Vehicle Anti-theft Method and Vehicle Anti-theft System

An vehicle anti-theft method and a vehicle anti-theft system is disclosed. The vehicle anti-theft method is implemented by at least a vehicle electronic anti-theft system, a chassis electronic control unit and an electronic parking brake. The method includes (i) generating, by the chassis electronic control unit, a random number, and sending the random number to the vehicle electronic anti-theft system, (ii) between the chassis electronic control unit and the vehicle electronic anti-theft system, based on the random number and PIN and secret key parameters initially configured in the chassis electronic control unit and the vehicle electronic anti-theft system, performing an anti-theft authentication, and obtaining an anti-theft authentication result, and (iii) based on the anti-theft authentication result, controlling, by the electronic parking brake, whether to unlock wheel calipers.

This application claims priority under 35 U.S.C. § 119 to patent application no. CN 2023 1096 0824,2, filed on Aug. 1, 2023 in China, the disclosure of which is incorporated herein by reference in its entirety.

The present disclosure relates to a vehicle anti-theft technology, particularly relates to a vehicle anti-theft method and a vehicle anti-theft system.

BACKGROUND

In an existing vehicle anti-theft system, a chassis electronic control unit is not included. In addition, during the after-sales vehicle part replacement, there is a problem of illegal part replacement of the chassis electronic control unit. Therefore, there is a certain theft risk and a potential security hole.

SUMMARY

Based on the above problems in the prior art, the present disclosure aims to provide a vehicle anti-theft method and a vehicle anti-theft system which are higher in safety and reliability.

The vehicle anti-theft method in one aspect of the present disclosure is implemented by at least a vehicle electronic anti-theft system, a chassis electronic control unit, and an electronic parking brake; and the method comprises the following steps:a random number generation step, wherein the chassis electronic control unit generates a random number and sends the random number to the vehicle electronic anti-theft system;an anti-theft authentication step, wherein between the chassis electronic control unit and the vehicle electronic anti-theft system, based on the random number and PIN and secret key parameters initially configured in the chassis electronic control unit and the vehicle electronic anti-theft system, an anti-theft authentication is performed, and an anti-theft authentication result is obtained; andan anti-theft control step, wherein the chassis electronic control unit controls whether the electronic parking brake unlocks wheel calipers based on the anti-theft authentication result.

A vehicle anti-theft system in one aspect of the present disclosure at least comprises: a vehicle electronic anti-theft system, a chassis electronic control unit, and an electronic parking brake,wherein the chassis electronic control unit comprises:a first configuration module for initially configuring PIN and secret key parameters;a random number generation module for generating a random number and sending the random number to the vehicle electronic anti-theft system;a first anti-theft authentication module that performs anti-theft authentication actions across the vehicle electronic anti-theft system based on the random number and the PIN and secret key parameters initially configured in the first configuration module, and obtains an anti-theft authentication result; andan anti-theft result output module for outputting the anti-theft authentication result,the vehicle electronic anti-theft system comprises:a second configuration module for initially configuring PIN and secret key parameters;a random number receiving module for receiving the random number from the chassis electronic control unit; anda second anti-theft authentication module that performs anti-theft authentication actions across the chassis electronic control unit based on the random number and the PIN and secret key parameters initially configured in the second configuration module,the electronic parking brake comprises:a first anti-theft result receiving module for receiving the anti-theft authentication result from the chassis electronic control unit; anda first anti-theft control module for controlling whether the electronic parking brake unlocks wheel calipers based on the anti-theft authentication result.

According to the vehicle anti-theft method and the vehicle anti-theft system of the present disclosure, a higher level of anti-theft encryption and security can be achieved by adding the chassis electronic control unit to an existing anti-theft system.

DETAILED DESCRIPTION

Some of the examples of the present disclosure are described below with the aim of providing a basic understanding of the present disclosure. It is not intended to identify the key or decisive elements of the present disclosure or to define the scope to be protected.

For brevity and illustrative purposes, the principles of the present disclosure are mainly described herein with reference to its exemplary examples. However, those skilled in the art will readily recognize that the same principles may be applied equally to lane line detection methods and lane line detection systems for all types of lane line detection, in addition, these same principles may be implemented therein, and any such changes do not deviate from the true spirit and scope of the present patent application.

