A parking brake prompting method and system for converting a fuel vehicle to an electric vehicle

Abstract

The present invention discloses a parking brake prompt method and system for an oil-to-electric vehicle conversion. When the vehicle is not in the P gear, the body control module (BSI) analyzes and processes the current gear signal received from the vehicle control unit (VCU), whether the brake pedal is depressed, and the press / pull signal of the electronic handbrake, and sends the processing result to the vehicle instrument cluster (CMB). The vehicle instrument cluster (CMB) displays the corresponding text prompt according to the received processing result. When the vehicle is in the P gear, the VCU analyzes and processes the current gear signal obtained from the electronic gear selector control unit (EGS), the signal whether the brake pedal is depressed, and the press / pull signal of the electronic handbrake, and sends the processing result to the vehicle instrument cluster (CMB). The CMB displays the corresponding text prompt according to the received processing result. Since the adapted electric vehicle has no P gear lock, the present invention provides a better driving experience for the driver, realizes independent development based on fuel vehicles, saves development costs, and reduces the development cycle.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle electronic and electrical functions, and particularly relates to a parking brake prompting method and system for converted fuel vehicles to electric vehicles. Background Art

[0002] The development of electric vehicles in the new energy field is in full swing. With the increasing maturity of the three-electric system technology of pure electric vehicles, converting a fuel vehicle with a mature function into an electric vehicle has become an adaptation solution chosen by more and more vehicle manufacturers, especially joint ventures.

[0003] Since the converted electric vehicle does not have a P gear lock, when the electric vehicle is in the P gear, it cannot release the parking brake like a fuel vehicle by the driver stepping on the brake pedal and simultaneously pressing the electronic handbrake switch. That is, when the electric vehicle is in the P gear, the electronic parking brake function cannot be released. In this condition, a new electronic parking brake prompting interface needs to be added to the vehicle instrument to inform the driver and guide the driver to perform relevant operations and drive the vehicle according to the content of the interface prompt. Without this prompting system, customers may mistakenly think that the vehicle parking brake function is abnormal, causing great complaints from customers. Similarly, when the vehicle is in other gears (non-P gear), although the driver's operation to release the parking brake is the same as that of a fuel vehicle, since the engine electronic control unit CMM and the transmission electronic control unit BV that implement the electronic parking prompting interface function system on the electric vehicle do not exist, the implementation of the electronic parking prompting interface function cannot completely follow the strategy of the fuel vehicle when the electric vehicle is in the non-P gear condition.

[0004] Since the function of the electronic parking prompting system involves many parts, if developed from scratch, the development cycle and cost will also increase, failing to meet the requirements of short, flat, and fast adaptation projects. Therefore, there is an urgent need for a development cycle that is short and can meet the functional architecture of the electronic parking brake prompting system for adapting pure electric vehicles. Summary of the Invention

[0005] To solve the above problems, the present invention provides a parking brake prompting method and system for converted fuel vehicles to electric vehicles. The specific strategy includes two systems. One is to still combine the electronic parking brake prompting interface function strategy on the fuel vehicle and appropriately evolve it to implement the electronic parking brake prompting system when the vehicle is in a non-P gear; the other is to develop an electronic parking brake prompting interface strategy for a pure electric vehicle without a P gear lock to implement the electronic parking brake prompting system when the vehicle is in the P gear.

[0006] The parking brake prompting method for converted fuel vehicles to electric vehicles to achieve one of the purposes of the present invention includes:

[0007] The electronic parking brake prompting method when the vehicle is in a non-P gear:

[0008] The body control unit BSI analyzes and processes the current gear signal received from the VCU, the signal indicating whether the brake pedal is depressed, and the signal for pressing / pulling the electronic parking brake, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result.

[0009] Method for electronic parking brake prompt when the vehicle is in P gear:

[0010] The vehicle control unit VCU analyzes and processes the current gear signal received from the shift knob electronic control unit EGS, the signal indicating whether the brake pedal is depressed, and the signal for pressing / pulling the electronic parking brake, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result.

