Continuous variable valve duration apparatus and engine provided with the same

Patent metadata

Field	Value
Publication number	US-10072536-B2
Application number	US-201615275549-A
Country	US
Kind code	B2
Filing date	Sep 26, 2016
Priority date	Dec 14, 2015
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A continuous variable valve duration apparatus may include: a camshaft; first and second cam portions on which a cam is formed respectively, to which the camshaft is inserted and of which relative phase angles with respect to the camshaft are variable; 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 second inner brackets are rotatably inserted, and on which a control slot is formed; a cam cap rotatably supporting the first and the second cam portions and to which the slider housing is slidably mounted; a control shaft which is parallel to the camshaft and on which a control rod is eccentrically formed; an eccentric plate rotatably connected to the control rod and rotatably inserted into the control slot; and a control portion selectively rotating the control shaft.

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 to the first and second cam portions of which 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 second inner brackets are rotatably inserted, a relative position of the slider housing with respect to the camshaft being variable, and a control slot formed on the slider housing;
a cam cap configured to rotatably support the first and the second cam portions, and the slider housing slidably mounted on the cam cap;
a control shaft parallel to the camshaft, and a control rod eccentrically formed on the control shaft;
an eccentric plate rotatably connected to the control rod and rotatably inserted into the control slot; and
a control portion configured to selectively rotate the control shaft so as to control a position of the slider housing.

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

3. The continuous variable valve duration apparatus of claim 1 , wherein
a cam key is formed on the first and second cam portions, respectively;
a first and a second sliding holes are formed to the first and second inner brackets, respectively;
a cam key pin, on which a cam key slot where the cam key is slidably inserted therein is formed, is rotatably inserted into the each first sliding hole; and
a slider pin includes 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.

4. The continuous variable valve duration apparatus of claim 3 , wherein
a camshaft oil hole is formed in the camshaft along a length direction thereof;
a body oil hole communicated with the camshaft oil hole is formed in the pin body; and
an oil groove communicated with the body oil hole is formed in the pin head.

5. 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 bracket, respectively.

6. The continuous variable valve duration apparatus of claim 1 , further comprising a spacer disposed within the slider housing to inhibit rotations of the first and second inner brackets from being interrupted.

7. 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.

8. The continuous variable valve duration apparatus of claim 7 , further comprising a shaft bearing inserted into the shaft hole and configured to support the control shaft.

9. The continuous variable valve duration apparatus of claim 1 , wherein a cam cap guide configured to guide movement of the slider housing is formed on the cam cap.

10. The continuous variable valve duration apparatus of claim 1 , wherein
the cam is formed to the first and the second cam portions as a pair;
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 in the cam cap.

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

12. The continuous variable valve duration apparatus of claim 1 , wherein
an eccentric plate hole is eccentrically formed in the eccentric plate; and
the control rod is inserted into the eccentric plate 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 of which 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 second inner brackets are rotatably inserted, a relative position of the slider housing with respect to the camshaft being variable, and a control slot formed on the slider housing;
a cam cap configured to rotatably support the first and the second cam portions, and the slider housing slidably mounted on the cam cap;
a control shaft parallel to the camshaft, and a control rod eccentrically formed on the control shaft;
an eccentric plate rotatably connected to the control rod and rotatably inserted into the control slot; and
a control portion configured to selectively rotate the control shaft so as to control a position of the slider housing.

14. The engine of claim 13 , wherein
a cam key is formed on the first and second cam portions, respectively;
a first and a second sliding holes are formed to the first and second inner brackets, respectively;
a cam key pin, on which a cam key slot where the cam key is slidably inserted therein is formed, is rotatably inserted into the each first sliding hole;
a camshaft pin is connected to the camshaft; and
a slider pin, on which a camshaft pin slot where the camshaft pin is slidably inserted therein is formed, is rotatably inserted into the each second sliding hole.

15. The engine of claim 13 , wherein
a cam key is formed on the first and second cam portions, respectively;
a first and a second sliding holes are formed to the first and second inner brackets, respectively;
a cam key pin, on which a cam key slot where the cam key is slidably inserted therein is formed, is rotatably inserted into the each first sliding hole; and
a slider pin includes 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.

16. The engine of claim 15 , wherein
a camshaft oil hole is formed in the camshaft along a length direction thereof;
a body oil hole communicated with the camshaft oil hole is formed in the pin body; and
an oil groove communicated with the body oil hole is formed in the pin head.

17. The engine of claim 13 , wherein a cam cap guide configured to guide movement of the slider housing is formed on the cam cap.

18. The engine of claim 13 , wherein the cam is formed to the first and the second cam portions as a pair;
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 in the cam cap.

19. The engine of claim 13 , wherein the control portion comprises:
a worm wheel connected to the control shaft;
a worm gear engage

Assignees

• Hyundai Motor Co Ltd

Inventors

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

Classifications

• F01L2001/34483

  Phaser return springs · CPC title

• F01L2013/103

  Electric motors · CPC title

• F16H25/10

  with adjustable throw · CPC title

• F01L2001/0476

  Camshaft bearings · CPC title

• F01L1/053 Primary

  overhead type · CPC title