Component of a valve drive of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10006318-B2
Application number	US-201515122757-A
Country	US
Kind code	B2
Filing date	Feb 26, 2015
Priority date	Apr 29, 2014
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A clip for securing a support element to a drag lever in a valve train of an internal combustion engine. The clip includes a first spring limb including an aperture configured to receive a support element of the valve train, a second spring limb including a concave pocket that includes a first bore configured to transmit lubrication oil from a channel of the support element through the second spring limb, and a bracket member connecting the first and second spring limbs.

First claim

The invention claimed is:

1. A valve drive of an internal combustion engine comprising:
a drag lever having a first end with a lower face including a surface for an exchange valve, a second end including a dome-shaped indentation, and a middle section including a cam thrust surface;
a support element including a channel for injection of oil lubrication and extending through the dome-shaped indentation; and
a connection clip configured to fix the drag lever in an articulated manner, wherein the connection clip includes a first and second spring limb connected to each other by a transverse bracket, wherein the first spring limb is in contact with the lower face of the drag lever and includes a recess configured to surround a retaining region underneath a head of the support element, and the second spring limb extends on an upper face of the drag lever and lies on the upper face of the drag lever generally following a contour of the dome-shaped indentation, and includes a first injection oil bore that is in fluid connection with the channel and directed over the second end of the drag lever.

2. The valve drive of an internal combustion engine of claim 1 , wherein the second spring limb of the connection clip includes a second injection oil bore in fluid communication with the channel and is located over the drag lever at the first end.

3. The valve drive of an internal combustion engine of claim 2 , wherein the dome-shaped indentation forms around an upper face of the drag lever as a hemisphere-like material depression, and clings the second spring limb of the connection clip.

4. The valve drive of an internal combustion engine of claim 3 , wherein the first injection oil bore lies in a first quadrant facing the second end, and the second injection oil bore lies in a second quadrant facing the first end of the drag lever.

5. The valve drive of an internal combustion engine of claim 1 , wherein the channel aligns along an axial line of the support element.

6. The valve drive of an internal combustion engine of claim 1 , wherein the transverse bracket of the connection clip is located next to a recess of the middle section of the drag lever at the second end.

7. The valve drive of an internal combustion engine of claim 6 , wherein the connection clip is a US fold-back clip.

8. The valve drive of an internal combustion engine of claim 1 , wherein the first injection oil bore is located transversely to the drag lever in such a manner that an extended axial line of the first injection oil bore does not intersect an extension of an axial line of the support element.

9. A clip for securing a support element to a drag lever in a valve train of an internal combustion engine, the clip comprising:
a first spring limb including an aperture configured to receive a support element of the valve train;
a second spring limb including a concave pocket that includes a first bore configured to transmit lubrication oil from a channel of the support element through the second spring limb; and
a bracket member connecting the first and second spring limbs.

10. The clip of claim 9 , wherein the concave pocket is aligned with the aperture to define a space there between for receiving an end of the support element.

11. The clip of claim 9 , wherein the concave pocket is configured to form around an upper surface of the drag lever.

12. The clip of claim 9 , wherein the first bore is smaller than the concave pocket.

13. The clip of claim 12 , wherein the concave pocket includes a second bore configured to transmit lubrication oil received from a channel of the support element.

14. The clip of claim 9 , wherein the first bore is adjacent an outer surface of the drag lever when the clip is connected to the drag lever.

15. The clip of claim 9 , wherein the concave pocket is above an outlet of the support element and the first spring limb when the clip is connected to the drag lever.

16. The clip of claim 15 , wherein the concave pocket includes an apex that is spaced from the outlet.

17. The clip of claim 16 , wherein the concave pocket further includes a second bore configured to transmit lubrication oil received from the outlet, and wherein the second bore is aligned with the outlet and offset from the apex.

18. A clip for securing a support element to a drag lever in a valve train of an internal combustion engine, the clip comprising:
a first spring limb including an aperture configured to receive the valve train;
a second spring limb including a concave pocket that includes a bore configured to transmit lubrication oil from a channel of the support element through the second spring limb, wherein the bore is located above a planar surface of the second spring limb and is smaller than the channel of the support element; and
a bracket member connecting the first and second spring limbs.

19. The clip of claim 18 , wherein the bore is located above a planar surface of the second spring limb.

20. The clip of claim 19 , wherein the second spring limb and the concave pocket are formed from the planar surface.

Assignees

• Schaeffler Technologies Ag

Inventors

• Sailer Peter
• Schnell Oliver

Classifications

• F01L1/2405

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

• F01L2001/187

  Clips, e.g. for retaining rocker arm on pivot · CPC title

• F01L2810/02

  Lubrication · CPC title

• F01L1/185 Primary

  Overhead end-pivot rocking arms · CPC title

• F01L1/18 Primary

  Rocking arms or levers · CPC title