Tooth hitting prevention method and system for driving mode switching, medium and vehicle

Abstract

The embodiment of the invention provides a tooth hitting prevention method and system for driving mode switching, a medium and a vehicle. The method comprises the steps that according to the neutral position locking state of the vehicle and the setting state of a four-wheel-drive gear shifting action signal, the vehicle is controlled to conduct low-speed four-wheel-drive mode switching, and a switching result is monitored; under the condition that the switching result is that switching fails, the gear shifting timeout prompt signal is set; based on the setting state of the gear shifting timeout prompt signal, the vehicle is controlled to return to a high-speed two-drive mode, and a return result is monitored; under the condition that the rollback result is successful rollback, the four-wheel-drive gear shifting action signal is quitted; and based on the setting state of the four-wheel-drive gear shifting action signal, whether neutral gear locking of the vehicle is relieved or not is determined. The invention aims to prevent the tooth breaking problem in the high-speed two-drive mode back-off process.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a method, system, medium and vehicle for preventing gear striking during drive mode switching. Background Art

[0002] The transfer case is an important transmission component for switching between high-speed two-wheel drive mode and low-speed four-wheel drive mode. The current four-wheel drive mode switching logic is that if the transfer case fails to switch from high-speed two-wheel drive mode to low-speed four-wheel drive mode, it will revert to high-speed two-wheel drive mode. After the switch fails, the vehicle will immediately release the neutral lock of the vehicle. If the driver changes gears during the process of reverting to high-speed two-wheel drive mode (that is, it has not reverted successfully and is still reverting), the reduction gear sleeve and the input shaft spline will hit the teeth, resulting in a tooth problem, which will damage the transfer case. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a method, system, medium and vehicle for preventing gear striking during drive mode switching that overcome the above-mentioned problems or at least partially solve the above-mentioned problems.

[0004] A first aspect of an embodiment of the present application provides a method for preventing gear striking during drive mode switching, the method comprising: According to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, the vehicle is controlled to switch to the low-speed four-wheel drive mode, and the switching result is monitored; When the switching result is a switching failure, a shift timeout prompt signal is set; Based on the setting state of the shift timeout prompt signal, controlling the vehicle to revert to the high-speed two-wheel drive mode, and monitoring the reversion result; When the rollback result is successful, the four-wheel drive shift action signal is set to exit; Based on the setting state of the four-wheel drive shift action signal, it is determined whether to release the neutral lock of the vehicle.

[0005] Optionally, the method further includes: If the rollback result is a rollback failure, a preset number of rollback attempts are made; When the preset number of retraction attempts all fail, the retraction action is stopped and the four-wheel drive shift action signal is deactivated.

[0006] Optionally, when the switching result is a switching failure, after setting the gear shift timeout prompt signal, the method further includes: Determine whether the vehicle is currently in emergency control; When the vehicle is not currently in an emergency control state, based on the setting state of the shift timeout prompt signal, control the vehicle to revert to the high-speed two-wheel drive mode, and monitor the reversion result; When the vehicle is currently in an emergency control state, based on the setting state of the shift timeout prompt signal, the vehicle is controlled to retract to the high-speed two-wheel drive mode, and the four-wheel drive shift action signal is de-set; Based on the setting state of the four-wheel drive shift action signal, the neutral lock of the vehicle is released.

[0007] Optionally, determining whether the vehicle is currently in an emergency control state, including: Monitor vehicle status and environmental status of the vehicle's environment; According to the vehicle state and the environment state, it is determined whether the vehicle is currently in an emergency control state.

[0008] Optionally, the vehicle status includes the vehicle's positioning information, motion information, and power system status; the environmental status of the vehicle's environment includes traffic information and weather information.

[0009] Optionally, determining whether the vehicle is currently in an emergency control state according to the vehicle state and the environmental state includes: When it is determined that the vehicle is in a remote area or on a highway based on the positioning information and movement information of the vehicle, it is determined that the vehicle is currently in an emergency control state; When the vehicle is determined to be in a congested section of a city according to the positioning information and movement information of the vehicle, it is determined that the vehicle is currently in an emergency control state; When it is determined according to the power system state of the vehicle that a serious fault occurs in the engine and / or a serious fault occurs in the transmission system of the vehicle, it is determined that the vehicle is currently in an emergency control state; When it is determined based on the power system status of the vehicle that the battery of the vehicle is low and / or the electrical system fails, determining that the vehicle is currently in an emergency control state; When it is determined based on traffic information of the vehicle's environment that the vehicle is in a severe traffic scenario, determining that the vehicle is currently in an emergency control state; When it is determined that the vehicle is in a severe weather scene according to weather information of the environment in which the vehicle is located, it is determined that the vehicle is currently in an emergency control state.

