Vehicle control method, system and electronic device

Abstract

The application discloses a vehicle control method, system and electronic equipment. If the vehicle is in a driving automatic switching mode, driving information of the vehicle is obtained. The driving state of the vehicle is determined based on the driving information, and the accelerator pedal information is monitored based on the driving state of the vehicle. If it is determined that the change amount of the accelerator pedal information in a first period is greater than a first threshold value, the drop rate of the forward output torque of the transfer of the vehicle is adjusted from a first drop rate to a second drop rate, wherein the accelerator pedal information decreases from a first value to a second value in the first period, and the second drop rate is less than the first drop rate.

Description

A vehicle control method, system and electronic device Technical Field

[0001] This application relates to the field of vehicle control, and more particularly to an interface information processing method, system, and electronic device. Background Technology

[0002] The vehicle's four-wheel drive mode is either 4H or 4L. As long as the vehicle is in four-wheel drive mode, the torque and speed of the front and rear axles are the same, thereby improving the vehicle's ability to get out of trouble.

[0003] When the vehicle is in four-wheel drive AUTO mode, that is, when the vehicle is in the automatic switching mode between four-wheel drive and two-wheel drive, if the vehicle is driving on unpaved roads, such as slopes, sand, rocks, etc., when using the accelerator, the vehicle will lurch when releasing the accelerator, causing the vehicle to drive unevenly. Summary of the Invention

[0004] In view of the above, this application provides a vehicle control method, system, and electronic device, the specific solutions of which are as follows:

[0005] A vehicle control method, comprising:

[0006] If the vehicle is in automatic drive switching mode, obtain the vehicle's driving information;

[0007] The driving status of the vehicle is determined based on the driving information, and the accelerator pedal information is monitored based on the driving status of the vehicle.

[0008] If it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease, wherein the value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0009] Furthermore, adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease includes:

[0010] A first torque is determined when the value of the accelerator pedal information is a first value, and a second torque is determined when the value of the accelerator pedal information is a second value;

[0011] The torque adjustment duration is determined based on the vehicle's driving parameters;

[0012] Based on the difference between the first torque and the second torque and the torque adjustment time, a second descent rate is determined, and the descent rate of the forward output torque of the transfer case is adjusted from the first descent rate to the second descent rate.

[0013] Furthermore,

[0014] The driving information includes: accelerator pedal information, slope information, and transmission gear information.

[0015] Furthermore, determining the vehicle's driving status based at least on the driving information includes:

[0016] The estimated driving status of the vehicle is determined based on the accelerator pedal information and the slope information.

[0017] Determine whether the estimated driving state of the vehicle matches the gear position information of the transmission. If they match, determine the estimated driving state of the vehicle as the driving state of the vehicle.

[0018] Furthermore, determining the vehicle's driving status based on the driving information, and monitoring the accelerator pedal information based on the vehicle's driving status, includes:

[0019] Based on the driving information, determine whether the vehicle is traveling under specific road conditions;

[0020] If it is determined that the vehicle is traveling under specific road conditions, the accelerator pedal information is monitored.

[0021] Furthermore, if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease includes:

[0022] If it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the vehicle speed information is determined.

[0023] Based on the vehicle speed information, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease.

[0024] Furthermore, adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease based on the vehicle speed information includes:

[0025] If the vehicle speed is determined to be greater than the second threshold, the forward output torque of the vehicle's transfer case is reduced based on the first descent rate.

[0026] If it is determined that the vehicle speed information is not greater than the second threshold, the forward output torque of the vehicle's transfer case is reduced based on the second descent rate.

[0027] A vehicle control system, comprising:

[0028] The acquisition unit is used to acquire the vehicle's driving information when the vehicle is in automatic drive switching mode;

[0029] The determining unit is used to determine the driving status of the vehicle based on the driving information, and to monitor the accelerator pedal information based on the driving status of the vehicle.

