CN115027478A - Vehicle driving mode switching method and system and vehicle - Google Patents

Vehicle driving mode switching method and system and vehicle Download PDF

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Publication number
CN115027478A
CN115027478A CN202111295636.XA CN202111295636A CN115027478A CN 115027478 A CN115027478 A CN 115027478A CN 202111295636 A CN202111295636 A CN 202111295636A CN 115027478 A CN115027478 A CN 115027478A
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vehicle
parameter value
mode
state parameter
driving mode
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CN202111295636.XA
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Chinese (zh)
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王建
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Great Wall Motor Co Ltd
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Great Wall Motor Co Ltd
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Priority to CN202111295636.XA priority Critical patent/CN115027478A/en
Publication of CN115027478A publication Critical patent/CN115027478A/en
Priority to PCT/CN2022/129428 priority patent/WO2023078322A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/119—Conjoint control of vehicle sub-units of different type or different function including control of all-wheel-driveline means, e.g. transfer gears or clutches for dividing torque between front and rear axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/02—Control of vehicle driving stability
    • B60W30/04—Control of vehicle driving stability related to roll-over prevention
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/082—Selecting or switching between different modes of propelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B60W2520/105—Longitudinal acceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/28—Wheel speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/84—Data processing systems or methods, management, administration

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)

Abstract

The invention provides a vehicle running mode switching method, a vehicle running mode switching system and a vehicle, wherein the method comprises the following steps: under the condition that a vehicle is currently in a first driving mode, acquiring a first driving parameter value of the vehicle; when the first running parameter value exceeds a preset threshold value, acquiring a running state parameter value of the vehicle; and when the operating state parameter value is in a first operating state parameter value range, controlling the vehicle to be switched from a first driving mode to a second driving mode corresponding to the first operating state parameter value range, wherein the vehicle is operated more safely in the second driving mode than in the first driving mode within the first operating state parameter value range. The method aims to control the vehicle to be switched from the current driving mode to a safer driving mode corresponding to the current running state parameter of the vehicle according to the running state parameter of the vehicle so as to reduce the risk of accidents of the vehicle.

Description

Vehicle driving mode switching method and system and vehicle
Technical Field
The invention relates to the field of vehicle engineering, in particular to a vehicle running mode switching method and system and a vehicle.
Background
The transfer case is an important component of an automobile power system, and mainly has the functions of distributing power transmitted by power to a front transmission shaft and a rear transmission shaft and transmitting torque to 4 wheels through a main reducer and a driving shaft, so that four-wheel drive is realized. The transfer generally includes a high-speed drive mode and a low-speed drive mode. The high-speed driving mode comprises an intelligent four-wheel driving mode, a high-speed two-wheel driving mode and a high-speed four-wheel driving mode. By switching the mode of the transfer case, the dynamic property and the fuel economy of the vehicle under different road conditions can be improved.
The road conditions suitable for different driving modes are different, and the switching between the existing driving modes needs to be carried out by clicking the keys by the driver according to the judgment of the driver on the road conditions. For a driver who does not know enough about different driving modes of a vehicle, switching among various modes cannot be accurately grasped according to the judgment of road conditions.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for switching a vehicle driving mode, and a vehicle, aiming to control the vehicle to switch from a current driving mode to a safer driving mode corresponding to a current driving state parameter of the vehicle according to the operating state parameter of the vehicle, so as to reduce the risk of vehicle accidents.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle travel mode switching method, the method comprising:
under the condition that a vehicle is currently in a first driving mode, acquiring a first driving parameter value of the vehicle;
when the first running parameter value exceeds a preset threshold value, acquiring a running state parameter value of the vehicle;
and when the operating state parameter value is in a first operating state parameter value range, controlling the vehicle to be switched from a first driving mode to a second driving mode corresponding to the first operating state parameter value range, wherein the vehicle is operated more safely in the second driving mode than in the first driving mode within the first operating state parameter value range.
Further, after controlling the vehicle to switch from a first driving mode to a second driving mode corresponding to the first operating state parameter value range, the method further comprises:
and when the acquired running state parameter value of the vehicle is in a second running state parameter value range, controlling the vehicle to be switched from a second driving mode to a first driving mode corresponding to the second running state parameter value range, wherein the vehicle runs more safely in the first driving mode than in the second driving mode within the second running state parameter value range.
Further, in a case where the vehicle is currently in the first driving mode, before acquiring the first driving parameter value of the vehicle, the method further includes:
detecting the starting operation of a user on an expert mode key of the vehicle, wherein the expert mode key is used for controlling the starting or stopping of a vehicle running mode switching method;
and starting detection on whether the vehicle is currently in a first driving mode or not under the condition that the starting operation of the expert mode key of the vehicle by the user is not detected.
Further, the first driving mode comprises a high-speed four-wheel drive mode, and the second driving mode comprises an intelligent four-wheel drive mode.
Further, the operating state parameter values include: yaw angular acceleration of the vehicle, a difference in wheel speed between front and rear wheels of the vehicle, and a vehicle speed of the vehicle;
the first operating condition parameter value range includes: the longitudinal acceleration of the vehicle is less than 3m/s2, the yaw angular acceleration of the vehicle is less than 2m/s2, the wheel speed difference of front and rear wheels of the vehicle is less than 3.5%, and the vehicle speed of the vehicle is more than or equal to 90 km/h;
the second operating condition parameter range includes: the longitudinal acceleration of the vehicle is less than 3m/s2, the yaw angular acceleration of the vehicle is less than 2m/s2, the wheel speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5%, and the vehicle speed of the vehicle is less than or equal to 60 km/h.
