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Access control method for motor vehicles

An automobile and vehicle-side technology, applied in the field of controlling keyless entry into automobiles, which can solve problems such as shortening the demand

Inactive Publication Date: 2013-07-31
HUF HULSBECK & FURST GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there is still a need to further reduce the time for access authorization verification, so that the vehicle-side system can respond to user access faster or provide more time for more reliable verification

Method used

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  • Access control method for motor vehicles
  • Access control method for motor vehicles

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Embodiment Construction

[0025] Such as figure 1 As shown, user 1 wants to access car 2. The user 1 carries the ID transmitter 3 with him, which can be placed in the pocket of the user 1's coat, for example. The vehicle end is provided with a control device 4 . Transmitting coils for sending low-frequency electromagnetic signals are arranged on several positions of the car (the door handle 5 in this embodiment).

[0026] When the vehicle detects that the user 1 approaches the vehicle 2 through the proximity sensor in the handle 5 , the transmitting coil in the door handle 5 will be driven to send a low-frequency wake-up signal 6 to the user. The ID transmitter 3 receives this signal, switches from the standby state to the active state and transmits an identification to the vehicle, using the high-frequency carrier frequency 7 in the process. High frequencies here refer to frequencies of hundreds of mHz, for example 433 mHz or 868 mHz. If, for example, several ID transmitters are able to provide ac...

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Abstract

The invention relates to a method for controlling a keyless access to a motor vehicle. A low-frequency (LF) electromagnetic wake-up signal is transmitted using a first transmitting device on the vehicle side and received using an ID transmitter at a distance from the vehicle. Furthermore, a low-frequency electromagnetic distance determining signal is transmitted by the transmitting device on the vehicle side, said distance determining signal likewise being received using the ID transmitter. At least one field strength determination for the received distance determining signal is carried out in the ID transmitter, a bidirectional high-frequency communication (HF) being carried out between a transmitting and receiving device on the vehicle side and the ID transmitter. The low-frequency signals are received and the bidirectional high-frequency communication is carried out simultaneously by means of a system that is capable of multitasking and is located in the ID transmitter.

Description

technical field [0001] The invention relates to a method of controlling keyless entry into a motor vehicle and a corresponding device. In particular, the invention relates to a method of radio communication between a vehicle-side transmitter and an ID transmitter (radio key) at a distance from the vehicle. Background technique [0002] Electronic locking systems of this type based on radio communication are known from the prior art, for example from DE 43 40 260 A1. These locking systems are used, for example, as door locking systems for access authorization and / or as ignition locking systems, as steering wheel locks, immobilizers or the like. [0003] This type of system is generally called a keyless system, and the keyless entry refers to the so-called keyless entry function. For these devices, the user only needs to carry the ID transmitter with him when accessing the vehicle. Allows or prohibits access to the car after radio communication between the vehicle and the I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C9/00B60R25/24
CPCG07C2209/63G07C2009/00365B60R25/245G07C9/00309B60R25/00
Inventor 皮特·克莱门斯埃德温·加西亚·瓦伦苏拉
Owner HUF HULSBECK & FURST GMBH & CO KG
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