[0030] The reduction unit is used to adjust the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease when it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold. The value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0031] An electronic device, comprising:

[0032] The processor is configured to obtain vehicle driving information when the vehicle is in automatic drive switching mode; determine the vehicle driving state based at least on the driving information; monitor the accelerator pedal information based on the vehicle driving state; if it is determined that the change in the accelerator pedal information in a first time period is greater than a first threshold, adjust the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease, wherein the value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0033] The memory is used to store the program used by the processor to execute the above-described processing procedure.

[0034] A vehicle comprising:

[0035] A control device for performing the vehicle control method described in any of the above.

[0036] As can be seen from the above technical solutions, the vehicle control method, system, and electronic equipment disclosed in this application, when the vehicle is in automatic drive switching mode, obtains the vehicle's driving information; determines the vehicle's driving state based on the driving information; monitors the accelerator pedal information based on the vehicle's driving state; if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease. Specifically, the value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease. This solution monitors the accelerator pedal information after determining the vehicle's driving state to ensure that when the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is reduced. This reduces the rate of decrease of the forward output torque of the vehicle's transfer case, thus preventing sudden wheel speed changes and vehicle jerking when the accelerator pedal information decreases rapidly, thereby improving the driving and riding experience. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 is a flowchart of a vehicle control method disclosed in an embodiment of this application;

[0039] Figure 2 is a schematic diagram of a transfer case disclosed in an embodiment of this application;

[0040] Figure 3 is a flowchart of a vehicle control method disclosed in an embodiment of this application;

[0041] Figure 4 is a schematic diagram of the curve for reducing the forward output torque of the transfer case based on the first descent rate;

[0042] Figure 5 is a schematic diagram of a curve showing the reduction of the forward output torque of the transfer case based on a second descent rate after reducing the first descent rate, as disclosed in an embodiment of this application.

[0043] Figure 6 is a flowchart of a vehicle control method disclosed in an embodiment of this application;

[0044] Figure 7 is a schematic diagram of the structure of a vehicle control system disclosed in an embodiment of this application;

[0045] Figure 8 is a schematic diagram of the structure of an electronic device disclosed in an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] This application discloses a vehicle control method, the flowchart of which is shown in Figure 1, including:

[0048] Step S11: If the vehicle is in automatic drive switching mode, obtain the vehicle's driving information;

[0049] Step S12: Determine the vehicle's driving status based on driving information, and monitor the accelerator pedal information based on the vehicle's driving status;

[0050] Step S13: If it is determined that the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from the first rate of decrease to the second rate of decrease, wherein the accelerator pedal information decreases from the first value to the second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0051] A torque-on-demand (TOD) transfer case is a four-wheel drive solution for vehicles with a longitudinally mounted engine chassis. In multi-axle vehicles, a transfer case is needed to distribute the output power to each drive axle. The function of the transfer case is to distribute the power output from the transmission to each drive axle and further increase the torque.

[0052] Figure 2 shows a schematic diagram of the transfer case, which includes: a combination sleeve 201, planetary gears 202, planetary carriers 203, sun gear 204, input shaft 205, large gear ring 206, high / low gear shift fork 207, front housing 208, shift fork support shaft 209, torsion spring 210, shift cam 211, front output shaft 212, output sprocket 213, motor 214, camshaft 215, drive chain 216, rear output shaft 217, rear housing 218, and input sprocket 219.

[0053] The transfer case replaces the gear-type center differential with an electronically controlled multi-plate clutch. Inside the transfer case, the power output from the transmission is directly transmitted to the rear axle driveshaft via a high- and low-speed planetary gear set, while also connecting to a multi-plate clutch. Similarly, the input end of the front axle is also connected to a multi-plate clutch.