[0010] Optionally, determining whether the vehicle is currently in an emergency control state, including: Determining whether an emergency control request initiated by a user is received; According to the received emergency control request, it is determined that the vehicle is currently in an emergency control state.

[0011] A second aspect of an embodiment of the present application provides a gear-smashing prevention system for switching a driving mode, the system comprising: The first control and monitoring module is used to control the vehicle to switch to a low-speed four-wheel drive mode according to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, and monitor the switching result; A first setting control module, used for setting a shift timeout prompt signal when the switching result is a switching failure; A second control and monitoring module, configured to control the vehicle to revert to the high-speed two-wheel drive mode based on the setting state of the gear shift timeout prompt signal, and monitor the reversion result; The second setting control module is used for exiting the setting of the four-wheel drive shift action signal when the rollback result is successful; The locking control module is used to determine whether to release the neutral lock of the vehicle based on the setting state of the four-wheel drive shift action signal.

[0012] A third aspect of an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the anti-tooth striking method for driving mode switching as described in the first aspect of the present application are implemented.

[0013] A fourth aspect of an embodiment of the present application provides a vehicle, on which the anti-gear slugging system for drive mode switching described in the second aspect of the present application is provided, the shifting system of the hybrid vehicle executes the anti-gear slugging method for drive mode switching described in the first aspect of the present application, or the vehicle is provided with a computer-readable storage medium as described in the third aspect of the present application.

[0014] The present invention provides a method for preventing gear striking during drive mode switching, which has the following advantages: The embodiment of the present application provides a method for preventing the gear from being knocked when switching a driving mode. First, according to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, the vehicle is controlled to switch to the low-speed four-wheel drive mode, and the switching result is monitored; when the switching result is a switching failure, the shift timeout prompt signal is set; based on the setting state of the shift timeout prompt signal, the vehicle is controlled to retract to the high-speed two-wheel drive mode, and the retraction result is monitored; when the retraction result is a successful retraction, the four-wheel drive shift action signal is de-set; based on the setting state of the four-wheel drive shift action signal, it is determined whether to release the neutral lock of the vehicle. Therefore, the method for preventing the gear from being knocked when switching a driving mode provided by the present application will maintain the neutral lock state of the vehicle during the process of retracting to the high-speed two-wheel drive mode after the switching result of the vehicle switching to the low-speed four-wheel drive mode is a switching failure, and the neutral lock state of the vehicle will not be released until the vehicle successfully retracts to the high-speed two-wheel drive mode. This can effectively avoid the problem of gear knocking caused by the user switching gears when the vehicle fails to switch to low-speed four-wheel drive mode and immediately releasing the neutral lock state of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0016] Figure 1 This is a flow chart of a method for preventing gear striking during drive mode switching according to an embodiment of the present application; Figure 2 A schematic diagram of an anti-striking gear system for driving mode switching according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] refer to Figure 1 , Figure 1 This is a schematic diagram of a method for preventing gear striking during drive mode switching according to an embodiment of the present application. Figure 1 As shown, the present application provides a method for preventing gear striking during drive mode switching, comprising: Step S1: According to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, the vehicle is controlled to switch to the low-speed four-wheel drive mode, and the switching result is monitored.

[0019] In this embodiment, the driver issues a command to switch to the low-speed four-wheel drive mode through the vehicle's control panel or shift lever. Based on the received command, it is determined whether the vehicle is in a neutral state. If it is in a neutral state, the neutral state is locked and the four-wheel drive shift action signal is set. When it is determined that the vehicle is locked in the neutral state and the four-wheel drive shift action signal has been set, the vehicle is controlled to switch to the low-speed four-wheel drive mode, and the switching result to the low-speed four-wheel drive mode is monitored in real time.

[0020] Step S2: When the switching result is a switching failure, the gear shift timeout prompt signal is set.

[0021] In this embodiment, if the switching result obtained by monitoring is a successful switching, the vehicle will enter the low-speed four-wheel drive mode, and the monitoring is terminated at this time. However, if the switching result obtained by monitoring is a failed switching, the shift timeout prompt signal (Stu in low signal) is set, and the setting of the shift timeout prompt signal is used to inform the vehicle's four-wheel drive system that the vehicle has failed to switch to the low-speed four-wheel drive mode. At the same time, based on the setting of the shift timeout prompt signal, a corresponding warning message is synchronously sent to the vehicle's display screen to warn the driver.

