Continuous variable valve duration apparatus and engine provided with the same

Patent metadata

Field	Value
Publication number	US-9822674-B2
Application number	US-201514948294-A
Country	US
Kind code	B2
Filing date	Nov 21, 2015
Priority date	Jun 22, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A continuously variable valve duration apparatus may include a camshaft, a plurality of first cams and second cams of which a cam key is formed respectively thereto, and of which relative phase angles with respect to the camshaft are variable, a plurality of rotation rings mounted to the camshaft and of which a ring key is formed thereto respectively, a plurality of inner brackets transmitting rotation of the camshaft to the cam keys of the first cams and the seconds respectively, a plurality of slider housings of which each inner bracket is rotatable inserted therein and of which a control slot is formed thereto respectively, an eccentric control shaft inserted into the control slots and a control portion selectively rotating the eccentric control shaft to move positions of the slider housing and change positions of the inner brackets.

First claim

What is claimed is:

1. A continuously variable valve duration apparatus comprising:
a camshaft;
a plurality of first cams and second cams of which a cam key is formed respectively thereto, and of which relative phase angles with respect to the camshaft are variable;
a plurality of rotation rings mounted to the camshaft and of which a ring key is formed thereto respectively;
a plurality of inner brackets transmitting rotation of the camshaft to the cam keys of the first cams and the seconds respectively;
a plurality of slider housings of which each inner bracket is rotatable inserted therein and of which a control slot is formed thereto respectively;
an eccentric control shaft inserted into the control slots; and
a control portion selectively rotating the eccentric control shaft to move positions of the slider housings and change positions of the inner brackets.

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

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

4. The continuously variable valve duration apparatus of claim 3 , wherein parts of the first sliding pin hole and the second sliding pin hole are opened for movements of the ring key and the cam key not to be interrupted.

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

6. The continuously variable valve duration apparatus of claim 1 , further comprising a guider mounted to a cylinder head, wherein the guider guides movements of the slider housings.

7. The continuously variable valve duration apparatus of claim 6 , wherein
a shaft hole is formed to the guider; and
the eccentric control shaft is rotatably mounted to the shaft hole.

8. The continuously variable valve duration apparatus of claim 1 , wherein the control portion comprises:
a control gear connected with the eccentric control shaft; and
a control motor engaged with the control gear.

9. The continuously variable valve duration apparatus of claim 1 , wherein the camshaft and the rotation ring are connected through a connecting pin.

10. The continuously variable valve duration apparatus of claim 1 , further comprising a spacer disposed to the camshaft for maintaining distances between one cylinder and neighboring cylinder.

11. An engine comprising:
a camshaft;
a plurality of first cams and second cams of which a cam key is formed respectively thereto, of which relative phase angles with respect to the camshaft are variable and the plurality of first cams and second cams disposed on a corresponding cylinder respectively;
a plurality of rotation rings mounted to the camshaft, of which a ring key is formed thereto respectively and the plurality of rotation rings disposed on the corresponding cylinder respectively;
a plurality of inner brackets transmitting rotation of the camshaft to the cam keys of the first cams and the seconds respectively, and disposed on the corresponding cylinder respectively;
a plurality of slider housings of which each inner bracket is rotatable inserted therein and of which a control slot is formed thereto respectively;
an eccentric control shaft inserted into the control slots; and
a control portion selectively rotating the eccentric control shaft to move positions of the slider housing and change positions of the inner brackets.

12. The engine of claim 11 , further comprising:
a first pin of which a ring key slot where the ring key is slidably inserted thereto is formed thereto; and
a second pin of which a cam key slot where the cam key is slidably inserted thereto is formed thereto; and
wherein a first sliding pin hole and a second sliding pin hole where the first pin and the second pin are inserted thereto respectively are formed to the inner brackets respectively.

13. The engine of claim 12 , wherein
the first pin and the second pin are formed as a circular cylinder shape; and
the first sliding pin hole and the second sliding pin hole are formed for the first pin and the second pin to be rotated within thereto.

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

15. The engine of claim 11 , further comprising a bearing inserted between the slider housing and the inner bracket.

16. The engine of claim 11 , further comprising a guider mounted to a cylinder head, wherein the guider guides movements of the slider housings.

17. The engine of claim 16 , wherein
a shaft hole is formed to the guider; and
the eccentric control shaft is rotatably mounted to the shaft hole.

18. The engine of claim 11 , wherein the control portion comprises:
a control gear connected with the eccentric control shaft; and
a control motor engaged with the control gear.

19. The engine of claim 11 , wherein the camshaft and the rotation ring are connected through a connecting pin.

20. The engine of claim 11 , further comprising a spacer disposed to the camshaft for maintaining distances between one cylinder and neighboring cylinder.

Assignees

• Hyundai Motor Co Ltd

Inventors

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

Classifications

• F01L2001/0537

  Double overhead camshafts [DOHC] · CPC title

• F01L13/0026

  by means of an eccentric · CPC title

• F01L1/08

  Shape of cams · CPC title

• F01L2001/0476

  Camshaft bearings · CPC title

• F01L1/053 Primary

  overhead type · CPC title