the variable valve in a length direction of the first flow path.

10. The variable intake system of claim 9 ,
wherein the valve hinge is positioned at an upper portion in a cross section of the first flow

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Jung Jungwu
• Lee Seunghyun
• Jang Younghak
• Han Youngho
• Cho Yang-Rae
• Jung Hyun-Soo

Classifications

• F02M35/10091 Primary

  characterised by details of intake ducts: shapes; connections; arrangements (ducts within or on the plenum chamber F02M35/10039) · CPC title

• Y10T137/86815

  Multiple inlet with single outlet · CPC title

• F02B27/02

  the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means (in exhaust systems only F02B27/06) · CPC title

• F16K1/20

  with axis of rotation arranged externally of valve member · CPC title

• F02B31/06

  Movable means, e.g. butterfly valves · CPC title