Speed-limiting and torque-limiting control method and system and vehicle

Abstract

The invention provides a speed-limiting and torque-limiting control method and system and a vehicle, and relates to the technical field of automobile control, and the method comprises the steps that S110, a vehicle speed-limiting and torque-limiting relieving instruction is received; and S120, based on the vehicle speed limiting and torque limiting relieving instruction, speed limiting and torque limiting on the vehicle are relieved, timing is started till the timing duration reaches the preset timing duration, timing is reset, and speed limiting and torque limiting are conducted on the vehicle. By receiving the vehicle speed-limiting and torque-limiting relieving instruction, speed-limiting and torque-limiting of the vehicle can be relieved temporarily, so that a user can drive the vehicle normally within a certain period of time and drive the vehicle into a service station for maintenance, and the situation that the vehicle cannot be used normally due to sudden speed-limiting and torque-limiting under the condition that sufficient fault prompts or temporary emergency modes are not provided is avoided. Therefore, safety accidents such as congestion of roads around the vehicle and rear-end collision are avoided, and the user friendliness is improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile control technology, and in particular to a speed and torque limiting control method, system and vehicle. Background Art

[0002] When a vehicle's onboard diagnostic system detects that emissions exceed standards, it will limit the speed and torque of the vehicle's engine to reduce the vehicle's exhaust emissions, while reminding the owner to repair the vehicle in a timely manner.

[0003] At present, after the speed and torque of the vehicle's engine are limited, the engine's output torque and maximum speed will be restricted, the vehicle's power will be reduced, and it can only maintain a relatively low speed. The vehicle with speed and torque limit needs to be repaired at a maintenance station or the fault code is eliminated before the speed and torque limit of the engine can be lifted. However, if the vehicle is limited in speed and torque when traveling on a city road with heavy traffic, it will cause congestion on the road; if the vehicle is limited in speed and torque on a highway, because other vehicles on the highway maintain high speed, the speed and power of the vehicle after speed and torque limit remain at a low level, which will cause the risk of vehicle safety accidents such as rear-end collisions, and after a traffic accident on the highway, the high cost of rescue vehicle towing may be borne. Therefore, the problems in the existing speed and torque limit strategies need to be solved urgently. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a speed and torque limit control method, system and vehicle, which are used to solve the problems of road congestion or vehicle safety accidents that may be caused after limiting the speed and torque of the vehicle in the prior art.

[0005] In order to achieve the above-mentioned object and other related objects, the present invention provides a speed and torque limiting control method, comprising:

[0006] Step S110: receiving a command to release the vehicle speed and torque limit;

[0007] Step S120: Based on the instruction to release the vehicle speed and torque limit, the speed and torque limit of the vehicle are released, and timing is started until the timing duration reaches a preset timing duration, the timing is reset, and the vehicle is speed-limited and torque-limited.

[0008] In an exemplary embodiment, when receiving a command to release the vehicle speed and torque limit, a speed and torque limit fault type is obtained;

[0009] If the speed and torque limit fault type is excessive exhaust emissions or a false alarm of the exhaust sensor, proceed to step S120;

[0010] If the speed and torque limit fault type is not excessive exhaust emissions or false alarm of the exhaust sensor, the speed and torque limit state will be maintained.

[0011] In an exemplary embodiment, if the speed and torque limit fault type is not excessive exhaust emissions or a false alarm of the exhaust sensor, the speed and torque limit state is maintained, and a prompt tone is used to inform the user that the speed and torque limit of the vehicle cannot be released.

[0012] In an exemplary embodiment, after limiting the speed and torque of the vehicle, the method includes:

[0013] Step S110 and step S120 are executed cyclically, and the number of releases is recorded until the number of times the speed and torque limit of the vehicle is released reaches a preset number of releases, and the speed and torque limit of the vehicle is limited and maintained.

[0014] In an exemplary embodiment, after the fault code generated in the speed and torque limiting is eliminated, the speed and torque limiting of the vehicle is released, and the number of times the release is reset to zero.

[0015] In an exemplary embodiment, the command to release the vehicle speed and torque limit includes a voice command or an action command.

[0016] In an exemplary embodiment, when a command to release the vehicle speed limit and torque limit is received, a prompt signal is used to remind the user that the vehicle needs to enter a service station for maintenance.

[0017] In an exemplary embodiment, the prompt signal includes sound and / or light and / or display screen.

[0018] The present invention provides a speed and torque limiting control system, comprising:

[0019] A receiving and obtaining module, the receiving and obtaining module is used to receive a command to release a vehicle speed limit and torque limit;

[0020] The analysis execution module is used to release the speed and torque limit of the vehicle based on the instruction to release the vehicle speed and torque limit, and start timing until the timing reaches a preset timing duration, the timing is reset, and the vehicle is speed-limited and torque-limited.

