CN102259636B - Anti-theft method and system for automobiles - Google Patents

Abstract

The invention relates to an anti-theft method for automobiles, which comprises the following steps that: a decryption algorithm and a key which are matched with a random sequence code rule generated by an anti-theft key are preset in an engine controller; the anti-theft key is inserted into an ignition lock, generates a random sequence code, calculates according to the decryption algorithm and the key, and sends the random sequence code and a result sequence code; the engine controller receives the random sequence code and the result sequence code and performs unlocking calculation; the anti-theft key is successfully unlocked when an unlocking calculation result is correct; a decryption algorithm and a key which are matched with an owner identity (ID) and an owner ID decryption sequence code are preset in a power assembly controller; the power assembly controller receives the encrypted owner ID and the encrypted owner ID decryption sequence code and performs decoding operation; a braking system is unlocked after the decoding is successful; and a decoding success command is sent to the engine controller. The anti-theft method and an anti-theft system for the automobiles are used for preventing the theft of vehicles and improving the safety of the vehicles.

Description

Anti-theft method and system for automobiles

technical field

The invention relates to the field of automobiles, in particular to an automobile anti-theft method and system.

Background technique

At present, vehicle anti-theft technology is divided into two categories: mechanical and electronic.

Mechanical anti-theft technology uses a specific mechanical device to lock the steering system of the vehicle, or the fuel supply system and other means to achieve the purpose of anti-theft. This method is relatively direct and simple, but the anti-theft effect is poor.

Electronic anti-theft technology usually adopts electronic key decoding, wireless communication decoding or remote control wireless key to realize anti-theft control by controlling the door, engine start and fuel supply system. This method is more complex than mechanical, and has better anti-theft effect, but a single anti-theft technology will also lose its effect when the key is lost or the password is maliciously stolen.

Especially for heavy-duty commercial vehicles, due to the large vehicle body (long wireless transmission distance) and high reliability requirements, it is particularly important to realize vehicle anti-theft and improve vehicle safety.

Therefore, how to provide an automobile anti-theft method and system to enhance the anti-theft effect of the vehicle and improve the safety of the vehicle is a technical problem to be solved by those skilled in the art.

Contents of the invention

The object of the present invention is to provide an automobile anti-theft method and system, which are used to realize the anti-theft of the vehicle and improve the safety of the vehicle.

In order to solve the above problems, the present invention provides a car anti-theft method, said method comprising:

The decryption algorithm and key that match the random sequence code rules generated by the anti-theft key are preset in the engine controller ECU;

The anti-theft key is inserted into the ignition lock, and the anti-theft key generates a random sequence code according to the random sequence code generation rule, and calculates it according to the above decryption algorithm and key, and the anti-theft key sends the random sequence code and the resulting sequence code together;

The engine controller ECU receives the random sequence code and the result sequence code, and performs unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is successfully unlocked;

The decryption algorithm and key that match the owner's ID and the owner's identity decryption sequence code are preset in the powertrain controller PCU;

The powertrain controller PCU receives the encrypted owner ID and the owner identity decryption sequence code sent by the anti-theft identification card, and performs decoding operations;

After the decoding is successful, unlock the brake system; send a successful decoding command to the engine controller ECU.

Preferably, the powertrain controller PCU receives the encrypted vehicle owner ID and the vehicle owner decryption serial code sent by the anti-theft identification card through the anti-theft identification receiving antenna.

Preferably, the transmission between the anti-theft identity recognition receiving antenna and the anti-theft identity recognition card is carried out through wireless radio frequency.

Preferably, the vehicle owner ID is unique, and the vehicle owner ID corresponds to the vehicle owner identity decryption sequence code.

Preferably, the serial code for decrypting the identity of the vehicle owner is specifically a serial string for decryption.

Preferably, after the decoding is successful, the brake system is unlocked by turning on the brake control mechanism; and a successful decoding command is sent to the engine controller ECU through the CAN bus.

