Method and system for preventing gear clashing during drive mode switching, medium, and vehicle

Abstract

A method for preventing gear clashing during drive mode switching, comprising: on the basis of a neutral gear locking state of a vehicle and a set state of a four-wheel-drive gear shift action signal, controlling the vehicle to switch to a low-speed four-wheel-drive mode, and monitoring a switching result; when the switching result indicates a switching failure, setting a gear shift timeout prompt signal; on the basis of the set state of the gear shift timeout prompt signal, controlling the vehicle to roll back to a high-speed two-wheel-drive mode, and monitoring a rollback result; when the rollback result indicates a successful rollback, de-asserting the four-wheel-drive gear shift action signal; and on the basis of the set state of the four-wheel-drive gear shift action signal, determining whether to release a neutral gear lock of the vehicle. The method can prevent the occurrence of gear clashing during rollback to the high-speed two-wheel-drive mode. In addition, the present invention further relates to a system for preventing gear clashing during drive mode switching, a computer-readable storage medium, and a vehicle.

Description

A method, system, medium, and vehicle for preventing tooth knocking during drive mode switching.

[0001] This disclosure claims priority to Chinese Patent Application No. 202411973763.4, filed with the Chinese Patent Office on December 30, 2024, entitled "A method, system, medium and vehicle for preventing tooth damage during drive mode switching", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of automotive technology, specifically to a method, system, medium, and vehicle for preventing gear damage during drive mode switching. Background Technology

[0003] The transfer case is a crucial transmission component for switching between high-speed two-wheel drive and low-speed four-wheel drive modes. The current four-wheel drive mode switching logic works as follows: if the transfer case fails to switch from high-speed two-wheel drive to low-speed four-wheel drive, it will revert to high-speed two-wheel drive mode. After the failed switch, the vehicle will immediately release the neutral lock. However, if the driver shifts gears during the reversion process (i.e., before the reversion is complete), the reduction gear sleeve and input shaft splines will experience gear wear, potentially damaging the transfer case. Summary of the Invention

[0004] In view of this, embodiments of the present disclosure provide a method, system, medium, and vehicle for preventing tooth-jamming during drive mode switching that overcomes or at least partially solves the above-mentioned problems.

[0005] The first aspect of this disclosure provides a method for preventing gear knocking during drive mode switching. The method includes: controlling the vehicle to switch to a low-speed four-wheel drive mode based on the vehicle's neutral lock state and the setting state of a four-wheel drive shift action signal, and monitoring the switching result; if the switching result is a switching failure, setting a shift timeout warning signal; based on the setting state of the shift timeout warning signal, controlling the vehicle to revert to a high-speed two-wheel drive mode, and monitoring the reverting result; if the reverting result is a successful revert, de-setting the four-wheel drive shift action signal; and based on the setting state of the four-wheel drive shift action signal, determining whether to release the vehicle's neutral lock.

[0006] Optionally, the method further includes: if the reversal result is a reversal failure, performing a preset number of reversal attempts; if all preset number of reversal attempts fail, stopping the reversal action and deactivating the four-wheel drive shift action signal.

[0007] Optionally, if the switching result is a switching failure, after setting the shift timeout warning signal, 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, based on the set state of the shift timeout warning signal, controlling the vehicle to revert to high-speed two-wheel drive mode and monitoring the reverting result; if the vehicle is currently in an emergency control state, based on the set state of the shift timeout warning signal, controlling the vehicle to revert to high-speed two-wheel drive mode and de-setting the four-wheel drive shift action signal; and based on the set state of the four-wheel drive shift action signal, releasing the neutral lock of the vehicle.

[0008] Optionally, determining whether the vehicle is currently in an emergency control state includes: monitoring the vehicle status and the environmental status of the environment in which the vehicle is located; and determining whether the vehicle is currently in an emergency control state based on the vehicle status and the environmental status.

[0009] Optionally, the vehicle status includes the vehicle's location information, motion information, and power system status; the environmental status of the vehicle's surroundings includes traffic information and weather information.

[0010] Optionally, determining whether the vehicle is currently in an emergency control state based on the vehicle status and the environmental status includes: determining that the vehicle is currently in an emergency control state when the vehicle's location and motion information indicate that it is in a remote area or on a highway; determining that the vehicle is currently in an emergency control state when the vehicle's location and motion information indicate that it is in a congested urban area; determining that the vehicle is currently in an emergency control state when the vehicle's powertrain system status indicates that the vehicle's engine has a serious malfunction and / or its transmission system has a serious malfunction; determining that the vehicle's powertrain system status indicates that the vehicle's battery is low and / or its electrical system has a malfunction; determining that the vehicle is currently in an emergency control state when the vehicle is in a severe traffic scenario based on traffic information of the vehicle's environment; and determining that the vehicle is in a severe weather scenario based on weather information of the vehicle's environment.