Further, the method further comprises:
when the first running parameter value exceeds a preset threshold value, outputting corresponding first warning information;
when the operating state parameter value is in a first operating state parameter value range, outputting corresponding first prompt information;
and after the vehicle is switched from the first driving mode to the second driving mode, when the acquired running state parameter value of the vehicle is in the second running state parameter value range, outputting corresponding second prompt information.
The vehicle running mode switching method has the following advantages:
according to the vehicle driving mode switching method provided by the invention, when a driver with insufficient knowledge of the driving mode of the vehicle uses the first driving mode to lock, and after the first driving parameter of the vehicle exceeds the preset threshold value, the transfer case is controlled to release the locking of the first driving mode, and the first driving mode is switched to the safer second driving mode corresponding to the current running state parameter value of the vehicle, so that the probability of safety accidents is reduced.
According to the vehicle driving mode switching method provided by the invention, the limiting condition when the running state parameter value of the vehicle is in the first running state parameter value range is set, so that the accuracy of switching from the first driving mode to the second driving mode is improved, and the bad driving experience such as impact/torque failure and the like brought to a driver in the mode switching process is reduced.
Another object of the present invention is to provide a vehicle driving mode switching system, which is intended to control the vehicle to switch from the current driving mode to a safer driving mode corresponding to the current driving state parameter of the vehicle according to the operating state parameter of the vehicle, so as to reduce the risk of vehicle accidents.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle travel mode switching system, the system comprising:
the system comprises a first data acquisition module, a second data acquisition module and a control module, wherein the first data acquisition module is used for acquiring a first driving parameter value of a vehicle under the condition that the vehicle is currently in a first driving mode;
the second data acquisition module is used for acquiring the running state parameter value of the vehicle when the first running parameter value exceeds a preset threshold value;
the control module is used for controlling the vehicle to be switched from a first driving mode to a second driving mode corresponding to a first operating state parameter value range when the operating state parameter value is in the first operating state parameter value range, wherein the vehicle is safer to operate in the second driving mode than in the first driving mode within the first operating state parameter value range.
The vehicle running mode switching system has the same advantages as the vehicle running mode switching method, and is not described herein again.
Another object of the present invention is to provide a vehicle, which is designed to control the vehicle to switch from a current driving mode to a safer driving mode corresponding to a current driving state parameter of the vehicle according to the driving state parameter of the vehicle, so as to reduce the risk of vehicle accidents.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle, comprising: the vehicle running mode switching system is configured to execute the steps in the vehicle running mode switching method.
The vehicle has the same advantages as the vehicle running mode switching system, and the description is omitted here.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart illustrating a vehicle driving mode switching method according to an embodiment of the present application;
fig. 2 is a control diagram illustrating a vehicle driving mode switching method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a vehicle driving mode switching system according to an embodiment of the present application;
fig. 4 is a block connection diagram of a vehicle driving mode switching system according to an embodiment of the present application;
fig. 5 is a signal representation diagram of a module in a vehicle travel mode switching system according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example one
Fig. 1 is a flowchart illustrating a vehicle driving mode switching method according to an embodiment of the present application. Referring to fig. 1, the vehicle driving mode switching method provided by the present application includes the steps of:
step S11: in a case where a vehicle is currently in a first drive mode, a first driving parameter value of the vehicle is acquired.
In the embodiment, on the vehicle with the time-sharing four-wheel drive function, the vehicle can be controlled to be manually switched among various drive modes according to the intention of the driver. Since the applicable range of different driving modes is different, in a driving state, selecting the wrong driving mode may cause an accident. Therefore, the present application initiates, in a case where the vehicle is currently in the first driving mode, detection of the first driving parameter value of the vehicle for determining whether the first driving parameter value of the vehicle in the first driving mode is lower than a preset threshold value to determine whether it is safe for the vehicle to travel in a state of the current first driving parameter value.
Alternatively, in the present application, the first driving parameter value is preferably a vehicle speed of the vehicle. In addition, in order to more accurately determine whether it is safe for the vehicle to travel in the current state of the first travel parameter value, the optional first travel parameter value includes a plurality of values, specifically, the vehicle speed of the vehicle, the longitudinal acceleration of the vehicle, the yaw angular acceleration of the vehicle, the wheel speed difference between the front and rear wheels of the vehicle, and the like, and respective preset threshold values are set for the plurality of values of the first travel parameter. And when the first running parameter values are respectively lower than the respective preset threshold values, determining that the vehicle is currently in a safe state.
Step S12: and when the first running parameter value exceeds a preset threshold value, acquiring a running state parameter value of the vehicle.
