Keyless security entry control method for motor vehicles

US6437683B1 · kind B1 · utility

Assignee

• Leopold KOSTAL GmbH & Co. KG · DE

Inventors

• Dirk Wolf · Dortmund, DE
• Peter Lunova · Iserlohn, DE

Key dates

• Filing date: Dec 30, 1999
• Grant date: Aug 20, 2002
• Expiry date: Dec 30, 2019

Classification

• Technology area (CPC G): Physics
• CPC primary: G07C2209/63
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A keyless security entry control method and system for motor vehicles includes transmitting respective coded signals from at least two transmitters. The transmitted coded signals overlap within the motor vehicle and are separated outside of the motor vehicle. The coded signals are then received from the at least two transmitters with an identification (ID) transmitter. The position of the ID transmitter with respect to the motor vehicle is then determined from the received coded signals. The position of the ID transmitter is determined to be inside of the motor vehicle if the ID transmitter receives at least two coded signals and is determined to be outside of the motor vehicle if the ID transmitter receives only one coded signal. An action signal indicative of an action to be performed is transmitted from a transceiver device. In response to the ID transmitter receiving the action signal it is determined whether the position of the ID transmitter enables the ID transmitter to perform the action. If the position of the ID transmitter enables the ID transmitter to perform the action then a response signal is transmitted from the ID transmitter. The transceiver device then performs t…