[0011] Furthermore, in the method for electronic parking brake prompt when the vehicle is in a non-P gear, the method for each control unit to communicate with the body control unit BSI includes:

[0012] The brake switch sends the signal indicating whether the brake pedal is depressed to the vehicle control unit VCU through a hard wire signal; the vehicle control unit VCU sends it to the body control unit BSI through the CAN IS network;

[0013] The electronic parking brake switch sends the switch request signal to the electronic parking control unit EPB through a hard wire. After processing the switch request signal, the electronic parking control unit EPB sends the signal for pressing / pulling the handbrake switch to the body control unit BSI through the original vehicle CAN IS network;

[0014] The shift knob EGS sends the gear signal to the vehicle control unit VCU through the high-speed EV_CAN network; the vehicle control unit VCU simulates the gearbox electronic control unit BV to convert the received gear signal, and sends the converted gear signal to the body control unit BSI through the CANIS network.

[0015] The EV_CAN is a newly added power network for electric vehicles, and its network transmission rate is 500 kb / s.

[0016] Furthermore, in the method for electronic parking brake prompt when the vehicle is in a non-P gear, the method for the body control unit BSI to analyze and process the current gear signal received from the VCU, the signal indicating whether the brake pedal is depressed, and the signal for pressing / pulling the electronic parking brake includes:

[0017] When the brake pedal is not depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the first CAN function message to the instrument CMB through the CAN IDIV network. After receiving the first CAN function message, the instrument prompts the driver on the instrument that if you need to release the parking brake, please step on the brake pedal;

[0018] When the brake pedal is depressed and the electronic parking brake switch is pressed, the body control module BSI sends a second CAN function message to the instrument cluster CMB via the CAN IDIV network. After receiving the second CAN function message, the instrument cluster prompts the driver that the parking brake is released.

[0019] When the electronic parking brake switch is pulled up, the body control module BSI sends a third CAN function message to the instrument cluster CMB via the CAN IDIV network. After receiving the third CAN function message, the instrument cluster prompts the driver that the parking brake is engaged.

[0020] Furthermore, in the method for prompting the electronic parking brake when the vehicle is in the P gear, the method for each control unit to send signals to the vehicle control unit VCU includes:

[0021] The brake switch sends a signal indicating whether the brake pedal is depressed to the vehicle control unit VCU via a hardwired signal.

[0022] The electronic parking brake switch sends a switch request signal to the electronic parking brake control unit EPB via a hardwired connection. After processing the switch request signal, the electronic parking brake control unit EPB sends a signal indicating whether the parking brake switch is pressed / pulled up to the vehicle control unit VCU via the original vehicle CAN IS network.

[0023] The shift knob EGS sends the gear position signal to the vehicle control unit VCU via the high-speed EV_CAN network.

[0024] Even further, the method for the vehicle control unit VCU to analyze and process based on the current gear position signal obtained from the shift knob electronic control unit EGS, the signal indicating whether the brake pedal is depressed, and the signal indicating whether the electronic parking brake is pressed / pulled up includes:

[0025] When the brake pedal is not depressed and the electronic parking brake switch is pressed, the vehicle control unit VCU sends a fourth CAN function message to the instrument cluster CMB via the EV_CAN network. After receiving the fourth CAN function message, the instrument cluster prompts the driver to first depress the brake pedal to exit the P gear.

[0026] When the brake pedal is depressed and the electronic parking brake switch is pressed, the vehicle control unit VCU sends a fifth CAN function message to the instrument cluster CMB via the EV_CAN network. After receiving the fifth CAN function message, the instrument cluster prompts the driver to release the P gear, depress the brake, and release the parking brake switch.

[0027] A parking brake prompting system for a converted gasoline-electric vehicle to achieve the second object of the present invention, including a first prompting module and a second prompting module;

[0028] The first prompt module is used to analyze and process the current gear signal received from the VCU, the signal indicating whether the brake pedal is depressed, and the signal of pressing / pulling the electronic handbrake by the body control module BSI when the vehicle is not in the P gear, and send the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result;

[0029] The second prompt module is used to analyze and process the current gear signal received from the electronic gear shift control unit EGS, the signal indicating whether the brake pedal is depressed, and the signal of pressing / pulling the electronic handbrake by the vehicle control unit VCU when the vehicle is in the P gear, and send the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result.