[0022] In this embodiment, when the vehicle attempts to switch to the low-speed four-wheel drive mode for a preset number of times without success, the switching result is determined to be a switching failure. An optional implementation method may also be: when each attempt to switch to the low-speed four-wheel drive mode is unsuccessful, a corresponding prompt message is sent to the display screen, and the user is determined through the prompt message whether it is necessary to try to switch to the low-speed four-wheel drive mode again. If the user chooses to try again, the attempt to switch to the low-speed four-wheel drive mode continues. If the user chooses not to try again, the switching result is determined to be a switching failure, and the execution of subsequent operations continues. In this optional implementation method, the number of consecutive attempts to switch to the low-speed four-wheel drive mode by the user does not exceed the preset number. When the number of consecutive attempts to switch to the low-speed four-wheel drive mode reaches the preset number and still fails, the switching result will be determined to be a switching failure, and the execution of subsequent operations will continue.

[0023] Step S3: Based on the setting state of the gear shift timeout prompt signal, control the vehicle to revert to the high-speed two-wheel drive mode, and monitor the reversion result.

[0024] In this embodiment, when the gear shift timeout prompt signal is set, the four-wheel drive system controls the vehicle to revert to the high-speed two-wheel drive mode, and monitors the reversion result to the high-speed two-wheel drive mode in real time.

[0025] Step S4: When the rollback result is successful, the four-wheel drive shift action signal is exited and set.

[0026] In this embodiment, if the rollback result obtained by monitoring is that the rollback is successful, an exit setting operation is performed on the four-wheel drive shift action signal (Mode changein pro signal) immediately after the rollback is successful.

[0027] Step S5: determining whether to release the neutral lock of the vehicle based on the setting state of the four-wheel drive shift action signal.

[0028] In this embodiment, the de-positioning of the four-wheel drive shift action signal in step S4 will be performed synchronously with the de-locking of the neutral state. That is, when the four-wheel drive shift action signal is de-positioned, the neutral lock state of the vehicle will be released, and the user can freely switch to other gears (such as forward gear or reverse gear) and prepare for normal driving operation.

[0029] The present application provides a method for preventing the gear from being knocked when switching a driving mode. First, according to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, the vehicle is controlled to switch to the low-speed four-wheel drive mode, and the switching result is monitored; when the switching result is a switching failure, the shift timeout prompt signal is set; based on the setting state of the shift timeout prompt signal, the vehicle is controlled to retract to the high-speed two-wheel drive mode, and the retraction result is monitored; when the retraction result is a successful retraction, the four-wheel drive shift action signal is de-set; based on the setting state of the four-wheel drive shift action signal, it is determined whether to release the neutral lock of the vehicle. Therefore, the present application provides a method for preventing the gear from being knocked when switching a driving mode. After the switching result of the vehicle switching to the low-speed four-wheel drive mode is a switching failure, the neutral lock state of the vehicle is maintained during the process of retracting to the high-speed two-wheel drive mode, and the neutral lock state of the vehicle is not released until the vehicle successfully retracts to the high-speed two-wheel drive mode. This can effectively avoid the problem of gear-snapping caused by the user switching gears when the vehicle fails to switch to low-speed four-wheel drive mode and immediately unlocks the neutral gear lock state. At the same time, this method can also provide the driver with clear fault prompts and recovery instructions, reducing potential risks caused by improper operation or system failure.

[0030] In combination with the above embodiments, in one implementation, the embodiment of the present application further provides a method for preventing gear slapping during drive mode switching. In the method for preventing gear slapping during drive mode switching, the method further includes: when the rollback result is a rollback failure, performing a preset number of rollback attempts; when the preset number of rollback attempts all fail, stopping the rollback action and de-setting the four-wheel drive shift action signal.

[0031] In this embodiment, when the rollback result is a rollback failure, only the rollback attempt is repeated for a preset number of times. After one rollback is successful in the preset number of rollback attempts, the rollback action is terminated, and the exit setting operation is performed on the four-wheel drive shift action signal immediately after the rollback is successful. The exit setting of the four-wheel drive shift action signal will be synchronized with the exit locking of the neutral state. If it still fails after the preset number of rollback attempts, the rollback action is stopped to avoid further damage to the vehicle transmission system, and a corresponding alarm is given to the user. At the same time, after the rollback action is stopped, the exit setting operation is performed on the four-wheel drive shift action signal, and the exit setting of the four-wheel drive shift action signal will be synchronized with the exit locking of the neutral state. Therefore, if the rollback is not successful during the entire process of the vehicle rolling back to the high-speed two-wheel drive mode, the neutral state of the vehicle will be locked all the time, and the neutral lock of the vehicle will be released only after the rollback is successful, or the preset number of rollbacks fail and the rollback action is stopped. Thereby, the problem of tooth hitting caused by the driver shifting gears during the rollback process can be avoided. A certain time interval is set between each rollback attempt to allow the system to cool down or reset, thereby increasing the success rate of the next attempt.

