Graded speed limiting method for pure electric light truck

Abstract

The invention discloses a grading speed limiting method for a pure electric light truck, which comprises the following steps of: judging whether a vehicle meets speed limiting conditions or not, if not, not triggering a speed limiting event, and if so, triggering the speed limiting event: setting a plurality of speed limiting modes, executing corresponding speed limiting modes according to different speed limiting conditions, immediately memorizing after all speed limiting is executed, acquiring a memory value when awakening, and starting the speed limiting event; ineffectiveness after the negative electrode is pulled out is prevented; and finally, when the vehicle meets the speed limit quitting condition, the speed limit is relieved after restarting. According to the method, multiple speed limiting modes are set, the risk control means combining rigidity and flexibility is adopted to deal with overdue events of loan car purchasing users, user conflict is not likely to be caused, and good flexibility, adaptability and safety are achieved.

Description

Technical Field

[0001] This invention relates to a graded speed limiting method for pure electric light trucks, belonging to the field of vehicle control technology. Background Technology

[0002] In the field of auto loan financial risk control, when car loan customers default on payments, traditional methods (towing, litigation) are costly and time-consuming. Furthermore, logistics companies or car rental companies struggle to enforce regulations on individual drivers, leading to a loss of effective vehicle control and significant fleet management bottlenecks. Some intelligent control methods address these fleet management issues, such as binary speed limit control technology based on repayment status. This technology monitors the overdue repayment status (overdue / normal). When overdue, a command is sent to the VCU via a T-Box to reduce the speed limit to 30km / h (moving mode), restoring the original speed limit after repayment. Alternatively, remote locking or disconnecting the fuel and electricity can control overdue vehicles. However, these risk control methods are too extreme, easily provoking user resistance and posing security risks. They also lack tiered management capabilities (anti-tampering, multi-type tiered speed limits, and complete speed limit removal, etc.), resulting in incomplete coverage. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a graded speed limiting method for pure electric light trucks, so as to at least solve the problems mentioned in the background art.

[0004] The objective of this invention is achieved through the following technical solution: A method for graded speed limiting of pure electric light trucks, comprising the following steps: S1. Determine whether the vehicle meets the speed limit conditions. Yes, proceed to step S2; No, the speed limit event is not triggered; S2, Trigger speed limit event: Set multiple speed limit modes, execute the corresponding speed limit mode according to different speed limit conditions, and immediately memorize all speed limit executions. When woken up, the memorized value is retrieved to prevent it from not taking effect after the negative terminal is disconnected. S3, Speed ​​Limit Removal Trigger: When the vehicle meets the conditions for exiting the speed limit, the speed limit will be removed after restarting.

[0005] Furthermore, in step S1, the speed limit conditions include one or both of the following: financial status and prohibited operation mode. In non-financial status and permitted operation mode, the tiered speed limit will not be triggered.

[0006] Further, in step S2, the smart terminal determines the speed limiting mode / operation mode level and sends a speed limiting command to the TBOX. The TBOX then issues a speed limiting level request / operation mode request, triggering a speed limiting event. The speed limiting mode includes: Level 1 speed limit: Maximum speed is limited to 5 (±2) km / h, torque is not limited, and this limit will only take effect after charging to ensure safety; Level 2 speed limit: Maximum speed is limited to 60 (±5) km / h, speed limit does not limit torque; Level 3 speed limit: Maximum speed is limited to 80 (±5) km / h, speed limit does not limit torque; Power cut-off: The BCM controls the hazard warning lights / brake lights to illuminate based on the VCU signal. The VCU gradually controls the torque limit to reduce the vehicle speed until it comes to a standstill. After coming to a standstill, there is no creep and the accelerator pedal does not respond. Anti-tampering speed limit: After the remote monitoring system issues financial attributes, the speed limit is 5 (±2) km / h after the remote monitoring system is removed, and the torque is not limited.

[0007] Furthermore, when multiple speed limit levels exist, a tiered speed limit priority is set, and the speed limit is executed according to the priority.

[0008] Furthermore, the priority of the graded speed limit is as follows: power interruption > anti-tampering > Level 1 > Level 2 > Level 3.