[0030] Beneficial effects:

[0031] 1. Since the adapted electric vehicle does not have a P gear lock, the electric vehicle cannot release the electronic parking brake function in the P gear like a fuel vehicle. For customers who have driven fuel vehicles for many years, when driving an electric vehicle, they will also habitually press the electronic handbrake switch and step on the brake pedal in the P gear to try to release the electronic parking brake. At this time, since the electric vehicle does not have a P gear lock, there may be risks affecting vehicle safety such as vehicle rollback, and even the driver may think that the electronic parking brake function of the vehicle is faulty. In the P gear electronic parking prompt system of the present invention, a friendly text prompt can be given to the user to help them perform correct operations, enabling customers to quickly switch or adapt to the driving habits from fuel vehicles to electric vehicles;

[0032] 2. In the parking brake prompt system, the vehicle combination instrument CMB involves two networks, namely the original fuel vehicle low-speed CAN IDIV network and the newly added high-speed power EV_CAN network; if the prompt message is sent to the instrument entirely through the CAN IDIV network, the software framework of the original body control module BSI needs to be modified, with high technical requirements and a long development cycle; if it is sent to the instrument entirely through the EV_CAN network, since it is a modification based on a fuel vehicle, the relevant prompts of the fuel vehicle will also be prompted on the instrument CMB, and there will surely be situations where several prompts appear on the instrument or relevant fault prompts appear on the instrument. The present invention innovatively proposes that the vehicle control unit VCU communicates with the instrument CMB through the newly added high-speed power EV_CAN network to achieve the electronic parking brake prompt in the P gear; the body control module BSI communicates with the instrument CMB through the low-speed CAN IDIV network to achieve the electronic parking brake prompt when not in the P gear, which are independent of each other and do not affect each other;

[0033] 3. It realizes independent development based on fuel vehicles, saves development costs, reduces the development cycle, and also provides a reference idea for the development of subsequent independent projects. Description of the drawings

[0034] Figure 1 It is the functional block diagram of the non-P gear electronic parking reminder system in the method of the present invention;

[0035] Figure 2 It is the functional block diagram of the P gear electronic parking reminder system in the method of the present invention. Detailed implementation manners

[0036] The following detailed implementation manners are used to explain the technical solutions of the claims of the present invention so that those skilled in the art can understand this claim book. The protection scope of the present invention is not limited to the following specific implementation structures. Those made by those skilled in the art that include the technical solutions of the claim book of the present invention and are different from the following detailed implementation manners are also within the protection scope of the present invention.

[0037] In the description of the present invention, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0038] An electronic parking reminder system for converting a fuel vehicle to an electric vehicle specifically includes two types. One is a non-P gear electronic parking reminder system, as Figure 1 shown, and the other is a P gear electronic parking reminder system, as Figure 2 shown. The implementation methods of the two systems are different.

[0039] This system is composed of controllers such as the EPB electronic parking control unit, the shift knob control unit EGS, the VCU, the body controller BSI, and the vehicle instrument CMB. Among them, the vehicle instrument CMB involves two networks, namely the original fuel vehicle low-speed CAN IDIV network and the newly added high-speed power EV_CAN network. The CMB obtains the CAN message of the upstream electronic control unit body controller BSI through the CAN IDIV network to realize the reminder content of the instrument when not in the P gear; the CMB obtains the reminder content of the instrument when in the P gear by obtaining the upstream electronic control unit VCU through the EV_CAN network. The EV_CAN high-speed network and the CAN IDIV low-speed network are independent of each other and do not affect each other. That is, the electronic parking reminder system when the vehicle is in the P gear and the electronic parking reminder system when the vehicle is not in the P gear.

[0040] In the function of the non-P gear electronic parking reminder system, when the vehicle gear is in N / R / D gear:

[0041] (1) If the driver intends to release the parking brake by only pressing the electronic parking brake switch, at this time, the VCU will simulate the BV to send the gear signal POS_LEVIER_BV = 1 or 2 or 3 (signal value 0 represents the P gear, signal value 1 represents the R gear, signal value 2 represents the N gear, signal value 3 represents the D gear) to the BSI; the EPB will also send the CAN signals related to the pressing of the electronic parking brake switch, such as the EPB switch action request signal DDE_SNGL_APP_BOUTON_FSE = 1 (1 represents the electronic parking brake switch request), and the action status of the EPB function ETAT_FNCT_FREIN_STATION_IHM = 0 (0 represents the parking brake release) to the BSI. However, since the BSI does not receive the CAN message of the brake pedal being depressed, that is, Contact_FREIN1 = 0 (0 represents the brake pedal not depressed, 1 represents the brake pedal depressed), after the BSI makes a judgment, the BSI will send the CAN message POINT_MESS value 538 to the CMB through the CAN IDIV network. According to the received CAN message value 538, the instrument will prompt the driver on the instrument to step on the brake pedal if you want to release the parking brake.

