Vehicle safety device with electronically coded access authorization

US5596317A · kind A · utility

Assignee

• Mercedes-Benz Group AG · DE

Inventors

• Horst Brinkmeyer · Waiblingen, DE
• Bernd Hense · Plochingen, DE
• Michael Daiss · Echterdingen, DE
• Gunter Schwegler · Waiblingen, DE

Key dates

• Filing date: May 24, 1995
• Grant date: Jan 21, 1997
• Expiry date: May 24, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R25/24
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In the new vehicle safety device according to the invention, random code information used to control the release of an electronic drive-away block arrangement consists of a combination of a plurality of partial information generated separately in operationally essential vehicle units which are separated from one another. The partial information is combined in a linking unit connected with these units for total random code information. Even after a code data exchange protocol has been intercepted by an unauthorized person, the latter, because of the structure of the safety device, can operate the vehicle only by replacing all of these units, which renders such unauthorized use by strangers unattractive because of the manipulations and expense required for this purpose.