Continuous variable valve duration apparatus and engine provided with the same

Patent metadata

Field	Value
Publication number	US-9752466-B2
Application number	US-201514923255-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	Dec 9, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

A continuous variable valve duration apparatus includes a camshaft, a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable, a plurality of inner brackets connected with the each wheel key and the each cam key, a slider housing of which the each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head and a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets.

First claim

What is claimed is:

1. A continuous variable valve duration apparatus comprising:
a camshaft;
a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively;
a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable;
a plurality of inner brackets connected with each wheel key and each cam key;
a plurality of slider housings of which each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head; and
a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets.

2. The continuous variable valve duration apparatus of claim 1 , further comprising:
first pins of which a wheel key slot, the each wheel key is slidably inserted thereto, is formed thereto respectively; and
second pins of which a cam key slot, the each cam key is slidably inserted thereto, is formed thereto respectively, and
wherein a first sliding pin hole and a second sliding pin hole, of which the first pins and the second pins are inserted thereto respectively, are formed to the inner bracket.

3. The continuous variable valve duration apparatus of claim 2 , wherein
the first pins and the second pins are formed as a circular cylinder shape; and
the first sliding pin hole and the second sliding pin hole are formed for the first pins and the second pins to be rotated within thereto.

4. The continuous variable valve duration apparatus of claim 3 , wherein
the wheel key slot of the first pins and the cam key slot of the second pins are formed opposite direction.

5. The continuous variable valve duration apparatus of claim 4 , wherein parts of the first sliding pin hole and the second sliding pin hole are opened for movements of the wheel key and the cam key not to be interrupted.

6. The continuous variable valve duration apparatus of claim 1 , further comprising:
a bearing inserted between the slider housing and the inner bracket.

7. The continuous variable valve duration apparatus of claim 1 , wherein the slider housings are connected by a slider housing connecting plate.

8. The continuous variable valve duration apparatus of claim 7 , wherein the control portion comprises a control shaft, and
wherein a shaft hole is formed to the housing connecting plate for the control shaft to be inserted thereto, and
a rotation center of the inner brackets is changed with respect to a rotation center of the camshaft according to a movement of the control shaft.

9. The continuous variable valve duration apparatus of claim 8 , wherein the control portion further comprises:
a control gear connected with the control shaft; and
a control motor engaged with the control gear and selectively rotating the control gear.

10. The continuous variable valve duration apparatus of claim 8 , wherein a hinge connecting portion hingedly connected with the hinge bracket is formed to the slider housing connecting plate.

11. The continuous variable valve duration apparatus of claim 1 , wherein the wheel is connected with the camshaft through a connecting pin.

12. An engine comprising:
a camshaft;
a plurality of wheels mounted to the camshaft, of which a wheel key is formed thereto respectively, and disposed corresponding to each cylinder;
a plurality of cam portions of which a cam and a cam key are formed thereto respectively, of which the camshaft is inserted thereto, of which relative phase angle with respect to the camshaft is variable and disposed corresponding to the each cylinder;
a plurality of inner brackets of which a first sliding pin hole and a second sliding pin hole, connected with each wheel key and each cam key are formed respectively thereto;
a plurality of slider housings of which each inner bracket is rotatably inserted thereto, and rotatably configured around a hinge bracket connected to a cylinder head;
first pins of which a wheel key slot, the each wheel key is slidably inserted thereto, is formed thereto respectively and rotatably inserted into the first sliding pin hole;
second pins of which a cam key slot, the each the cam key is slidably inserted thereto, is formed thereto opposite to the wheel key slot respectively, and rotatably inserted into the second sliding pin hole; and
a control portion selectively moving the slider housings to change relative position of a rotation center of the inner brackets.

13. The engine of claim 12 , wherein parts of the first sliding pin hole and the second sliding pin hole are opened for movements of the wheel key and the cam key not to be interrupted.

14. The engine of claim 12 , further comprising:
a bearing inserted between the slider housing and the inner bracket.

15. The engine of claim 12 , wherein the slider housings are connected by a slider housing connecting plate.

16. The engine of claim 15 , wherein the control portion comprises a control shaft, and
wherein a shaft hole is formed to the housing connecting plate for the control shaft to be inserted thereto, and
a rotation center of the inner brackets is changed with respect to a rotation center of the camshaft according to a movement of the control shaft.

17. The engine of claim 16 , wherein the control portion further comprises:
a control gear connected with the control shaft; and
a control motor engaged with the control gear and selectively rotating the control gear.

18. The engine of claim 16 , wherein a hinge connecting portion hingedly connected with the hinge bracket is formed to the slider housing connecting plate.

19. The engine of claim 12 , wherein the wheels are connected with the camshaft through a connecting pin.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Son You Sang
• Ha Kyoung Pyo
• Kim Back Sik

Classifications

• F01L2001/0473

  Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod · CPC title

• F01L2820/032

  Electric motors · CPC title

• F01L2001/0476

  Camshaft bearings · CPC title

• F01L1/047

  Camshafts · CPC title

• F01L2013/0078

  by modification of cam contact point by axially displacing the camshaft · CPC title