Also, in the following description, reference is made to the accompanying drawings, which illustrate specific exemplary examples. Electrical, mechanical, logical and structural changes may be made to these examples without departing from the spirit and scope of the present disclosure. Further, although the features of the present disclosure are disclosed in combination with only one of a plurality of implementations/examples, if it may be desirable and/or advantageous for any given or identifiable function, the features may be combined with one or more other features of other implementations/examples. Accordingly, the following description shall not be considered in a limiting sense, and the scope of the present disclosure is defined by the appended Claims and their equivalents.

Terms such as “have” and “comprise” indicate that, in addition to the units (modules) and steps that are directly and explicitly expressed in the Specification and the Claims, the technical solution of the present disclosure does not preclude the cases of other units (modules) and steps that are not directly or explicitly expressed.

FIG.1is a structure schematic diagram of a vehicle anti-theft system according to an embodiment of the present disclosure.

As shown inFIG.1, the vehicle anti-theft system of an embodiment of the present disclosure comprises: a vehicle electronic anti-theft system (IMMO)100, a chassis electronic control unit (Chassis ECU)200, a transmission electronic control unit (Transmission ECU)300, and a powertrain electronic control unit (Powertrain ECU)400.

First, an initial parameter configuration of the vehicle anti-theft system of an embodiment of the present disclosure is illustrated.

As shown inFIG.1, the initial parameter configuration comprises the following steps:A1: the original equipment manufacturer (OEM)900injects VIN information of terminal production line (EOL) equipment into the vehicle electronic anti-theft system100, calculates a corresponding unique PIN, and writes the PIN into the vehicle electronic anti-theft system100through, for example, diagnostic commands; the vehicle electronic anti-theft system100generates corresponding secret key (SK) parameters;A2: a security algorithm is used between the vehicle electronic anti-theft system100and the chassis electronic control unit200for writing the PIN and the SK parameters into the chassis electronic control unit200, so as to complete a configuration of the chassis electronic control unit200;A3: a security algorithm is used between the vehicle electronic anti-theft system100and the transmission electronic control unit300for writing the PIN and the SK parameters into the transmission electronic control unit300, so as to complete a configuration of the transmission electronic control unit300;A4: a security algorithm is used between the vehicle electronic anti-theft system100and the powertrain electronic control unit400for writing the PIN and the SK parameters into the powertrain electronic control unit400, so as to complete a configuration of the powertrain electronic control unit400.

Secondly, a parameter reconfiguration action when the transmission electronic control unit300and the powertrain electronic control unit400are updated is illustrated.

As shown inFIG.1, the parameter reconfiguration action comprises:B1: the chassis electronic control unit200is used as master equipment, a diagnostic access algorithm is used for transmitting the PIN and SK information to the transmission electronic control unit300as slave equipment, thereby completing a parameter reconfiguration of the transmission electronic control unit300;B2: the chassis electronic control unit200is used as master equipment, a diagnostic access algorithm is used for transmitting the PIN and SK information to the powertrain electronic control unit400as slave equipment, thereby completing a parameter reconfiguration of the powertrain electronic control unit400, wherein the order of B1 and B2 is not defined. In addition, the above parameter reconfiguration action generally occurs in, for example, after-sales4S stores.

FIG.2is a schematic diagram illustrating anti-theft actions executed in a vehicle anti-theft system of an embodiment of the present disclosure.

