Locking system for a motor vehicle

US6963794B2 · kind B2 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Michael Geber · Bad Urach, DE
• Uwe Hipp · Sigmaringen, DE
• Johannes Mattes · Mühlheim an der Donau, DE
• Karl Mueller · Gammertingen, DE
• Andreas Pohlmann · Eschborn, DE
• Matthias Reinhardt · Winnenden, DE
• Markus Ruther · Esslingen am Neckar, DE
• Dietmar Weisser · Tuttlingen, DE

Key dates

• Filing date: Jul 22, 2004
• Grant date: Nov 8, 2005
• Expiry date: Jul 22, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R25/406
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A system for automatic access or driving authorization for a motor vehicle includes a first device in the form of a control device having at least two states for engaging and disengaging vehicle door locks, an immobilizer, or the like. An associated second device is provided in the form of an electronic key, an ID transmitter, a chip card or the like. Both devices have means for transmitting or receiving signals, including a coded operating signal for authenticating the second device, so that a change in the state of the first device can be implemented when the second device is authorized. Before the second device is first activated, it is in a sleep state in which operation-independent function is not permitted and energy consumption is reduced. During a first operator-dependent authentication, the second device is changed over from the sleep state into a standby state in which an operation-independent function is at least partially made possible.