[0011] Optionally, determining whether the vehicle is currently in an emergency control state includes: determining whether an emergency control request initiated by a user has been received; and determining that the vehicle is currently in an emergency control state based on the received emergency control request.

[0012] A second aspect of this disclosure provides an anti-gear-striking system for drive mode switching. The system includes: a first control and monitoring module, configured to control the vehicle to switch to a low-speed four-wheel drive mode based on the vehicle's neutral lock state and the set state of the four-wheel drive shift action signal, and monitor the switching result; a first set control module, configured to set a shift timeout warning signal if the switching result is a switching failure; a second control and monitoring module, configured to control the vehicle to revert to a high-speed two-wheel drive mode based on the set state of the shift timeout warning signal, and monitor the reverting result; a second set control module, configured to de-set the four-wheel drive shift action signal if the reverting result is a successful revert; and a lock control module, configured to determine whether to release the vehicle's neutral lock based on the set state of the four-wheel drive shift action signal.

[0013] A third aspect of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of a drive mode switching anti-tooth-jamming method as described in the first aspect of this disclosure.

[0014] A fourth aspect of this disclosure provides a vehicle equipped with an anti-gear-scratching system for drive mode switching as described in the second aspect of this disclosure, wherein the vehicle's shifting system executes the anti-gear-scratching method for drive mode switching as described in the first aspect of this disclosure, or the vehicle is equipped with a computer-readable storage medium as described in the third aspect of this disclosure.

[0015] This disclosure provides an anti-gear-jamming method for drive mode switching. First, based on the vehicle's neutral lock state and the setting state of the four-wheel drive shift signal, the vehicle is controlled to switch to a low-speed four-wheel drive mode, and the switching result is monitored. If the switching result is a failure, a shift timeout warning signal is set. Based on the setting state of the shift timeout warning signal, the vehicle is controlled to revert to a high-speed two-wheel drive mode, and the reversion result is monitored. If the reversion result is a success, the four-wheel drive shift signal is de-set. Based on the setting state of the four-wheel drive shift signal, it is determined whether to release the vehicle's neutral lock. Therefore, this anti-gear-jamming method for drive mode switching maintains the vehicle's neutral lock state during the reversion from low-speed four-wheel drive mode to high-speed two-wheel drive mode after the switching result is a failure, until the vehicle successfully reverts to high-speed two-wheel drive mode before releasing the neutral lock. This effectively avoids the problem of gear grinding that might occur when the vehicle fails to switch to low-speed four-wheel drive mode and immediately releases the neutral lock, and then the user switches gears during the subsequent reversal to high-speed two-wheel drive mode. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a flowchart illustrating a method for preventing tooth knocking during drive mode switching according to an embodiment of this disclosure;

[0018] Figure 2 is a schematic diagram of an anti-tooth-scraping system with drive mode switching according to an embodiment of the present disclosure. Embodiments of the present invention

[0019] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0020] Referring to Figure 1, Figure 1 is a schematic diagram illustrating a method for preventing tooth impact during drive mode switching according to an embodiment of this disclosure. As shown in Figure 1, the method for preventing tooth impact during drive mode switching provided by this disclosure includes the following steps.

[0021] Step S1: Based on the vehicle's neutral lock status and the four-wheel drive shift signal status, control the vehicle to switch to low-speed four-wheel drive mode and monitor the switching result.

[0022] In this embodiment, the driver issues a command to switch to low-speed four-wheel drive mode via the vehicle's control panel or gear shift lever. Based on the received command, it is determined whether the vehicle is in neutral. If it is in neutral, the neutral state is locked, and the four-wheel drive shift signal is set. Setting refers to the operation of switching specific control information from an inactive state to an active state and maintaining it thereafter. With the vehicle locked in neutral and the four-wheel drive shift signal set, the vehicle is controlled to switch to low-speed four-wheel drive mode, and the switching result is monitored in real time. In this disclosure, low-speed four-wheel drive mode refers to a drive mode where the transfer case is engaged in a low gear, amplifying the engine output torque through a built-in reduction gear set and simultaneously transmitting power to the front and rear axles. High-speed two-wheel drive mode refers to a drive mode where the transfer case is engaged in a high gear, and power is transmitted directly or through a high-ratio gear pair to a single axle.