[0054] When no power is applied, the multi-plate clutches are unloaded and rotate independently, which is the rear-wheel drive 2H state. When fully loaded with power, the multi-plate clutches are attracted and pressed by the electromagnetic coil, and power is transmitted to the front axle through the engaged multi-plate clutches, which is the four-wheel drive 4H state. If the transfer case is in low gear, it is the four-wheel drive 4L state. When a speed difference is required between the front and rear axles, the transfer case control unit controls the on / off state of the electromagnetic coil, thereby controlling the engagement degree of the multi-plate clutches. The energization is in the form of a duty cycle, from 0-100%. Relying on the slippage and partial engagement of the multi-plate clutches, the differential speed between the front and rear axles is achieved. At the same time, it can also limit the slippage of slipping axles, all controlled by the electromagnetic coil. The transfer case control unit monitors the transmission output shaft speed signal, wheel speed signal, judges the differential speed requirement, axle slippage state, and driver commands, and controls the engagement degree of the electromagnetic coil multi-plate clutches to achieve four-wheel drive control.

[0055] When the vehicle is in four-wheel drive mode, the mode is either 4H or 4L, which makes the torque and speed of the front and rear axles the same to improve the vehicle's ability to get out of trouble. When the transfer case is in four-wheel drive automatic AUTO mode, if the vehicle is driving on unpaved roads, such as slopes, sand, or rocks, the vehicle may lurch when releasing the accelerator after applying heavy throttle, resulting in an uneven driving experience.

[0056] Based on this, this solution monitors the accelerator pedal information according to this specific road condition. When certain conditions are met, the rate of decrease of the forward output torque of the transfer case is adjusted from the first rate of decrease to the second rate of decrease. This is so that when the accelerator is released, the rate of decrease of the forward output torque of the transfer case is reduced, thereby avoiding the problem of vehicle jerking caused by the forward output torque of the transfer case decreasing to a low value instantly.

[0057] Specifically, the system will only determine whether the vehicle is in a specific road condition when the vehicle is in automatic drive switching mode.

[0058] The vehicle is in automatic drive switching mode, i.e., in four-wheel drive AUTO mode. Only when the vehicle is in four-wheel drive AUTO mode will it automatically adjust between four-wheel drive and two-wheel drive modes based on current driving parameters or status, which will cause the rapid drop in forward torque output from the transfer case. If it is determined that the vehicle is not in four-wheel drive AUTO mode, no further processing is required.

[0059] Once the vehicle is determined to be in automatic drive switching mode, the vehicle's driving information is obtained to determine whether the vehicle is currently driving on a specific road condition. If the vehicle is determined to be driving on a specific road condition, the accelerator pedal information is monitored to determine whether the preset rate of decrease of the forward output torque of the transfer case needs to be adjusted.

[0060] The vehicle's driving information includes at least: accelerator pedal information and slope information. Accelerator pedal information determines the current accelerator pedal opening, while slope information determines whether the vehicle is currently driving on a slope. If both the accelerator pedal opening and slope information reach a threshold, the vehicle is determined to be driving under specific road conditions. In this case, continuous monitoring of the accelerator pedal information is necessary to adjust the preset rate of torque reduction for the transfer case when needed.

[0061] If it is determined that the vehicle's accelerator pedal opening has reached the accelerator pedal opening threshold, but the slope of the ramp information has not reached the slope threshold, then it can be determined that the vehicle is not currently driving under specific road conditions, and there is no need to adjust the preset descent rate.

[0062] When the vehicle is in automatic drive switching mode and is driving under specific road conditions, the accelerator pedal opening is continuously monitored to determine the amount of change in the accelerator pedal opening in each time period.

[0063] Each time period can be a pre-set unit time period, such as 0.1s. The change in accelerator pedal opening within each time period is determined. For example, in a certain time period, the accelerator pedal opening decreases from 80% to 0%; in another time period, the accelerator pedal opening decreases from 70% to 30%; and in yet another time period, the accelerator pedal opening increases from 40% to 70%.

[0064] Specifically, it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold. The change is a decrease in the value corresponding to the accelerator pedal information, that is, a decrease from the first value to the second value. In other words, what is actually determined is that the amount by which the accelerator pedal opening decreases in the first time period reaches the first threshold.

