Automobile body controller with engine burglary-prevention function

Abstract

The invention relates to the technical field of automobile body control and automobile electronic burglary prevention, in particular to an automobile body controller with engine burglary-prevention function. The automobile body controller comprises a micro controller, an automobile body control driving module, a control area network (CAN) communication interface circuit, a low-frequency radio frequency processing circuit, an input signal processing circuit, a certification algorithm module and a K line communication interface circuit, wherein the low-frequency radio frequency processing circuit is used for receiving a low-frequency radio frequency induction signal from a burglary-prevention coil and transmitting the low-frequency radio frequency induction signal to the input signal processing circuit; the input signal processing circuit is used for amplifying, demodulating and decoding the signal as well as dividing the frequency of the signal received by the low-frequency radio frequency processing circuit from the burglary-prevention coil so as to reduce a digital signal and transmit the digital signal to the micro controller; the K line communication interface circuit is connected with a diagnosis instrument through a K line; and the micro controller calls the certification algorithm module to decrypt and verify data in the digital signal obtained by the micro controller from the input signal processing circuit, is communicated with a CAN bus through the CAN communication interface circuit according to a verified result, and transmits a corresponding control signal to an engine control module.

Description

technical field [0001] The invention relates to the technical field of automobile body control and automobile electronic anti-theft, in particular to a body controller with engine anti-theft function. Background technique [0002] At present, the annual sales volume of automobiles in the world has reached more than 60 million, and the number of vehicles has exceeded 900 million. The more vehicles in use, the more cars are stolen, and car theft has become an important social problem. Therefore, anti-theft technology has been listed as the four major issues in the development of automobile technology together with safety, environmental protection and energy saving, and has broad development prospects and market demand. At present, domestic car anti-theft devices are still in their infancy. Accelerating the establishment of an immobilizer product (Immobilizer) platform can promote the formation of laws and regulations on the mandatory provision of car anti-theft devices as soo...

AI Technical Summary

Problems solved by technology

[0008] For example, a long-distance engine electronic anti-theft controller disclosed in the Chinese Utility Model Patent Application Publication No. CN201296228 only lengthens the distance between the low-frequency reading IC and the main control MCU. Although this method achieves long-distance , but it is necessary to increase the wiring harness, such as the reading IC that needs power supply to the anti-theft coil, which is easily interfered by the complex electromagnetic environment in the car, and increases the interference path to the controller

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