[0042] (2) If the driver intends to release the parking brake while pressing the electronic parking brake switch and stepping on the brake pedal at the same time, at this time, the VCU will simulate the BV to send a non-P gear signal POS_LEVIER_BV = 1 or 2 or 3 (signal value 0 represents the P gear, signal value 1 represents the R gear, signal value 2 represents the N gear, signal value 3 represents the D gear) to the BSI. The EPB will also send the CAN signals related to the pressing of the electronic parking brake switch, such as the EPB switch action request signal DDE_SNGL_APP_BOUTON_FSE = 1 (1 represents the electronic parking brake switch request), and the action status of the EPB function ETAT_FNCT_FREIN_STATION_IHM = 0 (0 represents the parking brake release) to the BSI. At the same time, the VCU simulates the CMM to send the signal Contact_FREIN1 = 1 of the brake pedal being depressed to the BSI. After the BSI makes a judgment, it will send the CAN message POINT_MESS value 98 to the CMB through the CAN IDIV network. According to the received CAN message value 98, the instrument will prompt the driver on the instrument that the parking brake has been released.

[0043] (3) If the driver manually pulls up the electronic parking brake switch to enable the parking brake, at this time, the VCU will simulate the BV to send a gear signal POS_LEVIER_BV = 1 or 2 or 3 for non-P gear to the BSI (the signal value 0 represents P gear, the signal value 1 represents R gear, the signal value 2 represents N gear, and the signal value 3 represents D gear). The EPB will send CAN signals related to the pulling up of the electronic parking brake switch, such as the EPB switch action request signal DDE_SNGL_APP_BOUTON_FSE = 1 (1 represents the electronic parking brake switch request), and the action status of the EPB function ETAT_FNCT_FREIN_STATION_IHM = 1 (1 represents the parking brake locked) to the BSI. At the same time, the VCU simulates the CMM to send a signal Contact_FREIN1 = 1 indicating that the brake pedal is depressed to the BSI. After the BSI makes a judgment, it will send a CAN message POINT_MESS value 97 to the CMB through the CAN IDIV network. The instrument will prompt the driver that the parking brake is enabled on the instrument according to the received CAN message value 97.

[0044] In the P-gear electronic parking brake reminder system function, when the vehicle gear is in P gear:

[0045] (1) If the driver intends to release the parking brake by only pressing the electronic parking brake switch, the VCU receives the vehicle's current gear information GSC_ActGearSt = 7 (7 represents the current gear is in P gear) on the EV_CAN network, and receives the electronic parking brake switch status signal Electric_Park_Brake_Switch_Status = 1 on the CAN IS network. However, at this time, the VCU receives a hard-wired signal voltage value HW_Brake = 0V (0 represents the low level value when the brake pedal is not depressed) of the brake pedal. At this time, the VCU will send a CAN message VCM_stDrvReqWrgOptInfo = 3 on the EV_CAN to the instrument CMB. The CMB will prompt the driver on the instrument to press the brake pedal first to exit the P gear according to the CAN message value 3 on the EV_CAN.

[0046] (2) If the driver intends to release the parking brake while pressing the electronic parking brake switch and stepping on the brake pedal at the same time, when the VCU receives the vehicle's current gear information GSC_ActGearSt = 7 (7 represents the current gear in the P gear) on the EV_CAN network, receives the electronic parking brake switch status signal Electric_Park_Brake_Switch_Status = 1 on the CAN IS network, and at the same time receives the hard wire signal voltage value HW_Brake = 12V (12 represents the high level value when the brake pedal is stepped on) of the brake pedal, the VCU will send the CAN message VCM_stDrvReqWrgOptInfo = 4 to the instrument CMB on the EV_CAN. The CMB will prompt the driver on the instrument to release the P gear first and step on the brake to release the parking brake switch according to the CAN message value 4 on the EV_CAN.