[0009] Furthermore, the conditions and execution states for each speed-limiting mode to enter the speed-limiting mode include: The conditions for entering Level 1 speed limit are: receiving a Level 1 speed limit request for 5 consecutive seconds, receiving a connection to the charging gun for 5 consecutive seconds, being in financial mode and prohibited operation mode. When the above conditions are met at the same time, the VCU immediately memorizes the Level 1 speed limit and waits to be executed. When it is woken up, it retrieves the memorized value to prevent the user from not memorizing the financial version after disconnecting the negative terminal or unplugging the TBOX. In the Level 1 speed limit waiting state, the Level 1 speed limit is executed directly after charging is completed. The conditions for entering Level 2 and Level 3 speed limits are: receiving a Level 2 or Level 3 speed limit instruction for 5 seconds, having a vehicle speed of 0 for 5 seconds, being in the financial version and prohibited operation mode. When all the above conditions are met at the same time, the VCU immediately memorizes the speed limit and waits to be executed. In the speed limit waiting to be executed state, the speed limit is executed after triggering IGOFF-IGON. The conditions for power cut-off are: receiving a "power cut-off" command from the smart terminal for 5 seconds and being in financial mode. Once the above conditions are met, the VCU will immediately memorize the speed limit and wait for execution. In the speed limit waiting for execution state, the speed limit will be executed directly without restarting. The conditions for entering the anti-tamper speed limit are: the TBOX life signal is detected to be discontinuous, or the checksum is inaccurate, or the TBOX command signal is lost; the charging gun is received as connected and in financial state for 5 consecutive seconds, or the TBOX was in financial state before it was lost. When all the above conditions are met at the same time, the VCU will immediately memorize the speed limit and wait for execution; in the speed limit waiting state, the anti-tamper speed limit will be entered immediately after charging ends.

[0010] Furthermore, if a speed limit has already been set, and another speed limit instruction is received but the new speed limit has not yet taken effect, the previous speed limit execution status will be maintained to ensure the effectiveness of the speed limit execution.

[0011] Furthermore, the second and third level speed limit instruments do not provide additional prompts; the first level speed limit, anti-tamper speed limit, power cut-off speed limit instruments, and BCM provide corresponding prompts based on the speed limit execution status of the VCU and the vehicle speed.

[0012] Furthermore, in step S3, the conditions for exiting the speed limit mode include: The conditions for exiting the speed limit for Level 1, Level 2, and Level 3 speed limits are: the vehicle speed is 0 for 2 seconds, the vehicle receives an unlock command from the smart terminal for 2 seconds, and the speed limit is lifted after restarting if the above conditions are met. The conditions for exiting the speed limit by power cut-off are: the vehicle speed is 0 for 2 seconds, and the vehicle receives a power cut-off command or non-financial version from the smart terminal for 2 seconds. The speed limit will be lifted after restarting if the above conditions are met. The conditions for the speed limit to be lifted are: the vehicle speed is 0 for 2 seconds, the TBOX message life signal is continuous and the checksum is accurate. The speed limit will be lifted after restarting if the above conditions are met.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) This application adopts a combination of rigid and flexible risk control methods to deal with overdue issues of car loan users by setting anti-disassembly, power blocking, multi-type graded speed limits and complete removal of speed limits, which is not easy to cause user resistance and has good flexibility. Among them, the first-level speed limit is a mandatory enforcement measure with a low threshold and the addition of charging as an entry condition for the first-level speed limit, which ensures good safety while reminding users of overdue issues. The second and third-level speed limits are effective means of negotiation. By setting corresponding speed limit entry conditions, they meet the needs of negotiation while ensuring safety. In addition, the added anti-disassembly and power blocking speed limit modes can not only effectively prevent users from disconnecting the negative terminal to escape the restriction and ensure that the vehicle is not stolen in the garage, but also serve as a stronger enforcement measure to restrict the driver. (2) This application sets graded speed limit priorities for multiple speed limit modes and executes speed limits according to priorities, which has good graded management capabilities, achieves full coverage of graded speed limit schemes, and has good adaptability; (3) When the graded speed limit is implemented, the instrument and BCM will provide prompts according to the speed limit implementation status of the VCU to ensure vehicle safety.