[0065] For example, if the first threshold is 60%, then if the accelerator pedal opening decreases from 80% to 0% within a certain period, the decrease is greater than 60%, and the preset rate of decrease of the forward output torque of the transfer case needs to be reduced. As another example, if the first threshold is 60%, then if the accelerator pedal opening decreases from 70% to 30% within a certain period, the decrease is less than 60%, and there is no need to reduce the preset rate of decrease of the forward output torque of the transfer case; the forward output torque of the transfer case can be reduced simply by using the preset rate of decrease.

[0066] When the accelerator pedal opening decreases, and the amount of decrease exceeds the first threshold in the first time period, the vehicle switches from automatic four-wheel drive to automatic two-wheel drive. The torque transmitted from the transfer case to the front axle should be adjusted to 0. If the torque is adjusted according to the preset rate of decrease, the rate of torque decrease will be too fast, resulting in sudden changes in front wheel speed and causing the vehicle to jerk. However, if the preset rate of decrease is reduced, the rate of torque decrease will be slower. The increased time for torque decrease will overcome the problem of sudden changes in front wheel speed, thus avoiding the problem of vehicle jerking.

[0067] The vehicle control method disclosed in this embodiment obtains the vehicle's driving information when the vehicle is in automatic drive switching mode; determines the vehicle's driving state based on the driving information; monitors the accelerator pedal information based on the vehicle's driving state; if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease. Specifically, the value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease. This solution monitors the accelerator pedal information after determining the vehicle's driving state to ensure that when the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is reduced. This reduces the rate of decrease of the forward output torque of the vehicle's transfer case, thus preventing sudden wheel speed changes and vehicle jerking when the value of the accelerator pedal information decreases rapidly, thereby improving the driving and riding experience.

[0068] This embodiment discloses a vehicle control method, the flowchart of which is shown in Figure 3, including:

[0069] Step S31: If the vehicle is in automatic drive switching mode, obtain the vehicle's driving information;

[0070] Step S32: Determine the vehicle's driving status based on driving information, and monitor the accelerator pedal information based on the vehicle's driving status;

[0071] Step S33: If it is determined that the change in the accelerator pedal information in the first time period is greater than the first threshold, determine the first torque when the value of the accelerator pedal information is the first value, and determine the second torque when the value of the accelerator pedal information is the second value.

[0072] Step S34: Determine the torque adjustment duration based on the vehicle's driving parameters;

[0073] Step S35: Determine the second decreasing rate based on the difference between the first torque and the second torque and the torque adjustment time, and adjust the decreasing rate of the forward output torque of the transfer case from the first decreasing rate to the second decreasing rate.

[0074] When the vehicle is in automatic drive switching mode, if it is determined that the vehicle is driving on a specific road condition and that the change in accelerator pedal information in the first time period is greater than the first threshold, that is, when it decreases from the first value to the second value, the rate of decrease of the forward output torque of the transfer case needs to be reduced.

[0075] The reduction of the descent rate can be based on the vehicle's driving conditions, i.e., determining how much the torque needs to be reduced and the duration of the descent. Then, by dividing the descent value by the duration of the descent, the second descent rate can be obtained. The second descent rate is the rate obtained after reducing the first descent rate. The forward output torque of the transfer case can be reduced directly based on the obtained second descent rate.

[0076] If the change in accelerator pedal information in the first time period is greater than the first threshold, it is determined that the accelerator pedal opening in the first time period is reduced from the first value to the second value. Therefore, it is necessary to determine the first torque when the accelerator pedal opening is the first value and the second torque when the accelerator pedal opening is the second value, so as to obtain the value of the torque that needs to be reduced, that is, the difference between the first torque and the second torque.

[0077] Next, the torque adjustment duration is determined, which is the time required to reduce the first torque to the second torque. The torque adjustment duration can be determined based on the vehicle's driving parameters, specifically the first torque and the second torque. When the difference between the two torques is greater than a first specific value, the first torque adjustment duration can be set; when the difference between the two torques is between the first and second specific values, the second torque adjustment duration can be set. Therefore, different torque adjustment durations can be set for different vehicle states, resulting in different rates of decrease in the forward output torque of the transfer case.