[0047] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0048] The present application also provides a parking brake prompt system for an oil-to-electric vehicle conversion, including a first prompt module and a second prompt module;

[0049] The first prompt module is used for when the vehicle is in a non-P gear, the body control unit BSI analyzes and processes the current gear signal received from the VCU, the signal indicating whether the brake pedal is stepped on, and the press / pull signal of the electronic parking brake, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result;

[0050] The second prompt module is used for when the vehicle is in the P gear, the vehicle control unit VCU analyzes and processes the current gear signal received from the shift knob electronic control unit EGS, the signal indicating whether the brake pedal is stepped on, and the press / pull signal of the electronic parking brake, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result.

[0051] In the first prompt module, the methods for each control unit to send signals to the body control unit BSI include:

[0052] The brake switch sends the signal indicating whether the brake pedal is stepped on to the vehicle control unit VCU through a hard wire signal; the vehicle control unit VCU sends it to the body control unit BSI through the CAN IS network;

[0053] The electronic parking brake switch sends the switch request signal to the electronic parking brake control unit EPB through a hard wire. After processing the switch request signal, the electronic parking brake control unit EPB sends the signal of pressing / pulling the parking brake switch to the body control unit BSI through the original vehicle CAN IS network;

[0054] The shift knob EGS sends the gear position signal to the vehicle control unit VCU through the high-speed EV_CAN network; the vehicle control unit VCU simulates the gearbox electronic control unit BV to convert the received gear position signal, and sends the converted gear position signal to the body control unit BSI through the CANIS network.

[0055] In the first prompt module, in the electronic parking brake prompt method when the vehicle is not in the P gear, the method for the body control unit BSI to analyze and process according to the current gear position signal received from the VCU, the signal of whether the brake pedal is depressed, and the signal of pressing / pulling the electronic parking brake includes:

[0056] When the brake pedal is not depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the first CAN function message to the instrument CMB through the CAN IDIV network. After receiving the first CAN function message, the instrument prompts the driver on the instrument to step on the brake pedal if you want to release the parking brake;

[0057] When the brake pedal is depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the second CAN function message to the instrument CMB through the CAN IDIV network. After receiving the second CAN function message, the instrument prompts on the instrument that the parking brake is released;

[0058] When the electronic parking brake switch is pulled up, the body control unit BSI sends the third CAN function message to the instrument CMB through the CAN IDIV network. After receiving the third CAN function message, the instrument prompts on the instrument that the parking brake is enabled.

[0059] In the second prompt module, in the electronic parking brake prompt method when the vehicle is in the P gear, the method for each control unit to send signals to the vehicle control unit VCU includes:

[0060] The brake switch sends the signal of whether the brake pedal is depressed to the vehicle control unit VCU through a hard wire signal;

[0061] The electronic parking brake switch sends the switch request signal to the electronic parking brake control unit EPB through a hard wire. After processing the switch request signal, the electronic parking brake control unit EPB sends the signal of pressing / pulling the parking brake switch to the vehicle control unit VCU through the original vehicle CAN IS network;

[0062] The shift knob EGS sends the gear position signal to the vehicle control unit VCU through the high-speed EV_CAN network.

[0063] In the second prompting module, the method for the vehicle control unit (VCU) to analyze and process the current gear signal obtained from the electronic gear shift knob control unit (EGS), the signal indicating whether the brake pedal is depressed, and the signal for pressing / pulling the electronic handbrake includes:

[0064] When the brake pedal is not depressed and the electronic handbrake switch is pressed, the vehicle control unit (VCU) sends a fourth CAN function message to the instrument cluster (CMB) via the EV_CAN network. After receiving the fourth CAN function message, the instrument cluster prompts the driver to step on the brake pedal to exit the P gear.

[0065] When the brake pedal is depressed and the electronic handbrake switch is pressed, the vehicle control unit (VCU) sends a fifth CAN function message to the instrument cluster (CMB) via the EV_CAN network. After receiving the fifth CAN function message, the instrument cluster prompts the driver to release the P gear, step on the brake, and release the handbrake switch.

