A bluetooth key based vehicle entry and start control method and system

Abstract

The application discloses a vehicle entry and starting control method and system based on a Bluetooth key, and the method is applied to a body control module integrated with a keyless entry and starting function, and the method comprises the following steps: in response to receiving a control signal that a door handle micro switch is pressed down or a brake signal that a brake pedal is stepped on, a query request of the Bluetooth key is sent to a T-BOX of the vehicle; in response to receiving Bluetooth key information returned by the T-BOX, it is judged whether the Bluetooth key meets the conditions of keyless entry or keyless starting; if yes, an unlocking instruction is sent to a door lock corresponding to the door handle micro switch, and a flickering instruction is sent to a turn signal; or in response to receiving a trigger signal of a starting switch, an engine starting signal is sent to an electronic control unit; wherein the low-frequency driving chip and the low-frequency antenna are not included in the body control module. The low-frequency driving chip and the low-frequency antenna of the PEPS system are cancelled, and the PEPS function is integrated into the BCM, so that the development difficulty and the hardware requirement of the PEPS system are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent control of vehicles, and more particularly to a vehicle entry and start control method and system based on a Bluetooth key. BACKGROUND

[0002] At present, cars have entered thousands of households. With the gradual configuration of Bluetooth keys on cars, it has brought great convenience to people's life, such as realizing no-sense entry, no-sense leaving, digital key sharing, and mobile phone remote control operation. The premise of realizing the above comfortable functions is that the vehicle needs to have the PEPS (Passive Entry Passive Start, no-key entry and start) system function independent of the Bluetooth key. The PEPS controller is the control unit of the vehicle no-key entry (PE) and one-key start (PS), which can realize the switching of the vehicle power state IGN-ACC-OFF and the vehicle no-key entry, and also can initiate a start request to start the vehicle, and can also disconnect the IG1 power to realize the vehicle shutdown function. The vehicle can be configured with a one-key start function. The PS (one-key start) configuration function controls the ACC relay and IG1 relay configured by the vehicle through the PS controller (or PEPS controller), and also searches for a legal key in the vehicle through the low-frequency antenna configured by itself. After confirming that there is a legal key in the vehicle, the vehicle can be started by sending a start request.

[0003] However, since the PEPS system needs additional hardware support (including low-frequency drive chip, low-frequency receiving chip, low-frequency antenna, intelligent key, etc.), the cost is high, which hinders the landing application of the Bluetooth key. SUMMARY

[0004] The present application provides a vehicle entry and start control method and system based on a Bluetooth key, which cancels the low-frequency drive chip and low-frequency antenna in the existing PEPS system, and integrates the PEPS function into the BCM. After integration, the PEPS module and the BCM module share the input and output interfaces, which reduces the overall development difficulty and hardware requirements of the PEPS system, thereby reducing the integration difficulty and overall cost of the PEPS controller and the BCM, and providing a good foundation for the landing application of the Bluetooth key.

[0005] The present application provides a vehicle entry and start control method based on a Bluetooth key, which is applied to a body control module integrated with a no-key entry and start function, comprising:

[0006] In response to receiving a control signal that the door handle micro switch is pressed down or a brake signal that the brake pedal is stepped on, a query request of the Bluetooth key is sent to the T-BOX of the vehicle, and the query request includes the authentication state of the Bluetooth key and the location information of the Bluetooth key;

[0007] determine whether the Bluetooth key meets the conditions of the keyless entry or the keyless start in response to receiving the Bluetooth key information returned by the T-BOX;

[0008] If yes, send an unlocking instruction to the door lock corresponding to the door handle micro switch and send a flickering instruction to the turn signal to realize the keyless entry operation; or send an engine start signal to the electronic control unit in response to receiving the trigger signal of the start switch to make the electronic control unit control the engine start to realize the keyless start operation;

[0009] The low-frequency driving chip and the low-frequency antenna are not included in the body control module.

[0010] Preferably, the backup antenna driving chip and the backup antenna are not included in the body control module.