[0078] Alternatively, the vehicle's driving parameters used to determine the torque adjustment duration can be vehicle speed, etc.

[0079] Different torque adjustment durations correspond to different rates of decrease in the forward output torque of the transfer case. If the torque difference to be adjusted is the same, the longer the torque adjustment duration, the slower the rate of decrease in the forward output torque of the transfer case; the shorter the torque adjustment duration, the faster the rate of decrease in the forward output torque of the transfer case.

[0080] The first descent rate is the rate at which the initial transfer case outputs torque in the vehicle decreases. When the first descent rate needs to be reduced, the torque adjustment time will inevitably become longer. For example, when the torque difference to be adjusted is the same, a torque adjustment time of 0.2s corresponds to the first descent rate, while a torque adjustment time of 0.7s corresponds to the second descent rate obtained after reducing the first descent rate.

[0081] As shown in Figures 4 and 5, Figure 4 is a schematic diagram of reducing the forward output torque of the transfer case based on the initial first descent rate, and Figure 5 is a schematic diagram of reducing the forward output torque of the transfer case based on the second descent rate after reducing the first descent rate.

[0082] In both Figures 4 and 5, the accelerator pedal opening decreases within a certain time period. In Figure 4, the transfer case torque curve decreases to the second torque in a shorter time, such as 0.2s, while in Figure 5, the transfer case torque curve decreases to the second torque over a longer period, such as 0.7s. In Figure 4, the front wheel speed curve shows abrupt changes, while in Figure 5, the front wheel speed curve is relatively flat without abrupt changes.

[0083] Furthermore, after obtaining the second decreasing rate of the forward output torque of the transfer case, during the process of reducing the forward output torque of the transfer case from the first torque to the second torque, the torque can be reduced in segments based on the second decreasing rate. That is, within the torque adjustment time, each reduction of the forward output torque of the transfer case only reduces a certain specific value. As long as the torque is reduced from the first torque to the second torque within the torque adjustment time, it is sufficient.

[0084] For example: When reducing torque based on a preset decreasing rate, within a 0.2s torque adjustment period, the torque is reduced at a frequency of 45% of the total torque according to the first decreasing rate, i.e., each reduction is 45% of the first torque. When reducing torque based on an adjusted second decreasing rate, within a 0.7s torque adjustment period, the torque is reduced at a frequency of 15% of the total torque according to the second decreasing rate, i.e., each reduction is 15% of the first torque. For example: when reducing torque based on the first decreasing rate, 1000 N.m is reduced to 0 at 45% / time in 0.2s; when reducing torque based on the adjusted second decreasing rate, 1000 N.m is reduced to 0 at 15% / time in 0.7s.

[0085] The vehicle control method disclosed in this embodiment, if the vehicle is in automatic drive switching mode, obtains the vehicle's driving information; determines the vehicle's driving state based at least on the driving information, and monitors the accelerator pedal information based on the vehicle's driving state; if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease, wherein the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease. This solution monitors the accelerator pedal information after determining the vehicle's driving state to ensure that when the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is reduced. This reduces the rate of decrease of the forward output torque of the vehicle's transfer case, thereby preventing sudden wheel speed changes and vehicle jerking when the value corresponding to the accelerator pedal information decreases rapidly, thus improving the driving and riding experience. In addition, this solution determines the torque adjustment duration based on the vehicle's driving parameters and determines the second descent rate based on the torque adjustment duration, making the determination of the second descent rate more consistent with the vehicle's driving parameters, thereby improving the user experience.

[0086] This embodiment discloses a vehicle control method, the flowchart of which is shown in Figure 6, including:

[0087] Step S61: If the vehicle is in automatic drive switching mode, obtain the vehicle's accelerator pedal information, slope information, and transmission gear information.

[0088] Step S62: Determine the vehicle's estimated driving status based on accelerator pedal information and slope information;

[0089] Step S63: Determine whether the vehicle's estimated driving state matches the transmission gear information. If they match, determine the vehicle's estimated driving state as the vehicle's driving state.