In the present embodiment, the first running parameter value is explained as the vehicle speed of the vehicle. In the first driving mode, when the running speed of the vehicle exceeds a preset threshold, at this time, the vehicle has a certain potential safety hazard but does not form a substantial potential safety hazard, and only alarm prompt information needs to be output to a user to prompt the user to carry out deceleration running and continuously monitor the running state of the vehicle. After the user timely performs the corresponding deceleration operation, the vehicle can maintain the locking state of the first driving mode, and when the user does not perform the corresponding deceleration operation, the vehicle speed continuously exceeds a preset threshold for a certain period of time or the vehicle continuously increases the speed to exceed another preset threshold, the locking of the first driving mode needs to be released, that is, the current first driving mode is exited, and the first driving mode is switched to the second driving mode, so as to reduce the probability of accidents of the vehicle. When the speed of the vehicle continuously exceeds a preset threshold value for a certain time or the vehicle continuously accelerates to exceed another preset threshold value, the first driving mode is directly unlocked and switched to the second driving mode, so that the vehicle is shaken, impacted, twisted off and the like, and poor driving experience is caused to a driver. Therefore, when the vehicle running speed exceeds another preset threshold value and other running state parameters of the vehicle meet specific requirements, the locking of the first driving mode is released, and the first driving mode is switched to the second driving mode. When the vehicle running speed exceeds another preset threshold value, and other running state parameters of the vehicle meet specific requirements, the locking of the first driving mode is released, and the first driving mode is switched to the second driving mode, so that the conditions of vehicle shaking, impact, torque failure and the like are effectively avoided, and better driving experience is brought to a driver. Therefore, in the first driving mode, when the running speed of the vehicle exceeds the preset threshold, the warning prompt message is sent out, and the monitoring of the running state parameter value of the vehicle is started to obtain the running state parameter value of the vehicle. Another preset threshold is included in the operating condition parameter value.
In this embodiment, the preset threshold is preferably 80Km/h, and another preset threshold is set to 9080Km/h, it should be understood that the preset threshold and another preset threshold are only corresponding preferred values, and may be set to other values according to actual requirements.
In this embodiment, when the first driving parameter value includes the plurality of different types of state parameters, and in the first driving mode, when the plurality of first driving parameter values of the vehicle respectively exceed respective preset threshold values at the same time, the monitoring of the driving state parameter value of the vehicle is started to obtain the driving state parameter value of the vehicle.
In this application, the method further comprises: and outputting corresponding first warning information when the first running parameter value exceeds a preset threshold value.
In this embodiment, when the vehicle is currently in the first driving mode and the first driving parameter value of the vehicle exceeds the preset threshold value, the vehicle actually has a driving safety hazard, at this time, the warning information that the vehicle speed is too fast and the vehicle speed is required to be reduced in the current first driving mode can be directly sent to the driver through the display instrument of the vehicle, and if the vehicle speed is reduced in time by the driver, the subsequent operation of unlocking the first driving mode can be avoided, and the vehicle is continuously kept in the locked state of the first driving mode. If the driver does not reduce the vehicle speed in time, whether the locking of the first driving mode needs to be released or not needs to be determined according to the monitored running state parameter value of the vehicle, and the first driving mode is switched to a safer second driving mode.
Step S13: and when the operating state parameter value is in a first operating state parameter value range, controlling the vehicle to be switched from a first driving mode to a second driving mode corresponding to the first operating state parameter value range, wherein the vehicle is operated more safely in the second driving mode than in the first driving mode within the first operating state parameter value range.
In this embodiment, when it is detected that the plurality of operating state parameter values of the vehicle are respectively in the respective first operating state parameter value ranges, it may be determined that the user does not control the vehicle to perform the deceleration operation, at this time, the vehicle speed of the vehicle has already reached another preset threshold value at which the driving mode switching may be performed, and at the same time, the plurality of operating state parameters of the vehicle other than the another preset threshold value have also reached a state at which the driving mode switching may be performed without causing the occurrence of conditions such as shaking, impact, torque interruption, and the like, at this time, the vehicle is controlled to release the locking state of the first driving mode, and the vehicle is controlled to be switched from the first driving mode to a safer second driving mode corresponding to the current first operating state parameter value range, so that the probability of the vehicle occurring an accident is reduced.
In the present application, the method further comprises: and outputting corresponding first prompt information when the operating state parameter value is in a first operating state parameter value range.
In the embodiment, when the acquired running state parameter value of the vehicle is in the first running state parameter value range through monitoring, the vehicle is controlled to unlock the first driving mode, the vehicle is controlled to be switched from the first driving mode to the second driving mode, and then the prompt message that the locking state of the first driving mode is unlocked is output on the display instrument of the vehicle.
In the present application, the method further comprises: when the acquired running state parameter value of the vehicle is in a second running state parameter value range, controlling the vehicle to be switched from a second driving mode to a first driving mode corresponding to the second running state parameter value range, wherein the vehicle runs more safely in the first driving mode than in the second driving mode within the second running state parameter value range.
In the embodiment, in order to avoid that the running speed of the vehicle exceeds the preset threshold value due to only transient misoperation of the vehicle, and meanwhile, the running state parameter value of the vehicle is in the first running state parameter value range, so that the vehicle is switched from the first driving mode to the second driving mode, the running state parameter value of the vehicle is continuously detected in real time after the vehicle is switched from the first driving mode to the second driving mode, and when the running state parameter of the vehicle is restored to the running state parameter range adapted to the first driving mode, the vehicle is controlled to be switched back from the second driving mode to the first driving mode. When the running state parameter value of the vehicle is in the second running state parameter value range, the vehicle is controlled to be switched from the second driving mode to the first driving mode, and the locking state of the first driving mode is recovered. When the running state parameter value of the vehicle is in the second running state parameter value range, the vehicle is controlled to be switched from the second driving mode to the first driving mode, and the conditions of vehicle shaking, impact, torque failure and the like are avoided in the process of switching from the second driving mode to the first driving mode.
In the present application, the method further comprises: and after the vehicle is switched from the first driving mode to the second driving mode, when the acquired running state parameter value of the vehicle is in the second running state parameter value range, outputting corresponding second prompt information.
