Camshaft adjuster having a hydraulic chamber sealing element that can be switched to and fro to achieve hydraulic freewheelingt part

US9970335B2 · kind B2 · utility

Assignee

• Schaeffler Technologies AG & Co. KG · DE

Inventors

• Olaf Boese · Nuremberg, DE
• Jochen Thielen · Nuremberg, DE

Key dates

• Filing date: Jan 21, 2015
• Grant date: May 15, 2018
• Expiry date: Feb 5, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2001/34479
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A camshaft adjuster for an internal combustion engine of a motor vehicle, having a stator and a rotor accommodated inside the stator such that the rotor can rotate relative to said stator, wherein the rotor has at least one rotor vane, which extends in the radial direction towards an inner wall of the stator and forms a first hydraulic chamber and a second hydraulic chamber between the stator and the rotor, wherein a connection gap remains between a rotor vane end face and the inner wall of the stator and fluid-connecting the first hydraulic chamber and the second hydraulic chamber. A sealing element is guided in a radially movable manner in the rotor vane end face to and fro between a sealing position, in which the sealing element bears against the inner wall of the stator to seal off the connection gap, and a connecting position, in which the first and second hydraulic chambers are connected to each other through the connecting gap.