CAN (controller area network)-bus automobile-engine IMMO (immobilizer) system and authentication method thereof

A CAN bus, automobile engine technology, applied in the field of CAN bus automobile engine anti-theft system and its certification, can solve the problems of low anti-theft certification efficiency and long certification time, and achieve the effect of increasing the difficulty of cracking, increasing the difficulty and improving the safety.

Inactive Publication Date: 2014-09-10
CHERY AUTOMOBILE CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

There are the following technical problems in the prior art: the traditional anti-theft system uses K line, and is a single anti-theft aut

Method used

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  • CAN (controller area network)-bus automobile-engine IMMO (immobilizer) system and authentication method thereof
  • CAN (controller area network)-bus automobile-engine IMMO (immobilizer) system and authentication method thereof
  • CAN (controller area network)-bus automobile-engine IMMO (immobilizer) system and authentication method thereof

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Embodiment Construction

[0029] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0030] The product in this embodiment is composed of an engine control unit, an anti-theft controller unit, and a key assembly. The key assembly includes a transponder and an anti-theft coil. The transponder and the anti-theft coil form an organic whole to realize wireless communication with the anti-theft controller. The transponder is located inside the car key and is a passive device. The anti-theft coil is installed on the ignition lock cylinder of the vehicle, and is connected to the anti-theft controller through the wiring harness, as the load of the anti-theft controller, it undertakes the energy transfer task of the wireless signal between the anti-theft controller and the transponder. The anti-theft controller is the core component of the entire anti-theft system. It stores th...

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Abstract

The invention relates to a CAN (controller area network)-bus automobile-engine IMMO (immobilizer) system and an authentication method thereof. The CAN-bus automobile-engine IMMO system comprises an engine control unit, an IMMO controller unit and a key assembly, the engine control unit is in communication connection with the IMMO controller unit and is used for verifying authentication algorithm with the IMMO controller unit and controlling whether to start the engine or not, the IMMO control unit in communication connection with the engine control unit stores the authentication algorithm between the key assembly and the engine controller, and is used for transmitting commands and encrypted data in the IMMO system. The key assembly comprises a transponder and an IMMO coil. Transmitting of the IMMO system is realized through a CAN bus, AES128 algorithm is added into the authentication process of the IMMO system, 128-bit encrypted data are used as operators, and cracking difficulty of the IMMO system is increased. By the aid of two IMMO authentication algorithms, the cracking difficulty of the CAN-bus automobile-engine IMMO system is increased as compared with that of the IMMO system with only one authentication algorithm.

Description

technical field [0001] The invention belongs to the field of electronic control of automobile engines, and in particular relates to a CAN bus automobile engine anti-theft system and an authentication method thereof. Background technique [0002] The use of current automobiles has become more and more common, and the anti-theft of vehicles has also become an increasingly important device. Many countries have mandated that vehicles must be equipped with an engine anti-theft function, so it is necessary for vehicle manufacturers to develop an engine anti-theft system device. Due to the low transmission rate of the anti-theft information of the traditional K-line engine and the long time for anti-theft authentication, it has been gradually eliminated by the market. Compared with the traditional K line, the CAN bus improves the transmission rate and reduces the error rate of information. There are the following technical problems in the prior art: the traditional anti-theft sys...

Claims

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Application Information

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IPC IPC(8): B60R25/04B60R25/20B60R25/24
Inventor 韩会贤
Owner CHERY AUTOMOBILE CO LTD
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