[0023] Step S2: If the switching result is a switching failure, set the shift timeout warning signal.

[0024] In this embodiment, if the monitored switching result is successful, the vehicle will enter low-speed four-wheel drive mode, and the monitoring will end. However, if the monitored switching result is a switching failure, the shift timeout warning signal (Stu in low signal) will be set. Setting this shift timeout warning signal is used to inform the vehicle's four-wheel drive system that the vehicle failed to switch to low-speed four-wheel drive mode. At the same time, based on the setting of this shift timeout warning signal, corresponding alarm information will be sent to the vehicle's display screen to warn the driver.

[0025] In this embodiment, if the vehicle fails to switch to low-speed four-wheel drive mode after a preset number of attempts, the switching result is determined to be a switching failure. An optional implementation may also be as follows: each time the attempt to switch to low-speed four-wheel drive mode fails, a corresponding prompt message is sent to the display screen to ask the user whether they want to try switching to low-speed four-wheel drive mode again. If the user chooses to try again, the attempt to switch to 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 subsequent operations continue. In this optional implementation, the number of times the user can continuously attempt to switch to low-speed four-wheel drive mode does not exceed a preset number. If the number of continuous attempts to switch to low-speed four-wheel drive mode reaches the preset number and still fails, the switching result is determined to be a switching failure, and subsequent operations continue.

[0026] Step S3: Based on the setting state of the shift timeout warning signal, control the vehicle to revert to high-speed two-wheel drive mode and monitor the reverting result.

[0027] In this embodiment, when the shift timeout warning signal is set, the four-wheel drive system controls the vehicle to revert to high-speed two-wheel drive mode and monitors the reversion result in real time.

[0028] Step S4: If the reversal result is successful, set the four-wheel drive shift action signal to exit the set position.

[0029] In this embodiment, if the monitored rollback result is successful, the exit setting operation is immediately performed on the four-wheel drive shift action signal (Mode change in pro signal) after the rollback is successful.

[0030] Step S5: Based on the set state of the four-wheel drive shift action signal, determine whether to release the neutral lock of the vehicle.

[0031] In this embodiment, the exit setting of the four-wheel drive shift action signal in step S4 is 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 drive or reverse) and prepare for normal driving operations.

[0032] This disclosure provides a method for preventing gear knocking during drive mode switching. First, based on the vehicle's neutral lock state and the status of the four-wheel drive shift signal, the vehicle is controlled to switch to a low-speed four-wheel drive mode, and the switching result is monitored. If the switching fails, a shift timeout warning signal is set. Based on the status of the shift timeout warning signal, the vehicle is controlled to revert to a high-speed two-wheel drive mode, and the reversion result is monitored. If the reversion is successful, the four-wheel drive shift signal is de-set. Based on the status of the four-wheel drive shift signal, it is determined whether to release the vehicle's neutral lock. Therefore, this method maintains the vehicle's neutral lock state during the reversion from low-speed four-wheel drive mode to high-speed two-wheel drive mode after a failed switch, until the vehicle successfully reverts to high-speed two-wheel drive mode before releasing the neutral lock. This effectively avoids the gear grinding problem that could occur when the vehicle immediately releases the neutral lock after a failed low-speed four-wheel drive mode switch, and then shifts gears during the subsequent return to high-speed two-wheel drive mode. Furthermore, this method provides drivers with clear fault indications and recovery instructions, reducing potential risks caused by improper operation or system malfunctions.

[0033] In conjunction with the above embodiments, in one implementation, this disclosure also provides a method for preventing gear damage during drive mode switching. This method further includes: if the reversal result is a failure, performing a preset number of reversal attempts; if all preset number of reversal attempts fail, stopping the reversal action and deactivating the four-wheel drive shifting action signal.

[0034] In this embodiment, if the reversal fails, a preset number of reversal attempts are made. Once a successful reversal occurs within this preset number of attempts, the reversal action ends, and immediately after a successful reversal, the four-wheel drive shift signal is set to exit. This exit setting of the four-wheel drive shift signal is synchronized with the neutral state lock release. If the reversal attempt fails again after the preset number of attempts, the reversal action stops to avoid further damage to the vehicle's transmission system, and a corresponding warning is issued to the user. Simultaneously, after stopping the reversal action, the four-wheel drive shift signal is set to exit, synchronized with the neutral state lock release. Therefore, if the vehicle fails to reversal successfully throughout the entire reversal to high-speed two-wheel drive mode, the vehicle will remain locked in neutral. The neutral lock will only be released after a successful reversal, or after the preset number of failed reversals and the reversal action has stopped. This avoids gear grinding caused by the driver shifting gears during the reversal process. In this approach, a certain time interval is set between each rollback attempt to allow the system to cool down or reset, thereby improving the success rate of the next attempt.

