Device for relative rotational angle adjustment of a cam shaft of an internal combustion engine to a drive wheel

US6742484B2 · kind B2 · utility

Assignees

• Ing. h.c. F. Porsche Aktiengesellschaft · DE
• Hydraulik Ring GmbH, Automobiltechnik · DE

Inventors

• Gerold Sluka · Neckartailfingen, DE
• Edwin Palesch · Lenningen, DE
• Andreas Knecht · Herrenberg, DE
• Wolfgang Stephan · Heidelberg, DE

Key dates

• Filing date: Jun 18, 2001
• Grant date: Jun 1, 2004
• Expiry date: Jun 18, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2102
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

At least one locking device between an interior part and cellular wheel, which is equipped with a movable locking element that acts together with at least one counter-element in a respectively other component of the two components cellular wheel or interior part, causes the interior part to be able to be locked relative to the cellular wheel in at least one final position. The locking and/or unlocking process of the locking element occurs through at least one oil duct that leads to the locking element. Between two pressure chambers in or on the cellular wheel an opening connected with the oil duct is arranged, whose passage to the two pressure chambers is controlled in dependence on the adjusting position of the interior part. This way, the cam shaft adjusting unit can be locked safely.