# US 9,038,583 B2 · Internal combustion engine valve drive arrangement

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- Number: US 9,038,583 B2
- Document ID: US9038583B2
- Status: Granted
- Kind: B2
- Application number: 13/968,910
- Filed: 2013-08-16
- Published: 2014-01-23
- Granted: 2015-05-26
- Earliest claimed: 2011-02-17
- Assignees: Daimler AG
- Applicants: Daimler AG
- Inventors: Thomas Stolk; Alexander Von Gaisberg-Helfenberg; Stephan Zentner
- Web page: https://patentgrep.com/patent/US9038583B2

## CPC

- F02D 13/00: Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F01L 13/0036: {the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction}
- F01L 2001/0473: {Composite camshafts, e.g. with cams or cam sleeve being able to move relative to the inner camshaft or a cam adjusting rod}
- F01L 2013/0052: {with cams provided on an axially slidable sleeve}
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

## Abstract

In an internal combustion engine valve drive arrangement having cam elements which are supported on a camshaft so as to be axially displaceable and having switch gates which are coupled to the cam elements and have gate tracks with track segments and switching segments for displaceing the cam elements, the track segments and the switching segments are formed, at least in part, in partial areas of the switch gates.

## Claims

### Claim 1

An internal combustion engine valve drive arrangement having three axially displaceable cam elements (10, 11, 12) with a switch gate (13), coupled to the cam elements (10, 11, 12), the switch gate (13) including gate tracks (14, 15) with track segments (16, 17, 18, 19) and switching segments (20, 21, 22, 23, 24, 25), formed in three different gate elements (26, 27, 28) and being disposed between two cam elements (10, 11) for displacing the cam elements (10, 11, 12) with the two gate elements (26, 27) disposed adjacent the cam elements (10, 11) being formed integrally with the respective adjacent elements (10, 11), the track segments (16, 17, 18, 19) and the switching segments (20, 22, 23, 25) being formed to extend continuously over the gate elements (26, 27, 28) so that, in a partial area, the guide tracks (14, 15) have a double function providing for an insertion or a removal of a switch pin (31, 32) and for a switching of the displaceable cam elements (10, 11, 12).

### Claim 2 (depends on 1)

The internal combustion engine valve drive arrangement according to claim 1, wherein the track segments (16, 17, 18, 19) include partial areas which have only a radial inclination.

### Claim 3 (depends on 1)

The internal combustion engine valve drive arrangement according to claim 1, wherein the switching segment areas (20, 22, 23, 25) include partial areas which have only an axial inclination.

### Claim 4 (depends on 1)

The internal combustion engine valve drive arrangement according to claim 1, wherein the gate tracks (14, 15) have axial inclinations and radial inclinations in the at least one partial area in which the track segment (16, 17, 18, 19) and the switching segment (20, 22, 23, 25) are designed in one piece.

### Claim 5 (depends on 2)

The internal combustion engine valve drive arrangement according to claim 2, wherein the partial area of each track segment (16, 17, 18, 19) which has only the radial inclination is situated, at least for the most part, on one of the gate elements (26, 27, 28).

### Claim 6 (depends on 1)

The internal combustion engine valve drive arrangement according to claim 1, wherein the switching segment (20, 21, 22, 23, 24, 25) is situated completely on one of the gate elements (26, 27, 28).

### Claim 7 (depends on 1)

The internal combustion engine valve drive arrangement according to claim 1, wherein at least one of the track segments (16, 18) forms a meshing segment, and at least one of the other track segments (17, 19) forms a demeshing segment.