[0011] Preferably, in the state that the Bluetooth key is not connected or not successfully authenticated, if a trigger signal of any key of a legal remote key is received within a preset time after receiving a brake signal that the brake pedal is stepped on, an engine start signal is sent to the electronic control unit in response to receiving the trigger signal of the start switch to make the electronic control unit control the engine start to realize the keyless start operation.

[0012] The legal remote key has a remote door opening and closing function.

[0013] Preferably, the Bluetooth key information sent by the T-BOX includes CRC check information, message count check information, and encryption information of the returned Bluetooth key data.

[0014] Preferably, the T-BOX uses a complement algorithm to encrypt the returned Bluetooth key data.

[0015] The application also provides a vehicle entry and start control system based on a Bluetooth key, which comprises a T-BOX of a vehicle, a body control module integrated with a keyless entry and start function, a door lock, a turn signal, and an electronic control unit.

[0016] The T-BOX is used to receive a query request of the Bluetooth key sent by the body control module and return Bluetooth key information to the body control module, and the query request comprises an authentication state of the Bluetooth key and position information of the Bluetooth key.

[0017] The low-frequency driving chip and the low-frequency antenna are not included in the body control module; the body control module comprises a receiving module, a request sending module, a judgment module, and an instruction sending module.

[0018] The receiving module is used to receive a control signal that the door handle micro switch is pressed, a brake signal that the brake pedal is stepped on, and Bluetooth key information returned by the T-BOX.

[0019] The request sending module is configured to send a query request to the T-BOX.

[0020] The judging module is configured to judge whether the Bluetooth key meets the conditions of keyless entry or keyless start.

[0021] The instruction sending module is configured to send an unlocking instruction to the door lock corresponding to the door handle micro switch and a flashing instruction to the turn signal lamp to realize the keyless entry operation when the conditions of keyless entry are met, or to send an engine start signal to the electronic control unit to make the electronic control unit control the engine start to realize the keyless start operation in response to receiving the trigger signal of the start switch when the conditions of keyless start are met.

[0022] Preferably, the backup antenna driving chip and the backup antenna are not included in the body control module.

[0023] Preferably, the receiving module is further configured to, in a state where the Bluetooth key is not connected or not successfully authenticated, receive a trigger signal of any key on a legal remote key after receiving a brake signal that the brake pedal is stepped on.

[0024] Preferably, the legal remote key has a remote door switch function.

[0025] Preferably, the T-BOX includes an encryption module configured to encrypt the returned Bluetooth key data.

[0026] The Bluetooth key information sent by the T-BOX includes CRC check information, message count check information, and encryption information of the returned Bluetooth key data.

[0027] Preferably, the encryption module is configured to encrypt the returned Bluetooth key data by using a complement algorithm.

[0028] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0030] Figure 1 is a structural schematic diagram of a PEPS system of the prior art;

[0031] Figure 2 is a structural schematic diagram of a Bluetooth key system;

[0032] Figure 3 is a schematic diagram of the principle of cooperation between the PEPS system of the prior art and the Bluetooth key on the mobile phone APP to realize the PE and PS functions;

[0033] Figure 4 The vehicle end (including integrated body control module BCM) structure schematic diagram of the Bluetooth key system provided for the present application;

[0034] Figure 5 The principle schematic diagram of the integrated BCM and Bluetooth key on the mobile phone APP cooperating to realize PE and PS functions provided for the present application;

[0035] Figure 6 The flow chart of the vehicle entry and start control method based on the Bluetooth key provided for the present application;

[0036] Figure 7 The structure diagram of the vehicle entry and start control system based on the Bluetooth key provided for the present application. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0038] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application, its application, or uses.

[0039] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, techniques, methods, and devices should be considered part of the description of the present application.

[0040] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0041] The present application provides a vehicle entry and start control method and system based on a Bluetooth key, which cancels the low-frequency driving chip and low-frequency antenna in the existing PEPS system, and integrates the PEPS function into the BCM. After integration, the PEPS module and the BCM module share the input and output interface, which reduces the overall development difficulty and hardware requirements of the PEPS system, thereby reducing the integration difficulty and overall cost of the PEPS controller and the BCM, and providing a good foundation for the landing application of the Bluetooth key. In addition, the present application also cancels the backup antenna driving chip and the backup antenna of the PEPS system, and identifies and authenticates by receiving the high-frequency signal of the traditional remote key in the backup authentication, thereby realizing the backup start function, and further reducing the development difficulty and hardware requirements of the PEPS system.

