Continuous variable valve duration apparatus and engine provided with the same

Patent metadata

Field	Value
Publication number	US-10054017-B2
Application number	US-201615272539-A
Country	US
Kind code	B2
Filing date	Sep 22, 2016
Priority date	Dec 14, 2015
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A continuous variable valve duration apparatus may include: a camshaft; first and second cam portions on which a cam is formed respectively; first and second inner brackets transmitting rotation of the camshaft to the first and second cam portions respectively; a slider housing in which the first and the second inner brackets are rotatably inserted; first and second guiding portions formed on the slider housing; a control shaft parallel to the camshaft; a control rod eccentrically formed on the control shaft; a guide head on which a head guiding portion and a head hole are formed; a cam cap supporting the control shaft; a cam cap guiding portion mounted to the cam cap; and a control portion selectively rotating the control shaft such that the slider housing is moved along the cam cap guiding portion.

First claim

What is claimed is:

1. A continuous variable valve duration apparatus comprising:
a camshaft;
first and second cam portions on which a cam is formed respectively, the camshaft being inserted into the first and second cam portion such that relative phase angles with respect to the camshaft are variable;
first and second inner brackets configured to transmit rotation of the camshaft to the first and second cam portions respectively;
a slider housing in which the first and the second inner brackets are rotatably inserted, wherein a first guiding portion is formed on an upper portion of the slider housing, and a second guiding portion vertical to the first guiding portion is formed on the slider housing;
a control shaft parallel to the camshaft, and a control rod eccentrically formed on the control shaft;
a guide head on which a head guiding portion and a head hole are formed, wherein the head guiding portion is slidably connected to the first guiding portion, and the control rod is rotatable insert into the head hole;
a cam cap configured to support the control shaft;
a cam cap guiding portion mounted to the cam cap and guiding movement of the slider housing; and
a control portion configured to selectively rotate the control shaft such that the slider housing is moved along the cam cap guiding portion.

2. The continuous variable valve duration apparatus of claim 1 , wherein the first guiding portion and the head guiding portion are slidably engaged with a rail shape.

3. The continuous variable valve duration apparatus of claim 1 , wherein a guide rail is formed on the cam cap guiding portion and is engaged with the second guiding portion.

4. The continuous variable valve duration apparatus of claim 1 , wherein a shaft hole in which the control shaft is inserted is formed in the cam cap.

5. The continuous variable valve duration apparatus of claim 4 , further comprising a shaft bearing inserted into the shaft hole and rotatably supporting the control shaft.

6. The continuous variable valve duration apparatus of claim 1 , wherein
the cam is formed on the first and the second cam portions as a pair, and
a cam cap connecting portion is formed between the paired cams of each of the first and second cam portions, and
a cam support configured to rotatably support the cam connecting portion is formed on the cam cap.

7. The continuous variable valve duration apparatus of claim 1 , further comprising:
a cam key formed on the first and second cam portions, respectively;
first and second sliding holes formed in the first and second inner brackets, respectively;
a cam key pin rotatably inserted into the each first sliding hole, wherein a cam key slot is formed in the cam key pin, and the cam key is slidably inserted into the cam key slot;
a camshaft pin connected to the camshaft; and
a slider pin rotatably inserted into the each second sliding hole, wherein a camshaft pin slot is formed in the slider pin, and the camshaft pin is slidably inserted into the camshaft pin slot.

8. The continuous variable valve duration apparatus of claim 1 , further comprising a slider housing bearing disposed between the slider housing and the first and the second inner brackets respectively.

9. The continuous variable valve duration apparatus of claim 8 , further comprising a spacer disposed within the slider housing so as to inhibit rotations of the first and the second inner brackets from being interrupted.

10. The continuous variable valve duration apparatus of claim 1 , wherein the control portion comprises:
a worm wheel connected with the control shaft;
a worm gear engaged with the worm wheel; and
a control motor selectively rotating the worm gear.

11. The continuous variable valve duration apparatus of claim 1 , further comprising:
a cam key formed on the first and second cam portions, respectively;
first and second sliding holes formed in the first and second inner brackets, respectively;
a cam key pin rotatably inserted into the each first sliding hole, wherein a cam key slot is formed in the cam key pin, and the cam key is slidably inserted into the cam key slot; and
a slider pin including a pin body and a pin head integrally formed with the pin body, and
wherein the pin body is slidably inserted into the camshaft, and the pin head is rotatably inserted into the second sliding hole.

12. The continuous variable valve duration apparatus of claim 11 , further comprising:
a camshaft oil hole formed in the camshaft along a length direction thereof;
a body oil hole formed in the pin body and configured to communicate with the camshaft oil hole; and
an oil groove formed in the pin head and configured to communicate with the body oil hole.

13. An engine comprising:
a camshaft;
first and second cam portions on which a cam is formed respectively, the camshaft being inserted to the first and second cam portions such that relative phase angles with respect to the camshaft are variable;
first and second inner brackets configured to transmit rotation of the camshaft to the first and second cam portions respectively;
a slider housing in which the first and the second inner brackets are rotatably inserted, wherein a first guiding portion is formed on an upper portion of the slider housing, and a second guiding portion vertical to the first guiding portion is formed on the slider housing;
a control shaft parallel to the camshaft, and a control rod eccentrically formed on the control shaft;
a guide head on which a head guiding portion and a head hole are formed, wherein the head guiding portion is slidably connected to the first guiding portion, and the control rod is rotatable insert into the head hole;
a cam cap configured to support the control shaft;
a cam cap guiding portion mounted to the cam cap and guiding movement of the slider housing; and
a control portion configured to selectively rotate the control shaft such that the slider housing is moved along the cam cap guiding portion.

14. The engine of claim 13 , wherein the first guiding portion and the head guiding portion are slidably engaged with a rail shape.

15. The engine of claim 13 , wherein a guide rail is formed on the cam cap guiding portion and is engaged with the second guiding portion.

16. The engine of claim 13 , wherein a shaft hole in which the control shaft is inserted is formed in the cam cap.

17. The engine of claim 16 , further comprising a shaft bearing inserted into the shaft hole and rotatably supporting the control shaft.

18. The engine of claim 13 , wherein
the cam is formed on the first and the second cam portions as a pair, and
a cam cap connecting portion is formed between the paired cams of each of the first and second cam portions, and
a cam support for rotatably supporting the cam connecting portion is formed on the cam cap.

19. The engine of claim 13 , further comprising:
a cam key formed on the first and second cam portions, respectively;
first and second sliding holes formed in the first and second inner brackets, respectively;
a cam key pin rotatably inserted into the each first sliding hole, wherein a cam key slot is formed in the cam key pin, and the cam key is slidably inserted into the cam key slot;
a camshaft pin connected to the camshaft; and
a slider pin rotatably inserted into the each second sliding hole, wherein a camshaft pin slot is formed in the slider pin, and the camshaft pin is slidably inserted into the camshaft pin slot.

20. The engine of claim 13 , further comprising:
a cam key fo

Assignees

• Hyundai Motor Co Ltd

Inventors

• Son You Sang
• Kim Woong
• Ha Kyoung Pyo
• Kim Back Sik
• Park Dongheon

Classifications

• F16H1/16

  comprising worm and worm-wheel · CPC title

• F01L1/267

  with means for varying the timing or the lift of the valves · CPC title

• F01M11/02

  Arrangements of lubricant conduits · CPC title

• F01L2001/0475

  Hollow camshafts · CPC title

• F01L1/047

  Camshafts · CPC title