Vehicle control method and apparatus, and electronic device and vehicle

Abstract

A vehicle control method and apparatus, and an electronic device and a vehicle. The method comprises: when a gear-shifting handle of a vehicle is switched to an M gear, determining a target gear according to the magnitude relationship between an actual gear of the vehicle and a first preset gear, wherein the target gear is used for limiting the gear of the vehicle; and using the target gear as a limit to control, according to an accelerator pedal opening degree and vehicle speed of the vehicle, the vehicle to automatically shift the gear. By means of switching a gear-shifting handle of a vehicle to an M gear, part of an automatic gear-shifting function is reserved when a target gear is used as a limit.

Description

Vehicle control method, device, electronic device and vehicle

[0001] This application claims priority to Chinese patent application No. 202310899862.1 filed on July 21, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of vehicles, and in particular to a vehicle control method, device, electronic equipment and vehicle. Background Art

[0003] The vehicle in the related art is matched with a multi-gear automatic transmission, and the control modes of the automatic transmission generally include an automatic mode and a manual mode.

[0004] In automatic mode, the automatic transmission can automatically switch between several gears. In manual mode, the driver is required to switch gears by operating the shift handle.

[0005] In some vehicle operating conditions, such as uphill and undulating roads, automatic transmissions often require frequent shifting if in automatic mode, which increases the risk of shift failures. Manual mode also places a significant workload on the driver. There is an urgent need for a vehicle control method that can reduce shift frequency, stabilize power output, and reduce driver workload. Technical issues

[0006] The present application provides a vehicle control method, device, electronic device and vehicle to solve the problems in the prior art of frequent automatic gear shifting, unstable power output and heavy workload for the driver when manually shifting, thereby reducing the frequency of vehicle gear shifting, stabilizing power output and reducing the workload of the driver. Technical Solutions

[0007] The present application provides a vehicle control method, comprising:

[0008] When the shift handle of the vehicle is switched to the M gear, a target gear is determined according to the magnitude relationship between the actual gear of the vehicle and the first preset gear, and the target gear is used to limit the gear of the vehicle;

[0009] The target gear is used as a limit and the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and vehicle speed of the vehicle.

[0010] According to a vehicle control method provided by the present application, the target gear is an upper gear, and the vehicle is automatically switched to another gear based on the accelerator pedal opening and vehicle speed of the vehicle with the target gear as a limit, including:

[0011] Under the condition that the upper gear limit is not exceeded, the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and vehicle speed of the vehicle.

[0012] According to a vehicle control method provided by the present application, determining a target gear position based on a magnitude relationship between an actual gear position of the vehicle and a first preset gear position includes:

[0013] If the actual gear position is less than or equal to the first preset gear position, determining the target gear position to be the first preset gear position;

[0014] If the actual gear is greater than the first preset gear, the target gear is determined to be a second preset gear; the second preset gear is higher than the first preset gear.

[0015] A vehicle control method provided by the present application further includes:

[0016] In the case where the vehicle's shift handle has been switched to the M gear, when a manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when a manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation, wherein the target gear is less than the vehicle's highest gear.

[0017] According to a vehicle control method provided by the present application, the vehicle further includes a mode switching switch, and the vehicle control method further includes:

[0018] When the mode switching switch is on, when the shift handle is switched to the M gear, the target gear is determined to be the actual gear; when the manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when the manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation.

[0019] According to a vehicle control method provided by the present application, the vehicle further includes an automatic transmission, the automatic transmission includes an automatic transmission control unit and a drive motor, and the vehicle control method further includes:

[0020] After determining the target gear, issuing a gear limit instruction to the automatic transmission control unit and controlling the speed of the drive motor to be less than or equal to a first preset speed based on a PI algorithm;

[0021] The shift limit instruction is used to control the upshift point of the automatic transmission to be a second preset speed; the first preset speed is less than the second preset speed.

[0022] According to a vehicle control method provided by the present application, the second preset gear is one gear higher than the first preset gear.

[0023] According to a vehicle control method provided by the present application, the vehicle further includes an instrument, and the method further includes:

[0024] The instrument is controlled to display prompt information, where the prompt information represents the target gear position.

[0025] The present application also provides a vehicle control device, comprising:

[0026] a determination module, configured to determine a target gear position according to a magnitude relationship between the actual gear position of the vehicle and a first preset gear position when the shift handle of the vehicle is switched to the M gear, wherein the target gear position is used to limit the gear position of the vehicle;

[0027] The control module is used to control the vehicle to automatically switch gears based on the target gear and the accelerator pedal opening and vehicle speed of the vehicle.

[0028] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-described vehicle control methods when executing the program.