[0042] It should be noted that in the prior art, such as Figure 1As shown, the PEPS system includes a main controller 110, an ignition switch control circuit 120, a low-frequency antenna 130, a backup antenna 140, a high-frequency antenna 150, a smart key circuit 160, etc.

[0043] The main controller 110 is used for function logic processing, key positioning, low-frequency antenna driving, high-frequency RF signal receiving, etc. The main controller 110 includes a low-frequency driving chip 1101, a high-frequency receiving chip 1102, a backup antenna driving chip 1103, and a related relay 1104 for controlling CAN communication, etc.

[0044] The backup antenna driving chip 1103 and the backup antenna 140 are used for backup starting when the smart key is out of power. The smart key cooperating with the PEPS system is used for sending remote control commands, sending position signals, etc., and has the functions of receiving low-frequency LF signals (125 KHz / 134 KHz), transmitting high-frequency signals (such as radio frequency RF signals), and remotely controlling the door switch RKE. The one-key start switch cooperating with the PEPS system is used to trigger the start of the ignition signal and the authentication of the IMMO base station information, and the IMMO base station is used for backup starting when the smart key is out of power. The door handle cooperating with the PEPS system is used to trigger the unlocking signal and send low-frequency LF signals. Specifically, when the smart key battery is out of power, the PEPS controller cannot locate the smart key position through the low-frequency antenna, and can only perform key authentication through the IMMO function of the backup antenna driving chip 1103 and the backup antenna 140, and needs to authenticate the ignition within the effective range of the backup antenna with a legal key.

[0045] As shown in Figure 2 The Bluetooth key system includes a cloud end, a mobile phone end, and a vehicle end. The cloud end includes a TSP platform, an APP server (APP Server), and a digital key platform, and is developed using the ICCE standard protocol. The mobile phone end includes a mobile phone APP UI / UE, a digital key mobile end SDK, and a Bluetooth interface, and uses a second connection method to realize the Bluetooth key function. The vehicle end includes a T-BOX, a Bluetooth antenna module, and a body control module (BCM), the T-BOX integrates a Bluetooth module (for example, model NXP KW36) and an encryption chip (SE chip), the T-BOX communicates with the Bluetooth antenna module through LIN, and communicates with the BCM through a CAN bus.

[0046] Figure 3 is a schematic diagram of the principle of the PEPS system in the prior art cooperating with the Bluetooth key on the mobile phone APP to realize PE and PS functions.

[0047] In combination with Figure 3, the principle of realizing the keyless entry function (PE) in the prior art is as follows: the driver carries the smart key and approaches the vehicle, and presses the micro button of the door handle; after the PEPS controller receives the handle micro button signal, the low-frequency driving chip 1101, the low-frequency antenna 130 and the smart key circuit 160 send out a low-frequency LF 125KHz signal; the smart key receives the low-frequency signal for matching verification, and sends a high-frequency RF 433.92MHz signal to the PEPS after the matching is successful; the PEPS controller receives the high-frequency RF 433.92MHz signal of the smart key through the high-frequency receiving chip 1102 and the high-frequency antenna 150, and performs smart key identification and positioning, and if the conditions of the keyless entry function are met, a CAN signal is sent to the BCM, and the BCM controls the door lock to be unlocked and the steering light to be prompted.

[0048] In combination Figure 3 , the principle of realizing the keyless start function (PS) in the prior art is as follows: the driver carries the smart key and steps on the brake pedal, and the PEPS controller receives the brake switch, and sends out a low-frequency LF 125KHz signal through the low-frequency driving chip 1101 and the low-frequency antenna 130; the smart key receives the low-frequency signal for matching verification, and sends out a high-frequency RF 433.92MHz signal after the matching is successful; the PEPS controller receives the RF 433.92MHz signal of the smart key through the high-frequency receiving chip 1102 and the high-frequency antenna 150, and performs smart key identification and positioning; if the conditions of the keyless start function are met, when the PEPS controller identifies that the start switch is pressed through the ignition switch control circuit 120, a CAN signal is sent to the ECU (such as the engine management module EMS), so that the ECU controls the engine to start.