As shown inFIG.2, authentication and anti-theft actions implemented in the vehicle anti-theft system of one embodiment of the present disclosure comprise:C1: vehicle starting;C2: the chassis electronic control unit200checks an initial configuration (checks if PIN and SK parameters are initially configured) and generates a random number, the random number is sent to the vehicle electronic anti-theft system100, and the vehicle electronic anti-theft system100performs a combined calculation of the received random number and the initially configured PIN and SK parameters,
obtains a first anti-theft parameter value, and returns the first anti-theft parameter value to the chassis electronic control unit200;C3: the chassis electronic control unit200calculates to obtain a second anti-theft parameter value based on the initially configured PIN and SK parameters and the generated random number, and judges whether the first anti-theft parameter value and the second anti-theft parameter value returned from the vehicle electronic anti-theft system100are the same; it is considered to be a successful anti-theft authentication (i.e. the authentication result is trusted) if the first anti-theft parameter value and the second anti-theft parameter value are the same, and instructions for unlocking wheels can be sent to calipers501through the electronic parking brake500; and it is considered to be an unsuccessful anti-theft authentication (i.e. the authentication result is not trusted) if the first anti-theft parameter value and the second anti-theft parameter value are not the same, and instructions of not releasing the calipers501to lock the wheels are sent through the electronic parking brake500C4: the chassis electronic control unit200sends the authentication result to the powertrain electronic control unit400and the transmission electronic control unit300through a bus600;C5: if the authentication result is in an untrusted state, the powertrain electronic control unit400limits power output of an engine401and enables a safety limit power transmission function; and if the authentication result is in a trusted state, the previous power is maintained;C6: if the authentication result is in an untrusted state, the transmission electronic control unit300limits power transmission of a transmission301and enables a safety limit power transmission function; and if the authentication result is in a trusted state, the previous transmission is maintained;C7: if the authentication result is in an untrusted state, a T-BOX (Communications Box)700sends an illegal access risk to an application program over the network and sends a prompt to a cell phone of a user; and if the authentication result is in a trusted state, no warn is sent, and the state is safe.

One specific example of the vehicle anti-theft method of the present disclosure is described below.

FIG.3is a flow chart of one specific example of the vehicle anti-theft method of the present disclosure.

As shown inFIG.3, one specific example of the vehicle anti-theft method of the present disclosure primarily comprises the following steps:S1: the power is on;S2: the chassis electronic control unit detects whether it is in an anti-theft mode; if yes, continue to S3; otherwise, skip to S19;S3: the chassis electronic control unit checks an initial configuration, i.e., checks whether PIN and SK parameters have been initially set; if yes, continue to S4; otherwise, skip to S20;S4: the chassis electronic control unit generates a random number;S5: the chassis electronic control unit sends the random number to the vehicle electronic anti-theft system;S6: the vehicle electronic anti-theft system performs anti-theft calculations based on the initially set PIN and SK parameters and the random number received from the chassis electronic control unit;S7: the vehicle electronic anti-theft system obtains the first anti-theft parameter value through the anti-theft calculations;S8: the chassis electronic control unit performs anti-theft calculations based on the PIN and the SK parameters and the random number generated by itself;S9: the chassis electronic control unit obtains the second anti-theft parameter value through the anti-theft calculations;S10: the chassis electronic control unit compares whether the first anti-theft parameter value and the second anti-theft parameter value are the same; if the first anti-theft parameter value and the second anti-theft parameter value are the same, continue to S11; otherwise, skip to S13;S11: the anti-theft authentication is successful;S12: the calipers are pre-released, and parking brakes are pre-unlocked;S13: the unsuccessful number of comparisons of the first anti-theft parameter value and the second anti-theft parameter value is counted to obtain a counting value N; if N<the specified threshold, return to S4; otherwise, continue to S14;S14: if the anti-theft authentication is unsuccessful, continue to conduct S15, and meanwhile continue to conduct S16 and its sub-steps S161-S162, S17 and its sub-steps S171 and S172, S18 and its sub-step S181;S15: the calipers are not released, and an anti-theft alarm (e.g. flashing light, etc.) is sent;S16: the unsuccessful anti-theft authentication result is past to the powertrain electronic control unit;S161: if the powertrain electronic control unit receives the unsuccessful anti-theft authentication result, it means that an untrusted access is received, and a powertrain needs to be limited; S162: the power output of the engine is limited, and the safety limit power transmission function is enabled;S17: the unsuccessful anti-theft authentication result is past to the transmission electronic control unit;S171: if the transmission electronic control unit receives the unsuccessful anti-theft authentication result, it means that an untrusted access is received, and the transmission needs to be limited;S172: the power transmission of the transmission is limited, and the safety limit power transmission function is enabled;S18: the unsuccessful anti-theft authentication result is past to the T-BOX;S181: the T-BOX receives an unsuccessful anti-theft authentication result, it means that an untrusted access is received, and an illegal access risk needs to be sent to the application program over the network;S19: if it is in a non-anti-theft mode, skip to S21;S20: failures of the initial configuration are reported, and skip to S21; S21: end.