[0029] The present application also provides a vehicle for executing any of the vehicle control methods described above, or including any of the vehicle control devices described above, or including any of the electronic devices described above. Beneficial effects

[0030] The vehicle control method, device, electronic device and vehicle provided by the present application, when the vehicle's shift handle is switched to M gear, determine the target gear according to the size relationship between the actual gear of the vehicle and the first preset gear, and the target gear is used to limit the gear of the vehicle; with the target gear as the limit, the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and vehicle speed of the vehicle. The present application switches the shift handle to M gear, retains the automatic shifting function between various gears including the target gear while limiting the target gear, and can solve the problem of frequent shifting in pure automatic mode, thereby reducing the high risk of shifting failure caused by frequent shifting, and can also stabilize the vehicle's power output, and solve the problem of the driver needing to frequently operate the shift handle in pure manual mode, thereby reducing the driver's workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] FIG1 is a flow chart of a vehicle control method according to an embodiment of the present application;

[0033] FIG2 is a second flow chart of a vehicle control method according to an embodiment of the present application;

[0034] FIG3 is a schematic structural diagram of a vehicle control device according to an embodiment of the present application;

[0035] FIG4 is a schematic structural diagram of an electronic device according to an embodiment of the present application. Modes for Carrying Out the Invention

[0036] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0037] In the related art, a vehicle equipped with an automatic transmission with multiple gears includes a shift lever, as well as different gears such as reverse (R), neutral (N), park (P), and forward gears. Forward gears may include D and M. D represents a purely automatic mode. When the shift lever is in D, the vehicle is in purely automatic mode, in which the automatic transmission automatically shifts between multiple gears (e.g., 1st to 6th) based solely on the accelerator pedal position and vehicle speed. M represents a purely manual mode. When the shift lever is in M, the automatic transmission shifts gears solely based on the driver's operation of the shift lever, similar to the manual mode control principle in traditional manual transmission vehicles. For example, when the driver shifts the automatic transmission to 1st gear using the shift lever, the vehicle is locked in 1st gear; when the driver shifts the automatic transmission to 2nd gear using the shift lever, the vehicle is locked in 2nd gear, and so on. When the driver shifts the automatic transmission to 5th gear using the shift lever, the vehicle is locked in 5th gear. That is to say, in the related art, when a vehicle is moving, if the driver wants to make the vehicle move forward, he or she must either use a purely automatic mode or a purely manual mode.

[0038] In the actual working conditions of the vehicle, for example, when the vehicle is going down a long slope, if the vehicle is in pure automatic mode, the vehicle's automatic transmission will continuously shift to a high-speed gear as the downhill speed increases, making the vehicle speed faster and faster. At this time, the foot brake must be used continuously to control the vehicle speed, but frequent foot braking can easily cause the brakes to overheat and fail; if the vehicle is in pure manual mode when going down a long slope, the driver's workload will increase.

[0039] In addition, when the vehicle is going uphill, if the pure manual mode is used, the driver's workload will increase and the driver will not be liberated; if the pure automatic mode is used, the high-speed gear cannot provide large torque, so the vehicle cannot obtain strong traction when going uphill. Therefore, it is not appropriate to use the pure automatic mode when the vehicle is going uphill.

[0040] Also, in some working conditions that require stop-and-go, using pure automatic mode or pure manual mode will result in frequent gear shifting.

[0041] To solve the above problems, the embodiments of the present application provide a vehicle control method, device, electronic device, and vehicle. The vehicle control method, device, electronic device, and vehicle of the present application are described below with reference to Figures 1 to 4. The vehicle control method can be applied to a vehicle controller. As shown in Figure 1, the vehicle control method may include:

[0042] Step 110: When the shift handle of the vehicle is switched to the M gear, a target gear position is determined according to the relative size between the actual gear position of the vehicle and the first preset gear position, and the target gear position is used to limit the gear position of the vehicle;

[0043] Step 120: With the target gear as a limit, the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and vehicle speed.

[0044] The vehicle in the embodiment of the present application has an automatic transmission and a shift handle. Specifically, the automatic transmission can be a hydraulic automatic transmission (Automatic Transmission, AT), a mechanical continuously variable transmission (Continuously Variable Transmission, CVT) or an electronically controlled automatic mechanical transmission (Automated Mechanical Transmission, AMT), etc.

[0045] The vehicle in the embodiment of the present application may include multiple gears, including reverse gear (R gear), neutral gear (N gear), parking gear (P gear), and forward gear. The forward gear may include D gear and M gear. D gear is an automatic gear, representing a purely automatic mode. When the gear shift handle is switched from another gear to D gear, the vehicle can automatically switch gears based on the accelerator pedal opening and vehicle speed.

[0046] The automatic transmission in the embodiment of the present application may include multiple gears. For example, the automatic transmission may be an 8-speed automatic transmission, and the 8-speed automatic transmission may include gears 1 to 8. The automatic transmission may also be a 6-speed automatic transmission, and the 6-speed automatic transmission may include gears 1 to 6. The automatic transmission may also be a 5-speed automatic transmission, and the 5-speed automatic transmission may include gears 1 to 5.

[0047] The M gear in the embodiments of this application differs from the M gear in the related art. In the related art, the M gear is a manual gear, representing a purely manual mode. Furthermore, the control principle of the M gear in the related art and the manual mode in traditional manual transmission vehicles is that the transmission switches gears solely based on the driver's operation of the shift lever. However, in the embodiments of this application, the M gear does not represent a purely manual mode. Furthermore, the embodiments of this application provide improvements to the M gear in the related art.