[0035] In conjunction with the above embodiments, in one implementation, this disclosure also provides a method for preventing gear breakage during drive mode switching. In this method, 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 set state of the shift timeout warning signal, controlling the vehicle to revert to high-speed two-wheel drive mode and deactivating the four-wheel drive shift action signal; based on the set state of the four-wheel drive shift action signal, releasing the neutral lock on the vehicle.

[0036] In this embodiment, in actual driving scenarios, when a driver needs to switch the vehicle from high-speed two-wheel drive mode to low-speed four-wheel drive mode to enhance the vehicle's traction and passability, if the switch fails for some reason, gear grinding may occur. This can damage the vehicle's transmission system and affect driving safety. To avoid this situation, the above-described embodiments of this disclosure propose a method to prevent gear grinding during drive mode switching. In the event of a failed switch, the vehicle reverts to high-speed two-wheel drive mode and maintains a neutral lock throughout the reversal process. The neutral lock is only released after a successful reversal or after a preset number of failed reversals and the reversal action stops. This effectively prevents gear grinding during the reversal process (because neutral is always locked, shifting gears is not possible during reversal, thus preventing gear grinding). However, this disclosure also reveals certain safety risks associated with this control method. For example, in certain emergency situations (such as when a vehicle is unable to move due to a malfunction, but its stationary position may affect the driving of other vehicles or, more seriously, pose a safety risk to the driving of other vehicles), when the driver needs to quickly take other control measures for the vehicle, the vehicle remains in a neutral locked state for an extended period (i.e., the neutral lock is only released after a successful reverse or after a preset number of failed reverse attempts, during which time the vehicle remains locked). This prevents the driver from taking the desired control measures in a timely manner, thus increasing safety risks. Therefore, to avoid this safety risk, this disclosure provides another implementation method: after setting a shift timeout warning signal to inform the vehicle's four-wheel drive system that the vehicle has failed to switch to low-speed four-wheel drive mode, further determination is made as to whether the vehicle is in an emergency control state, that is, whether the vehicle is in a scenario requiring the user to take other control measures in a timely manner (such as a scenario requiring the vehicle to be moved to a safe area immediately).

[0037] In an emergency control situation, after the shift timeout warning signal is set, the four-wheel drive shift signal will immediately be deactivated. Simultaneously, this deactivation will occur at the same time as the neutral lock is disengaged. That is, as the four-wheel drive shift signal deactivates, the vehicle's neutral lock will be released, allowing the driver to freely shift to other gears (such as drive or reverse) and prepare for normal driving. In emergency situations, this implementation allows the driver to more quickly select the required gear using the gear lever or electronic shift system to handle dangerous scenarios.

[0038] If the situation is not under emergency control, then steps S3 to S5 above will be executed. That is, the vehicle will be kept in neutral lock throughout the entire reversal process. The neutral lock will only be released after the reversal is successful or after a preset number of reversals have failed and the reversal action has stopped.

[0039] Specifically: if the switching result is a switching failure, the shift timeout warning signal is set, and based on the setting of the shift timeout warning signal, the corresponding alarm information is 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 take immediate control of the vehicle.

[0040] If the vehicle is determined to be in a non-emergency control state, based on the setting of the shift timeout warning signal, the four-wheel drive system controls the vehicle to revert to high-speed two-wheel drive mode and monitors the reversion result in real time. If the monitored reversion result is successful, the four-wheel drive shift action signal is immediately set to exit after successful reversion. This exit setting of the four-wheel drive shift action signal will be synchronized with the neutral lock release. That is, when the four-wheel drive shift action signal is exited, the vehicle's neutral lock will be released, and the user can freely shift to other gears (such as drive or reverse) and prepare for normal driving operations. If the reversion result is unsuccessful, the reversion attempt is repeated only a preset number of times. After one successful reversion within this preset number of attempts, the reversion action ends, and the four-wheel drive shift action signal is immediately set to exit after a successful reversion. This exit setting of the four-wheel drive shift action signal will be synchronized with the neutral lock release. If the reversal attempt fails after a preset number of attempts, the reversal action will be stopped to avoid further damage to the vehicle's transmission system. A corresponding warning will be issued to the user. At the same time, after the reversal action stops, the four-wheel drive shift signal will be set to exit. The exit setting of the four-wheel drive shift signal will be performed synchronously with the exit lock of the neutral position.