Preferably, after the decoding is successful, the brake system is unlocked; after the step of sending the successful decoding command to the engine controller ECU, it includes:

Carry out the car start procedure.

Preferably, the vehicle startup procedure includes:

Receive the engine ignition command, start the motor, and execute the fuel injection control command.

The present invention also provides an automobile anti-theft system, the system comprising: an engine controller ECU, an anti-theft key, and a powertrain controller PCU;

The engine controller ECU further includes an engine controller storage unit, an engine controller receiving unit and an engine controller decryption unit;

The engine controller storage unit pre-stores a decryption algorithm and a key that match the anti-theft key to generate a random sequence code rule;

The anti-theft key is inserted into the ignition lock, and the anti-theft key generates a random sequence code according to the random sequence code generation rule, and calculates according to the above-mentioned decryption algorithm and the encryption key, and the anti-theft key sends the random sequence code and the result sequence code together;

The engine controller receiving unit receives the random sequence code and the result sequence code, and the engine controller decryption unit performs unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is successfully unlocked;

The powertrain controller PCU further includes a powertrain controller storage unit, a powertrain controller receiving unit and a powertrain controller decryption unit;

The storage unit in the powertrain controller PCU pre-stores a decryption algorithm and a key that match the owner's ID and the owner's identity decryption sequence code;

The receiving unit of the powertrain controller receives the encrypted vehicle owner ID and the vehicle owner decryption sequence code sent by the anti-theft identification card;

The decryption unit of the powertrain controller performs the decoding operation; after the decoding is successful, the brake system is unlocked; and the decoding success command is sent to the engine controller ECU.

Preferably, the powertrain controller receiving unit is specifically an anti-theft identification receiving antenna.

Compared with the prior art, it has the following technical effects:

The car anti-theft method described in the embodiment of the present invention, because the anti-theft key is inserted into the ignition lock, the anti-theft key generates a random sequence code according to the random sequence code generation rule, and calculates according to the above decryption algorithm and the encryption key, and the anti-theft key combines the random sequence code and the result The sequence code is sent together; the engine controller ECU receives the random sequence code and the result sequence code, and performs unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is successfully unlocked; thus realizing a heavy anti-theft of the car. Moreover, the powertrain controller PCU receives the encrypted owner ID and the owner identity decryption sequence code sent by the anti-theft identification card, and performs decoding operations; after successful decoding, the braking system is unlocked; and a successful decoding command is sent to the engine controller ECU; in this way, the double anti-theft of the car is realized.

The automobile anti-theft method described in the embodiment of the present invention can realize double anti-theft control on commercial vehicles and other automobiles, and improve the safety of the vehicles.

Description of drawings

Fig. 1 is the flow chart of automobile anti-theft method described in the embodiment of the present invention;

2 is a schematic diagram of the application of the automobile anti-theft method according to the embodiment of the present invention;

Fig. 3 is a structural diagram of the car anti-theft system according to the embodiment of the present invention.

Detailed ways

The invention provides an automobile anti-theft method and system, which are used to realize the anti-theft of the vehicle and improve the safety of the vehicle.

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, Fig. 1 is a flow chart of the automobile anti-theft method according to the embodiment of the present invention; Fig. 2 is an application schematic diagram of the automobile anti-theft method according to the embodiment of the present invention.

The car anti-theft method described in the embodiment of the present invention, the method includes:

S100. The engine controller ECU presets a decryption algorithm and a key that match the random sequence code rules generated by the anti-theft key.

The algorithm can specifically use AES (Advanced Encryption Standard), but the sequence has a number of bits, such as 128 bits, 64 bits, etc. The key is a serial string, usually 32 bits. The key is an integral part of encryption and decryption.

S200, the anti-theft key is inserted into the ignition lock, the anti-theft key generates a random sequence code according to the random sequence code generation rule, and calculates according to the above decryption algorithm and the encryption key, and the anti-theft key sends the random sequence code and the resulting sequence code together.