[0048] Specifically, the M gear in the embodiment of the present application may include a first control mode, which is referred to as the L mode in this embodiment and the following embodiments. When the M gear is in the L mode, when the vehicle's shift handle is switched to the M gear, a target gear position is determined based on the relative size between the vehicle's actual gear position and the first preset gear position. The target gear position is used to limit the vehicle's gear position. With the target gear position as the limit, the vehicle automatically switches gears based on the accelerator pedal opening and vehicle speed.

[0049] Specifically, in the embodiment of the present application, the actual gear position may be the current gear position of the vehicle.

[0050] In an embodiment of the present application, the M gear is further provided with M+ and M-. In the M gear, upshifting can be performed through M+ and downshifting can be performed through M-. For example, if the actual gear is 3rd gear, the shift handle can be pushed toward M+ in the M gear, the actual gear will be upshifted, and the gear after shifting will be 4th gear; if the actual gear is 3rd gear, the shift handle can be pushed toward M- in the M gear, the actual gear will be downshifted, and the gear after shifting will be 2nd gear.

[0051] The vehicle control method of the embodiment of the present application can provide a new gear control mode for the M gear. As described in steps 110 and 120, when the vehicle's shift lever is switched to the M gear, a target gear is determined based on the relative size between the vehicle's actual gear position and a first preset gear position. The target gear position is used to limit the vehicle's gear position. With the target gear position as the limit, the vehicle automatically switches gears based on the vehicle's accelerator pedal opening and vehicle speed. In other words, the M gear in the embodiment of the present application retains the manual shifting function, adds the gear limit function, and also integrates the automatic shifting function.

[0052] Specifically, the first preset gear can be set in advance according to the actual situation of the automatic transmission and the usage scenario of the vehicle. The embodiment of the present application does not impose any restriction on the specific gear position at which the first preset gear is set.

[0053] Specifically, the target gear can be an upper limit gear, that is, with the target gear as the limit, the vehicle is automatically switched according to the vehicle's accelerator pedal opening and vehicle speed. This may mean that without exceeding the upper limit gear, the vehicle is automatically switched according to the vehicle's accelerator pedal opening and vehicle speed.

[0054] In L mode, to distinguish it from the pure automatic mode of D gear, the target gear, that is, the upper gear, is lower than the highest gear of the automatic transmission. For example, if the automatic transmission is a 6-speed transmission, that is, the automatic transmission includes gears 1 to 6, for example, the target gear can be any gear from 1 to 5; if the automatic transmission is an 8-speed transmission, that is, the automatic transmission includes gears 1 to 8, for example, the target gear can be any gear from 1 to 7.

[0055] In some embodiments, the automatic transmission may include N gears, from 1st to Nth, where a first preset gear is one of the N gears, and the first preset gear is lower than the highest gear. Thus, while the vehicle is moving, since the vehicle can monitor its actual gear position in real time, in L mode, when the driver shifts the shift lever from D to M, if the vehicle determines that the actual gear position is less than the first preset gear position, a target gear position, such as the first preset gear position, can be determined. Subsequently, without exceeding the first preset gear position, the vehicle automatically shifts gears between 1st and the first preset gear position based on the accelerator pedal opening and vehicle speed.

[0056] For example, if the automatic transmission includes gears 1 through 5, the first preset gear can be set to 3rd. Thus, while the vehicle is moving, since the vehicle can monitor its actual gear position in real time, when the driver shifts the shift lever from D to M, for example, if the actual gear position is 2nd, the vehicle can determine a target gear position, such as the first preset gear position 3rd, by determining that 2nd is less than 3rd. Subsequently, the vehicle automatically shifts gears between 1st and 3rd based on the accelerator pedal opening and vehicle speed, provided the vehicle does not exceed 3rd.

[0057] In related technologies, for example, when a vehicle is going down a long slope, if the vehicle is in D gear, that is, pure automatic mode, the vehicle's automatic transmission will continuously shift to a high-speed gear as the downhill speed increases, making the vehicle speed faster and faster. At this time, the foot brake must be used continuously to control the vehicle speed, which can easily cause the brake to overheat and fail. If the vehicle is in pure manual mode when going down a long slope, the driver's workload will increase. If the driver is tired, frequent operation of the shift handle may also be dangerous. However, in this embodiment, if the vehicle is going down a long slope, the driver can use the shift handle from D gear to M gear. Since the M gear in the embodiment of the present application has the function of limiting the gear, when the vehicle is going down a long slope, since the actual gear of the vehicle will not exceed the target gear in M ​​gear, the vehicle will not automatically shift to a high-speed gear that exceeds the target gear. Maintaining a lower gear can provide a greater anti-drag braking force, which can greatly reduce the frequency of the driver stepping on the foot brake. That is, the M gear in this embodiment can provide an auxiliary braking function, thereby solving the problem of foot brake failure caused by frequent foot braking; further, in this embodiment, as long as the target gear is not exceeded, the M gear also retains the function of automatic gear switching, thus solving the problem of heavy workload caused by the driver having to constantly operate the shift handle with his hands in pure manual mode. By reducing the driver's workload, excessive driver fatigue can be avoided, thereby improving the safety of driving the vehicle and improving the driver's driving experience.