[0066] The content not detailed in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A parking brake prompting method for an oil-to-electric vehicle conversion, characterized in that, it includes the following steps: The electronic parking brake prompting method when the vehicle is in a non-P gear: The body control unit BSI analyzes and processes the current gear signal received from the VCU, the signal indicating whether the brake pedal is depressed, and the push / pull signal of the electronic handbrake, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result; The electronic parking brake prompting method when the vehicle is in the P gear: The vehicle control unit VCU analyzes and processes the current gear signal received from the electronic gearshift knob control unit EGS, the signal indicating whether the brake pedal is depressed, and the push / pull signal of the electronic handbrake, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result; In the electronic parking brake prompting method when the vehicle is in a non-P gear, the method for each control unit to communicate with the body control unit BSI includes: The brake switch sends the signal indicating whether the brake pedal is depressed to the vehicle control unit VCU through a hard wire signal; the vehicle control unit VCU sends it to the body control unit BSI through the original vehicle CAN IS network; The electronic handbrake switch sends the switch request signal to the electronic parking brake control unit EPB through a hard wire. After the electronic parking brake control unit EPB processes the switch request signal, it sends the push / pull signal of the electronic handbrake switch to the body control unit BSI through the original vehicle CAN IS network; The electronic gearshift knob control unit EGS sends the gear signal to the vehicle control unit VCU through the newly added high-speed EV_CAN network; the vehicle control unit VCU simulates the gearbox electronic control unit BV to convert the received gear signal, and sends the converted gear signal to the body control unit BSI through the original vehicle CAN IS network; In the electronic parking brake prompting method when the vehicle is in the P gear, the method for each control unit to send signals to the vehicle control unit VCU includes: The brake switch sends the signal indicating whether the brake pedal is depressed to the vehicle control unit VCU through a hard wire signal; The electronic handbrake switch sends the switch request signal to the electronic parking brake control unit EPB through a hard wire. After the electronic parking brake control unit EPB processes the switch request signal, it sends the push / pull signal of the electronic handbrake switch to the vehicle control unit VCU through the original vehicle CAN IS network; The electronic gearshift knob control unit EGS sends the gear signal to the vehicle control unit VCU through the newly added high-speed EV_CAN network.

2. The parking brake prompting method for an oil-to-electric vehicle conversion according to claim 1, characterized in that, In the electronic parking brake prompting method when the vehicle is in a non-P gear, the method for the body control unit BSI to analyze and process the current gear signal received from the VCU, the signal indicating whether the brake pedal is depressed, and the push / pull signal of the electronic handbrake includes: When the brake pedal is not depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the first CAN function message to the vehicle instrument CMB via the CAN IDIV network. After receiving the first CAN function message, the instrument prompts on the instrument that if you want to release the parking brake, please step on the brake pedal; When the brake pedal is depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the second CAN function message to the vehicle instrument CMB via the CAN IDIV network. After receiving the second CAN function message, the instrument prompts on the instrument that the parking brake is released; When the electronic parking brake switch is pulled up, the body control unit BSI sends the third CAN function message to the vehicle instrument CMB via the CAN IDIV network. After receiving the third CAN function message, the instrument prompts on the instrument that the parking brake is enabled.

3. The method for prompting the parking brake of an oil-to-electric converted vehicle according to claim 1, characterized in that, The method for the vehicle control unit VCU to analyze and process according to the current gear signal obtained from the shift knob electronic control unit EGS, the signal of whether the brake pedal is depressed, and the signal of the electronic parking brake being pressed / pulled up includes: When the brake pedal is not depressed and the electronic parking brake switch is pressed, the vehicle control unit VCU sends the fourth CAN function message to the vehicle instrument CMB via the newly added high-speed EV_CAN network. After receiving the fourth CAN function message, the instrument prompts the driver to step on the brake pedal first to exit the P gear; When the brake pedal is depressed and the electronic parking brake switch is pressed, the vehicle control unit VCU sends the fifth CAN function message to the vehicle instrument CMB via the newly added high-speed EV_CAN network. After receiving the fifth CAN function message, the instrument prompts to release the P gear, step on the brake pedal, and release the electronic parking brake switch.

