# US 9,752,469 B2 · Sliding cam actuator having a seal

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- Number: US 9,752,469 B2
- Document ID: US9752469B2
- Status: Granted
- Kind: B2
- Application number: 14/765,499
- Filed: 2014-01-21
- Published: 2015-12-31
- Granted: 2017-09-05
- Earliest claimed: 2013-02-08
- Assignees: Schaeffler Technologies AG & Co. KG
- Applicants: Schaeffler Technologies AG & Co. KG
- Inventors: Martin Steigerwald; Jens Hoppe
- Web page: https://patentgrep.com/patent/US9752469B2

## CPC

- F01L 9/20: by electric means
- F01L 1/047: Camshafts
- F01L 3/08: Valves guides; Sealing of valve stem, e.g. sealing by lubricant
- 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}
- H01F 7/128: Encapsulating, encasing or sealing
- 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}
- F01L 2820/031: Electromagnets
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A sliding cam actuator for a sliding cam system, including a housing defining a housing interior, and at least one coil former having a winding for generating a magnetic force when current flows, further including a moving pin or control pin extendable out of the housing by the magnetic force or a spring force and designed to dip into a displacement groove of a sliding can. A sealing element sealing off the interior of the housing from the outside is arranged between a component fixed to the housing and a component fixed to the moving pin. A sliding cam system including at least one camshaft, on which at least one sliding cam having a displacement groove is arranged such that the sliding cam can be displaced but is fixed against rotation, and into which sliding cam a moving pin of a sliding cam engages is provided.

## Claims

### Claim 1

A sliding cam actuator for a sliding cam system, the sliding cam actuator comprising:
a housing defining a housing interior;
at least one coil body situated in the housing interior and including a winding for generating a magnetic force when current flows through the winding;
at least one moving pin or contact pin extendable out of the housing by the magnetic force or a spring force, the moving pin or contact pin for dipping into a sliding groove of a sliding cam; and
a seal sealing the housing interior from the outside and situated between a component fixed to the housing and a component fixed to the moving pin or contact pin, wherein the seal is a bellows.

### Claim 2 (depends on 1)

The sliding cam actuator as recited in claim 1 wherein the bellows is made of or includes rubber or metal.

### Claim 3 (depends on 1)

The sliding cam actuator as recited in claim 1 wherein the bellows is an expandable bellows fixedly mounted on the component fixed to the housing as well as the component fixed to the moving or contact pin, and sealing a gap situated between the component fixed to the housing as well as the component fixed to the moving or contact pin.

### Claim 4 (depends on 1)

The sliding cam actuator as recited in claim 1 wherein the component fixed to the housing is the housing or an armature guide, the component fixed to the moving or contact pin being the moving or contact pin or an armature.

### Claim 5 (depends on 4)

The sliding cam actuator as recited in claim 4 wherein the armature or the armature guide is fixedly connected to the moving or contact pin or is an integral part thereof.

### Claim 6 (depends on 1)

A sliding cam system comprising:
at least one camshaft; and
at least one sliding cam situated dispaceably but rotatably fixed on the camshaft and having a sliding groove, the moving or contact pin of the sliding cam actuator as recited in claim 1 engaging into the sliding groove.