[0058] In the related art, for example, when a vehicle is traveling up a long slope, if a purely manual mode is used, the driver must manually select the appropriate gear according to the specific road conditions, which increases the driver's workload and does not relieve the driver. If a purely automatic mode is used, unnecessary upshifts are likely to occur, and since high-speed gears cannot provide high torque, the vehicle cannot obtain strong traction when going uphill. In an embodiment of the present application, when the vehicle is going uphill, the shift lever can be used to shift from D gear to M gear, and then the target gear can be limited to a lower gear using the first preset gear. This provides high torque and high traction, making the vehicle effortless when going uphill. At the same time, since the vehicle can automatically shift gears below the target gear, the driver's workload is reduced, excessive driver fatigue is avoided, and the driver's driving safety and driving experience are improved. In addition, the target gear limit in the present application uses PI control, which can limit the vehicle speed and thus the power to a certain extent, thereby suppressing overheating of the drive system. This benefit has been demonstrated in actual application.

[0059] In one embodiment, determining the target gear position according to the magnitude relationship between the actual gear position of the vehicle and the first preset gear position may include:

[0060] In the L mode, if the actual gear position is less than or equal to the first preset gear position, the target gear position is determined to be the first preset gear position;

[0061] If the actual gear is greater than the first preset gear, the target gear is determined to be the second preset gear; the second preset gear is higher than the first preset gear.

[0062] In this embodiment, by setting two preset gears, when the driver switches from other gears, such as D gear, to M gear, the target gear can be limited to either the first preset gear or the second preset gear. The driver can switch according to actual working conditions or operating habits, which can improve the driver's driving experience.

[0063] Specifically, when the M gear is in the L mode, the second preset gear may be one gear higher than the first preset gear.

[0064] Specifically, when the M gear is in L mode, when the vehicle switches from D gear to M gear and the actual gear is greater than the second preset gear, the vehicle can automatically upshift and downshift according to the accelerator pedal opening and vehicle speed. When the actual gear automatically downshifts to the second preset gear, it enters a control mode with the target gear being the second preset gear.

[0065] When ascending a steep slope, if the vehicle's automatic transmission has gears 1 through 5, the first preset gear could be 2nd. This lower gear setting adjusts the power input / output ratio to a high speed ratio and high torque, resulting in strong traction and smooth climbing. Shifting from D to M doesn't require stopping or braking; the shift lever can be used while driving. When in M, the automatic transmission only shifts between 1st and 2nd gears; no matter how hard you press the accelerator, it won't shift to 3rd or higher. Therefore, the high torque of M can be used to climb steeper slopes. Furthermore, in stop-and-go situations, the preset lower gears in M ​​can be used to lock the gear in a low position, reducing wear on the automatic transmission caused by frequent gear shifting.

[0066] Specifically, when the M gear is in the L mode, the L mode includes a preset gear position, which is used to set the upper gear position to the preset gear position when the vehicle's shift handle is switched from other gear positions, such as the D gear, to the M gear.

[0067] In addition, in specific implementations, it is sometimes necessary to limit the target gear to a medium or high speed gear. For example, in some embodiments, when the vehicle is a mine car, if the mine car's automatic transmission includes gears 1 to 5, then when the M gear is in L mode, the first preset gear can be gear 3, and the second preset gear can be gear 4. When the driver uses the mine car's D gear in a pure automatic mode, he can switch to M gear when the actual gear is gear 5 according to his driving habits. At this time, if the M gear is in L mode, since the mine car's actual gear 5 is greater than the first preset gear 3, the target gear is the second preset gear 4. Above the second preset gear, the mine car can automatically downshift according to the accelerator pedal opening and vehicle speed. When the mine car's actual gear automatically downshifts from gear 5 to gear 4, the mine car enters a control mode with gear 4 as the target gear.

[0068] In one embodiment, the vehicle control method may further include:

[0069] When the vehicle's shift handle has been switched to M gear, when a manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when a manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation, where the target gear is less than the vehicle's highest gear.

[0070] Specifically, the step of "when a manual downshift operation is detected, determining the target gear to be the gear corresponding to the manual downshift operation" may specifically include that when a manual downshift operation is detected, if the actual gear of the vehicle is less than or equal to the gear corresponding to the manual downshift operation, the target gear may be determined to be the gear corresponding to the manual downshift operation.

[0071] As mentioned above, when the shift handle is switched from other gears to M gear, the target gear can be limited to the preset gear. In this embodiment, after the shift handle enters M gear, the target gear can be further changed through manual upshifting or manual downshifting operations to further adapt to different working conditions and improve the driving experience.

[0072] In some embodiments, if the vehicle's automatic transmission includes gears 1 to 5, then the first preset gear may be gear 3, and the second preset gear may be gear 4. If the gear is limited to gear 2 or below according to actual working conditions, then after entering gear M, if the actual gear is the second preset gear 4, then the driver can manually downshift, for example, by operating M- to reduce the actual gear to gear 2. When the actual gear is reduced to gear 2, gear 2 becomes the new target gear. Next, the vehicle can automatically switch gears between gear 2 and gear 1.

[0073] In one embodiment, the M gear may further include a second control mode, which is referred to as the S mode. The vehicle may further include a mode switch, which is used to switch between the L mode and the S mode. When the mode switch is closed, the M gear is in the L mode, and when the mode switch is opened, the M gear is in the S mode. Furthermore, as shown in FIG2 , the vehicle control method may further include:

[0074] When the mode switch is on, when the shift handle is switched to M gear, the target gear is determined to be the actual gear; when a manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when a manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation.