[0049] It should be noted that in the present application, the low-frequency driving chip and the low-frequency antenna of the original PEPS system, the backup antenna driving chip and the backup antenna are cancelled, and the smart key circuit is modified into a common remote key circuit. The common remote key matched therewith only has an RKE function, and does not have the function of receiving a low-frequency signal. Moreover, in the present application, the keyless entry and start (PEPS) function is integrated into the BCM, Figure 4 The vehicle end (including the integrated body control module BCM) structure schematic diagram of the Bluetooth key system provided by the present application is shown. As Figure 4As shown, the integrated BCM includes a BCM module (same as prior art) and a keyless entry and start (PEPS) module, the PEPS module including a main controller 410, an ignition switch control circuit 420, a remote key circuit 430 and a high frequency antenna 440. The main controller 410 includes a high frequency receiving chip 4102 and a relay 4101. The Bluetooth antenna module at the vehicle end, the T-BOX is basically the same as the prior art, and the T-BOX communicates with the Bluetooth antenna module through LIN and communicates with the integrated BCM through CAN bus. Thus, in the integrated BCM, the PEPS module and the BCM module share the input and output interface, reducing the overall development difficulty and hardware requirements of the PEPS system, thereby reducing the difficulty of integration of the PEPS controller and the BCM and the overall cost.

[0050] Figure 5 The principle of the integrated BCM provided by the present application cooperating with the Bluetooth key on the mobile phone APP to realize PE and PS functions is shown. The Bluetooth device (preferably a mobile phone APP) can realize key sharing and support remote vehicle control on the one hand, and can be used for key authentication matching and support local keyless entry and keyless start on the other hand. The network terminal T-BOX communicates with the Bluetooth device through Bluetooth, performs Bluetooth key authentication encryption, sharing, etc., and communicates with the integrated BCM through CAN, and authentication encryption is used between the two to prevent digital key information from being tampered with. The integrated BCM detects the brake pedal signal, the start switch signal, the control signal of the left front door micro switch and the high frequency RF signal, controls the keyless entry and keyless start (including backup start through a normal remote key) control logic, and controls the engine management module EMS (both through CAN communication) to start the engine.

[0051] In combination Figures 4-6 The vehicle entry and start control method based on the Bluetooth key provided by the present application includes the following steps:

[0052] S610: In response to receiving the control signal that the door handle micro switch is pressed or the brake signal that the brake pedal is stepped on, a query request of the Bluetooth key is sent to the T-BOX of the vehicle, and the query request includes the authentication state of the Bluetooth key and the location information of the Bluetooth key.

[0053] The driver carries the Bluetooth key and approaches the vehicle, and after pressing the door handle micro switch or the driver carrying the Bluetooth key and stepping on the brake pedal, the integrated BCM receives the control signal of the door handle micro switch or the brake signal of the brake pedal, and directly queries the current Bluetooth key information (including authentication state, location, etc.) to the TBOX through the CAN network, and waits for the TBOX to feedback accurate Bluetooth key information.

[0054] S620: The integrated BCM judges whether the Bluetooth key meets the conditions of keyless entry or keyless start in response to receiving the Bluetooth key information returned by the T-BOX. If yes, S630 is performed.

[0055] To ensure the communication security between the T-BOX and the integrated BCM, the T-BOX encrypts the Bluetooth key information (including authentication status, Bluetooth device positioning position, etc.) sent to the integrated BCM. The single frame signal sent by the T-BOX includes checksum check and / or message count check information (RC value for Rolling Counter check), and also includes encryption information of the Bluetooth key data. The encryption information is encrypted by a protection value algorithm for key signals (authentication status, Bluetooth device positioning position, etc.).

[0056] Preferably, the encryption information is obtained by using a complement algorithm.

[0057] As an example: the message ID sent by the T-BOX to the integrated BCM is 0X146:

[0058] 0X146 … … XX·AA·XX·Xa·XX·XXXX·PV … 50ms··

[0059] Wherein, AA is the protected value (including valid value), a is the RC value, and PV is the complement value, which is obtained by operating AA value and a value.