[0041] When the vehicle is determined to be in an emergency control state, based on the setting of the shift timeout warning signal, the four-wheel drive system controls the vehicle to revert to high-speed two-wheel drive mode. Simultaneously, it performs a disengagement operation on the four-wheel drive shift signal. This disengagement of the four-wheel drive shift signal occurs synchronously with the disengagement of the neutral lock. That is, as the four-wheel drive shift signal disengages, the vehicle's neutral lock is released, allowing the user to freely shift to other gears (such as drive or reverse) and prepare for normal driving. Therefore, in an emergency control state, if the attempt to switch to low-speed four-wheel drive mode fails, the neutral lock will be released immediately upon reverting to high-speed two-wheel drive mode, allowing the user to regain control of the vehicle promptly. While this may cause gear grinding, it avoids more serious safety risks.

[0042] In conjunction with the above embodiments, in one implementation, this disclosure also provides a method for preventing gear damage during drive mode switching. In this method, determining whether the vehicle is currently in an emergency control state includes: monitoring the vehicle's status and the environmental status of the vehicle's surroundings; determining whether the vehicle is currently in an emergency control state based on the vehicle's status and the environmental status; the vehicle status includes the vehicle's location information, motion information, and powertrain status; the environmental status of the vehicle's surroundings includes traffic information and weather information.

[0043] In this embodiment, one optional implementation method for determining whether a vehicle is currently in an emergency control state is as follows: The determination is based on the vehicle's own state and its surrounding environment. Specifically, monitoring of the vehicle's state and the environmental state of the vehicle's surroundings begins simultaneously with the switch to low-speed four-wheel drive mode, to more quickly determine the emergency control state in case of a potential reversal to high-speed two-wheel drive mode after a possible switch failure. Then, if the switch fails and the shift timeout warning signal is set, the vehicle's state and environmental state monitored during the switch are immediately analyzed. Based on the analysis of these two states, the determination is made as to whether the vehicle is in an emergency control state. The vehicle state includes at least: vehicle location information, motion information, and powertrain status; the environmental state of the vehicle's surroundings includes at least: traffic information and weather information.

[0044] In conjunction with the above embodiments, in one implementation, this disclosure also provides a method for preventing gear damage during drive mode switching. In this method, determining whether the vehicle is currently in an emergency control state based on the vehicle's state and the environmental state includes: determining the vehicle is currently in an emergency control state when the vehicle's location and motion information indicate it is in a remote area or on a highway; determining the vehicle is currently in an emergency control state when the vehicle's location and motion information indicate it is in a congested urban area; determining the vehicle is currently in an emergency control state when the vehicle's powertrain system indicates a serious engine malfunction and / or a serious transmission system malfunction; determining the vehicle is currently in an emergency control state when the vehicle's powertrain system indicates insufficient battery power and / or an electrical system malfunction; determining the vehicle is currently in an emergency control state when the vehicle is in a severe traffic scenario based on traffic information of the vehicle's environment; and determining the vehicle is currently in an emergency control state when the vehicle is in a severe weather scenario based on weather information of the vehicle's environment.

[0045] In this embodiment, one optional implementation for determining whether a vehicle is currently in an emergency control state based on its vehicle status and the environmental conditions it is in is: acquiring the vehicle's GPS positioning data and motion information collected through onboard sensors (such as wheel speed sensors, acceleration sensors, etc.). When the positioning information indicates that the vehicle is located in a remote area, or when the positioning information and motion information determine that the vehicle is located on a highway, the system determines that the vehicle may be facing an emergency situation, such as needing to quickly traverse complex terrain or take emergency evasive action. At this time, the system determines that the vehicle is in an emergency control state. In this disclosure, the aforementioned remote area is an area determined by the vehicle based on positioning information and preset judgment conditions. The judgment conditions and the scope of the area do not constitute a limitation of this disclosure.

[0046] When a vehicle's location information shows that it is in the city center or a busy traffic area, and the movement information reflects that the vehicle is frequently stopping and starting, it indicates that the vehicle is in a congested traffic situation. At this time, it is determined that the vehicle is in an emergency control state and needs to be pulled over to the side of the road in time to avoid affecting the driving of other vehicles.

