Electromagnetic frictionally engaged clutch and method for operating the same

US7267214B2 · kind B2 · utility

Assignee

• Valeo Sicherheitssysteme GmbH · DE

Inventors

• Eric Bittner · Birkenfeld, DE
• Thomas Humez · Dachau, DE
• Stephan Schachtl · Birkenfeld, DE
• Holger Zang · Dachau, DE
• Alexander De Jong · Machtenstein, DE

Key dates

• Filing date: May 27, 2003
• Grant date: Sep 11, 2007
• Expiry date: Jul 3, 2023

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05Y2900/546
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

An electromagnetic frictionally engaged clutch for arranging inside a drive train connecting a drive motor and a vehicle door or flap. The arrangement ensures that the vehicle door is securely held in each intermediate position, when the clutch is in an idle state, while maintaining the possibility of a manual emergency actuation of the vehicle door. The rotor includes at least one permanent magnet in addition to the electric coil, such that when a current does not pass through the coil, the armature disk is pressed against the friction lining of the rotor, with a force which is strong enough for the vehicle door or vehicle flap to securely remain in position occupied when the clutch is an idle state, and for the friction engagement between the armature disk and the friction lining to be overcome when the vehicle door or vehicle flap is subsequently manually actuated.