In this embodiment, after the vehicle is switched from the first driving mode to the second driving mode, the running state parameter value of the vehicle is continuously detected in real time, and when the running state parameter value of the vehicle is monitored to be within the second running state parameter value range, the vehicle is controlled to be switched from the second driving mode to the first driving mode. After switching to the first drive mode, the locked state of the first drive mode is restored, and then a prompt message that the locked state of the first drive mode has been restored is output on a display meter of the vehicle.
In this application, before acquiring the first driving parameter value of the vehicle in a case where the vehicle is currently in the first driving mode, the method further includes: detecting the starting operation of a user on an expert mode key of the vehicle, wherein the expert mode key is used for controlling the starting or stopping of a vehicle running mode switching method; and starting detection on whether the vehicle is currently in a first driving mode or not under the condition that the starting operation of the expert mode key of the vehicle by the user is not detected.
In the embodiment, the starting operation of a user on an expert mode key of the vehicle is detected, wherein the expert mode key is used for controlling the starting or stopping of the vehicle running mode switching method; and under the condition that the starting operation of the expert mode key of the vehicle by the user is not detected, restarting the detection of whether the vehicle is in the first driving mode currently.
The vehicle driving mode switching method is mainly directed to a driver who does not know the driving modes of the vehicle sufficiently or cannot accurately grasp the timing of switching between the driving modes. However, for a driver who can select an appropriate timing with skill and switch the driving mode of the vehicle by manual control, it may not be desirable to switch the first driving mode and the second driving mode with each other by the vehicle driving mode switching method described above in the present application. Therefore, an expert mode key is separately provided in a HUT (Head host) of the vehicle, the vehicle travel mode switching method described above in the present application is activated when the expert mode key is not activated by the driver, and the vehicle travel mode switching method described above in the present application is deactivated when the expert mode key is activated by the driver, and the switching between the respective drive modes continues to be manually controlled by the driver. Meanwhile, the expert mode of the vehicle has a higher priority than the switching commands of all the driving modes in the all-terrain mode. Therefore, it is first detected whether the user turns on the expert mode of the vehicle through the expert mode key of the vehicle. And when the expert mode of the vehicle is not detected to be started by the user, starting the detection on whether the vehicle is in the first driving mode currently, and determining whether to acquire the first driving parameter value of the vehicle according to the detection result. When the vehicle is not in the first driving mode, subsequent steps are not required to be executed; in a case where the vehicle is currently in the first drive mode, a first driving parameter value of the vehicle is acquired, and subsequent steps S12-S13 are performed.
According to the vehicle driving mode switching method provided by the invention, when a driver with unknown driving mode of the vehicle is locked by using the first driving mode, and after the first driving parameter of the vehicle exceeds the preset threshold value, the transfer case is controlled to release the locking of the first driving mode, and the first driving mode is switched to the safer second driving mode corresponding to the current running state parameter value of the vehicle, so that the probability of safety accidents is reduced.
According to the vehicle driving mode switching method, the limiting condition when the running state parameter value of the vehicle is in the first running state parameter value range is set, so that the accuracy of switching from the first driving mode to the second driving mode is improved, and poor driving experience such as impact, torque failure and the like brought to a driver in the mode switching process is reduced.
Example two
In this application, the first driving mode includes a high-speed four-wheel drive mode, and the second driving mode includes a smart four-wheel drive mode.
In the present embodiment, switching between the two high-speed four-wheel drive modes and the intelligent four-wheel drive mode is specifically described.
Step S21: in a case where a vehicle is currently in a first drive mode, a first driving parameter value of the vehicle is acquired.
In the embodiment, on the vehicle with the time-sharing four-wheel drive function, the vehicle can be controlled to be manually switched among various drive modes according to the intention of a driver. Since the applicable range of different driving modes is different, in a driving state, selecting the wrong driving mode may cause an accident. The high-speed four-wheel drive mode is mainly suitable for wet and slippery road surfaces such as snowfields, climbing slopes and mud fields. However, since the vehicle does not have a differential speed between axles in the high-speed four-wheel drive mode, steering braking of the vehicle is obvious during high-speed running, and if the vehicle runs at a high speed, the risk that the vehicle resonates or rolls over during turning is increased. Therefore, the method and the device start detection of the first running parameter value of the vehicle under the condition that the vehicle is currently in the high-speed four-wheel drive mode, and are used for determining whether the first running parameter value of the vehicle in the high-speed four-wheel drive mode is lower than a preset threshold value so as to determine whether the vehicle runs safely in the state of the current first running parameter value.
Alternatively, in the present application, since the high-speed four-wheel drive mode is sensitive to the vehicle speed of the vehicle, the first driving parameter value is preferably the vehicle speed of the vehicle. In addition, in order to more accurately determine whether it is safe for the current vehicle to travel in the state of the current first travel parameter value, the optional first travel parameter value includes a plurality of values, specifically, the vehicle speed of the vehicle, the longitudinal acceleration of the vehicle, the yaw angular acceleration of the vehicle, the difference in wheel speeds of the front and rear wheels of the vehicle, and the like, and respective preset thresholds are set for the plurality of first travel parameter values, respectively. And when the first running parameter values are respectively lower than the respective preset threshold values, determining that the vehicle is currently in a safe state.
Step S22: and when the first running parameter value exceeds a preset threshold value, acquiring a running state parameter value of the vehicle.