[0047] By monitoring fault codes in the engine control unit (ECU) and transmission control unit (TCU), and determining that the vehicle is currently in an emergency control state based on the fault codes, the system can identify serious engine faults (such as cylinder blowout or serious oil leak) or serious transmission faults (such as damaged gearbox gears or broken driveshaft).

[0048] Monitor the status of the battery management system (BMS) and electrical system, and determine that the vehicle is currently in an emergency control state if the battery charge is below a critical value or if there is a fault in the electrical system (such as the motor or controller).

[0049] The vehicle receives surrounding traffic information based on vehicle-to-everything (V2X) technology and / or obtains traffic information around the vehicle through its own sensors. It then analyzes this traffic information to determine traffic conditions, such as traffic accidents, road closures, or severe congestion. When the vehicle is in such adverse traffic conditions, it determines that the vehicle is currently in an emergency control state.

[0050] The vehicle's infotainment system integrates a meteorological data interface to obtain local weather information in real time, and / or obtains weather information of its current location through its own sensors. Based on the obtained weather information, it determines whether the vehicle is currently in a severe weather scenario, such as heavy rain, blizzard, extreme high or low temperatures, etc. These scenarios may seriously affect vehicle performance, such as reduced tire grip and reduced visibility. If it is determined that the vehicle is currently in such a severe weather scenario, it is determined that the vehicle is currently in an emergency control state.

[0051] Through the above specific implementation methods, the anti-gear-jamming method for drive mode switching provided by this disclosure can comprehensively and flexibly determine whether the vehicle is in an emergency control state based on the current actual state and environmental conditions of the vehicle, thereby adjusting the locking strategy of the vehicle's neutral state after the failure of the four-wheel drive mode switching in a timely manner. While effectively preventing the occurrence of gear-jamming, it can ensure the safe driving of the vehicle in various emergency situations.

[0052] In conjunction with the above embodiments, in one implementation, this disclosure also provides a method for preventing gear-striking during drive mode switching. In this method, determining whether the vehicle is currently in an emergency control state includes: determining whether an emergency control request initiated by a user has been received; and determining that the vehicle is currently in an emergency control state based on the received emergency control request.

[0053] In this embodiment, the method of determining whether the vehicle is currently in an emergency control state based on the vehicle status and the environmental conditions in which the vehicle is located is based on the status information obtained through monitoring. The vehicle's control system automatically determines whether it is currently in an emergency control state in order to select the corresponding locking strategy for the vehicle's neutral state. However, this automatic control method cannot take all emergency scenarios into account. Therefore, to ensure that the vehicle is in an emergency control state in any emergency scenario, this disclosure also provides a control button for the driver to select whether the vehicle is in an emergency control state in the current scenario. This control button can be a physical button switch and / or a HUT (Head-Up Display) soft switch.

[0054] Specifically: Inside the vehicle, preferably in a location easily accessible to the driver (such as near the steering wheel, center console, etc.), a dedicated control button is provided to select whether the vehicle is in an emergency control state in the current scenario. When the vehicle is in an emergency scenario but the vehicle's monitoring and control logic has not recognized and determined that the vehicle is in an emergency control state, the user presses this control button to send a request to the vehicle's control system that the vehicle is in an emergency control state. Based on the received request, the vehicle's control system determines that the vehicle is in an emergency control state and then selects the corresponding neutral state locking strategy to lock the neutral state after the low-speed four-wheel drive mode switching fails.

[0055] Based on the same inventive concept, one embodiment of this disclosure provides an anti-gear-striking system for drive mode switching, as shown in Figure 2. The system 200 includes: a first control and monitoring module 201, used to control the vehicle to switch to low-speed four-wheel drive mode according to the vehicle's neutral lock state and the set state of the four-wheel drive shift action signal, and to monitor the switching result; a first set control module 202, used to set a shift timeout warning signal if the switching result is a switching failure; a second control and monitoring module 203, used to control the vehicle to return to high-speed two-wheel drive mode based on the set state of the shift timeout warning signal, and to monitor the return result; a second set control module 204, used to de-set the four-wheel drive shift action signal if the return result is a successful return; and a lock control module 205, used to determine whether to release the vehicle's neutral lock based on the set state of the four-wheel drive shift action signal.

[0056] Optionally, the system 200 further includes: a rollback control module, used to perform a preset number of rollback attempts when the rollback result is a rollback failure; and a second set control module 204, used to stop the rollback action and de-set the four-wheel drive shift action signal when all the rollback attempts fail.

