Motor vehicle with a central locking unit and a remote control for its operation

US5898230A · kind A · utility

Assignee

• Kiekert AG · DE

Inventors

• Peter Bartel · Hattingen, DE
• Klaus Kulik · Velbert, DE
• Fred Welskopf · Herne, DE

Key dates

• Filing date: Nov 6, 1997
• Grant date: Apr 27, 1999
• Expiry date: Nov 6, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2209/61
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A central locking system of a motor vehicle is provided with communication between the transmitter of the remote actuation unit and the receiver of the central locking system in a frequency-hopping spread spectrum mode where M channels are used of a total of N channels of the spread spectrum frequency band chosen, for example, an I/S/M band of 433 MHz to 435 MHz. Switching is effected from one channel to another channel of the N channels in accordance with a timing pattern in which the timing interval I.sub.zs is greater than the duration .DELTA.t of the communication protocol.