In the present embodiment, the first running parameter value is explained as the vehicle speed of the vehicle. In the high-speed four-wheel drive mode, when the running speed of the vehicle exceeds a preset threshold value, the vehicle has certain potential safety hazard at the moment, but the actual potential safety hazard is not formed, and only alarm prompt information needs to be output to a user to prompt the user to carry out deceleration running and continuously monitor the running state of the vehicle. After a user timely makes a corresponding deceleration operation, the vehicle can maintain a locking state of the high-speed four-wheel drive mode, and when the user does not make the corresponding deceleration operation, the vehicle speed continuously exceeds a preset threshold value for a certain time or the vehicle continuously increases to exceed another preset threshold value, the locking of the high-speed four-wheel drive mode needs to be released, namely the current high-speed four-wheel drive mode exits, and the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode, so that the probability of accidents of the vehicle is reduced. When the speed of the vehicle continuously exceeds a preset threshold value for a certain time or the vehicle continuously accelerates to exceed another preset threshold value, the locking of the high-speed four-wheel drive mode is directly released, the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode, the vehicle is subjected to the conditions of shaking, impact, torque failure and the like, and poor driving experience is caused to a driver. Therefore, when the running speed of the vehicle exceeds another preset threshold value and other running state parameters of the vehicle meet specific requirements, the locking of the high-speed four-wheel drive mode is released, and the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode. When the vehicle running speed exceeds another preset threshold value, and other running state parameters of the vehicle meet specific requirements, the locking of the high-speed four-wheel drive mode is released, and the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode, so that the conditions of vehicle shaking, impact, torque breaking and the like are effectively avoided, and better driving experience is brought to a driver. Therefore, in the high-speed four-wheel drive mode, when the running speed of the vehicle exceeds a preset threshold value, a warning prompt message is sent out, and monitoring of the running state parameter value of the vehicle is started to obtain the running state parameter value of the vehicle. Another preset threshold is included in the operating condition parameter value.
In this embodiment, when the first driving parameter value includes the plurality of different types of state parameters, and in the first driving mode, when the plurality of first driving parameter values of the vehicle respectively exceed respective preset thresholds at the same time, the monitoring of the driving state parameter value of the vehicle is started to obtain the driving state parameter value of the vehicle.
In the present application, the method further comprises: and outputting corresponding first warning information when the first running parameter value exceeds a preset threshold value.
In the embodiment, when the vehicle is currently in the high-speed four-wheel drive mode and the first running parameter value of the vehicle exceeds the preset threshold value, the vehicle has driving potential safety hazards, at this time, warning information that the vehicle speed is too high and the vehicle speed is required to be reduced under the current high-speed four-wheel drive mode can be directly sent to the driver through a display instrument of the vehicle, and if the vehicle speed is reduced in time by the driver, the follow-up unlocking operation of the high-speed four-wheel drive mode can be avoided, and the vehicle is continuously kept in the locking state of the high-speed four-wheel drive mode. And if the driver does not reduce the vehicle speed in time, determining whether the locking of the high-speed four-wheel drive mode needs to be released or not according to the monitored running state parameter value of the vehicle, and switching the high-speed four-wheel drive mode into the intelligent four-wheel drive mode.
Step S23: and when the running state parameter value is in a first running state parameter value range, controlling the vehicle to be switched from a high-speed four-wheel drive mode to an intelligent four-wheel drive mode.
In the embodiment, when a plurality of running state parameter values of the vehicle are detected to be in the respective first running state parameter value ranges, the vehicle is controlled to release the locking state of the high-speed four-wheel drive mode, and the vehicle is controlled to be switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode.
In the present application, the method further comprises: and outputting corresponding first prompt information when the running state parameter value is in a first running state parameter value range.
In this embodiment, when the acquired running state parameter value of the vehicle is in the first running state parameter value range through monitoring, the vehicle is controlled to unlock the high-speed four-wheel drive mode, the vehicle is controlled to be switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode, and then prompt information that the locking state of the high-speed four-wheel drive mode is unlocked is output on a display instrument of the vehicle.
In this application, the operating state parameter values include: yaw angular acceleration of the vehicle, a difference in wheel speed between front and rear wheels of the vehicle, and a vehicle speed of the vehicle; the first operating condition parameter value range includes: longitudinal acceleration of the vehicle < 3m/s 2 The yaw angular acceleration of the vehicle is less than 2m/s 2 The wheel speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent, and the vehicle speed of the vehicle is more than or equal to 90 km/h.
In the present embodiment, the running state parameter values of the vehicle include yaw angular acceleration of the vehicle, a difference in wheel speed between front and rear wheels of the vehicle, and a vehicle speed of the vehicle. Longitudinal acceleration of the vehicle is less than 3m/s 2 And yaw angular acceleration of the vehicle is less than 2m/s 2 And when the wheel speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent and the vehicle speed of the vehicle is more than or equal to 90km/h, controlling the vehicle to release the locking state of the high-speed four-wheel drive mode and controlling the vehicle to be switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode.
According to the vehicle running mode switching method provided by the invention, when a driver with an unknown driving mode of the vehicle uses the high-speed four-wheel drive mode to lock, and the vehicle speed is higher than a certain vehicle speed, the transfer case is controlled to release the locking of the high-speed four-wheel drive mode, and the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode, so that the inter-axle differential speed is realized, the steering brake of the vehicle is reduced, and the rollover risk of the vehicle is reduced.
According to the vehicle driving mode switching method provided by the invention, the limiting condition when the running state parameter value of the vehicle is in the first running state parameter value range is set, so that the accuracy of intelligent four-wheel-drive mode switching of the high-speed four-wheel-drive mode is improved, and the bad driving experience such as impact/torque failure and the like brought to a driver in the mode switching process is reduced. The intelligent four-wheel drive mode is a driving mode which can automatically identify the current driving environment of the vehicle and automatically switch between two-wheel drive modes and four-wheel drive modes according to the current driving environment.