[0014] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] The first embodiment of this invention provides a graded speed limiting method for pure electric light trucks. The graded speed limiting system implementing this method includes: a vehicle control unit (VCU), a remote monitoring system (T-Box), an instrument cluster, and a body control module (BCM). The VCU is connected to the remote monitoring system, instrument cluster, and body control module via a CAN bus, and the remote monitoring system is connected to a smart terminal network. The VCU is used for graded speed limiting logic control; the smart terminal is used to define speed limiting modes / operating mode levels and issue graded speed limiting commands through the remote monitoring system; the instrument cluster provides graded speed limiting execution prompts; and the body control module is used for graded speed limiting execution. These components work collaboratively through a bus network and signal interaction to form a closed-loop system of layered control.

[0017] The graded speed limiting method includes the following steps: S1. Determine whether the vehicle meets the speed limit conditions. Yes, proceed to step S2; No, the speed limit event is not triggered; S2, Trigger speed limit event: Set multiple speed limit modes, execute the corresponding speed limit mode according to different speed limit conditions, and immediately memorize all speed limit executions. When woken up, the memorized value is retrieved to prevent it from not taking effect after the negative terminal is disconnected. S3, Speed ​​Limit Removal Trigger: When the vehicle meets the conditions for exiting the speed limit, the speed limit will be removed after restarting.

[0018] In step S1, the speed limit conditions include one or both of the following: financial status and prohibited operation mode. Tiered speed limits will not be triggered in non-financial status or permitted operation mode.

[0019] In step S2, the smart terminal sets the speed limiting mode / operation mode level and sends the speed limiting command to the TBOX. The TBOX then issues a speed limiting level request / operation mode request, triggering a speed limiting event.

[0020] After receiving the TBOX command, the VCU first verifies the continuity of the counter and the accuracy of the checksum. If the verification passes, a rate limiting event is triggered; otherwise, it is treated as a communication loss.

[0021] The speed limiting modes include: (1) Level 1 speed limit: The maximum speed is limited to 5 (±2) km / h, and there is no limit to torque. To ensure safety, it will only take effect after charging. (2) Secondary speed limit: The maximum speed is limited to 60 (±5) km / h, and the torque is not limited; (3) Level 3 speed limit: The maximum speed is limited to 80 (±5) km / h, and the torque is not limited; (4) Power interruption: The BCM controls the hazard warning flashers / brake lights to illuminate according to the VCU signal. The VCU gradually controls the torque limit to reduce the vehicle speed until it stops. After stopping, there is no creep and no response to the accelerator pedal. The power interruption is mainly for inventory vehicles, limiting the torque to 0 to prevent theft. (5) Anti-tampering speed limit: After the remote monitoring system issues financial attributes, the speed limit is 5 (±2) km / h after the remote monitoring system is removed, and the torque is not limited.

[0022] When multiple speed limit levels exist, a tiered speed limit priority is set, and the speed limit is executed according to the priority. Specifically, the tiered speed limit priority is: power interruption > anti-tampering > Level 1 > Level 2 > Level 3.

[0023] Specifically, the conditions and execution states for each speed-limiting mode to enter the speed limit include: The conditions for entering Level 1 speed limit are: receiving a Level 1 speed limit request for 5 consecutive seconds, receiving a connection to the charging gun for 5 consecutive seconds, being in financial mode and prohibited operation mode. When the above conditions are met at the same time, the VCU immediately memorizes the Level 1 speed limit and waits to be executed. When it is woken up, it retrieves the memorized value to prevent the user from not memorizing the financial version after disconnecting the negative terminal or unplugging the TBOX. In the Level 1 speed limit waiting state, the Level 1 speed limit is executed directly after charging is completed. The conditions for entering Level 2 and Level 3 speed limits are: receiving a Level 2 or Level 3 speed limit instruction for 5 seconds, having a vehicle speed of 0 for 5 seconds, being in the financial version and prohibited operation mode. When all the above conditions are met at the same time, the VCU immediately memorizes the speed limit and waits to be executed. In the speed limit waiting to be executed state, the speed limit is executed after triggering IGOFF-IGON. The conditions for power cut-off are: receiving a "power cut-off" command from the smart terminal for 5 seconds and being in financial mode. Once the above conditions are met, the VCU will immediately memorize the speed limit and wait for execution. In the speed limit waiting for execution state, the speed limit will be executed directly without restarting. The conditions for entering the anti-tamper speed limit are: the TBOX life signal is detected to be discontinuous, or the checksum is inaccurate, or the TBOX command signal is lost; the charging gun is received as connected and in financial state for 5 consecutive seconds, or the TBOX was in financial state before it was lost. When all the above conditions are met at the same time, the VCU will immediately memorize the speed limit and wait for execution; in the speed limit waiting state, the anti-tamper speed limit will be entered immediately after charging ends.