[0057] 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; a second control and monitoring module 203, used to control the vehicle to revert to high-speed two-wheel drive mode based on the set state of the shift timeout warning signal when the vehicle is not currently in an emergency control state, and to monitor the reverting result; and used to control the vehicle to revert to high-speed two-wheel drive mode based on the set state of the shift timeout warning signal when the vehicle is currently in an emergency control state, and to de-set the four-wheel drive shift action signal; and a lock control module 205, used to release the neutral lock of the vehicle based on the set state of the four-wheel drive shift action signal.

[0058] Optionally, the emergency control status determination module includes: a monitoring module for monitoring the vehicle status and the environmental status of the vehicle's surroundings; and an emergency control status determination submodule for determining whether the vehicle is currently in an emergency control state based on the vehicle status and the environmental status, wherein the vehicle status includes the vehicle's location information, motion information, and power system status; and the environmental status of the vehicle's surroundings includes traffic information and weather information.

[0059] Optionally, the emergency control state determination submodule includes: a first emergency control state determination submodule, used to determine that the vehicle is currently in an emergency control state when the vehicle is located in a remote area or on a highway based on the vehicle's location and motion information; a second emergency control state determination submodule, used to determine that the vehicle is currently in an emergency control state when the vehicle is located in a congested urban area based on the vehicle's location and motion information; a third emergency control state determination submodule, used to determine that the vehicle is currently in an emergency control state when the vehicle's engine and / or transmission system has a serious malfunction based on the vehicle's powertrain status; a fourth emergency control state determination submodule, used to determine that the vehicle is currently in an emergency control state when the vehicle's battery is low and / or the electrical system has a malfunction based on the vehicle's powertrain status; a fifth emergency control state determination submodule, used to determine that the vehicle is currently in an emergency control state when the vehicle is located in a severe traffic scenario based on traffic information of the vehicle's environment; and a sixth emergency control state determination submodule, used to determine that the vehicle is currently in an emergency control state when the vehicle is located in a severe weather scenario based on weather information of the vehicle's environment.

[0060] Optionally, the emergency control status determination module includes: an emergency control request determination module, used to determine whether an emergency control request initiated by a user has been received; and an emergency control status determination submodule, used to determine that the vehicle is currently in an emergency control state based on the received emergency control request.

[0061] Based on the same inventive concept, one embodiment of this disclosure provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the anti-tooth-jamming method for drive mode switching as described in the first aspect of this disclosure.

[0062] Based on the same inventive concept, one embodiment of this disclosure provides a vehicle, which is equipped with an anti-gear-striking system for drive mode switching as described in the second aspect of this disclosure, and the vehicle's shifting system executes the anti-gear-striking method for drive mode switching as described in the first aspect of this disclosure, or the vehicle is equipped with a computer-readable storage medium as described in the third aspect of this disclosure.

[0063] As the system implementation is basically similar to the method implementation, it is described in a relatively simple way. For relevant details, please refer to the description of the method implementation.

[0064] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of this disclosure are not limited to the described order of actions, because according to the embodiments of this disclosure, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily necessary for the embodiments of this disclosure.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, embodiments of this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0067] This disclosure describes embodiments of methods, terminal devices (systems), and computer program products according to embodiments of this disclosure with reference to flowchart illustrations and / or block diagrams. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, create means for implementing the functions specified in one or more blocks of the flowchart illustrations and / or one or more blocks of the block diagrams.

[0068] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0069] These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable terminal equipment, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0070] While preferred embodiments of the present disclosure have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0071] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0072] The foregoing has provided a detailed description of a drive mode switching anti-tooth-jamming method, system, medium, and vehicle provided by this disclosure. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A method for preventing gear impact during drive mode switching, wherein, The method includes: Based on the vehicle's neutral lock status and the four-wheel drive shift signal status, control the vehicle to switch to low-speed four-wheel drive mode and monitor the switching result. If the switching result is a switching failure, the shift timeout warning signal is set; Based on the setting status of the shift timeout warning signal, control the vehicle to revert to high-speed two-wheel drive mode and monitor the reversion result; If the reversal result is successful, the four-wheel drive shift action signal is set to exit. Based on the set state of the four-wheel drive shift action signal, determine whether to release the neutral lock of the vehicle.

2. The method for preventing tooth knocking during drive mode switching according to claim 1, wherein, The method further includes: If the rollback fails, perform a preset number of rollback attempts. If all preset number of reversal attempts fail, the reversal action will stop, and the four-wheel drive shift signal will be deactivated.

