Camshaft adjusting device, combustion engine and assembly method

Patent metadata

Field	Value
Publication number	US-9909465-B2
Application number	US-201415106455-A
Country	US
Kind code	B2
Filing date	Nov 12, 2014
Priority date	Dec 20, 2013
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A camshaft adjustment device comprising an electromagnetic actuator ( 3 ) having an armature that can be adjusted axially along an adjustment axis ( 5 ) for actuating a hydraulic valve for camshaft adjustment, and fastening means for fastening the actuator ( 3 ) on an engine element ( 3 ), wherein the fastening means comprise spring means ( 12 ), which tension the actuator ( 3 ) against the engine element ( 2 ) in a securing position ( 13 ), wherein the fastening means have positive-fitting means ( 8 ) as an anti-twist device for preventing a twisting movement of the actuator ( 3 ) in an installation position ( 7 ) relatively to the engine element ( 2 ), which are constructed and arranged in such a manner that the actuator ( 3 ) can be moved to the engine element ( 2 ) by means of a pure translational installation movement and wherein the spring means ( 12 ) in the securing position ( 13 ) bar a de-installation path for a purely translational de-installation movement of the actuator ( 3 ) opposite to the installation movement in such a manner that the same cannot be de-installed oppositely to the purely translational installation direction.

First claim

The invention claimed is:

1. A camshaft adjustment device comprising an electromagnetic actuator ( 3 ) having an armature that is adjustable axially along an adjustment axis ( 5 ) for actuating a hydraulic valve for camshaft adjustment, and fastening means for fastening the actuator ( 3 ) on an engine element ( 2 ), wherein the fastening means comprise spring means ( 12 ), which tension the actuator ( 3 ) against the engine element ( 2 ) in a securing position ( 13 ), wherein the fastening means have positive-fitting means ( 8 ) as an anti-twist device for preventing a twisting movement of the actuator ( 3 ) in an installation position ( 7 ) relatively to the engine element ( 2 ), which are constructed and arranged in such a manner that the actuator ( 3 ) is movable to the engine element ( 2 ) by means of a pure translational installation movement and wherein the spring means ( 12 ) in the securing position ( 13 ) bar a de-installation path for a pure translational de-installation movement of the actuator ( 3 ) opposite to the installation movement in such a manner that the actuator ( 3 ) cannot be de-installed oppositely to a direction of the pure translational installation movement.

2. The camshaft adjustment device according to claim 1 , wherein the actuator ( 3 ) is axially guided during translational installation movement.

3. The camshaft adjustment device according to claim 1 , wherein the positive-fitting means ( 8 ) have at least one positive-fitting element ( 11 ) extending parallel to the adjustment axis ( 5 ) on the actuator ( 3 ), which is accommodated in the installation position ( 7 ) in each case by two counterpart elements ( 15 , 16 ) or counterpart element sections of the engine element ( 2 ) that are spaced around the adjustment axis ( 5 ) in a circumferential direction and extend parallel to the adjustment axis ( 5 ), which counterpart elements or counterpart element sections delimit an installation opening extending parallel to the adjustment axis ( 5 ) and/or wherein the positive-fitting means ( 8 ) have at least one positive-fitting element ( 11 ) extending parallel to the adjustment axis ( 5 ) on the engine element ( 2 ), which is accommodated in the installation position ( 7 ) in each case by two counterpart elements ( 15 , 16 ) or counterpart element sections of the actuator ( 3 ) that are spaced around the adjustment axis ( 5 ) in a circumferential direction and extend parallel to the adjustment axis ( 5 ), which counterpart elements or counterpart element sections delimit an installation opening extending parallel to the adjustment axis ( 5 ).

4. The camshaft adjustment device according to claim 3 , wherein the spring means ( 12 ) in the securing position ( 13 ) either:
penetrate the positive-fitting means ( 8 ) and/or the counterpart elements ( 15 , 16 ) or counterpart element sections, or
at least engage into an accommodation opening of the positive-fitting element ( 11 ) or at least a counterpart element ( 15 , 16 ) or at least one counterpart element section.

5. The camshaft adjustment device according to claim 1 , wherein the spring means ( 12 ) is transitionable into the securing position ( 13 ) in a translational or rotational fixing movement.

6. The camshaft adjustment device according to claim 5 , wherein the translational or rotational fixing movement is executable in a fixing plane extending at an angle to the direction of the pure translational installation movement.