[0024] If a speed limit has already been set, the previous speed limit will remain in effect until a new speed limit is issued and the new speed limit takes effect, thus ensuring the effectiveness of the speed limit.

[0025] Level 2 and 3 speed limit instruments do not provide additional prompts, serving as an effective negotiation tool; Level 1 speed limit, tamper-proof speed limit, and power cut-off speed limit instruments, along with the BCM, provide corresponding prompts based on the VCU's speed limit execution status and vehicle speed to ensure driver safety. Specifically, for Level 1 and tamper-proof speed limits, the instrument displays "Vehicle locked, please contact customer service!" based on the VCU's speed limit execution status, with a slow flashing light; for power cut-off, the instrument displays "Power system cut off, please stop safely," with a slow flashing light; the BCM does not illuminate the brake lights after the vehicle comes to a stop, only illuminating the hazard warning lights in the ON position, which turn off after the ON position is removed.

[0026] In step S3, the conditions for exiting the speed limit mode include: The conditions for exiting the speed limit for Level 1, Level 2, and Level 3 speed limits are: the vehicle speed is 0 for 2 seconds, the vehicle receives an unlock command from the smart terminal for 2 seconds, and the speed limit is lifted after restarting if the above conditions are met. The conditions for exiting the speed limit by power cut-off are: the vehicle speed is 0 for 2 seconds, and the vehicle receives a power cut-off command or non-financial version from the smart terminal for 2 seconds. The speed limit will be lifted after restarting if the above conditions are met. The conditions for the speed limit to be lifted are: the vehicle speed is 0 for 2 seconds, the TBOX message life signal is continuous and the checksum is accurate. The speed limit will be lifted after restarting if the above conditions are met.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for graded speed limiting of pure electric light trucks, characterized in that, Includes the following steps: S1. Determine whether the vehicle meets the speed limit conditions. Yes, proceed to step S2; No, the speed limit event is not triggered; S2, Trigger speed limit event: Set multiple speed limit modes, execute the corresponding speed limit mode according to different speed limit conditions, and immediately memorize all speed limit executions. When woken up, the memorized value is retrieved to prevent it from not taking effect after the negative terminal is disconnected. S3, Speed ​​Limit Removal Trigger: When the vehicle meets the conditions for exiting the speed limit, the speed limit will be removed after restarting.

2. The graded speed limiting method for pure electric light trucks according to claim 1, characterized in that, In step S1, the speed limit conditions include one or both of the following: financial status and prohibited operation mode. In non-financial status and permitted operation mode, the tiered speed limit will not be triggered.

3. The graded speed limiting method for pure electric light trucks according to claim 1, characterized in that, In step S2, the smart terminal specifies the speed limiting mode / operation mode level and sends a speed limiting command to the TBOX. The TBOX then issues a speed limiting level request / operation mode request, triggering a speed limiting event. The speed limiting mode includes: Level 1 speed limit: Maximum speed is limited to 5 (±2) km / h, torque is not limited, and this limit will only take effect after charging to ensure safety; Level 2 speed limit: Maximum speed is limited to 60 (±5) km / h, speed limit does not limit torque; Level 3 speed limit: Maximum speed is limited to 80 (±5) km / h, speed limit does not limit torque; Power cut-off: The BCM controls the hazard warning lights / brake lights to illuminate based on the VCU signal. The VCU gradually controls the torque limit to reduce the vehicle speed until it comes to a standstill. After coming to a standstill, there is no creep and the accelerator pedal does not respond. Anti-tampering speed limit: After the remote monitoring system issues financial attributes, the speed limit is 5 (±2) km / h after the remote monitoring system is removed, and the torque is not limited.