[0032] In combination with the above embodiments, in one implementation, the embodiment of the present application also provides a method for preventing gear slapping during drive mode switching. In the method for preventing gear slapping during drive mode switching, after step S2, the method further includes: determining whether the vehicle is currently in an emergency control state; if the vehicle is not currently in an emergency control state, executing step S3; if the vehicle is currently in an emergency control state, based on the setting state of the shift timeout prompt signal, controlling the vehicle to retract to a high-speed two-wheel drive mode, and de-setting the four-wheel drive shift action signal; based on the setting state of the four-wheel drive shift action signal, releasing the neutral lock of the vehicle.

[0033] In this embodiment, in an actual driving scenario, when the driver needs to switch the vehicle from a high-speed two-wheel drive mode to a low-speed four-wheel drive mode to enhance the traction and passability of the vehicle, if the switching result is a switching failure due to some reasons during the switching process, the gear may be hit, which will not only damage the vehicle's transmission system, but also affect driving safety. In order to avoid this situation, the above-mentioned embodiment of the present application proposes a method for preventing gear from being hit during the drive mode switching, which, when the switching result is a switching failure, falls back to the high-speed two-wheel drive mode, and maintains the neutral lock state of the vehicle throughout the entire fallback process. The neutral lock of the vehicle will only be released after the fallback is successful, or after a preset number of fallbacks have failed and the fallback action has stopped. This can effectively avoid the problem of gear hitting when the driver switches gears during the fallback process (because the neutral is always locked, it is impossible to shift gears during the fallback process, so there will be no more gear hitting). However, the present application has found that such a control method also has certain safety risks. For example, in certain emergency situations (such as when the vehicle cannot move due to a malfunction, but its stopping in place will affect the driving of other vehicles or, more seriously, will create safety risks to the driving of other vehicles), when the driver needs to quickly take other control measures for the vehicle, because the vehicle remains in a neutral lock state for a long time (i.e., the neutral lock of the vehicle will be released only after waiting for the success of the rollback or after a preset number of rollbacks have failed and the rollback action has stopped, and the vehicle will be kept locked during this period), the driver cannot take the desired control measures on the vehicle in time, thereby increasing the safety risk. Therefore, in order to avoid the occurrence of such safety risks, the present application provides another implementation method: after the shift timeout prompt signal is set to inform the vehicle's four-wheel drive system that the vehicle has failed to switch to the low-speed four-wheel drive mode, it is further determined whether the vehicle is in an emergency control state, that is, whether the vehicle is in a scenario where the user needs to take other control measures on the vehicle in time (such as a scenario where the vehicle needs to be moved to a safe area in time, etc.).

[0034] If in an emergency control state, after the shift timeout prompt signal is set, the four-wheel drive shift action signal will be immediately de-positioned, and the de-positioning of the four-wheel drive shift action signal will be synchronized with the de-locking of the neutral state. That is, when the four-wheel drive shift action signal is de-positioned, the neutral lock state of the vehicle will be released, and the user can freely switch to other gears (such as forward gear or reverse gear) and prepare for normal driving operations. In an emergency, through this implementation, the driver can select the desired gear more quickly through the shift lever or electronic shift system to deal with risk scenarios.

[0035] If it is in a non-emergency control state, the above steps S3 to S5 are executed, that is, the neutral lock state of the vehicle is maintained throughout the entire reversing process, and the neutral lock of the vehicle will be released only after the reversal is successful, or after a preset number of reversal failures and the reversing action stops.

[0036] Specifically: when the switching result is a switching failure, the gear shift timeout prompt signal is set, and based on the setting of the gear shift timeout prompt signal, a corresponding warning message is synchronously sent to the vehicle's display screen to warn the driver and determine whether the vehicle is in an emergency control state that requires the user to control the vehicle in time.