[0075] Specifically, the step of "when a manual downshift operation is detected, determining the target gear to be the gear corresponding to the manual downshift operation" may specifically include that when a manual downshift operation is detected, if the actual gear of the vehicle is less than or equal to the gear corresponding to the manual downshift operation, the target gear may be determined to be the gear corresponding to the manual downshift operation.

[0076] This embodiment represents another control method for the M gear. By adding a mode switching switch, the control mode of the M gear is divided into two types. For example, a mode switching switch for the M gear can be set on the vehicle, which can be recorded as a K switch. If the K switch is turned on, the M gear can be said to be in full gear limit mode, hereinafter referred to as the full gear limit mode as S mode. When the M gear is in S mode, when the shift handle is switched from other gears to the M gear, the target gear is no longer the preset first preset gear or the second preset gear, but the actual gear. Furthermore, in S mode, when the vehicle's shift handle has been switched to the M gear, if a manual upshift operation is detected, then the gear corresponding to the manual upshift operation is the target gear. If a manual downshift operation is detected, then the gear corresponding to the manual downshift operation is the target gear, and the target gear, that is, the upper limit gear, can be the highest gear. Correspondingly, when the K switch is closed, the M gear can be said to be in partial gear limit mode, hereinafter referred to as the partial gear limit mode as L mode. In L mode, there are a first preset gear and a second preset gear, and the target gear, that is, the upper limit gear, is lower than the highest gear.

[0077] For example, when the M gear is in S mode, if the vehicle's automatic transmission includes gears 1 to 5, since the mode switch is in the on state, in this state, there is no longer a preset gear for the target gear. Assume that the vehicle is currently in gear 2 in the automatic mode of D gear. At this time, if the driver switches the shift handle from D gear to M gear, the target gear is the actual gear 2. When the driver uses M+ to shift up to the highest gear 5, 5 is the target gear.

[0078] In other words, when the M gear is in S mode, there is no longer a preset gear, and each gear can be the target gear, so that the driver can experience pure manual mode by operating the M gear.

[0079] When the mode switch K is off, the M gear is in L mode, and only some of the vehicle's gears can be used as target gears. When the vehicle's shift handle is switched to the M gear, the target gear is determined based on the relative size between the vehicle's actual gear and the first preset gear. The target gear is the upper limit gear. If the upper limit gear is not exceeded, the vehicle is automatically controlled to switch gears based on the vehicle's accelerator pedal opening and vehicle speed. When the vehicle's shift handle has been switched to the M gear, if a manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when a manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation, wherein the target gear is less than the vehicle's highest gear.

[0080] In this embodiment, a mode switching switch for the M gear is added so that the M gear can be in different control modes. When the driver wants to fully manually control the vehicle, he can press the mode switching switch and the vehicle enters the S mode, which can improve the driver's driving experience.

[0081] In one embodiment, the vehicle may further include an automatic transmission, which may include an automatic transmission control unit (TCU) and a drive motor. The vehicle control method is applied to a vehicle control unit (VCU). The vehicle control method may further include:

[0082] After determining the target gear, a gear limit instruction is sent to the TCU and the speed of the drive motor is controlled to be less than or equal to a first preset speed based on the PI algorithm;

[0083] The shift limit instruction is used to control the upshift point of the automatic transmission to be a second preset speed; the first preset speed is less than the second preset speed.

[0084] In one embodiment, the first preset speed is 3250 rpm, and the second preset speed is 3300 rpm. In this embodiment, the PI algorithm can be used to more accurately control the speed of the drive motor to be below 3250 rpm.

[0085] This embodiment specifically explains how to implement the target gear limit function. The target gear limit is controlled by the PI algorithm, which can limit the vehicle speed and thus the power to a certain extent, thereby having a certain inhibitory effect on the overheating of the drive system.

[0086] In one embodiment, the vehicle may further include an instrument, and the vehicle control method may further include:

[0087] The control instrument displays a prompt message indicating the target gear position, so that the driver can accurately know the highest gear position that the vehicle can reach before manually shifting gears.

[0088] Specifically, the contents that the instrument can display may include: L1, L2, L3, L4, ..., wherein L1 indicates that the M gear is in L mode and the vehicle's current upper gear position is 1st gear;

[0089] L2 indicates that the M gear is in L mode and the vehicle's current upper gear is 2nd gear. In L2 mode, the vehicle can automatically switch gears between 1st and 2nd gears based on the accelerator pedal opening and vehicle speed without exceeding 2nd gear;

[0090] L3 indicates that the M gear is in L mode and the vehicle's current upper gear is 3rd gear. In L3 mode, the vehicle can automatically switch gears between 1st and 3rd gears based on the accelerator pedal opening and vehicle speed without exceeding 3rd gear;

[0091] L4 indicates that the M gear is in L mode and the vehicle's current upper gear is 4th gear. In L4 mode, the vehicle can automatically switch gears between 1st gear and 4th gear according to the accelerator pedal opening and vehicle speed without exceeding 4th gear...

