Patent ID: 7331318
Filing Date: 2008-02-19
Classification: F01L

Abstract:
1. A camshaft adjuster according to the swivel motor principle, comprising: a rotor and a stator, wherein the stator forms by means of webs together with a blade of the rotor, at least two hydraulic chambers acting in opposition, with an arresting unit comprising a biasing means, a bar and a receiving opening corresponding to the bar for receiving a part of the bar, for arresting the rotor in a position relative to the stator; wherein the bar comprises a first portion, being an advance power transmission portion, which has a first diameter, and a second portion, being a wedging portion, which has a second diameter, wherein the first diameter is larger than the second diameter; the first and second portions being disposed on the bar such that they are located in the receiving opening during the arresting; the receiving opening having a larger diameter than the advance power transmission portion; and wherein the arresting firstly occurs by the advance of the first portion moving into the receiving opening, the first portion being subject to play, and the arresting secondly occurs by the second portion moving further into the receiving opening for wedging engagement to minimize play, whereby a stepped change of power transmission takes place during the arresting.