[0037] In the case where it is determined that the vehicle is in a non-emergency control state, based on the setting of the shift timeout prompt signal, the four-wheel drive system controls the vehicle to retract to the high-speed two-wheel drive mode, and monitors the retraction result of the retraction to the high-speed two-wheel drive mode in real time. If the retraction result obtained by monitoring is a successful retraction, the exit setting operation is performed on the four-wheel drive shift action signal immediately after the retraction is successful, and the exit setting of the four-wheel drive shift action signal will be synchronized with the exit locking of the neutral state. That is, when the four-wheel drive shift action signal is exited, the neutral lock state of the vehicle will be released, and the user can freely switch to other gears (such as forward gear or reverse gear) and prepare for normal driving operations. In the case where the retraction result is a failed retraction, only the preset number of retraction attempts are repeated. After one retraction is successful in the preset number of retraction attempts, the retraction action is terminated, and the exit setting operation is performed on the four-wheel drive shift action signal immediately after the retraction is successful, and the exit setting of the four-wheel drive shift action signal will be synchronized with the exit locking of the neutral state. If the reversing action fails after a preset number of attempts, the reversing action will be stopped to avoid further damage to the vehicle's transmission system, and a corresponding warning will be given to the user. At the same time, after the reversing action is stopped, the four-wheel drive shift action signal will be exited and set, and the exit setting of the four-wheel drive shift action signal will be synchronized with the exit lock of the neutral state.

[0038] When it is determined that the vehicle is in an emergency control state, based on the setting of the shift timeout prompt signal, the four-wheel drive system controls the vehicle to retract to the high-speed two-wheel drive mode, and at the same time performs an exit setting operation on the four-wheel drive shift action signal, and the exit setting of the four-wheel drive shift action signal will be synchronized with the exit lock of the neutral state. That is, when the four-wheel drive shift action signal is exited, the neutral lock state of the vehicle will be released, and the user can freely switch to other gears (such as forward gear or reverse gear) and prepare for normal driving operations. Therefore, when the vehicle is in an emergency control state, as long as the switching result of switching to the low-speed four-wheel drive mode is a switching failure, the neutral lock of the vehicle will be released while retracting to the high-speed two-wheel drive mode, so that the user can control the vehicle in time. Although this may cause the occurrence of gear problems, it can avoid more serious safety risks.

[0039] In combination with the above embodiments, in one implementation, the embodiment of the present application further provides a method for preventing gear slamming during drive mode switching. In the method for preventing gear slamming during drive mode switching, determining whether the vehicle is currently in an emergency control state includes: monitoring the vehicle state and the environmental state of the vehicle's environment; determining whether the vehicle is currently in an emergency control state based on the vehicle state and the environmental state; the vehicle state includes the vehicle's positioning information, motion information, and power system state; the environmental state of the vehicle's environment includes traffic information and weather information.

[0040] In this embodiment, an optional implementation method of the present application for determining whether the vehicle is currently in an emergency control state is: based on the vehicle's own state and the environment in which it is located, determine whether the vehicle is in an emergency control state. Specifically: when starting to switch to the low-speed four-wheel drive mode, the monitoring of the vehicle state and the environmental state of the vehicle's environment is started, so as to more quickly respond to the emergency control state determination when falling back to the high-speed two-wheel drive mode after the subsequent possible switching failure. Then, when the switching result is a switching failure and the shift timeout prompt signal is set, the vehicle state and environmental state that have been monitored at the time of switching are immediately analyzed, and it is determined whether the vehicle is in an emergency control state based on the analysis of the two states. Among them, the vehicle state includes at least: the vehicle's positioning information, motion information, and power system state; the environmental state of the vehicle's environment includes at least: traffic information and weather information.

[0041] In combination with the above embodiments, in one implementation, the embodiment of the present application further provides a method for preventing gear slapping during drive mode switching. In the method for preventing gear slapping during drive mode switching, it is determined whether the vehicle is currently in an emergency control state according to the vehicle state and the environmental state, including: when it is determined that the vehicle is in a remote area or a highway according to the vehicle's positioning information and motion information, it is determined that the vehicle is currently in an emergency control state; when it is determined that the vehicle is in a congested section of a city according to the vehicle's positioning information and motion information, it is determined that the vehicle is currently in an emergency control state; when it is determined that the vehicle's engine has a serious fault and / or the transmission system has a serious fault according to the vehicle's power system state, it is determined that the vehicle is currently in an emergency control state; when it is determined that the vehicle's battery is low and / or the electrical system has a fault according to the vehicle's power system state, it is determined that the vehicle is currently in an emergency control state; when it is determined that the vehicle is in a severe traffic scene according to the traffic information of the vehicle's environment, it is determined that the vehicle is currently in an emergency control state; when it is determined that the vehicle is in a severe weather scene according to the weather information of the vehicle's environment, it is determined that the vehicle is currently in an emergency control state.