[0092] In some embodiments, when the M gear is in L mode, when the vehicle's shift handle is switched to the M gear, if the actual gear is less than the first preset gear, then the current upper limit gear is the first preset gear, and the instrument can display relevant information about the activation of the first preset gear. For example, the actual gear is 2nd gear, and the first preset gear is 3rd gear. When the M gear is in L mode, when the vehicle's shift handle is switched to the M gear, the instrument can display "L3 activated", and the actual gear is 2nd gear. The vehicle can shift to 3rd gear according to the accelerator pedal opening and vehicle speed, or it can shift to 1st gear according to the accelerator pedal opening and vehicle speed. That is, when L3 is activated, the vehicle can automatically switch gears between 1st gear, 2nd gear and 3rd gear according to the accelerator pedal opening and vehicle speed.

[0093] When the M gear is in L mode, when the vehicle's shift handle is switched to the M gear, if the actual gear is greater than the first preset gear, the current upper limit gear is the second preset gear. When the actual gear reaches the second preset gear, the instrument displays relevant information about the activation of the second preset gear. For example, the actual gear is 5th gear, the first preset gear is 3rd gear, and the second preset gear is 4th gear. When the M gear is in L mode, when the vehicle's shift handle is switched to the M gear, the instrument will not display "L4 activated" because the actual gear is 5th gear. When the vehicle is reduced from 5th gear to 4th gear according to the accelerator pedal opening and vehicle speed, the actual gear becomes 4th gear, and the instrument displays "L4 activated". The vehicle can automatically switch gears between 1st gear and 4th gear according to the accelerator pedal opening and vehicle speed.

[0094] Table 1: Relevant data when the vehicle's M gear is in L mode

[0095] Gear limit mode L1L2L3L4 Maximum gear 1st gear 2nd gear 3rd gear (first preset gear) 4th gear (second preset gear) TCU-controlled forced shift point (revolutions per minute, rpm) 3300rpm 3300rpm 3300rpm 3300rpm Maximum speed limit point controlled by VCU (revolutions per minute, rpm) 3250rpm 3250rpm 3250rpm 3250rpm Maximum stable vehicle speed (kilometers per hour, km / h) 8 km / h 12km / h 18km / h 28km / h

[0096] In some embodiments, the automatic transmission includes gears 1 through 5, with the M gear in L mode. As shown in Table 1, the first preset gear is 3rd gear, the second preset gear is 4th gear, the forced upshift point controlled by the TCU, i.e., the upshift point of the automatic transmission controlled by the TCU, is a second preset speed of 3300 rpm, and the maximum speed limit point controlled by the VCU is a first preset speed of 3250 rpm. In other words, the VCU controls the speed of the drive motor driving the automatic transmission to not exceed 3250 rpm, so that the speed of the drive motor never reaches the forced upshift point of 3300 rpm, thereby implementing the gear limit function of the M gear. The L mode can indicate which gear is the target gear, i.e., the highest gear the vehicle can reach after the target gear is determined. If the target gear is 1st gear, the instrument may display "L1 activated". "L1 activated" indicates that in L1 mode, the current highest gear (that is, the target gear) is 1st gear; if the target gear is 2nd gear, the instrument may display "L2 activated". "L2 activated" indicates that in L2 mode, the current highest gear (that is, the target gear) is 2nd gear; if the target gear is 3rd gear, the instrument may display "L3 activated". "L3 activated" indicates that in L3 mode, the current highest gear (that is, the target gear) is 3rd gear; if the target gear is 4th gear, the instrument may display "L4 activated". "L4 activated" indicates that in L4 mode, the current highest gear (that is, the target gear) is 4th gear.

[0097] The vehicle control method is described in detail below using another specific embodiment in conjunction with FIG2 . In this embodiment, in descending order of gear positions, both the M and D gears in the automatic transmission can include 1st, 2nd, 3rd, 4th, 5th, and 6th gears, for a total of 6 gear positions. The M gear also includes M+ and M-. The driver can manually shift up by operating M+, and can manually shift down by operating M-. The first preset gear position is 3rd gear, and the second preset gear position is 4th gear.

[0098] When the shift handle is in M ​​gear, if the mode switch is turned on, the vehicle enters S mode. S mode indicates that M gear is in full-gear limited gear mode. In S mode, the target gear is the actual gear, and the instrument displays S mode related information.

[0099] For example, if the shift lever was in 5th gear before engaging M, the target gear remains 5th after engaging M, and the instrument panel displays "S5." "S5" serves to remind the driver that S5 mode is active. Subsequently, if the driver does not manually upshift or downshift, the vehicle automatically shifts between 1st and 5th gears based on accelerator pedal position and vehicle speed. Furthermore, if a manual upshift (M+) is detected, the target gear becomes 6th gear, corresponding to the manual upshift, and the instrument panel displays "S6." If a manual downshift (M-) is detected, the target gear becomes the gear corresponding to M-, and the instrument panel displays information related to S mode. In fact, the S mode in this embodiment incorporates a pure manual mode. That is, in S mode, any gear can be the target gear, and any gear can be the upper limit gear. Therefore, the driver can experience pure manual mode in S mode using the shift lever.

[0100] If the mode switch is not turned on, the vehicle enters L mode and determines whether the actual gear is less than or equal to 3rd gear. If so, the instrument displays "L3". "L3" is used to remind the driver that L3 mode is activated and the vehicle enters L3 mode.

