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Portable identification transmitter for passive entry systems of motor vehicles

A transmitter and motor vehicle technology, applied in anti-theft vehicle accessories, record carriers used by machines, individual input/output port registers, etc., can solve the problems of battery discharge, expensive, complex wake-up mechanism, etc.

Inactive Publication Date: 2017-04-26
HUF HULSBECK & FURST GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially if the ID transmitter is stored unused for a long period of time after it has been produced and before it is delivered and connected to the motor vehicle, it can happen that the battery is severely discharged when the ID transmitter is delivered
[0010] Furthermore, such a wake-up mechanism that sensitively detects when the ID transmitter should be used and switches it between the armed state and the active state accordingly is complex, expensive, or unreliable

Method used

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  • Portable identification transmitter for passive entry systems of motor vehicles

Examples

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Embodiment Construction

[0037] figure 1 A schematic diagram of a portable identification transmitter 1 for a passive entry system of a motor vehicle according to the invention is shown. Furthermore, the shown ID transmitter performs, in addition to the usage detection according to the invention, further measures for energy saving, which are described in detail in a further application of the applicant.

[0038] Various circuit components as well as a supply battery 3 are accommodated in the housing 2 . The circuit arrangement comprises a microcontroller 4 comprising usual components such as a microprocessor, non-volatile memory for program and configuration data, volatile memory (RAM) for data storage and various inputs and Output interface circuits and internal bus systems that interface with these components. An RF transmit and receive circuit 5 is provided for bidirectional communication with the control unit on the motor vehicle side, which is connected to the input / output port of the microcont...

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Abstract

The transmitter (1) has a supply battery (3) and a microcontroller (4) provided in a housing (2), and a high frequency (HF) transmitting and receiving circuits (5) controllable by the microcontroller for communication with a motor car-side control device. An input of the microcontroller is utilized as an activation input whose external contact terminal (12) is switched as a capacitive electrode without potential requirement. Input signals are evaluable at the activation input in the microcontroller in order to detect load changes on the contact terminal as an alarm. An independent claim is also included for a method for energy-saving operating of a portable identification transmitter.

Description

technical field [0001] The invention relates to a portable identification transmitter for a passive entry system of a motor vehicle, which has a power supply battery in a housing, a microcontroller and a micro-controller for communicating with a control device on the The HF transmitter and receiver circuit controlled by the controller. Background technique [0002] This type of portable identification transmitter is also known as an electronic key or ID transmitter, and it is used to enable the owner or the carrier of the identification transmitter to enter or lock the motor vehicle without the user actively To operate the input button of the identification transmitter. The operator only needs to carry the identification transmitter (for example, put it into clothing or a carrying pocket). [0003] This feature has been described as "passive keyless entry" or "keyless entry." In this "passive keyless entry function", in contrast to conventional remote control, no active o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07C9/00B60R25/24
CPCG06K19/0705G07C9/00309G07C2009/0038
Inventor 席史特格曼·贝恩德齐勒·鲍里斯
Owner HUF HULSBECK & FURST GMBH & CO KG
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