[0042] In this embodiment, an optional implementation method for determining whether the vehicle is currently in an emergency control state based on the vehicle state and the environment state in which the vehicle is located is to obtain the vehicle's GPS positioning data and motion information collected by vehicle-mounted sensors (such as wheel speed sensors, acceleration sensors, etc.). When the positioning information shows that the vehicle is located in a remote area, or the vehicle is determined to be located on a highway based on the positioning information and motion information, the system determines that the vehicle may be facing an emergency, such as the need to quickly cross complex terrain or to avoid danger in an emergency, and at this time determines that the vehicle is in an emergency control state.

[0043] When the vehicle's positioning information shows that it is located in the city center or a busy traffic area, and the movement information reflects that the vehicle is frequently stopping and starting, indicating that the vehicle is in a congested road condition, it is determined that the vehicle is in an emergency control state and it is necessary to promptly control the vehicle to pull over to avoid affecting the driving of other vehicles.

[0044] Monitor the fault codes of the engine control unit (ECU Engine Control Unit) and the transmission control unit (TCU Transmission Control Unit), and determine that the vehicle is currently in an emergency control state when a serious engine fault (such as cylinder explosion, serious oil leakage) or a serious transmission system fault (such as gearbox gear damage, drive shaft breakage) is determined based on the fault codes.

[0045] Monitor the status of the battery management system (BMS Battery Management System) and the electrical system, and determine that the vehicle is currently in an emergency control state if the battery power is lower than the critical value or the electrical system (such as the motor, controller) fails.

[0046] Based on the Internet of Vehicles technology, the vehicle receives surrounding traffic information and / or obtains surrounding traffic information through its own sensor monitoring, analyzes the obtained traffic information, and determines traffic conditions, such as traffic accidents, road closures, severe congestion, etc. When the vehicle is in such a severe traffic scenario, it is determined that the vehicle is currently in an emergency control state.

[0047] The vehicle's on-board system is integrated with a meteorological data interface to obtain local weather information in real time, and / or obtains weather information of the current location through its own sensor monitoring. Based on the weather information obtained, it is determined whether the vehicle is currently in a severe weather scene, such as heavy rain, blizzard, extreme high or low temperatures, etc. These scenes may seriously affect vehicle performance, such as reduced tire grip, reduced visibility, etc. At this time, when it is determined that the vehicle is currently in such a severe weather scene, it is determined that the vehicle is currently in an emergency control state.

[0048] Through the above-mentioned specific implementation methods, the anti-gear knocking method for drive mode switching provided by the present application can comprehensively and flexibly determine whether the vehicle is in an emergency control state according to the current actual state and environmental conditions of the vehicle, thereby timely adjusting the locking strategy of the vehicle's neutral state after the four-wheel drive mode switching fails, while effectively preventing the occurrence of gear knocking, it can ensure the safe driving of the vehicle in various emergency situations.

[0049] In combination with the above embodiments, in one implementation, the embodiment of the present application further provides a method for preventing gear slapping during drive mode switching. In the method for preventing gear slapping during drive mode switching, determining whether the vehicle is currently in an emergency control state includes: determining whether an emergency control request initiated by a user is received; and determining that the vehicle is currently in an emergency control state based on the received emergency control request.

[0050] In this embodiment, the above implementation method of determining whether the vehicle is currently in an emergency control state based on the vehicle state and the environmental state of the vehicle is based on the state information obtained through monitoring, and the vehicle control system automatically determines whether it is currently in an emergency control state to select a locking strategy corresponding to the neutral state of the vehicle. However, this automatic control method cannot take all emergency scenarios into account. Therefore, in order to ensure that any emergency scenario can determine that the vehicle is in an emergency control state in the emergency scenario, the present application also provides a control button for the driver to select whether the vehicle is in an emergency control state in the current scenario. The control button can be a physical button switch and / or a HUT (Head-Up Display) soft switch.

[0051] Specifically: inside the vehicle, preferably at a position within the reach of the driver (such as near the steering wheel, central control panel, etc.), a dedicated control button for selecting whether the vehicle is in an emergency control state in the current scenario is set. When the vehicle is currently in an emergency scenario but is not identified by the vehicle's monitoring control logic and determined to be in an emergency control state, the user presses the control button to send a request that the vehicle is currently in an emergency control state to the vehicle's control system. Based on the received request, the vehicle's control system determines that the vehicle is currently in an emergency control state, and then selects the corresponding vehicle neutral state locking strategy to lock the neutral state after the low-speed four-wheel drive mode switch fails.

