Camshaft adjuster

Patent metadata

Field	Value
Publication number	US-10190448-B2
Application number	US-201515129265-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Apr 4, 2014
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A hydraulic camshaft adjuster of the vane cell type, including a rotor and a stator and including a cover having fastening holes extending all the way through for accommodating fasteners. Via the fasteners the cover is fastened at an end face to the stator. The cover has a locking hole, into which a locking pin accommodated in the rotor can be displaced in an axial direction in order to lock the rotor in relation to the stator. The position of the locking pin in the rotor is pivoted about the axis of rotation by an angle in relation to a fastener when the camshaft adjuster is used as an exhaust adjuster, the position of the locking pin in the rotor is pivoted about the axis of rotation by an angle α″ in relation to a fastener when the camshaft adjuster is used as an intake adjuster, and the position of the locking hole in the cover is pivoted about the axis of rotation by an angle α in relation to the position of a fastening hole, wherein the rotor and the stator are coordinated with each other in such a way that the angles α, α′, and α″ are equal in magnitude and the pivoting directions of the angle α′ and α″ are oppositely directed.

First claim

What is claimed is:

1. A vane cell hydraulic camshaft adjuster comprising:
a rotor and a stator rotatable relative to one another about a rotation axis of the camshaft adjuster;
a cover having through fastening holes for accommodating fastening elements, the cover being alternatively fixable to the front side of the stator via the fastening elements in an outlet adjuster mode and in an inlet adjuster mode, the cover including a radially extending side surface facing axially toward the stator in the outlet adjuster mode and the radially extending side surface facing axially away from the stator in the inlet adjuster mode, the cover having a locking hole; and
a locking pin accommodated in the rotor and displaceable in the axial direction being introducible into the locking hole in order to lock the rotor with respect to the stator, a position of the locking pin in the rotor being pivoted about the rotation axis by an angle α′ in relation to one of the fastening elements when the camshaft adjuster is in the outlet adjuster mode, the position of the locking pin in the rotor being pivoted about the rotation axis by an angle a″ in relation to a fastening element when the camshaft adjuster in the inlet adjuster mode, and the position of the locking hole in the cover being pivoted about the rotation axis by an angle a in relation to the position of one of the fastening holes,
the rotor and the stator being coordinated with one another in such a way that the angles α, α′, and α″ are equal in magnitude and pivot directions of the angles α′ and α″ are oppositely directed.

2. The hydraulic camshaft adjuster as recited in claim 1 wherein the cover has a disk design with two flat side faces oriented orthogonally with respect to the rotation and both designed for a sealing contact with the stator or rotor, the radially extending surface forming one of the flat side faces.

3. The hydraulic camshaft adjuster as recited in claim 2 wherein the disk-design is ring-shaped.

4. The hydraulic camshaft adjuster as recited in claim 1 wherein the cover includes a further radially extending side surface opposite of the radially extending side surface, the radially extending side surface of the cover resting against the stator or the rotor, sealing off vane cells formed between the stator and the rotor in the outlet adjuster mode, the further radially extending side surface of the cover resting against the stator or the rotor, sealing off vane cells formed between the stator and the rotor in the inlet adjuster mode.

5. The hydraulic camshaft adjuster as recited in claim 1 wherein in the outlet adjuster mode, the rotor is adjustable with respect to the stator from a locking position in the clockwise direction, and in the inlet adjuster mode, the rotor is adjustable with respect to the stator from the locking position in the counterclockwise direction.

6. The hydraulic camshaft adjuster as recited in claim 1 wherein the locking hole is a through hole.

7. The hydraulic camshaft adjuster as recited in claim 1 wherein the fastening elements and the fastening holes of the stator in a joining plane between the cover and the stator are provided or arranged axially symmetrically with respect to a vertical axis orthogonally intersecting the rotation axis.

8. The hydraulic camshaft adjuster as recited in claim 1 further comprising a bushing closing the locking hole in a sealing manner and situated in the locking hole.

9. The hydraulic camshaft adjuster as recited in claim 8 wherein the bushing has a U-shaped cross section with a front wall and a circumferential wall adjoining an outer edge of the front wall.

10. The hydraulic camshaft adjuster as recited in claim 1 wherein the fastening elements are screws.

11. The hydraulic camshaft adjuster as recited in claim 10 wherein the screws engage with threads in the fastening holes.

12. The hydraulic camshaft adjuster as recited in claim 1 wherein first and second position markings are provided on the cover and on the stator.

13. The hydraulic camshaft adjuster as recited in claim 1 wherein the fastening holes are through holes.

14. The hydraulic camshaft adjuster as recited in claim 1 wherein the rotor includes a plurality of vanes, the locking pin passing through one of the vanes.

15. The hydraulic camshaft adjuster as recited in claim 1 wherein an outer circumference of the cover includes a first cover groove and a second cover groove circumferentially spaced from the first cover groove, an outer circumference of the stator including a first stator groove and a second stator groove, the first cover groove being aligned with the first stator groove in the outlet adjuster mode and the second cover groove being aligned with the second stator groove in the inlet adjuster mode.

Assignees

• Schaeffler Technologies Ag

Inventors

• Schelter Stefan
• Betz Christoph

Classifications

• F01L2001/34459

  Locking in multiple positions · CPC title

• F01L1/344

  changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear · CPC title

• F01L2001/34469

  Lock movement parallel to camshaft axis · CPC title

• F01C1/34

  having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members · CPC title

• F01L1/047

  Camshafts · CPC title