S300. The engine controller ECU receives the random sequence code and the result sequence code, and performs unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is successfully unlocked.

S400. A decryption algorithm and a key matching the vehicle owner ID and the vehicle owner decryption sequence code are preset in the powertrain controller PCU.

The algorithm can use AES (Advanced Encryption Standard), but the sequence has digits, such as 128 bits, 64 bits, etc. The key is a serial string, usually 32 bits. The key is an integral part of encryption and decryption. S500. The powertrain controller PCU receives the encrypted vehicle owner ID and the vehicle owner decryption sequence code sent by the anti-theft identification card, and performs a decoding operation.

The vehicle owner identity decryption sequence code may specifically be a sequence string for decryption.

S600. After successful decoding, unlock the brake system; send a successful decoding command to the engine controller ECU.

After the step S600, it may include executing a vehicle starting procedure.

The car anti-theft method described in the embodiment of the present invention, because the anti-theft key is inserted into the ignition lock, the anti-theft key generates a random sequence code according to the random sequence code generation rule, and calculates according to the above decryption algorithm and the encryption key, and the anti-theft key combines the random sequence code and the result Sent together with the serial number. The engine controller ECU receives the random sequence code and the result sequence code, and performs unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is unlocked successfully; thus realizing the first anti-theft of the car. Moreover, the powertrain controller PCU receives the encrypted owner ID and the owner identity decryption sequence code sent by the anti-theft identification card, and performs decoding operations; after successful decoding, the braking system is unlocked; and a successful decoding command is sent to the engine controller ECU; in this way, the double anti-theft of the car is realized.

The automobile anti-theft method described in the embodiment of the present invention can realize double anti-theft control on commercial vehicles and other automobiles, and improve the safety of the vehicles.

Explanation of numbers in Fig. 2: 1 anti-theft key (built-in wireless transmitter), 2 ignition lock, 3 anti-theft key receiving coil, 4 powertrain controller (PCU, Powertrain Control Unit), 5 engine controller (ECU, Electronic Control Unit ), 6 starter motor, 7 fuel injection system, 8 anti-theft identification card, 9 anti-theft identification receiving antenna and 10 brake control mechanism.

CAN bus can be used between the powertrain controller PCU 4 and the engine controller ECU 5 to realize the interaction of control information and commands. In Fig. 2, the solid line indicates the wired connection, and the dotted line adopts the wireless transmission. The receiving coil 3 of the anti-theft key 1 can be fixedly installed in the ignition lock 2 to realize electronic pairing with the anti-theft key 1 . The powertrain controller PCU 4 has the functions of controlling engine torque and speed, and opening/closing of the brake control mechanism.

The automobile anti-theft method described in the embodiment of the present invention comprises the following anti-theft processes:

Anti-theft process 1:

Specifically, the anti-theft key receiving coil 3 can be fixedly installed in the ignition lock 2 to realize electronic pairing with the anti-theft key 1 .

When the anti-theft key 1 is inserted into the ignition lock 2, the electronic chip in the anti-theft key 1 will generate a random sequence code, and calculate the resulting sequence code through the decryption algorithm and the encryption key. A serial code, and unlock calculation through the decryption algorithm. When the unlocking calculation result is confirmed to be correct, it means that the anti-theft key 1 is unlocked successfully. Here, the anti-theft key 1 produces random sequence code rules and the decryption algorithm in the engine controller ECU 5 and the encryption key requirements match.

Anti-theft process 2:

The anti-theft identification card 8 includes the owner's ID and the owner's identity decryption sequence code, which can be received by the anti-theft identification receiving antenna 9 through radio frequency transmission technology, and transmitted to the powertrain controller PCU 4. PCU 4 performs decoding operation after receiving the above information. After successful decoding, on the one hand, the brake system is unlocked by opening the brake control mechanism 10;

Here, there are three requirements for anti-theft identification:

1. The data transmission between the anti-theft identification card 8 and the anti-theft identification receiving antenna 9 is transmitted through radio frequency, and the data transmission is encrypted to ensure the security of data transmission.