[0052] Based on the same inventive concept, an embodiment of the present application provides a gear-smashing prevention system for driving mode switching, such as Figure 2 As shown, the system 200 includes: The first control and monitoring module 201 is used to control the vehicle to switch to a low-speed four-wheel drive mode according to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, and monitor the switching result; A first setting control module 202, used for setting a shift timeout prompt signal when the switching result is a switching failure; The second control and monitoring module 203 is used to control the vehicle to revert to the high-speed two-wheel drive mode based on the setting state of the gear shift timeout prompt signal, and monitor the reversion result; The second setting control module 204 is used to exit the setting of the four-wheel drive shift action signal when the rollback result is successful; The locking control module 205 is used to determine whether to release the neutral lock of the vehicle based on the setting state of the four-wheel drive shift action signal.

[0053] Optionally, the system 200 further includes: A rollback control module, used to make a preset number of rollback attempts when the rollback result is a rollback failure; The second setting control module 204 is used to stop the retraction action and exit the setting of the four-wheel drive shift action signal when a preset number of retraction attempts fail.

[0054] Optionally, the system 200 further includes: An emergency control state determination module, used to determine whether the vehicle is currently in an emergency control state; The second control and monitoring module 203 is used to control the vehicle to revert to the high-speed two-wheel drive mode based on the setting state of the shift timeout prompt signal when the vehicle is not currently in an emergency control state, and monitor the reversion result; and, when the vehicle is currently in an emergency control state, based on the setting state of the shift timeout prompt signal, control the vehicle to revert to the high-speed two-wheel drive mode and de-set the four-wheel drive shift action signal; The locking control module 205 is used to release the neutral lock of the vehicle based on the setting state of the four-wheel drive shift action signal.

[0055] Optionally, an emergency control state determination module includes: A monitoring module, used to monitor the vehicle status and the environmental status of the environment in which the vehicle is located; The emergency control state determination submodule is used to determine whether the vehicle is currently in an emergency control state based on the vehicle state and the environmental state, wherein the vehicle state includes the vehicle's positioning information, motion information, and power system state; the environmental state of the vehicle's environment includes traffic information and weather information.

[0056] Optionally, the emergency control state determination submodule includes: A first emergency control state determination submodule, for determining that the vehicle is currently in an emergency control state when the vehicle is in a remote area or a highway according to the positioning information and movement information of the vehicle; A second emergency control state determination submodule, for determining that the vehicle is currently in an emergency control state when the vehicle is in a congested section of a city according to the positioning information and movement information of the vehicle; A third emergency control state determination submodule, configured to determine that the vehicle is currently in an emergency control state when it is determined that a serious fault occurs in the engine and / or a serious fault occurs in the transmission system of the vehicle according to the power system state of the vehicle; a fourth emergency control state determination submodule, configured to determine that the vehicle is currently in an emergency control state when it is determined that the battery power of the vehicle is insufficient and / or the electrical system has a fault according to the power system state of the vehicle; A fifth emergency control state determination submodule, for determining that the vehicle is currently in an emergency control state when the vehicle is in a severe traffic scene according to traffic information of the vehicle's environment; The sixth emergency control state determination submodule is used to determine that the vehicle is currently in an emergency control state when it is determined that the vehicle is in a severe weather scene according to weather information of the vehicle's environment.

[0057] Optionally, an emergency control state determination module includes: An emergency control request determination module, used to determine whether an emergency control request initiated by a user is received; The emergency control state determination submodule is used to determine whether the vehicle is currently in an emergency control state according to the received emergency control request.

[0058] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the anti-tooth hitting method for driving mode switching as described in the first aspect of the present application are implemented.

[0059] Based on the same inventive concept, an embodiment of the present application provides a vehicle, on which the anti-gear slugging system for drive mode switching described in the second aspect of the present application is provided, the shifting system of the hybrid vehicle executes the anti-gear slugging method for drive mode switching described in the first aspect of the present application, or the vehicle is provided with a computer-readable storage medium as described in the third aspect of the present application.