[0021] The present invention provides a vehicle that executes the speed and torque limiting control method as described above.

[0022] As described above, the speed and torque limiting control method, system and vehicle of the present invention have the following beneficial effects:

[0023] By receiving the command to lift the vehicle speed and torque limit, the speed and torque limit of the vehicle can be temporarily lifted, allowing the user to drive normally within a certain period of time and drive the vehicle into a service station for maintenance. This can avoid the vehicle being unable to be used normally due to sudden speed and torque limit without providing sufficient fault warnings or temporary emergency modes, causing congestion on the roads around the vehicle and causing safety accidents such as rear-end collisions, thereby improving user-friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a flow chart of a speed and torque limiting control method according to an embodiment of the present invention.

[0025] Figure 2 It is a flow chart showing the release times of 3 in the speed and torque limiting control method according to an embodiment of the present invention.

[0026] Figure 3 Shown is a block diagram of a speed and torque limiting control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] See also Figures 1 to 3 It should be noted that the diagrams provided in the present embodiment only illustrate the basic concept of the present invention in a schematic manner. The diagrams only show the components related to the present invention rather than the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. shown in the drawings of the present specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0029] Before describing the embodiments of the present invention in detail, the background and triggering conditions of speed and torque limiting of vehicles are briefly introduced. Vehicle speed and torque limiting are formulated in response to the National VI emission standards. They are emission limiting measures used to reduce vehicle emissions and remind users to repair them in time, so as to force the reduction of vehicle pollutant emissions through technical means. Speed ​​limiting means limiting the maximum speed of the vehicle, usually to a reduced level, such as 20-30km / h (kilometers per hour); torque limiting means limiting the output torque of the engine, which can reduce the power of the vehicle. The triggering conditions for speed and torque limiting include the following four:

[0030] Vehicle exhaust emissions exceed the standard;

[0031] Key component failure: such as failure of the catalyst, oxygen sensor, EGR (Exhaust Gas Re-circulation) system, etc.

[0032] Urea system problems: Diesel vehicle urea injection system failure or insufficient urea level;

[0033] The DPF (Diesel Particulate Filter) is clogged.

[0034] The above reasons will trigger the speed and torque limit of the vehicle and generate fault codes. All of them require entering the service station for repair. Only after the repair is completed can the fault code be eliminated and the speed and torque limit state of the vehicle be released. In actual application, there are also cases where the OBD (On-Board Diagnostics) system triggers the speed and torque limit due to sensor false alarms, temporary faults (such as short-term fluctuations in urea liquid level), etc., resulting in the performance of the vehicle being restricted when there is no actual hardware fault. In the above cases, the vehicle will also generate a fault code. Since the vehicle has no actual hardware fault, after entering the service station, only the fault code needs to be eliminated to release the speed and torque limit state of the vehicle.

[0035] From the above, it can be seen that there are many reasons for triggering the speed and torque limit of the vehicle, and after the speed and torque of the vehicle are limited, the vehicle can only travel at a reduced speed and power. At this time, the vehicle must travel at a low speed to a service station for repair or eliminate the fault code before the speed and torque limit of the vehicle can be resolved. However, during the above-mentioned low-speed driving process, if the vehicle is located on a city road section with heavy traffic, it is easy to cause congestion on the road section; if it is driving on a highway, because the speed of the vehicle is low after the speed and torque are limited, and the driving speeds of other vehicles are generally high, it is very easy to cause traffic accidents such as rear-end collisions. Before the speed and torque of the vehicle are limited, it is particularly important to give the user sufficient fault prompts and provide a temporary emergency mode. Therefore, the technical solution of the present invention is proposed to solve the problems of road congestion or vehicle safety accidents that may be caused after the speed and torque of the vehicle are limited. The technical solution of the present invention is explained below:

[0036] like Figure 1 and Figure 2 As shown, the present invention provides a speed and torque limiting control method, comprising:

[0037] Step S110: receiving a command to release the vehicle speed and torque limit.

[0038] In an exemplary embodiment, the instruction to release the vehicle speed and torque limit is an action instruction, and a button for releasing the vehicle speed and torque limit is set in the vehicle. When the vehicle is limited in speed and torque, the user presses the above button to restore the vehicle to normal use and driving state.

[0039] In an exemplary embodiment, the instruction to release the speed and torque limit of the vehicle is a voice instruction, and the vehicle can receive the voice instruction of the user. When the vehicle issues an inquiry on whether to release the speed and torque limit of the vehicle, for example, after the vehicle issues a voice message "Excuse me, do you need to release the speed and torque limit of the vehicle?", if the user replies "yes", the speed and torque limit of the vehicle is released, and if the user replies "no" or "no", the speed and torque limit state of the vehicle is maintained. Alternatively, after the vehicle issues the above inquiry, if no reply from the user is received within the preset inquiry waiting time, the speed and torque limit of the vehicle is automatically released.