[0090] Step S64: Monitor the accelerator pedal information based on the vehicle's driving status;

[0091] Step S65: If it is determined that the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from the first rate of decrease to the second rate of decrease, wherein the value of the accelerator pedal information decreases from the first value to the second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0092] Vehicle driving information may include: accelerator pedal information, slope information, and transmission gear information.

[0093] When determining the vehicle's driving status, the estimated driving status of the vehicle can be determined based on the accelerator pedal information and slope information. After determining the estimated driving status, the estimated driving status can be further determined based on the transmission gear signal to determine whether the estimated driving status is accurate.

[0094] For example, when the accelerator pedal opening is greater than 80% and the slope is greater than 20 degrees, the estimated driving state can be determined as: the vehicle is driving on a slope, sand, or rocky road. At this time, the vehicle's transmission gear signal can be further obtained. If the vehicle is driving on the above-mentioned road surface, it usually requires a large torque, so the transmission gear signal is usually low. Therefore, if it is determined that the transmission gear is 3rd gear or lower at this time, the driving state of the vehicle can be determined as: the vehicle is driving on a slope, sand, or rocky road.

[0095] For example, when the accelerator pedal opening is greater than 80% and the slope is greater than 20 degrees, the estimated driving state can be determined as follows: the vehicle is driving on a slope, sand, or rocky road. At this time, the transmission gear signal can be obtained. If it is determined that the transmission gear is 4th gear or higher, it indicates that the current torque is low and the vehicle is not driving on the above-mentioned road surface. Therefore, the estimated driving state is inaccurate. In this case, there is no need to continue the subsequent processing of reducing the preset descent rate.

[0096] Furthermore, when it is determined that the change in accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from the first rate of decrease to the second rate of decrease. This can be achieved by: if it is determined that the change in accelerator pedal information in the first time period is greater than the first threshold, determining the vehicle speed information; and adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from the first rate of decrease to the second rate of decrease based on the vehicle speed information.

[0097] When it is determined that the change in accelerator pedal information in the first time period is greater than the first threshold, it is also necessary to further determine the current vehicle speed information. If the vehicle speed is high, even if the accelerator pedal opening is large, the forward torque output of the four-wheel drive will be small. At this time, even if the accelerator pedal opening changes to 0 at an instant, the change in torque is small, so there will be no sudden change in the front wheel speed and no vehicle jerking problem.

[0098] Therefore, when it is determined that the change in accelerator pedal information in the first time period is greater than the first threshold, the current vehicle speed information is further determined. If the vehicle speed information is greater than the second threshold, the forward output torque of the vehicle's transfer case is reduced based on the first rate of decrease. That is, the first rate of decrease of the forward output torque of the transfer case is not adjusted, and the forward output torque of the transfer case is reduced directly based on the first rate of decrease.

[0099] If the vehicle speed information is not greater than the second threshold, the vehicle speed is low. At this time, the throttle opening is large. If the throttle opening suddenly becomes 0, the torque change is also large, which can easily cause sudden changes in the front wheel speed. Therefore, at this time, the first descent rate needs to be reduced to obtain the second descent rate, so as to reduce the descent rate of the transfer case's forward output torque. Based on the second descent rate, the transfer case's forward output torque is reduced, thereby avoiding sudden changes in the front wheel speed and preventing the vehicle from jerking.

[0100] The vehicle control method disclosed in this embodiment obtains the vehicle's driving information when the vehicle is in automatic drive switching mode; determines the vehicle's driving state based on the driving information; monitors the accelerator pedal information based on the vehicle's driving state; if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease. Specifically, the value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease. This solution monitors the accelerator pedal information after determining the vehicle's driving state to ensure that when the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from the first rate of decrease to the second rate of decrease. This reduces the rate of decrease of the forward output torque of the vehicle's transfer case, thus preventing sudden wheel speed changes and vehicle jerking when the accelerator pedal information decreases rapidly, thereby improving the driving and riding experience. In addition, after determining the vehicle's estimated driving status based on accelerator pedal information and slope information, the estimated driving status is further verified based on transmission gear information to ensure the accuracy of the determined vehicle driving status.