4. A parking brake prompting system for an oil-to-electric converted vehicle adopting the method according to claim 1, characterized in that, It includes a first prompting module and a second prompting module; The first prompting module is used for when the vehicle is in a non-P gear, the body control unit BSI analyzes and processes according to the current gear signal received from the VCU, the signal of whether the brake pedal is depressed, and the signal of the electronic parking brake being pressed / pulled up, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result; The second prompting module is used for when the vehicle is in the P gear, the vehicle control unit VCU analyzes and processes according to the current gear signal obtained from the shift knob electronic control unit EGS, the signal of whether the brake pedal is depressed, and the signal of the electronic parking brake being pressed / pulled up, and sends the processing result to the vehicle instrument CMB. The vehicle instrument CMB displays the corresponding text prompt according to the received processing result.

5. The parking brake prompting system for an oil-to-electric converted vehicle according to claim 4, characterized in that, In the first prompting module, the method for each control unit to send a signal to the body control unit BSI includes: The brake switch sends the signal of whether the brake pedal is depressed to the vehicle control unit VCU through a hard wire signal; the vehicle control unit VCU sends it to the body control unit BSI through the original vehicle CAN IS network; The electronic parking brake switch sends the switch request signal to the electronic parking brake control unit EPB through a hard wire. After processing the switch request signal, the electronic parking brake control unit EPB sends the push / pull signal of the electronic parking brake switch to the body control unit BSI through the original vehicle CAN IS network; The electronic gearshift knob control unit EGS sends the gear position signal to the vehicle control unit VCU through the newly added high-speed EV_CAN network; The vehicle control unit VCU simulates the gearbox electronic control unit BV to convert the received gear position signal and sends the converted gear position signal to the body control unit BSI through the original vehicle CAN IS network.

6. The parking brake prompt system for an oil-to-electric converted vehicle according to claim 4 or 5, characterized in that In the first prompt module, in the electronic parking brake prompt method when the vehicle is not in the P gear, the method for the body control unit BSI to analyze and process according to the current gear position signal received from the VCU, the signal of whether the brake pedal is depressed, and the push / pull signal of the electronic parking brake includes: When the brake pedal is not depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the first CAN function message to the vehicle instrument CMB through the CAN IDIV network. After receiving the first CAN function message, the instrument prompts on the instrument that if you want to release the parking brake, please step on the brake pedal; When the brake pedal is depressed and the electronic parking brake switch is pressed, the body control unit BSI sends the second CAN function message to the vehicle instrument CMB through the CAN IDIV network. After receiving the second CAN function message, the instrument prompts on the instrument that the parking brake is released; When the electronic parking brake switch is pulled up, the body control unit BSI sends the third CAN function message to the vehicle instrument CMB through the CAN IDIV network. After receiving the third CAN function message, the instrument prompts on the instrument that the parking brake is enabled.

7. The parking brake prompt system for an oil-to-electric converted vehicle according to claim 4, characterized in that In the second prompt module, in the electronic parking brake prompt method when the vehicle is in the P gear, the method for each control unit to send signals to the vehicle control unit VCU includes: The brake switch sends the signal of whether the brake pedal is depressed to the vehicle control unit VCU through a hard wire signal; The electronic parking brake switch sends the switch request signal to the electronic parking brake control unit EPB through a hard wire. After processing the switch request signal, the electronic parking brake control unit EPB sends the push / pull signal of the electronic parking brake switch to the vehicle control unit VCU through the original vehicle CAN IS network; The electronic gearshift knob control unit EGS sends the gear position signal to the vehicle control unit VCU through the newly added high-speed EV_CAN network.

8. The parking brake prompt system for an oil-to-electric converted vehicle according to claim 4 or 7, characterized in that In the second prompt module, the method for the vehicle control unit VCU to analyze and process according to the current gear position signal obtained from the electronic gearshift knob control unit EGS, the signal of whether the brake pedal is depressed, and the push / pull signal of the electronic parking brake includes: When the brake pedal is not depressed and the electronic parking brake switch is pressed, the vehicle control unit (VCU) sends the fourth CAN function message to the vehicle instrument cluster (CMB) via the newly added high-speed EV_CAN network. After receiving the fourth CAN function message, the instrument cluster prompts the driver to depress the brake pedal to exit the P gear. When the brake pedal is depressed and the electronic parking brake switch is pressed, the vehicle control unit (VCU) sends the fifth CAN function message to the vehicle instrument cluster (CMB) via the newly added high-speed EV_CAN network. After receiving the fifth CAN function message, the instrument cluster prompts to release the P gear, depress the brake pedal, and release the electronic parking brake switch.

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