[0040] Step S120: Based on the instruction to release the vehicle speed and torque limit, the speed and torque limit of the vehicle are released, and timing is started until the timing duration reaches a preset timing duration, the timing is reset, and the vehicle is speed-limited and torque-limited.

[0041] In an exemplary embodiment, when a command to release the vehicle speed and torque limit is received, the speed and torque limit fault type is obtained; if the speed and torque limit fault type is excessive exhaust emissions or a false alarm of the exhaust sensor, step S120 is performed; if the speed and torque limit fault type is not excessive exhaust emissions or a false alarm of the exhaust sensor, the speed and torque limit state is maintained.

[0042] Since the speed and torque limit fault type is the exhaust sensor false alarm or the exhaust emission exceeds the standard, the above fault will not affect the vehicle's driving safety to a certain extent, so in the case of the above fault, the user is allowed to release the speed and torque limit of the vehicle. If the speed and torque limit fault type is caused by oil leakage, throttle stuck, supercharger damage, etc., the above fault is very likely to cause traffic safety accidents, so in the case of the above fault, the user is not allowed to release the speed and torque limit of the vehicle, and the user is required to contact relevant personnel in time to deal with it to avoid causing traffic accidents.

[0043] In an exemplary embodiment, since a short-term fluctuation of the urea liquid level can be automatically restored after a certain period of time, the user is allowed to release the speed and torque limit of the vehicle when the speed and torque limit fault type is a short-term fluctuation of the urea liquid level.

[0044] In an exemplary embodiment, if the speed and torque limit fault type is not excessive exhaust emissions or a false alarm of the exhaust sensor, the speed and torque limit state is maintained, and a prompt tone is used to inform the user that the speed and torque limit of the vehicle cannot be released. For example, a prompt tone is broadcast in the vehicle, "The speed and torque limit of the vehicle cannot be released, please contact relevant personnel in time for processing", or a short beep is used to inform the user that the speed and torque limit of the vehicle cannot be released.

[0045] In an exemplary embodiment, when receiving a command to release the speed and torque limit of the vehicle, a prompt signal is used to remind the user that the vehicle needs to enter a service station for repair. The purpose of releasing the speed and torque limit state of the vehicle is to allow the user to send the vehicle to a service station for repair or to eliminate the fault code in a normal driving state within a limited time. The prompt signal is used to remind the user to drive into the service station as soon as possible. For example, by displaying "Please drive into the service station for repair immediately!" on the display screen of the vehicle, or by broadcasting "Please drive into the service station for repair immediately" through voice in the vehicle, the type of prompt signal can be adjusted according to actual usage needs.

[0046] In an exemplary embodiment, when a command to release the vehicle speed and torque limit is received, a service station near the vehicle's location is searched, the service stations are presented to the user through the in-vehicle display screen, and the user is prompted to select one of the service stations. The user clicks on the logo of the corresponding service station on the screen, receives the above user command, and finds the best driving route to the service station, so that the user can drive the vehicle to the service station faster for maintenance and / or eliminate obstacle codes.

[0047] In another exemplary embodiment, when the speed and torque of the vehicle are limited for the first time, the system starts searching for service stations near the vehicle's location, obtains route maps and road condition information for each service station, and obtains the travel time required to reach each service station. Based on the travel time, the location of the service station with the shortest travel time is obtained, and the route planning of the service station is presented to the user through the in-vehicle display screen, so that the user can drive the vehicle to the service station faster for maintenance and / or eliminate obstacle codes.

[0048] In an exemplary embodiment, after the speed limit and torque limit are released, the vehicle obtains the vehicle's travel distance by obtaining the rotation speed of the wheels, and when the travel distance reaches the preset release distance, the vehicle is speed-limited and torque-limited. When receiving the instruction to release the vehicle's speed limit and torque limit or when the vehicle is speed-limited and torque-limited for the first time, a service station near the vehicle's location is searched, and a route map of each service station is obtained to obtain the mileage required to reach each service station. Based on the mileage, the location of the service station with the shortest mileage is obtained, and the route planning of the service station is presented to the user through the in-vehicle display screen, so that the user can drive the vehicle to the service station with the shortest travel distance for maintenance and / or obstacle removal.

[0049] In an exemplary embodiment, after limiting the speed and torque of the vehicle, step S210 is included.

[0050] Step S210: cyclically execute step S110 and step S120, and record the number of times the speed and torque limit of the vehicle is released, until the number of times reaches the preset number of times, the speed and torque of the vehicle is limited and maintained in the speed and torque limit state.