[0060] As for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0061] It should be noted that, for the method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the described order of actions, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0062] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0063] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the embodiments of the present application may adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the embodiments of the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0064] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0065] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0066] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0067] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0068] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0069] The above is a detailed introduction to the anti-tooth striking method, system, medium and vehicle for drive mode switching provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for preventing gear striking during driving mode switching, characterized in that: The method comprises: According to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, the vehicle is controlled to switch to the low-speed four-wheel drive mode, and the switching result is monitored; When the switching result is a switching failure, a shift timeout prompt signal is set; Based on the setting state of the shift timeout prompt signal, controlling the vehicle to revert to the high-speed two-wheel drive mode, and monitoring the reversion result; When the rollback result is successful, the four-wheel drive shift action signal is set to exit; Based on the setting state of the four-wheel drive shift action signal, it is determined whether to release the neutral lock of the vehicle.

2. The method for preventing gear striking during driving mode switching according to claim 1, characterized in that: The method further comprises: If the rollback result is a rollback failure, a preset number of rollback attempts are made; When the preset number of retraction attempts all fail, the retraction action is stopped and the four-wheel drive shift action signal is deactivated.

3. The method for preventing gear striking during driving mode switching according to claim 1, characterized in that: When the switching result is a switching failure, after setting the gear shift timeout prompt signal, the method further includes: Determine whether the vehicle is currently in emergency control; When the vehicle is not currently in an emergency control state, based on the setting state of the shift timeout prompt signal, control the vehicle to revert to the high-speed two-wheel drive mode, and monitor the reversion result; When the vehicle is currently in an emergency control state, based on the setting state of the shift timeout prompt signal, the vehicle is controlled to retract to the high-speed two-wheel drive mode, and the four-wheel drive shift action signal is de-set; Based on the setting state of the four-wheel drive shift action signal, the neutral lock of the vehicle is released.

4. The method for preventing gear striking during driving mode switching according to claim 3, characterized in that: Determine whether the vehicle is currently in emergency control, including: Monitor vehicle status and environmental status of the vehicle's environment; According to the vehicle state and the environment state, it is determined whether the vehicle is currently in an emergency control state.

5. The method for preventing gear striking during driving mode switching according to claim 4, characterized in that: The vehicle status includes the vehicle's positioning information, motion information, and power system status; the environmental status of the vehicle's environment includes traffic information and weather information.

6. The method for preventing gear striking during driving mode switching according to claim 5, characterized in that: Determining whether the vehicle is currently in an emergency control state according to the vehicle state and the environment state includes: When it is determined that the vehicle is in a remote area or on a highway based on the positioning information and movement information of the vehicle, it is determined that the vehicle is currently in an emergency control state; When the vehicle is determined to be in a congested section of a city according to the positioning information and movement information of the vehicle, it is determined that the vehicle is currently in an emergency control state; When it is determined according to the power system state of the vehicle that a serious fault occurs in the engine and / or a serious fault occurs in the transmission system of the vehicle, it is determined that the vehicle is currently in an emergency control state; When it is determined based on the power system status of the vehicle that the battery of the vehicle is low and / or the electrical system fails, determining that the vehicle is currently in an emergency control state; When it is determined based on traffic information of the vehicle's environment that the vehicle is in a severe traffic scenario, determining that the vehicle is currently in an emergency control state; When it is determined that the vehicle is in a severe weather scene according to weather information of the environment in which the vehicle is located, it is determined that the vehicle is currently in an emergency control state.

7. The method for preventing gear striking during driving mode switching according to claim 3, characterized in that: Determine whether the vehicle is currently in emergency control, including: Determining whether an emergency control request initiated by a user is received; According to the received emergency control request, it is determined that the vehicle is currently in an emergency control state.

8. A gear-smashing prevention system for driving mode switching, characterized in that: The system comprises: The first control and monitoring module is used to control the vehicle to switch to a low-speed four-wheel drive mode according to the neutral lock state of the vehicle and the setting state of the four-wheel drive shift action signal, and monitor the switching result; A first setting control module, used for setting a shift timeout prompt signal when the switching result is a switching failure; A second control and monitoring module, configured to control the vehicle to revert to the high-speed two-wheel drive mode based on the setting state of the gear shift timeout prompt signal, and monitor the reversion result; The second setting control module is used for exiting the setting of the four-wheel drive shift action signal when the rollback result is successful; The locking control module is used to determine whether to release the neutral lock of the vehicle based on the setting state of the four-wheel drive shift action signal.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the anti-tooth striking method for driving mode switching according to any one of claims 1 to 7 are implemented.

10. A vehicle, characterized in that: The vehicle is provided with the anti-gear slugging system for drive mode switching as described in claim 8, the shifting system of the hybrid vehicle executes the anti-gear slugging method for drive mode switching as described in any one of claims 1-7, or the vehicle is provided with the computer-readable storage medium as described in claim 9.

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