In the present application, the method further comprises: and when the acquired running state parameter value of the vehicle is in a second running state parameter value range, controlling the vehicle to be switched from an intelligent four-wheel drive mode to a high-speed four-wheel drive mode.
In this embodiment, in order to avoid that the running speed of the vehicle exceeds the preset threshold value due to only short-term misoperation of the vehicle, and meanwhile, the running state parameter value of the vehicle is in the first running state parameter value range, so that the vehicle is switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode, after the vehicle is switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode, the running state parameter value of the vehicle is continuously detected in real time, and when the running state parameter of the vehicle is restored to the running state parameter range adapted to the high-speed four-wheel drive mode, the vehicle is controlled to be switched back to the high-speed four-wheel drive mode from the intelligent four-wheel drive mode. When the vehicle speed is reduced to the speed range suitable for the high-speed four-wheel drive mode and the running state parameter value of the vehicle is in the second running state parameter value range, the vehicle is controlled to be switched back to the high-speed four-wheel drive mode from the intelligent four-wheel drive mode, and the locking state of the high-speed four-wheel drive mode is recovered. When the running state parameter value of the vehicle is in the second running state parameter value range, the vehicle is controlled to be switched from the intelligent four-wheel drive mode to the high-speed four-wheel drive mode, and the situations of vehicle shaking, impact, torque failure and the like are avoided in the process of switching from the intelligent four-wheel drive mode to the high-speed four-wheel drive mode.
In the present application, the method further comprises: and after the vehicle is switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode, when the acquired running state parameter value of the vehicle is in a second running state parameter value range, outputting corresponding second prompt information.
In this embodiment, after the vehicle is switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode, the running state parameter value of the vehicle is continuously detected in real time, and when the running state parameter value of the vehicle is monitored to be within the second running state parameter value range, the vehicle is controlled to be switched from the intelligent four-wheel drive mode to the high-speed four-wheel drive mode. And after switching to the high-speed four-wheel drive mode, restoring the locking state of the high-speed four-wheel drive mode, and then outputting a prompt message that the locking state of the high-speed four-wheel drive mode is restored on a display instrument of the vehicle.
In this application, the second operating state parameter range includes: longitudinal acceleration of the vehicle < 3m/s 2 The yaw angular acceleration of the vehicle is less than 2m/s 2 The wheel speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent, and the vehicle speed of the vehicle is less than or equal to 60 km/h.
In the embodiment, after the vehicle is switched from the high-speed four-wheel drive mode to the intelligent four-wheel drive mode, the running state parameter value of the vehicle is continuously detected in real time. Longitudinal acceleration of the vehicle is less than 3m/s 2 And the yaw angular acceleration of the vehicle is less than 2m/s 2 And when the wheel speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent and the vehicle speed of the vehicle is less than or equal to 60km/h, controlling the vehicle to be switched from the intelligent four-wheel drive mode to the high-speed four-wheel drive mode and recovering the locking state of the high-speed four-wheel drive mode.
In this application, in a case where a vehicle is currently in a high-speed four-wheel drive mode, before acquiring a first driving parameter value of the vehicle, the method further includes: detecting the starting operation of a user on an expert mode key of the vehicle, wherein the expert mode key is used for controlling the starting or stopping of a vehicle running mode switching method; and starting detection on whether the vehicle is currently in a high-speed four-wheel drive mode or not under the condition that the starting operation of the expert mode key of the vehicle by the user is not detected.
In the embodiment, the starting operation of a user on an expert mode key of the vehicle is detected, wherein the expert mode key is used for controlling the starting or stopping of the vehicle running mode switching method; and under the condition that the starting operation of the expert mode key of the vehicle by the user is not detected, starting detection on whether the vehicle is in a high-speed four-wheel drive mode or not.
The vehicle driving mode switching method is mainly directed to a driver who does not know the driving modes of the vehicle sufficiently or cannot accurately grasp the timing of switching between the driving modes. However, for a driver who can select an appropriate timing with skill and switch the driving mode of the vehicle by manual control, it may not be desirable to switch between the high-speed four-wheel drive mode and the intelligent four-wheel drive mode by the vehicle driving mode switching method described in the present application. Therefore, an expert mode key is separately provided in a HUT (Head host) of the vehicle, the vehicle travel mode switching method described above in the present application is activated when the expert mode key is not activated by the driver, and the vehicle travel mode switching method described above in the present application is deactivated when the expert mode key is activated by the driver, and the switching between the respective drive modes is continuously controlled manually by the driver. Meanwhile, the expert mode of the vehicle has a higher priority than the switching commands of all the driving modes in the all-terrain mode. Therefore, it is first detected whether the user turns on the expert mode of the vehicle through the expert mode key of the vehicle. And when the expert mode that the vehicle is started by the user is not detected, starting the detection on whether the vehicle is in the high-speed four-wheel drive mode currently, and determining whether to acquire a first driving parameter value of the vehicle according to the detection result. When the vehicle is not in the high-speed four-wheel drive mode at present, the subsequent steps are not required to be executed; in a case where the vehicle is currently in the high-speed four-wheel drive mode, a first driving parameter value of the vehicle is acquired, and subsequent steps S22-S23 are performed.