[0060] S630: The integrated BCM directly sends an unlocking instruction to the door lock corresponding to the door handle micro switch, and sends a flashing instruction to the turn signal lamp to realize the keyless entry operation; or in the condition of keyless start, in response to receiving the trigger signal of the start switch, sends an engine start signal to the electronic control unit, so that the electronic control unit (such as engine management module EMS) controls the engine start, realizing the keyless start operation.

[0061] In the keyless start process, the Bluetooth key state is preferentially obtained through the CAN network. In the state that the Bluetooth key is not connected or not successfully authenticated, the integrated BCM cannot obtain Bluetooth information through the CAN network, and then enters the backup start function. If the integrated BCM receives the trigger signal (high frequency signal) of any key of the legal remote key within a preset time (such as 30s) after receiving the brake signal of the brake pedal being stepped on, the Bluetooth key is successfully authenticated, and the backup start function is realized. If the trigger signal of the start switch is received, an engine start signal is directly sent to the electronic control unit, so that the electronic control unit controls the engine start, realizing the keyless start operation.

[0062] Based on the above, the application also provides a vehicle entry and start control system based on a Bluetooth key. As shown in Figure 7 The system includes a T-BOX 710 of a vehicle, a body control module (integrated BCM) 720 integrated with a keyless entry and start function, a door lock 730, a turn signal 740, and an electronic control unit 750.

[0063] The T-BOX 710 is used to receive a query request of a Bluetooth key sent by the body control module and return Bluetooth key information to the body control module, the query request including an authentication state of the Bluetooth key and location information of the Bluetooth key.

[0064] The body control module 720 integrated with the keyless entry and start function does not include a low-frequency drive chip and a low-frequency antenna, as well as a backup antenna drive chip and a backup antenna; the body control module 720 integrated with the keyless entry and start function includes a receiving module 7201, a request sending module 7202, a judgment module 7203, and an instruction sending module 7204.

[0065] The receiving module 7201 is used to receive a control signal of a door handle micro switch being pressed down, a brake signal of a brake pedal being stepped on, and Bluetooth key information returned by the T-BOX 710.

[0066] The request sending module 7202 is used to send a query request to the T-BOX 710.

[0067] The judgment module 7203 is used to judge whether the Bluetooth key meets the conditions of keyless entry or keyless start.

[0068] The instruction sending module 7204 is used to send an unlocking instruction to the door lock 730 corresponding to the door handle micro switch and send a flashing instruction to the turn signal 740 to realize a keyless entry operation when the conditions of keyless entry are met; or send an engine start signal to the electronic control unit 750 to make the electronic control unit 750 control engine start to realize a keyless start operation in response to receiving a trigger signal of a start switch when the conditions of keyless start are met.

[0069] The receiving module 7201 is also used to receive a trigger signal of any key of a legal remote key in a state that the Bluetooth key is not connected or not successfully authenticated after receiving the brake signal of the brake pedal being stepped on. The legal remote key has a remote door switch function.

[0070] Preferably, the T-BOX 710 includes an encryption module 7101, which is used to encrypt the returned Bluetooth key data.

[0071] The Bluetooth key information sent by the T-BOX 710 includes CRC check information, message count check information, and encryption information of the returned Bluetooth key data.

[0072] Preferably, the encryption module 7101 is configured to encrypt the returned Bluetooth key data using a complement algorithm.