2. The car owner ID is unique and corresponds to the car owner decryption serial code.

3. The owner's identity decryption serial code is electronically paired with the decryption algorithm and encryption key in the powertrain controller PCU 4, and it is confidential.

Anti-theft process 3:

After the engine controller ECU 5 has successfully unlocked the anti-theft key 1 and received the PCU4 decryption success command at the same time, it confirms that the system anti-theft is unlocked successfully, and can execute the car starting program.

The starting of the automobile system can specifically be to execute the starting (motor) and fuel injection control commands after receiving the engine ignition command, and the starting is successful.

If the engine control ECU 5 fails to unlock the anti-theft key, or does not receive the successful decryption command from the PCU, the engine cannot be started; after the engine ECU successfully obtains the start command, and at the same time, the powertrain PCU 4 unlocks the brake control mechanism, then After the anti-theft control function is completed, the system can be started, thereby realizing double anti-theft control for commercial vehicles and other vehicles.

Referring to Fig. 3, this figure is a structural diagram of the car anti-theft system according to the embodiment of the present invention.

The automobile anti-theft system described in the embodiment of the present invention, said system includes: engine controller ECU 5, anti-theft key 1, powertrain controller PCU 4.

The engine controller ECU 5 further includes an engine controller storage unit 51, an engine controller receiving unit 52 and an engine controller deciphering unit 53.

The engine controller storage unit 51 pre-stores a decryption algorithm and an encryption key that match the rules for generating random sequence codes by the anti-theft key 1 .

The anti-theft key 1 is inserted into the ignition lock, and the anti-theft key 1 generates a random sequence code according to the random sequence code generation rule, and obtains the resulting sequence code through decryption algorithm and encryption key calculation.

The engine controller receiving unit 52 receives the random sequence code and the result sequence code, and the engine controller decryption unit 53 performs unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is successfully unlocked.

The powertrain controller PCU 4 further includes a powertrain controller storage unit 41, a powertrain controller receiving unit 42 and a powertrain controller decryption unit 43.

The storage unit 41 of the powertrain controller PCU pre-stores a decryption algorithm and a key that match the vehicle owner ID and the vehicle owner decryption sequence code.

The powertrain controller receiving unit 42 receives the encrypted owner identity ID and the owner identity decryption sequence code sent by the anti-theft identification card 8;

The powertrain controller decryption unit 43 performs a decoding operation; after the decoding is successful, the brake control mechanism 10 is unlocked; and a successful decoding command is sent to the engine controller ECU 5.

The powertrain controller receiving unit 42 may specifically be an anti-theft identification receiving antenna (reference number 9 in FIG. 2 ).

The car anti-theft system described in the embodiment of the present invention, since the anti-theft key is inserted into the ignition lock, the anti-theft key generates a random sequence code according to the random sequence code generation rule, and calculates according to the above decryption algorithm and the encryption key, and the anti-theft key sends the random sequence code together ; The engine controller ECU receiving unit 52 receives the random sequence code and the result sequence code, and the engine controller ECU decryption unit 53 carries out unlocking calculation according to the decryption algorithm; when the unlocking calculation result is confirmed to be correct, the anti-theft key is unlocked successfully; Just a heavy anti-theft of the car. And powertrain controller PCU receiving unit 42 receives the encrypted car owner ID and car owner identity decryption serial code that anti-theft identification card sends, carries out decoding operation; After powertrain controller PCU decryption unit 43 decodes successfully, brake The system is unlocked; the successful decoding command is sent to the engine controller ECU; thus, the double anti-theft of the car is realized.

The automobile anti-theft system described in the embodiment of the present invention can realize double anti-theft control on commercial vehicles and other automobiles, and improve the safety of the vehicles.