In the present embodiment, fig. 2 is a control diagram of a vehicle travel mode switching method shown in an embodiment of the present application. Referring to fig. 2, an all-terrain mode signal and an expert mode signal sent by a key of a driver are acquired. And judging the expert mode signal through the transfer case control unit to determine whether the expert mode is activated. If so, the vehicle travel mode switching strategy described above is not used. If not, determining whether the vehicle is in a high-speed four-wheel drive mode or not through the all-terrain mode signal. And if the high-speed four-wheel drive mode is not adopted, returning to continuously acquire the all-terrain mode signal and the expert mode signal. If the vehicle is in the high-speed four-wheel drive mode, whether the running speed of the vehicle exceeds 80Km/h is judged. If the running speed of the vehicle exceeds 80Km/h, outputting the speed too fast, and calling for prompt information of speed reduction running, and simultaneously acquiring a wheel speed signal and acceleration information of the vehicle. If the longitudinal acceleration of the vehicle is < 3m/s 2 And the yaw angular acceleration of the vehicle is less than 2m/s 2 And if the speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent and the speed of the vehicle is more than or equal to 90km/h, the driver does not decelerate in time according to the indication information, at the moment, the prompt information for unlocking the high-speed four-wheel drive mode is output, the locking of the high-speed four-wheel drive mode is unlocked through the transfer case control unit, and the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode after the locking is unlocked. After the high-speed four-wheel drive mode is switched into the intelligent four-wheel drive mode, the running state parameters of the vehicle are continuously monitored, and if the longitudinal acceleration of the vehicle is less than 3m/s 2 And yaw angular acceleration of the vehicle is less than 2m/s 2 And if the speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent and the speed of the vehicle is less than or equal to 60km/h, the transfer case control unit controls the vehicle to be switched from the intelligent four-wheel drive mode to the high-speed four-wheel drive mode and outputs prompt information for recovering the locking of the high-speed four-wheel drive mode.
According to the vehicle running mode switching method provided by the invention, when a driver with an unknown driving mode of the vehicle uses the high-speed four-wheel drive mode to lock, and the vehicle speed is higher than a certain vehicle speed, the transfer case is controlled to release the locking of the high-speed four-wheel drive mode, and the high-speed four-wheel drive mode is switched to the intelligent four-wheel drive mode, so that the inter-axle differential speed is realized, the steering brake of the vehicle is reduced, and the rollover risk of the vehicle is reduced.
According to the vehicle driving mode switching method provided by the invention, the limiting condition when the running state parameter value of the vehicle is in the first running state parameter value range is set, so that the accuracy of intelligent four-wheel-drive mode switching of the high-speed four-wheel-drive mode is improved, and the bad driving experience such as impact/torque failure and the like brought to a driver in the mode switching process is reduced.
The vehicle driving mode switching method provided by the invention is characterized in that an expert mode key is arranged, and when the expert mode is not started through the expert mode key, the driving requirement of a driver, which is not known enough about the driving mode of the vehicle, is met through the vehicle driving mode switching method. When the expert mode is turned on by the expert mode button, the vehicle driving mode switching method is deactivated to meet the driving requirement of the driver with sufficient knowledge of the driving mode of the vehicle.
The embodiment of the invention also provides a vehicle running mode switching system. Fig. 3 is a schematic diagram of a vehicle driving mode switching system according to an embodiment of the present application. Referring to fig. 3, a vehicle travel mode switching system 300 provided by the present application includes:
the first data acquisition module 301 is configured to acquire a first driving parameter value of a vehicle when the vehicle is currently in a first driving mode;
the second data acquisition module 302 is configured to acquire a running state parameter value of the vehicle when the first running parameter value exceeds a preset threshold;
a control module 303, configured to, when the operating state parameter value is within a first operating state parameter value range, control the vehicle to switch from a first driving mode to a second driving mode corresponding to the first operating state parameter value range, where the vehicle is operated in the first operating state parameter value range, and the second driving mode is safer than the first driving mode.
Optionally, the vehicle driving mode switching system 300 further includes:
and the second control module is used for controlling the vehicle to be switched from a second driving mode to a first driving mode corresponding to a second operating state parameter value range when the acquired operating state parameter value of the vehicle is in the second operating state parameter value range, wherein the vehicle is safer to operate in the first driving mode than in the second driving mode within the second operating state parameter value range.
Optionally, the system 300 further comprises:
the starting module is used for detecting the starting operation of a user on an expert mode key of the vehicle, and the expert mode key is used for controlling the starting or stopping of a vehicle running mode switching method; and starting detection on whether the vehicle is currently in a first driving mode or not under the condition that the starting operation of the expert mode key of the vehicle by the user is not detected.
Optionally, the operating state parameter values collected by the second data collecting module 302 include: yaw angular acceleration of the vehicle, a difference in wheel speed between front and rear wheels of the vehicle, and a vehicle speed of the vehicle;
the first operating state parameter value range in the control module 303 includes: the longitudinal acceleration of the vehicle is less than 3m/s2, the yaw angular acceleration of the vehicle is less than 2m/s2, the wheel speed difference of front and rear wheels of the vehicle is less than 3.5%, and the vehicle speed of the vehicle is more than or equal to 90 km/h;
the second operating state parameter range in the second control module comprises: the longitudinal acceleration of the vehicle is less than 3m/s2, the yaw angular acceleration of the vehicle is less than 2m/s2, the wheel speed difference of front and rear wheels of the vehicle is less than 3.5 percent, and the vehicle speed of the vehicle is less than or equal to 60 km/h.