[0073] Although some specific embodiments of the present application have been described in detail by way of example with reference to the drawings, it is to be understood that the above examples are intended to be illustrative only and the application is not limited to those examples. It will be apparent to those skilled in the art that various modifications, additions and substitutions can be made without departing from the scope and spirit of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A Bluetooth key based vehicle entry and start control method applied to a body control module integrated with keyless entry and start function, characterized in that, The application comprises the following steps: In response to receiving a control signal that a door handle micro switch is pressed or a brake signal that a brake pedal is stepped on, a query request of a Bluetooth key is sent to a T-BOX of a vehicle, the query request comprising an authentication state of the Bluetooth key and location information of the Bluetooth key; In response to receiving Bluetooth key information returned by the T-BOX, it is judged whether the Bluetooth key meets the conditions of keyless entry and keyless start; If yes, an unlock instruction is sent to a door lock corresponding to the door handle micro switch, and a flicker instruction is sent to a turn signal lamp to realize keyless entry operation; in response to receiving a trigger signal of a start switch, an engine start signal is sent to an electronic control unit to make the electronic control unit control engine start to realize keyless start operation; In a state that the Bluetooth key is not connected or not successfully authenticated, within a preset time after receiving the brake signal that the brake pedal is stepped on, if a trigger signal of any key of a legal remote key is received, in response to receiving the trigger signal of the start switch, the engine start signal is sent to the electronic control unit to make the electronic control unit control engine start to realize keyless start operation; The legal remote key has a remote door switch function; The vehicle body control module does not comprise a low-frequency driving chip and a low-frequency antenna.

2. The Bluetooth key based vehicle entry and start control method according to claim 1, characterized by, The vehicle body control module does not comprise a backup antenna driving chip and a backup antenna.

3. The Bluetooth key based vehicle entry and start control method according to claim 1, characterized by, The Bluetooth key information sent by the T-BOX comprises CRC check information, message count check information and encrypted information of returned Bluetooth key data.

4. The Bluetooth key based vehicle entry and start control method according to claim 3, characterized by, The T-BOX uses a complement algorithm to encrypt the returned Bluetooth key data.

5. A Bluetooth key based vehicle entry and start control system characterized by, The application comprises a T-BOX of a vehicle, a vehicle body control module integrated with keyless entry and start functions, a door lock, a turn signal lamp and an electronic control unit; The T-BOX is used for receiving a query request of a Bluetooth key sent by the vehicle body control module and returning Bluetooth key information to the vehicle body control module, the query request comprising an authentication state of the Bluetooth key and location information of the Bluetooth key; The vehicle body control module does not comprise a low-frequency driving chip and a low-frequency antenna; the vehicle body control module comprises a receiving module, a request sending module, a judging module and an instruction sending module; The receiving module is used for receiving a control signal that a door handle micro switch is pressed, a brake signal that a brake pedal is stepped on and receiving Bluetooth key information returned by the T-BOX; The request sending module is used for sending the query request to the T-BOX; The judging module is used for judging whether the Bluetooth key meets the conditions of keyless entry and keyless start; The instruction sending module is used for sending an unlock instruction to a door lock corresponding to the door handle micro switch and sending a flicker instruction to a turn signal lamp to realize keyless entry operation when the conditions of keyless entry are met; in response to receiving a trigger signal of a start switch, an engine start signal is sent to an electronic control unit to make the electronic control unit control engine start to realize keyless start operation when the conditions of keyless start are met. In the keyless starting process, the Bluetooth key state is acquired through the CAN network, in the state that the Bluetooth key is not connected or not authenticated successfully, the integrated BCM cannot acquire the Bluetooth information through the CAN network, then the backup starting function is entered; if the integrated BCM receives the trigger signal of any key of the legal remote control key within the preset time after receiving the brake signal that the brake pedal is stepped on, the Bluetooth key authentication is successful, the backup starting function is realized; if the trigger signal of the starting switch is received, the engine starting signal is directly sent to the electronic control unit, the electronic control unit controls the engine to start, and the keyless starting operation is realized. The receiving module is further used for receiving the trigger signal of any key of the legal remote control key after receiving the brake signal that the brake pedal is stepped on in the state that the Bluetooth key is not connected or not authenticated successfully. The legal remote control key has a remote control door switch function.

6. The Bluetooth key based vehicle entry and start control system according to claim 5, characterized in that, The body control module does not include a backup antenna driving chip and a backup antenna.

7. The Bluetooth key based vehicle entry and start control system according to claim 5, characterized in that, The T-BOX includes an encryption module, which is used for encrypting the returned Bluetooth key data. The Bluetooth key information sent by the T-BOX includes CRC check information, message count check information and encrypted information of the returned Bluetooth key data.

8. The Bluetooth key based vehicle entry and start control system according to claim 7, characterized in that, The encryption module is used for encrypting the returned Bluetooth key data by using a complement algorithm.

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