CAMSHAFT ADJUSTING ARRANGEMENT

• US 20110120399A1
• Filed: 11/19/2010
• Published: 05/26/2011
• Est. Priority Date: 11/20/2009
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: WEBER, Juergen
• Granted Patent: US 8,763,573 B2
• Time in Patent Office: Days
• US Class Current: 123/90.15
• CPC Class Codes: F01L 1/022 Chain drive
• CPC Class Codes: F01L 1/3442 using hydraulic chambers with variable volume to transmit the rotating force
• CPC Class Codes: F01L 2001/34483 Phaser return springs
• CPC Class Codes: F01L 2303/00 Manufacturing of components used in valve arrangements
• CPC Class Codes: F01L 2820/01 Absolute values

Abstract

A camshaft adjusting arrangement for varying angular position of a camshaft relative to a crankshaft of an internal combustion engine which has a drive element that is driven by the crankshaft and is rotatable in relation to the camshaft, at least two hydraulic chambers, to which a hydraulic fluid can be admitted to set a defined relative rotational position between the drive element and camshaft, formed between the drive element and camshaft, a first component and a second component. The first component has a cylindrical receiving face which receives a cylindrical seating face of the second component. To keep the resulting radial compressive stress between the components within an admissible range, at least one compensating element is arranged in the cylindrical receiving face of the first component and/or in the cylindrical seating face of the second component.

Claims

1. A camshaft adjusting arrangement for varying angular position of a camshaft relative to a crankshaft of an internal combustion engine, the camshaft adjusting arrangement, comprising:

a drive element, which is driven by the crankshaft and is supported so as to be rotatable in relation to the camshaft;

at least two hydraulic chambers, to which a hydraulic fluid can be admitted in order to set a defined relative rotational position between the drive element and the camshaft, being formed between the drive element and the camshaft; and

a first component; and

a second component, the first component having a cylindrical receiving face which is designed to receive a cylindrical seating face of the second component,

wherein in order to reduce a radial compressive stress between the first component and the second component, at least one compensating element is arranged in the cylindrical receiving face of the first component and/or in the cylindrical seating face of the second component.

2. The camshaft adjusting arrangement according to claim 1, wherein the compensating element is a groove-like recess, which extends over a defined angle over a circumference of the first component and/or the second component.

3. The camshaft adjusting arrangement according to claim 2, wherein the angle is between 10°

and 25°

.

4. The camshaft adjusting arrangement according to claim 1, wherein two, three or four compensating elements are arranged over a circumference of the cylindrical receiving face and/or the cylindrical seating face.

5. The camshaft adjusting arrangement according to claim 4, wherein the two, three or four compensating elements are arranged equidistantly over the circumference.

6. The camshaft adjusting arrangement according to claim 2, wherein the groove-like recess is incorporated into the cylindrical receiving face of the first component.

7. The camshaft adjusting arrangement according to claim 2, wherein in an axial section, the groove-like recess has largely radially extending lateral boundaries.

8. The camshaft adjusting arrangement according to claim 7, wherein the largely radially extending lateral boundaries merge via a rounding into a base section of the groove-like recess.

9. The camshaft adjusting arrangement according to claim 1, wherein the first component is a front cover of the drive element.

10. The camshaft adjusting arrangement according to claim 1, wherein the second component is a covering element of the drive element.