4. The graded speed limiting method for pure electric light trucks according to claim 3, characterized in that, When multiple speed limit levels exist, set the priority of the speed limit levels and execute the speed limit according to the priority.

5. The graded speed limiting method for pure electric light trucks according to claim 4, characterized in that, The priority of the graded speed limit is: power interruption > anti-tampering > Level 1 > Level 2 > Level 3.

6. The graded speed limiting method for pure electric light trucks according to claim 4, characterized in that, The conditions and execution status for entering each speed limiting mode include: The conditions for entering Level 1 speed limit are: receiving a Level 1 speed limit request for 5 consecutive seconds, receiving a connection to the charging gun for 5 consecutive seconds, being in financial mode and prohibited operation mode. When the above conditions are met at the same time, the VCU immediately memorizes the Level 1 speed limit and waits to be executed. When it is woken up, it retrieves the memorized value to prevent the user from not memorizing the financial version after disconnecting the negative terminal or unplugging the TBOX. In the Level 1 speed limit waiting state, the Level 1 speed limit is executed directly after charging is completed. The conditions for entering Level 2 and Level 3 speed limits are: receiving a Level 2 or Level 3 speed limit instruction for 5 seconds, having a vehicle speed of 0 for 5 seconds, being in the financial version and prohibited operation mode. When all the above conditions are met at the same time, the VCU immediately memorizes the speed limit and waits to be executed. In the speed limit waiting to be executed state, the speed limit is executed after triggering IGOFF-IGON. The conditions for power cut-off are: receiving a "power cut-off" command from the smart terminal for 5 seconds and being in financial mode. Once the above conditions are met, the VCU will immediately memorize the speed limit and wait for execution. In the speed limit waiting for execution state, the speed limit will be executed directly without restarting. The conditions for entering the anti-tamper speed limit are: the TBOX life signal is detected to be discontinuous, or the checksum is inaccurate, or the TBOX command signal is lost; the charging gun is received as connected and in financial state for 5 consecutive seconds, or the TBOX was in financial state before it was lost. When all the above conditions are met at the same time, the VCU will immediately memorize the speed limit and wait for execution; in the speed limit waiting state, the anti-tamper speed limit will be entered immediately after charging ends.

7. The graded speed limiting method for pure electric light trucks according to claim 6, characterized in that, If a speed limit has already been set, the previous speed limit will remain in effect until a new speed limit is issued and the new speed limit takes effect, thus ensuring the effectiveness of the speed limit.

8. The graded speed limiting method for pure electric light trucks according to claim 7, characterized in that, Level 2 and 3 speed limit instruments do not provide additional prompts; Level 1 speed limit, anti-tamper speed limit, power cut-off speed limit instruments, and BCM provide corresponding prompts based on the speed limit execution status of the VCU and the vehicle speed.

9. The graded speed limiting method for pure electric light trucks according to claim 1, characterized in that, In step S3, the conditions for exiting the speed limit mode include: The conditions for exiting the speed limit for Level 1, Level 2, and Level 3 speed limits are: the vehicle speed is 0 for 2 seconds, the vehicle receives an unlock command from the smart terminal for 2 seconds, and the speed limit is lifted after restarting if the above conditions are met. The conditions for exiting the speed limit by power cut-off are: the vehicle speed is 0 for 2 seconds, and the vehicle receives a power cut-off command or non-financial version from the smart terminal for 2 seconds. The speed limit will be lifted after restarting if the above conditions are met. The conditions for the speed limit to be lifted are: the vehicle speed is 0 for 2 seconds, the TBOX message life signal is continuous and the checksum is accurate. The speed limit will be lifted after restarting if the above conditions are met.