CN101439703B

CN101439703B - Engine theftproof system, anti-theft method

Info

Publication number: CN101439703B
Application number: CN200810186255A
Authority: CN
Inventors: 肖晖; 应荣恩; 姜灏; 顾光
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2012-09-05
Anticipated expiration: 2028-12-22
Also published as: CN101439703A

Abstract

The invention discloses an anti-theft system of an engine, an anti-theft method thereof and a car body controller with anti-theft function; wherein, the anti-theft system of the engine comprises a password responder, an anti-theft coil, an anti-theft base station and an anti-theft module; the anti-theft base station has LIN function and is arranged near the anti-theft coil; the anti-theft module comprises an LIN transceiver and an encryption/decryption algorithm module and is integrated in the car body controller. The password responder sends information to the anti-theft base station of the engine by the anti-theft coil, and the base station transfers the information into an LIN signal after receiving the information and sends the LIN signal to the anti-theft module; the LIN transceiver in the anti-theft module receives the information sent by the base station, and the information is decrypted and verified by the encryption/decryption algorithm module. As the anti-theft function of the engine is integrated in the car body controller, electron components such as a master chip, a communication circuit and the like that are used in the anti-theft module of the engine can be used shared with the electron components in the car body controller, thus maintaining the security level and saving the cost.

Description

Engine theftproof system and antitheft control method thereof

Technical field

The invention belongs to vehicle electric field, particularly relate to a kind of new car body controller of integrated engine anti-theft feature, be used for engine anti-theft and body electrical function.

Background technology

Present vehicle major part both domestic and external has all been equipped engine theftproof system and car body controller; General engine theftproof system and car body controller are two cover systems independently; Engine theftproof system generally is divided into password responser, antitheft coil and engine anti-theft controller three parts; Circuit such as main control chip, base station and communication circuit are generally arranged in the engine anti-theft controller, and cost is higher.

Summary of the invention

In order to reduce integral vehicle cost, and guarantee that the safety performance of vehicle becomes higher, has specially developed on the basis that keeps original function anti-theft feature is integrated in the engine theftproof system in the car body controller.Concrete technical scheme is following.

A kind of engine theftproof system comprises password responser, antitheft coil, antitheft base station and anti-theft module, and the antitheft base station has the LIN function, is arranged near the antitheft coil; Anti-theft module comprises LIN transceiver and encrypting and decrypting algoritic module, is integrated in the car body controller.

The invention also discloses the method that adopts above-mentioned engine theftproof system to guard against theft and control, it is characterized in that:

The password responser through the antitheft coil information is issued the engine anti-theft base station, the base station with message pick-up after, be converted into the LIN signal, issue anti-theft module;

LIN transceiver in the anti-theft module receives the information that the base station sends through the LIN line, carries out decryption verification by the encrypting and decrypting algoritic module;

Checking is passed through, and car body controller is set up with engine control module and communicated by letter, and engine control module is carried out decryption verification;

The checking of engine control module is also passed through, and the system verification of whole engine anti-theft is passed through, and can carry out engine ignition.

The invention also discloses the car body controller that is integrated with anti-theft feature.

Through the engine anti-theft function is integrated in the car body controller; Used master chip in the engine anti-theft module; Electronic devices and components such as communication circuit can share with the electronic devices and components in the car body controller, when keeping safe class, provide cost savings.

Description of drawings

Fig. 1: system chart of the present invention;

Fig. 2: key wiring diagram of the present invention;

Fig. 3: control flow chart of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is specifically described.

As shown in Figure 1; The present invention will be integrated in reception in the engine anti-theft controller originally and send the information of password responser and to the work of deciphering of password responser and checking separately; The base station ic PCF7992 of the engine anti-theft that receives password responser information is branched away separately; Be placed near the antenna, and function such as communicate by letter to the decryption verification of password responser information and with engine control module is integrated among the car body controller BCM.

Base station ic adopts PCF7992, and PCF7992 is the integrated function of LIN on the basis of PCF7991.The password responser through the antitheft coil information is issued base station ic PCF7992, chip with message pick-up after, be converted into the LIN signal, issue the anti-theft module of car body controller.

Anti-theft module in the car body controller comprises LIN transceiver and encrypting and decrypting algoritic module; The LIN transceiver receives the information that base station ic sends through the LIN line; Carry out decryption verification by the encrypting and decrypting algoritic module, if the checking between car body controller and the password responser pass through, Body control module will with engine block between set up and communicate by letter; Engine control module also will be carried out decryption verification; If the checking of engine control module is also passed through, the system verification of whole engine anti-theft is passed through, and can carry out engine ignition.

Above control logic and processing need the intervention of engine control module, need equip Body control module simultaneously.Hardware based basis is controlled on program, and the The whole control flow process is as shown in Figure 3.

Claims

1. engine theftproof system; Comprise password responser, antitheft coil, antitheft base station and anti-theft module, it is characterized in that: the antitheft base station has the LIN function, is arranged on separately near the antitheft coil; Receive the information that the password responser sends through the antitheft coil; After the antitheft base station receives information, be converted into the LIN signal, send to anti-theft module; Anti-theft module comprises LIN transceiver and encrypting and decrypting algoritic module; Be integrated in the car body controller, the LIN transceiver in the anti-theft module receives the information that the antitheft base station sends through the LIN line, by the encrypting and decrypting algoritic module information that the LIN transceiver receives is carried out decryption verification; Checking is passed through; Car body controller is set up with engine control module and is communicated by letter, and engine control module is carried out decryption verification, and the checking of engine control module is also passed through; The system verification of whole engine anti-theft is passed through, and can carry out engine ignition.

2. engine theftproof system as claimed in claim 1 is characterized in that: the PCF7992 chip is adopted in the antitheft base station.

3. the method that adopts the described engine theftproof system of claim 1 to guard against theft and control is characterized in that:

The password responser sends to the engine anti-theft base station through the antitheft coil with information, after the antitheft base station reception information, is converted into the LIN signal, issues anti-theft module;

LIN transceiver in the anti-theft module receives the information that the antitheft base station sends through the LIN line, carries out decryption verification by the encrypting and decrypting algoritic module;