# US 10,119,430 B2 · Transmission element for reciprocating piston internal combustion engines

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,119,430 B2
- Document ID: US10119430B2
- Status: Granted
- Kind: B2
- Application number: 15/140,996
- Filed: 2016-04-28
- Published: 2016-12-22
- Granted: 2018-11-06
- Earliest claimed: 2015-06-17
- Assignees: Schaeffler Technologies AG & Co. KG
- Applicants: Schaeffler Technologies AG & Co. KG
- Inventors: Marco Junker; Norbert Geyer
- Web page: https://patentgrep.com/patent/US10119430B2

## CPC

- F01L 1/2411: {by means of a hydraulic adjusting device located between the valve stem and rocker arm}
- F01L 1/181: {Centre pivot rocking arms}
- F01L 1/267: {with means for varying the timing or the lift of the valves}
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

## Abstract

A transmission element in the form of a rocker arm (1) or swinging arm for a reciprocating piston internal combustion engine is provided that can be actuated on one side by a cam of a camshaft and on the other side is in active connection with at least one gas exchange valve directly or via an intermediate arrangement of a valve bridge. The transmission element has a hydraulic valve lash compensation element, also called “HVA”, and the hydraulic valve lash compensation element is arranged at a force transmission end of and attached to the transmission element.

## Claims

### Claim 1

A transmission element comprising a rocker arm for a reciprocating piston internal combustion engine that is actuatable on one side by a cam of a camshaft and on the other side is in active connection with at least one gas exchange valve directly or via an intermediate arrangement of a valve bridge, and a hydraulic valve lash compensation element arranged at a force transmission end of and attached to the rocker arm,
the hydraulic valve lash compensation element includes a plug-in extension with a first sleeve portion defining a first outer diameter, a second sleeve portion defining a second outer diameter that is greater than the first outer diameter, and a radially extending stepped portion connecting the first sleeve portion and the second sleeve portion, the first sleeve portion being attached to the rocker arm, and
a valve piston is slidingly engaged against a radially inner surface of the first sleeve portion of the plug-in extension, and a working piston is slidingly engaged against a radially inner surface of the second sleeve portion of the plug-in extension,
the radially extending stepped portion of the plug-in extension defines a shoulder that abuts directly against an axial surface of the rocker arm, and
a compression spring is arranged within the plug-in extension, and the shoulder of the plug-in extension defines an axial stop surface for the compression spring and the working piston.

### Claim 2 (depends on 1)

The transmission element according to claim 1, wherein the plug-in extension is part of a housing of the hydraulic valve lash compensation element.

### Claim 3 (depends on 2)

The transmission element according to claim 2, wherein the plug-in extension has a hollow construction defining a hollow space that is connected to a pressurized medium line in the rocker arm.

### Claim 4 (depends on 3)

The transmission element according to claim 3, wherein the housing is constructed to receive the working piston.

### Claim 5 (depends on 4)

The transmission element according to claim 4, wherein a leakage gap for ventilation is provided between the working piston or the valve piston installed in the working piston and the housing of the hydraulic valve lash compensation element.

### Claim 6 (depends on 1)

The transmission element according to claim 1, wherein the rocker arm includes a borehole in which the first sleeve portion of the plug-in extension is inserted for attachment of the plug-in extension to the rocker arm, and the borehole defines an inner diameter that is less than the second outer diameter of the second sleeve portion.

### Claim 7 (depends on 1)

The transmission element according to claim 1, wherein the rocker arm includes a borehole in which the first sleeve portion of the plug-in extension is inserted for attachment of the plug-in extension to the rocker arm, and the rocker arm defines a shoulder surrounding the borehole that defines the axial surface of the rocker arm.