[0101] In L3 mode, the vehicle can automatically switch gears between 1st and 3rd gears according to the accelerator pedal opening and vehicle speed without exceeding 3rd gear.

[0102] If the actual gear is greater than 3, then continue to determine whether the actual gear is less than or equal to 4. Assuming the actual gear is 5, since 5 is greater than 4, the vehicle is still in pure automatic mode. Depending on the accelerator pedal opening and vehicle speed, the vehicle may still enter 6 from 5, or 4 from 5. However, when it is detected that the vehicle enters 4, the vehicle enters L4 mode and the instrument displays "L4". Next, in L4 mode, no matter how the accelerator pedal opening and vehicle speed change, the vehicle's gear will no longer exceed 4, and it will only automatically switch gears between 1 and 4 according to the accelerator pedal opening and vehicle speed.

[0103] When the vehicle is in L4 mode, the driver can manually operate M-. If the driver manually operates M- once, the target gear is 3rd gear. If the actual gear is less than or equal to 3rd gear, the instrument displays "L3". If the actual gear is greater than 3rd gear, the instrument still displays "L4"; if the driver manually operates M- twice, the target gear is 2nd gear. If the actual gear is less than or equal to 2nd gear, the instrument displays "L2". If the actual gear is greater than 2nd gear, the instrument still displays "L4"; if the driver manually operates M- three times, the target gear is 1st gear. If the actual gear is less than or equal to 1st gear, the instrument displays "L1". If the actual gear is greater than 1st gear, the instrument still displays "L4".

[0104] When the vehicle is in L3 mode, if the driver manually operates M- once, the target gear is 2nd gear. If the actual gear is less than or equal to 2nd gear, the instrument displays "L2". If the actual gear is greater than 2nd gear, the instrument still displays "L3".

[0105] When the vehicle is in L3 mode, if the driver manually operates M+, the instrument displays corresponding information. For example, if the driver manually operates M+ once, the instrument displays "L4"; if the driver manually operates M+ twice, the instrument displays "L5"; if the driver manually operates M+ three times, the instrument still displays "L5" because in L mode, the target gear cannot be the highest gear.

[0106] When the vehicle is in L2 mode, if the driver manually operates M- once, the target gear is 1st gear. If the actual gear is less than or equal to 1st gear, the instrument displays "L1". If the actual gear is greater than 1st gear, the instrument still displays "L2".

[0107] Regardless of the mode the M gear is in, when the shift handle moves out of the M gear, the vehicle will exit the L mode or S mode.

[0108] In the embodiment of the present application, the mode switching switch can be a button switch, a knob switch, or an electronic switch built into the vehicle control panel.

[0109] In some embodiments, since L mode can meet most working conditions, the vehicle may not be equipped with a mode switching switch for M gear. Then, when the shift handle is switched from other gears such as D gear to M gear, the vehicle will enter L mode by default.

[0110] The vehicle control device provided in the present application is described below. The vehicle control device described below and the vehicle control method described above can be referenced to each other.

[0111] As shown in FIG3 , an embodiment of the present application further provides a vehicle control device, which may include:

[0112] A determination module 310 is configured to determine a target gear position based on a magnitude relationship between the actual gear position of the vehicle and the first preset gear position when the vehicle's shift handle is switched to the M gear, wherein the target gear position is used to limit the vehicle's gear position;

[0113] The control module 320 is used to control the vehicle to automatically switch gears based on the target gear and the vehicle's accelerator pedal opening and vehicle speed.

[0114] In one embodiment, the standard gear is an upper gear, and the control module 320 is specifically configured to control the vehicle to automatically switch gears according to the accelerator pedal opening and vehicle speed of the vehicle without exceeding the upper gear.

[0115] In one embodiment, the determination module 310 can be specifically used to determine that the target gear is the first preset gear if the actual gear is less than or equal to the first preset gear; if the actual gear is greater than the first preset gear, determine that the target gear is the second preset gear; the second preset gear is higher than the first preset gear.

[0116] In one embodiment, the determination module 310 can also be specifically used to determine that the target gear is the gear corresponding to the manual upshift operation when a manual upshift operation is detected when the vehicle's shift handle has been switched to the M gear; and when a manual downshift operation is detected, determine that the target gear is the gear corresponding to the manual downshift operation, wherein the target gear is less than the vehicle's highest gear.

[0117] In one embodiment, the vehicle may further include a mode switching switch, and the determination module 310 may further be specifically used to determine that the target gear is the actual gear when the shift handle is switched to the M gear when the mode switching switch is on; when a manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when a manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation.

[0118] In one embodiment, the vehicle may further include an automatic transmission, which may include an automatic transmission control unit and a drive motor. The control module 320 may be specifically configured to, after determining the target gear, send a gear limit instruction to the automatic transmission control unit and control the speed of the drive motor to be less than or equal to a first preset speed based on a PI algorithm; the gear limit instruction is configured to control the upshift point of the automatic transmission to be a second preset speed; and the first preset speed is less than the second preset speed.

[0119] In one embodiment, the first preset rotational speed is 3250 revolutions per minute, and the second preset rotational speed is 3300 revolutions per minute.