[0051] In an exemplary embodiment, the preset number of releases is 4, and the preset timing duration is 1800s (seconds). After the speed limit and torque limit are released, the internal logic speed limit and torque limit counter of the ECU (Electronic Control Unit) increases from 0 to 1, and the number of releases is 1. At the same time, the speed limit and torque limit timer starts timing. At this time, the vehicle can drive normally after the speed limit and torque limit are released. When the timer reaches 1800 seconds, if the vehicle does not enter the maintenance station for maintenance, the timer is reset, and the speed limit and torque limit will be activated again. After repeating the above operation, the counter increases from 1 to 2, and the number of releases is 2. The timer will count from 0 to 1800s again until the above process is repeated 3 times. After the counter accumulates to 4, the speed limit and torque limit of the vehicle will no longer be able to be released. At this time, the vehicle will remain in the speed limit and torque limit state until the vehicle enters the maintenance station for maintenance.

[0052] In an exemplary embodiment, after the fault code generated in the speed and torque limit is eliminated, the speed and torque limit of the vehicle is released, and the number of releases is reset to 0. After the vehicle enters the service station for repair and the fault code is eliminated or only the fault code is eliminated, the number of releases of the vehicle is reset to 0, so that the vehicle can enter the service station faster by temporarily releasing the speed and torque limit state after the speed and torque limit is triggered next time, thereby avoiding traffic congestion or traffic accidents.

[0053] To summarize, by receiving the command to release the vehicle speed and torque limit, the speed and torque limit of the vehicle can be temporarily released, allowing the user to drive normally within a certain period of time and drive the vehicle into a service station for maintenance. This avoids the vehicle being unable to be used normally due to sudden speed and torque limit without providing sufficient fault warnings or temporary emergency modes, causing congestion on the roads around the vehicle and causing safety accidents such as rear-end collisions, thereby improving user-friendliness.

[0054] like Figure 3 As shown, the present invention provides a speed and torque limiting control system, comprising:

[0055] The receiving and obtaining module 310 is used to receive a command for releasing the vehicle speed and torque limit.

[0056] The analysis execution module 320 is used to release the speed and torque limit of the vehicle based on the instruction to release the vehicle speed and torque limit, and start timing until the timing reaches a preset timing duration, the timing is reset, and the vehicle is speed-limited and torque-limited.

[0057] The present invention also provides a vehicle that executes the speed and torque limiting control method as described above.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A speed and torque limiting control method, characterized in that: include: Step S110: receiving a command to release the vehicle speed and torque limit; Step S120: Based on the instruction to release the vehicle speed and torque limit, the speed and torque limit of the vehicle are released, and timing is started until the timing duration reaches a preset timing duration, the timing is reset, and the vehicle is speed-limited and torque-limited.

2. The speed and torque limiting control method according to claim 1, characterized in that: When receiving a command to release the vehicle speed limit and torque limit, the speed limit and torque limit fault type is obtained; If the speed and torque limit fault type is excessive exhaust emissions or a false alarm of the exhaust sensor, proceed to step S120; If the speed and torque limit fault type is not excessive exhaust emissions or false alarm of the exhaust sensor, the speed and torque limit state will be maintained.

3. The speed and torque limiting control method according to claim 2, characterized in that: If the speed and torque limit fault type is not excessive exhaust emissions or false alarm of the exhaust sensor, the speed and torque limit state will be maintained, and the user will be informed through a prompt sound that the speed and torque limit of the vehicle cannot be lifted.

4. The speed and torque limiting control method according to claim 1, characterized in that: After limiting the speed and torque of the vehicle, it includes: Step S110 and step S120 are executed cyclically, and the number of times the speed and torque limit of the vehicle are released is recorded, until the number of times reaches a preset number, the speed and torque limit of the vehicle is limited and maintained.

5. The speed and torque limiting control method according to any one of claims 1 to 4, characterized in that: After eliminating the fault code generated in the speed and torque limit, the speed and torque limit of the vehicle are released, and the number of releases is reset to zero.

6. The speed and torque limiting control method according to any one of claims 1 to 4, characterized in that: The instruction for releasing the vehicle speed limit and torque limit includes a voice instruction or an action instruction.

7. The speed and torque limiting control method according to any one of claims 1 to 4, characterized in that: When receiving a command to release the vehicle speed limit and torque limit, a prompt signal is used to remind the user that the vehicle needs to enter a service station for maintenance.

8. The speed and torque limiting control method according to claim 7, characterized in that: The prompt signal includes sound and / or light and / or display screen display.

9. A speed and torque limiting control system, characterized in that: include: A receiving and obtaining module, the receiving and obtaining module is used to receive a command to release a vehicle speed limit and torque limit; The analysis execution module is used to release the speed and torque limit of the vehicle based on the instruction to release the vehicle speed and torque limit, and start timing until the timing reaches a preset timing duration, the timing is reset, and the vehicle is speed-limited and torque-limited.

10. A vehicle, characterized in that: Execute the speed and torque limiting control method as described in any one of claims 1-8.

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