Connecting rod and assembly comprising a piston and a connecting rod

Patent metadata

Field	Value
Publication number	US-10294848-B2
Application number	US-201515327029-A
Country	US
Kind code	B2
Filing date	Jul 17, 2015
Priority date	Jul 18, 2014
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A connecting rod for an internal combustion engine may include a connecting rod shank, a large connecting rod eye, and a small connecting rod eye with a pin bore. An end face of the small connecting rod eye may also include at least one overhang, the overhang running parallel to a central axis of the pin bore over its entire width transverse to the central axis of the pin bore. An edge of the overhang may also run parallel to the central axis of the pin bore.

First claim

The invention claimed is:

1. A connecting rod for an internal combustion engine, comprising:
a connecting rod shank;
a large connecting rod eye; and
a small connecting rod eye with a pin bore;
wherein an end face of the small connecting rod eye has at least one overhang running parallel to a central axis of the pin bore over an entire width of the pin bore transverse to the central axis of the pin bore;
wherein an edge of the at least one overhang runs parallel to the central axis of the pin bore; and
wherein the end face of the small connecting rod eye has a recess running transverse to the central axis of the pin bore and arranged one of symmetrically and asymmetrically to the central axis of the pin bore.

2. The connecting rod as claimed in claim 1 , wherein the at least one overhang includes two opposite overhangs running parallel to the central axis of the pin bore, the edges of the overhangs running parallel to the central axis of the pin bore.

3. The connecting rod as claimed in claim 1 , wherein the small connecting rod eye has at least one concave curvature running directly below an edge parallel to the central axis of the pin bore over the entire width of the pin bore.

4. The connecting rod as claimed in claim 3 , wherein the small connecting rod eye has two concave curvatures running on both sides directly below the edges parallel to the central axis of the pin bore over entire width of the pin bore.

5. The connecting rod as claimed in claim 1 , wherein the end face of the small connecting rod eye has at least one of a bore and a tub-shaped recess.

6. The connecting rod as claimed in claim 5 , wherein the bore is formed within the recess.

7. The connecting rod as claimed in claim 1 , wherein the recess has an opening for the supply of cooling oil to the pin bore.

8. An assembly for an internal combustion chamber, comprising:
a piston including a piston shaft with hub bores;
a connecting rod including a connecting rod shank, a large connecting rod eye and a small connecting rod eye with a pin bore; and
an injection nozzle;
wherein the small connecting rod eye is mounted by a piston bolt accommodated in the hub bores and the pin bore in a piston interior of the piston; and
wherein an end face of the small connecting rod eye has at least one overhang running parallel to a central axis of the pin bore at least on its side facing the injection nozzle over an entire width of the pin bore transverse to the central axis of the pin bore; and
wherein an edge of the at least one overhang runs parallel to the central axis of the pin bore.

9. The assembly as claimed in claim 8 , wherein the at least one overhang includes two opposite overhangs running parallel to the central axis of the pin bore, the edges of the overhangs running parallel to the central axis of the pin bore.

10. The assembly as claimed in claim 8 , wherein the small connecting rod eye has a concave curvature running directly below an edge parallel to the central axis of the pin bore over the entire width of the pin bore at least on a side which is assigned to the injection nozzle.

11. The assembly as claimed in claim 8 , wherein the end face of the small connecting rod eye has at least one of a bore and a tub-shaped recess.

12. The assembly as claimed in claim 8 , wherein the end face of the small connecting rod eye has a recess running transverse to the central axis of the pin bore, arranged one of symmetrically to the central axis and asymmetrically on a side of the small connecting rod eye which faces away from the injection nozzle.

13. The assembly as claimed in claim 8 , wherein the piston has a piston base with a contoured underside and the end face of the small connecting rod eye with the at least one overhang has a contour adapted to the contour of the underside of the piston base.

14. The assembly as claimed in claim 8 , wherein the distance between an underside of a piston crown of the piston and the edge facing away from the injection nozzle is smaller than the distance between the underside of the piston crown and the edge facing the injection nozzle.

15. A connecting rod for an internal combustion engine, comprising:
a connecting rod shank;
a large connecting rod eye; and
a small connecting rod eye with a pin bore;
wherein an end face of the small connecting rod eye has two opposite overhangs running parallel to a central axis of the pin bore over its entire width transverse to the central axis of the pin bore;
wherein an edge of the overhangs runs parallel to the central axis of the pin bore;
wherein the small connecting rod eye has at least one concave curvature running directly below an edge parallel to the central axis of the pin bore over an entire width of the piston bore; and
wherein one of:
the end face of the small connecting rod eye has a tub-shaped recess and a bore formed within the tub-shaped recess; and
the end face of the small connecting rod eye has a recess running transverse to the central axis of the pin bore and arranged one of symmetrically and asymmetrically to the central axis of the pin bore.

16. The connecting rod as claim in claim 15 , wherein the small connecting rod eye has two concave curvatures running on both sides directly below the edges parallel to the central axis of the pin bore over the entire width of the pin bore.

Assignees

• Mahle Int Gmbh

Inventors

• Issler Wolfgang

Classifications

• F16C7/023

  for piston engines, pumps or the like · CPC title

• F16J1/16

  with gudgeon-pin; Gudgeon-pins · CPC title

• F16C9/04

  Connecting-rod bearings; Attachments thereof · CPC title

• F16J1/09

  with means for guiding fluids (F16J1/08 takes precedence) · CPC title

• F01P3/08 Primary

  Cooling of piston exterior only, e.g. by jets · CPC title