The above is only the preferred embodiment of the automobile anti-theft method and system of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (10)

1. an automobile anti-theft method, is characterized in that, described method comprises:

In engine controller ECU, set in advance with anti-theft key and produce decipherment algorithm and the secret key that the stochastic sequence code create-rule of stochastic sequence code matches;

Anti-theft key inserts in ignition lock, and anti-theft key produces stochastic sequence code according to stochastic sequence code create-rule, and calculates according to above-mentioned decipherment algorithm and secret key, and anti-theft key sends stochastic sequence code together with result sequence code;

Engine controller ECU receives described stochastic sequence code and result sequence code, according to described decipherment algorithm, carries out release calculating; When release result of calculation is confirmed when correct, anti-theft key release success;

In power assembly controller PCU, set in advance the decipherment algorithm and the secret key that match with car owner's identity ID and car owner's identity decrypted sequences code;

Power assembly controller PCU receives car owner's identity ID and the car owner's identity decrypted sequences code after the encryption that antitheft identification card sends, the computing of decoding;

After successfully decoded, brake system is carried out to release; Send successfully decoded order to engine controller ECU;

When anti-theft key release is successful and described power assembly controller PCU carries out after release described brake system, start automobile.

2. automobile anti-theft method according to claim 1, is characterized in that, described power assembly controller PCU receives car owner's identity ID and the car owner's identity decrypted sequences code after the encryption that antitheft identification card sends by antitheft identification receiving wire.

3. automobile anti-theft method according to claim 2, is characterized in that, between described antitheft identification receiving wire and antitheft identification card, by less radio-frequency, transmits.

4. automobile anti-theft method according to claim 1, is characterized in that, described car owner's identity ID has uniqueness, and described car owner's identity ID is corresponding with car owner's identity decrypted sequences code.

5. automobile anti-theft method according to claim 1, is characterized in that, described car owner's identity decrypted sequences code is specially deciphering sequence string.

6. automobile anti-theft method according to claim 1, is characterized in that, after described successfully decoded, by opening brake control mechanism, brake system is carried out to release; By CAN bus, send successfully decoded order to engine controller ECU.

7. automobile anti-theft method according to claim 1, is characterized in that, after described successfully decoded, brake system is carried out to release; Send after the step of successfully decoded order to engine controller ECU, comprising:

Carry out automobile starting program.

8. automobile anti-theft method according to claim 7, is characterized in that, described automobile starting program comprises:

Receive engine ignition instruction, starter motor, carries out oil spout control command.

9. an automotive theft proof system, is characterized in that, described system comprises: engine controller ECU, anti-theft key, power assembly controller PCU;

Engine controller ECU further comprises engine controller memory cell, engine controller receiving element and engine controller decryption unit;

In described engine controller memory cell pre-stored have with anti-theft key produce decipherment algorithm and the secret key that the stochastic sequence code create-rule of stochastic sequence code matches;

Described anti-theft key inserts in ignition lock, and anti-theft key produces stochastic sequence code according to stochastic sequence code create-rule, and calculates according to above-mentioned decipherment algorithm and secret key, and anti-theft key sends stochastic sequence code together with result sequence code;

Engine controller receiving element receives described stochastic sequence code and result sequence code, and engine controller decryption unit is carried out release calculating according to described decipherment algorithm; When release result of calculation is confirmed when correct, anti-theft key release success;

Power assembly controller PCU further comprises power assembly controller memory cell, power assembly controller receiving element and power assembly controller decryption unit;

Pre-stored in described power assembly controller memory cell have decipherment algorithm and a secret key matching with car owner's identity ID and car owner's identity decrypted sequences code;

Described power assembly controller receiving element receives car owner's identity ID and the car owner's identity decrypted sequences code after the encryption that antitheft identification card sends;

The computing of decoding of power assembly controller decryption unit; After successfully decoded, brake system is carried out to release; Send successfully decoded order to engine controller ECU.

10. automotive theft proof system according to claim 9, is characterized in that, described power assembly controller receiving element is specially antitheft identification receiving wire.

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