Connecting rod for an internal combustion engine with variable compression

Patent metadata

Field	Value
Publication number	US-10801402-B2
Application number	US-201815979805-A
Country	US
Kind code	B2
Filing date	May 15, 2018
Priority date	May 15, 2017
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A connecting rod for a variable compression internal combustion engine, the connecting rod comprising: at least one hydraulic chamber configured in a connecting rod body, wherein the at least one hydraulic chamber is connectable by a check valve with a bearing shell of the connecting rod or with a tank, wherein the check valve includes a closure element and a valve seat, wherein the closure element contacts the valve seat in a blocking position of the closure element and blocks a fluid path, and wherein the closure element is arranged in a bore hole of the connecting rod body and the valve seat is introduced into the connecting rod body.

First claim

What is claimed is:

1. A connecting rod for a variable compression internal combustion engine, the connecting rod comprising:
two hydraulic chambers configured in a connecting rod body,
wherein the two hydraulic chambers are respectively connectable by check valves with a bearing shell of the connecting rod or with a tank,
wherein the check valves respectively include closure elements and valve seats,
wherein the closure elements respectively contact the valve seat in blocking positions of the closure elements and block a fluid path,
wherein the closure elements are respectively arranged in bore holes of the connecting rod body and the valve seats are fabricated in the connecting rod body
wherein the valve seats are respectively integrally formed in one piece with the connecting rod body from tapered interior surfaces of the connecting rod body and the closure elements are respectively supported on the tapered interior surfaces of the connecting rod body that form the valve seats,
wherein axes of the valve seats that are integrally formed in one piece with the connecting rod body respectively intersect with a longitudinal axis of the connecting rod body, and
wherein the valve seats that are integrally formed in one piece with the connecting rod body are arranged at different longitudinal positions relative to the longitudinal axis of the connecting rod body.

2. The connecting rod according to claim 1 , wherein the bore holes are respectively directly adjacent to the hydraulic chambers.

3. The connecting rod according to claim 1 , wherein the closure elements are respectively configured as balls and the valve seats are respectively at least partially provided as concave bases of the bore holes.

4. The connecting rod according to claim 2 , wherein the closure elements are respectively configured as plates.

5. The connecting rod according to claim 1 , wherein the closure elements have smaller diameters than the bore holes.

6. The connecting rod according to claim 1 , wherein the closure elements respectively include one or plural overflow channels.

7. The connecting rod according to claim 1 , wherein the closure elements are supported in inserts that are arranged in the bore holes, and wherein the inserts include flow recesses.

8. The connecting rod according to claim 1 , wherein stroke limiting devices are arranged in the connecting rod body, and wherein the stroke limiting devices respectively limit strokes of the closure elements in the bore holes.

9. The connecting rod according to claim 8 , wherein cylindrical pins are provided as the stroke limiting devices and impressed into the connecting rod body.

10. A variable compression internal combustion engine, comprising: at least one connecting rod according to claim 1 .

11. The connecting rod according to claim 1 , wherein the longitudinal axis of the connecting rod body intersects one of the two hydraulic chambers.

12. The connecting rod according to claim 1 , wherein an axis of one of the check valves intersects with a switch valve.

13. The connecting rod according to claim 1 , wherein an axis of one of the check valves intersects with the longitudinal axis of the connecting rod above a bearing surface of the bearing shell of the connecting rod and an axis of another of the check valves intersects with the longitudinal axis of the connecting rod below a bearing surface of the bearing shell of the connecting rod.

Assignees

• ECO Holding 1 GmbH

Inventors

• Mudra Alexander
• Schulze Dietmar

Classifications

• F16K15/023

  the valve member consisting only of a predominantly disc-shaped flat element · CPC title

• F16K15/02

  with guided rigid valve members · CPC title

• F02B75/045 Primary

  by means of a variable connecting rod length · CPC title

• F16K15/04

  shaped as balls · CPC title