Optionally, the vehicle driving mode switching system 300 further includes:
the first output module is used for outputting corresponding first warning information when the first running parameter value exceeds a preset threshold value;
the second output module is used for outputting corresponding first prompt information when the running state parameter value is in the first running state parameter value range;
and the third output module is used for outputting corresponding second prompt information when the acquired running state parameter value of the vehicle is in a second running state parameter value range after the vehicle is switched from the first driving mode to the second driving mode.
In this embodiment, fig. 4 is a diagram showing a connection relationship of modules in a vehicle running mode switching system according to an embodiment of the present application, and fig. 5 is a diagram showing signals transmitted from the modules in the vehicle running mode switching system according to the embodiment of the present application. Referring to fig. 4 and 5, the transfer case control unit receives a four-wheel speed signal in the vehicle body stabilizing electronic stabilizing system, receives a longitudinal acceleration signal and a yaw acceleration signal provided by the airbag module, receives an expert mode signal of the HUT, interacts with the instrument, and outputs corresponding prompts. The second data acquisition module 302 in this application corresponds to the body stabilizing electronic stability system and the airbag module, and the control module 303 in this application corresponds to the transfer case control unit.
The embodiment of the invention also provides a vehicle, which specifically comprises: the vehicle running mode switching system is used for executing the steps in the vehicle running mode switching method.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A vehicle travel mode switching method, characterized by comprising:
under the condition that a vehicle is currently in a first driving mode, acquiring a first driving parameter value of the vehicle;
when the first running parameter value exceeds a preset threshold value, acquiring a running state parameter value of the vehicle;
and when the operating state parameter value is in a first operating state parameter value range, controlling the vehicle to be switched from a first driving mode to a second driving mode corresponding to the first operating state parameter value range, wherein the vehicle is operated more safely in the second driving mode than in the first driving mode within the first operating state parameter value range.
2. The method of claim 1, wherein after controlling the vehicle to switch from a first drive mode to a second drive mode corresponding to the first operating state parameter value range, the method further comprises:
and when the acquired running state parameter value of the vehicle is in a second running state parameter value range, controlling the vehicle to be switched from a second driving mode to a first driving mode corresponding to the second running state parameter value range, wherein the vehicle runs more safely in the first driving mode than in the second driving mode within the second running state parameter value range.
3. The method according to claim 1, characterized in that before acquiring the first driving parameter value of the vehicle in case the vehicle is currently in the first driving mode, the method further comprises:
detecting the starting operation of a user on an expert mode key of the vehicle, wherein the expert mode key is used for controlling the starting or stopping of a vehicle running mode switching method;
the method comprises the steps of starting detection on whether the vehicle is currently in a first driving mode or not under the condition that starting operation of a user on an expert mode key of the vehicle is not detected.
4. The method of claim 1, wherein the first drive mode comprises a high-speed four-wheel drive mode and the second drive mode comprises a smart four-wheel drive mode.
5. The method of claim 4, wherein the operating condition parameter values comprise: yaw angular acceleration of the vehicle, a difference in wheel speed between front and rear wheels of the vehicle, and a vehicle speed of the vehicle;
the first operating condition parameter value range includes: longitudinal acceleration of the vehicle < 3m/s 2 The yaw angular acceleration of the vehicle is less than 2m/s 2 The wheel speed difference of front and rear wheels of the vehicle is less than 3.5 percent, and the vehicle speed of the vehicle is more than or equal to 90 km/h;
the second operating condition parameter range includes: longitudinal acceleration of vehicle less than 3m/s 2 The yaw angular acceleration of the vehicle is less than 2m/s 2 The wheel speed difference of the front wheel and the rear wheel of the vehicle is less than 3.5 percent, and the vehicle speed of the vehicle is less than or equal to 60 km/h.
6. The method of claim 1, further comprising:
when the first running parameter value exceeds a preset threshold value, outputting corresponding first warning information;
when the operating state parameter value is in a first operating state parameter value range, outputting corresponding first prompt information;
and after the vehicle is switched from the first driving mode to the second driving mode, when the acquired running state parameter value of the vehicle is in the second running state parameter value range, outputting corresponding second prompt information.
7. A vehicle travel mode switching system, characterized by comprising:
the system comprises a first data acquisition module, a second data acquisition module and a control module, wherein the first data acquisition module is used for acquiring a first driving parameter value of a vehicle under the condition that the vehicle is currently in a first driving mode;
the second data acquisition module is used for acquiring the running state parameter value of the vehicle when the first running parameter value exceeds a preset threshold value;
the control module is used for controlling the vehicle to be switched from a first driving mode to a second driving mode corresponding to a first operating state parameter value range when the operating state parameter value is in the first operating state parameter value range, wherein the vehicle is safer to operate in the second driving mode than in the first driving mode within the first operating state parameter value range.
8. A vehicle, characterized in that the vehicle comprises: the system according to claim 7 is configured to perform the steps in the vehicle travel mode switching method according to any one of claims 1 to 6.
CN202111295636.XA 2021-11-03 2021-11-03 Vehicle driving mode switching method and system and vehicle Pending CN115027478A (en)

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WO2023078322A1 (en) * 2021-11-03 2023-05-11 长城汽车股份有限公司 Vehicle travel mode switching method, system, vehicle, computer program, and computer-readable medium

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CN108313061B (en) * 2018-03-29 2019-12-27 北京新能源汽车股份有限公司 Vehicle control method and device and automobile
CN115027478A (en) * 2021-11-03 2022-09-09 长城汽车股份有限公司 Vehicle driving mode switching method and system and vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023078322A1 (en) * 2021-11-03 2023-05-11 长城汽车股份有限公司 Vehicle travel mode switching method, system, vehicle, computer program, and computer-readable medium

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