3. The method for preventing tooth knocking during drive mode switching according to claim 1, wherein, If the switching result is a switching failure, after setting the shift timeout warning signal, the method further includes: Determine if the vehicle is currently under emergency control. If the vehicle is not currently under emergency control, based on the setting status of the shift timeout warning signal, control the vehicle to revert to high-speed two-wheel drive mode and monitor the reverting result. When the vehicle is currently under emergency control, based on the setting state of the shift timeout warning signal, the vehicle is controlled to revert to high-speed two-wheel drive mode, and the four-wheel drive shift action signal is deactivated. Based on the set state of the four-wheel drive shift action signal, the neutral lock of the vehicle is released.

4. The method for preventing tooth knocking during drive mode switching according to claim 3, wherein, Determine whether the vehicle is currently under emergency control, including: Monitor the vehicle's status and the environmental conditions surrounding the vehicle; Based on the vehicle status and the environmental status, determine whether the vehicle is currently in an emergency control state.

5. The method for preventing tooth knocking during drive mode switching according to claim 4, wherein, The vehicle status includes the vehicle's location information, motion information, and power system status; the environmental status of the vehicle's surroundings includes traffic information and weather information.

6. The method for preventing tooth knocking during drive mode switching according to claim 5, wherein, Determining whether the vehicle is currently in an emergency control state based on the vehicle status and the environmental status includes: When the vehicle is located in a remote area or on a highway based on its location and movement information, the vehicle is determined to be in an emergency control state. When the vehicle is located in a congested urban area based on its location and movement information, the vehicle is determined to be in an emergency control state. When the vehicle's powertrain status indicates a serious engine malfunction and / or a serious transmission malfunction, the vehicle is determined to be in an emergency control state. When the vehicle's power system status indicates that the battery is low and / or the electrical system is malfunctioning, the vehicle is determined to be in an emergency control state. When it is determined that the vehicle is in a severe traffic situation based on traffic information of the vehicle's environment, the vehicle is currently under emergency control. When the weather information of the vehicle's environment determines that the vehicle is in a severe weather scenario, the vehicle is determined to be in an emergency control state.

7. The method for preventing tooth knocking during drive mode switching according to claim 3, wherein, Determine whether the vehicle is currently under emergency control, including: Determine if an emergency control request initiated by the user has been received; Based on the received emergency control request, it is determined that the vehicle is currently in an emergency control state.

8. The method for preventing gear impact during drive mode switching according to claim 1, wherein, The method further includes: if the vehicle fails to switch to the low-speed four-wheel drive mode after a preset number of attempts, the switching result is determined to be a switching failure.

9. The method for preventing tooth knocking during drive mode switching according to claim 8, wherein, Determining the switching result as a switching failure includes: If an attempt to switch to the low-speed four-wheel drive mode fails each time, a corresponding prompt message is sent to the display screen to determine whether the user needs to try switching 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 will continue. If the user chooses not to try again, the switching result is determined to be a switching failure, and subsequent operations continue.

10. The method for preventing tooth knocking during drive mode switching according to claim 1, wherein, Setting the shift timeout warning signal is used to inform the vehicle's four-wheel drive system that the vehicle failed to switch to low-speed four-wheel drive mode. The method further includes: based on the setting of the shift timeout warning signal, simultaneously sending corresponding alarm information to the vehicle's display screen to warn the driver.

11. A drive mode switching anti-tooth-jamming system, wherein, The system includes: The first control and monitoring module is used to control the vehicle to switch to low-speed four-wheel drive mode according to the vehicle's neutral lock state and the setting state of the four-wheel drive shift action signal, and to monitor the switching result. The first setting control module is used to set the shift timeout warning signal when the switching result is a switching failure. The second control and monitoring module is used to control the vehicle to revert to high-speed two-wheel drive mode based on the setting state of the shift timeout warning signal, and to monitor the reverting result. The second setting control module is used to de-set the four-wheel drive shift action signal when the retraction result is successful. The locking control module is used to determine whether to release the neutral lock of the vehicle based on the set state of the four-wheel drive shift action signal.

12. A computer-readable storage medium, wherein, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the anti-tooth-jamming method for drive mode switching as described in any one of claims 1 to 10.

13. A vehicle, wherein, The vehicle is provided with an anti-gear-scratching system for drive mode switching as described in claim 11, the vehicle's shifting system performs an anti-gear-scratching method for drive mode switching as described in any one of claims 1-10, or the vehicle is provided with a computer-readable storage medium as described in claim 12.

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