Continuous variable valve lift apparatus and engine provided with the same and varying valve lift according to operation conditions of engine

Patent metadata

Field	Value
Publication number	US-10634015-B2
Application number	US-201514955290-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Sep 21, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A continuously variable valve lift apparatus may include a camshaft, a cam portion on which two cams are formed and on which a rotation member is formed between the cams, a slider housing into which the rotation member is rotatably inserted, and rotatable around a pivot shaft, a control portion configured to selectively change a position of the slider housing, an output portion contacting the cams, rotatable around the pivot shaft and on which a valve shoe is formed, and a valve device configured to be driven by the valve shoe.

First claim

What is claimed is:

1. A continuously variable valve lift apparatus comprising:
a camshaft;
a cam portion on which two cams are formed and on which a rotation member is formed between the two cams;
a slider housing into which the rotation member is rotatably inserted, and rotatable around a pivot shaft;
a control portion configured to selectively change a position of the slider housing;
an output portion contacting the two cams, rotatable around the pivot shaft and on which a valve shoe is formed; and
a valve device configured to be driven by the valve shoe.

2. The continuously variable valve lift apparatus of claim 1 , wherein the rotation member and the two cams of the cam portion are integrally formed.

3. The continuously variable valve lift apparatus of claim 1 ,
wherein a camshaft hole is formed on the camshafts,
wherein a pin hole is formed on the cam portion, and
wherein the continuously variable valve lift apparatus further comprises:
a pin slider rotatably disposed within the pin hole and on which a slider hole is formed; and

a connecting pin connected to the camshaft hole and slidably inserted into the slider hole.

4. The continuously variable valve lift apparatus of claim 1 , further comprising a bearing inserted between the rotation member and the slider housing.

5. The continuously variable valve lift apparatus of claim 1 , wherein:
the output portion is disposed as a pair; and
the valve device is disposed as a pair and each valve device comprises a swing arm roller contacting each valve shoe.

6. The continuously variable valve lift apparatus of claim 5 , wherein the output portion comprises an output roller contacting each cam of the two cams.

7. The continuously variable valve lift apparatus of claim 1 , wherein the control portion comprises an eccentric shaft connected to the slider housing.

8. An engine comprising:
a camshaft;
a cam portion on which two cams are formed and on which a rotation member is formed between the two cams;
a slider housing into which the rotation member is rotatably inserted, and rotatable around a pivot shaft;
a control portion configured to selectively change a position of the slider housing;
an output portion contacting the two cams, rotatable around the pivot shaft and on which a valve shoe is formed; and
a valve device configured to be driven by the valve shoe.

9. The engine of claim 8 , wherein the rotation member and the two cams of the cam portion are integrally formed.

10. The engine of claim 8 , wherein:
a camshaft hole is formed on the camshaft; and
a pin hole is formed on the cam portion,
wherein the continuously variable valve lift apparatus further comprises:
a pin slider rotatably disposed within the pin hole and on which a slider hole is formed; and

a connecting pin connected to the camshaft hole and slidably inserted into the slider hole.

11. The engine of claim 8 , further comprising a bearing inserted between the rotation member and the slider housing.

12. The engine of claim 8 , wherein:
the output portion is disposed as a pair; and
the valve device is disposed as a pair and each valve device comprises a swing arm roller contacting each valve shoe.

13. The engine of claim 12 , wherein the output portion comprises an output roller contacting each cam of the two cams.

14. The engine of claim 8 , wherein the control portion comprises an eccentric shaft connected to the slider housing.

Assignees

• Hyundai Motor Co Ltd

Inventors

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

Classifications

• F01L1/2405

  by means of a hydraulic adjusting device located between the cylinder head and rocker arm · CPC title

• F01L2305/00

  Valve arrangements comprising rollers · CPC title

• F01L13/0063

  by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot · CPC title

• F01L13/0026

  by means of an eccentric · CPC title

• F01L1/053

  overhead type · CPC title