7. The camshaft adjustment device according to claim 1 , wherein the spring means ( 12 ) comprise a spring strip or a spring clip, which is resilient in a direction perpendicular to a longitudinal extent of the spring strip or spring clip and/or wherein two spring strips or spring clips of the spring means ( 12 ) are connected, by means of a connecting section ( 12 ), enabling transition of the spring strips or spring clips into the securing position ( 13 ) in a common fixing movement.

8. The camshaft adjustment device according to claim 1 , wherein, in the installation position ( 7 ) of the actuator ( 3 ), the spring means ( 12 ) is moveable out of a pre-installation position into the securing position ( 13 ).

9. The camshaft adjustment device according to claim 1 , wherein the spring means ( 12 ) have a main spring section ( 19 ) for tensioning the actuator ( 3 ) against the engine element ( 2 ) and an auxiliary spring section ( 20 ) for holding the spring means ( 12 ) in a pre-installation position on the actuator ( 3 ), and wherein the auxiliary spring section ( 20 ) is constructed and/or arranged in such a manner that, in the securing position ( 13 ), the spring means ( 12 ) does not tension the actuator ( 3 ) against the engine element ( 2 ) or tension the actuator ( 3 ) against the engine element ( 2 ) with a smaller spring force than the main spring section ( 19 ).

10. The camshaft adjustment device according to claim 1 , wherein the spring means ( 12 ) have a stop ( 14 ), for delimiting the fixing movement thereof and/or a gripping surface for simplified installation and de-installation.

11. The camshaft adjustment device according to claim 1 , wherein the spring means ( 12 ) have an opening or depression for latching interaction with an elevation ( 23 ) of the actuator ( 3 ) or the engine element ( 2 ).

12. The camshaft adjustment device according to claim 1 , wherein a sealing ring ( 26 ) is accommodated on the actuator ( 3 ), which sealing ring is loaded by force exclusively in axial and radial directions.

13. An internal combustion engine having a camshaft adjustment device ( 1 ) according to claim 1 .

14. An installation method for a camshaft adjustment device ( 1 ) comprising an electromagnetic actuator ( 3 ) having an armature that is adjustable axially along an adjustment axis ( 5 ) for actuating a hydraulic valve for camshaft adjustment, and fastening means for fastening the actuator ( 3 ) on an engine element ( 2 ), wherein the fastening means comprise spring means ( 12 ), which tension the actuator ( 3 ) against the engine element ( 2 ) in a securing position ( 13 ), wherein the fastening means have positive-fitting means ( 8 ) as an anti-twist device for preventing a twisting movement of the actuator ( 3 ) in an installation position ( 7 ) relatively to the engine element ( 2 ), which are constructed and arranged in such a manner that the actuator ( 3 ) is movable to the engine element ( 2 ) by means of a pure translational installation movement and wherein the spring means ( 12 ) in the securing position ( 13 ) bar a de-installation path for a pure translational de-installation movement of the actuator ( 3 ) opposite to the installation movement in such a manner that the actuator ( 3 ) cannot be de-installed oppositely to a direction of the pure translational installation movement, the method comprising the steps of:
transitioning the actuator ( 3 ) into the installation position ( 7 ) on the engine element ( 2 ) in the translational installation movement in which installation position the actuator ( 3 ) is secured by means of the positive-fitting means ( 8 ) against twisting relatively to the engine element ( 2 ), and
transitioning the spring means ( 12 ) into the securing position ( 13 ), in which the spring means ( 12 ) tension the actuator ( 3 ) against the engine element ( 2 ) and at the same time bar the de-installation path opposite to a translational installation path of the actuator ( 3 ) along the adjustment axis ( 5 ) of the armature and secure the actuator ( 3 ) on the engine element ( 2 ) against the translational de-installation movement opposite to the translational installation movement of the actuator ( 3 ).

Assignees

• Eto Magnetic Gmbh

Inventors

• Bender Stefan
• Eckhardt Harald
• Vincon Peter

Classifications

• F01L1/46

  Component parts, details, or accessories, not provided for in preceding subgroups · CPC title

• F01L2820/031

  Electromagnets · CPC title

• F01L2001/3443

  Solenoid driven oil control valves · CPC title

• F01L2001/34483

  Phaser return springs · CPC title

• F01L2001/34433

  Location oil control valves · CPC title