Next, a specific configuration of the vehicle anti-theft system of the present disclosure is illustrated.

FIG.4is a specific structure schematic diagram of a vehicle anti-theft system according to an embodiment of the present disclosure.

As shown inFIG.4, the vehicle anti-theft system of the embodiment of the present disclosure comprises: a vehicle electronic anti-theft system100, a chassis electronic control unit200, a transmission electronic control unit300, a powertrain electronic control unit400, and an electronic parking brake500.

The vehicle electronic anti-theft system100comprises:a first configuration module110for initially configuring PIN and secret key parameters;a random number receiving module120for receiving a random number from the chassis electronic control unit; anda first anti-theft authentication module130that performs anti-theft authentication actions across the chassis electronic control unit based on the random number and the PIN and secret key parameters initially configured in the first configuration module,wherein the chassis electronic control unit200comprises:a second configuration module210for initially configuring PIN and secret key parameters;a random number generation module220for generating a random number and sending the random number to the vehicle electronic anti-theft system; anda second anti-theft authentication module230that performs anti-theft authentication actions across the vehicle electronic anti-theft system based on the random number and the PIN and secret key parameters initially configured in the second configuration module, and obtains the anti-theft authentication result; andan anti-theft result output module240for outputting the anti-theft authentication result,wherein the transmission electronic control unit300comprises:a third configuration module310for writing the PIN and the secret key parameters from the vehicle electronic anti-theft system to the transmission electronic control unit;a third anti-theft result receiving module320for receiving the anti-theft authentication result from the chassis electronic control unit; anda third anti-theft control module330for controlling whether the power transmission of the transmission is limited based on the anti-theft authentication result and whether the safety limit power transmission function is enabled,wherein the powertrain electronic control unit400comprises:a fourth configuration module410for writing the PIN and the secret key parameters from the vehicle electronic anti-theft system to the powertrain electronic control unit;a fourth anti-theft result receiving module420for receiving the anti-theft authentication result from the chassis electronic control unit; anda fourth anti-theft control module430for controlling whether the power output of the engine is limited based on the anti-theft authentication result and whether the safety limit power transmission function is enabled,wherein the electronic parking brake500comprises:a first anti-theft result receiving module510for receiving the anti-theft authentication result from the chassis electronic control unit; anda first anti-theft control module520for controlling whether the electronic parking brake unlocks the wheel calipers based on the anti-theft authentication result.

As stated above, the vehicle anti-theft method and the vehicle anti-theft system according to the present disclosure enable third-level anti-theft encryption when a vehicle is started by increasing the anti-theft authentication between the chassis electronic control unit and a vehicle wireless key system. Moreover, in the case of a successful anti-theft authentication, the wheel calipers are pre-unlocked through the parking brake system. In the case of an unsuccessful anti-theft authentication, the chassis electronic control unit enters the non-safety mode and stops the wheels from unlocking and the vehicle from traveling freely through the electronic parking brake. Further, the chassis electronic control unit may also pass the unsuccessful anti-theft authentication result to the powertrain electronic control unit and the transmission electronic control unit, and the unsuccessful anti-theft authentication result may also be transmitted to the user application program through the T-BOX to alert the user about the risk.

On the other hand, the vehicle anti-theft method and the vehicle anti-theft system according to the present disclosure can also solve the problem of illegal changes of the chassis electronic control unit during replacement in different vehicles in the after-sales market, so as to ensure a unique matching attribute between products and the vehicles. Moreover, when a new powertrain electronic control unit and a transmission electronic control unit are replaced, for example in a4S store, PIN and SK information may be learned to other electronic control units based on the initial configuration of the chassis electronic control unit, and a complex reconfiguration by OEM can be avoided.

The above descriptions are only specific embodiments of the present application, and the protection scope of the present application is not limited thereto. Those skilled in the art may contemplate other feasible modifications or substitutions based on the technical scope disclosed in the present application, and all such modifications or substitutions fall within the scope of protection of the present application. Without conflicts, the embodiments of the present application and the features in the embodiments may also be combined. The scope of protection of the present application is subject to the scope of protection of the Claims.