[0120] In one embodiment, the second preset gear is one gear higher than the first preset gear.

[0121] In one embodiment, the vehicle may further include an instrument, and the control module 320 may be specifically configured to control the instrument to display prompt information, where the prompt information represents the target gear position.

[0122] An embodiment of the present application also provides a vehicle for executing the vehicle control method provided by any of the above embodiments, or may include the vehicle control device provided by any of the above embodiments.

[0123] An embodiment of the present application also provides an electronic device, which may include a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the vehicle control method provided in any of the above embodiments is implemented.

[0124] FIG4 illustrates a schematic diagram of the physical structure of an electronic device. As shown in FIG4 , the electronic device may include: a processor 410, a communication interface 420, a memory 430, and a communication bus 440, wherein the processor 410, the communication interface 420, and the memory 430 communicate with each other via the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the vehicle control method in any of the above-mentioned embodiments, the method comprising: when the shift handle of the vehicle is switched to the M gear, determining the target gear according to the size relationship between the actual gear of the vehicle and the first preset gear, the target gear being used to limit the gear of the vehicle; and controlling the vehicle to automatically switch gears according to the accelerator pedal opening and the vehicle speed, with the target gear as the limit.

[0125] In addition, the logical instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0126] On the other hand, the present application also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the vehicle control method in any of the above embodiments, the method including: when the vehicle's shift handle is switched to M gear, the target gear is determined based on the size relationship between the vehicle's actual gear and the first preset gear, and the target gear is used to limit the vehicle's gear; with the target gear as the limit, the vehicle is controlled to automatically switch gears according to the vehicle's accelerator pedal opening and vehicle speed.

[0127] On the other hand, the present application also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the vehicle control method in any of the above embodiments, the method comprising: when the vehicle's shift handle is switched to M gear, determining the target gear position based on the size relationship between the vehicle's actual gear position and the first preset gear position, the target gear position being used to limit the vehicle's gear position; with the target gear position as the limit, controlling the vehicle to automatically switch gears based on the vehicle's accelerator pedal opening and vehicle speed.

[0128] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0129] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle control method, wherein: The method comprises: When the shift handle of the vehicle is switched to the M gear, a target gear is determined according to the magnitude relationship between the actual gear of the vehicle and the first preset gear, and the target gear is used to limit the gear of the vehicle; The target gear is used as a limit and the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and vehicle speed of the vehicle.

2. The vehicle control method according to claim 1, wherein: The target gear is an upper gear, and the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and vehicle speed of the vehicle with the target gear as a limit, including: Under the condition that the upper gear limit is not exceeded, the vehicle is controlled to automatically switch gears according to the accelerator pedal opening and the vehicle speed.

3. The vehicle control method according to claim 1 or 2, wherein: The step of determining the target gear position according to the magnitude relationship between the actual gear position of the vehicle and the first preset gear position includes: If the actual gear position is less than or equal to the first preset gear position, determining the target gear position to be the first preset gear position; If the actual gear is greater than the first preset gear, the target gear is determined to be a second preset gear; the second preset gear is higher than the first preset gear.

4. The vehicle control method according to any one of claims 1 to 3, wherein: The method further comprises: In the case where the shift handle of the vehicle has been switched to the M gear, when a manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when a manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation, wherein the target gear is less than the highest gear of the vehicle.

5. The vehicle control method according to claim 4, wherein: The vehicle further includes a mode switching switch, and the vehicle control method further includes: When the mode switching switch is on, when the shift handle is switched to the M gear, the target gear is determined to be the actual gear; when the manual upshift operation is detected, the target gear is determined to be the gear corresponding to the manual upshift operation; when the manual downshift operation is detected, the target gear is determined to be the gear corresponding to the manual downshift operation.

6. The vehicle control method according to any one of claims 1 to 5, wherein: The vehicle further includes an automatic transmission, the automatic transmission includes an automatic transmission control unit and a drive motor, and the vehicle control method further includes: After determining the target gear position, a gear limit instruction is sent to the automatic transmission control unit and the speed of the drive motor is controlled to be less than or equal to a first preset speed based on a PI algorithm; The shift limit instruction is used to control the upshift point of the automatic transmission to be a second preset speed; the first preset speed is less than the second preset speed.

7. The vehicle control method according to claim 3, wherein: The second preset gear position is one gear position higher than the first preset gear position.

8. The vehicle control method according to any one of claims 1 to 7, wherein: The vehicle further includes a meter, and the method further includes: The instrument is controlled to display prompt information, wherein the prompt information represents the target gear position.

9. A vehicle control device, wherein: The device comprises: a determination module, for determining a target gear position according to a magnitude relationship between an actual gear position of the vehicle and a first preset gear position when a gear shift handle of the vehicle is switched to the M gear, wherein the target gear position is used to limit the gear position of the vehicle; The control module is used to control the vehicle to automatically switch gears based on the target gear and the accelerator pedal opening and vehicle speed of the vehicle.

10. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the vehicle control method according to any one of claims 1 to 8 is implemented.

11. A vehicle, wherein: The vehicle is used to execute the vehicle control method according to any one of claims 1 to 8, or includes the vehicle control device according to claim 9, or includes the electronic device according to claim 10.

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