[0101] This embodiment discloses a vehicle control system, the structural schematic of which is shown in Figure 7, including:

[0102] Get unit 71, determine unit 72 and reduce unit 73.

[0103] The obtaining unit 71 is used to obtain the vehicle's driving information when the vehicle is in the automatic drive switching mode;

[0104] The determining unit 72 is used to determine the driving status of the vehicle based on the driving information, and to monitor the accelerator pedal information based on the driving status of the vehicle.

[0105] The reduction unit 73 is used to adjust the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease when it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold. The accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0106] Furthermore, the reduction unit is used for:

[0107] The system determines the first torque when the accelerator pedal information value is a first value, and the second torque when the accelerator pedal information value is a second value; it determines the torque adjustment duration based on the vehicle's driving parameters; it determines the second descent rate based on the difference between the first torque and the second torque and the torque adjustment duration, and adjusts the descent rate of the transfer case's forward output torque from the first descent rate to the second descent rate.

[0108] Furthermore, driving information includes: accelerator pedal information, slope information, and transmission gear information.

[0109] Furthermore, the determining unit is used for:

[0110] The estimated driving state of the vehicle is determined based on the accelerator pedal information and slope information; it is then determined whether the estimated driving state of the vehicle matches the transmission gear information. If they match, the estimated driving state of the vehicle is determined as the driving state of the vehicle.

[0111] Furthermore, the determining unit is used for:

[0112] At least based on driving information, determine whether the vehicle is traveling on a specific road condition; if it is determined that the vehicle is traveling on a specific road condition, monitor the accelerator pedal information.

[0113] Furthermore, the reduction unit is used for:

[0114] If the change in accelerator pedal information in the first time period is greater than the first threshold, the vehicle speed information is determined; based on the vehicle speed information, the rate of decrease in the forward output torque of the vehicle's transfer case is determined. Driving information includes: accelerator pedal information, slope information, and transmission gear information.

[0115] Furthermore, the reduction unit is used for:

[0116] If the vehicle speed is determined to be greater than the second threshold, the forward output torque of the vehicle's transfer case is reduced based on the first descent rate; if the vehicle speed is determined to be less than the second threshold, the forward output torque of the vehicle's transfer case is reduced based on the second descent rate.

[0117] The vehicle control system disclosed in this embodiment is implemented based on the vehicle control method disclosed in the above embodiments, and will not be described again here.

[0118] The vehicle control system disclosed in this embodiment obtains the vehicle's driving information when the vehicle is in automatic drive switching mode; determines the vehicle's driving state based on the driving information; and monitors the accelerator pedal information based on the vehicle's driving state. If it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease. Specifically, the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease. This solution monitors the accelerator pedal information after determining the vehicle's driving state to ensure that when the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from the first rate of decrease to the second rate of decrease. This reduces the rate of decrease of the forward output torque of the vehicle's transfer case, thus preventing sudden wheel speed changes and vehicle jerking when the accelerator pedal information decreases rapidly, thereby improving the driving and riding experience.

[0119] This embodiment discloses an electronic device, the structural schematic diagram of which is shown in Figure 8, including:

[0120] Processor 81 and memory 82.

[0121] The processor 81 is used to obtain the vehicle's driving information when the vehicle is in the automatic drive switching mode; determine the vehicle's driving state based on the driving information; monitor the accelerator pedal information based on the vehicle's driving state; if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, adjust the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease, wherein the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

[0122] The memory 82 is used to store the program for the processor to execute the above processing procedure.

[0123] The electronic device disclosed in this embodiment is implemented based on the vehicle control method disclosed in the above embodiments, and will not be described again here.

[0124] The electronic device disclosed in this embodiment, when the vehicle is in automatic drive switching mode, obtains the vehicle's driving information; determines the vehicle's driving state based on the driving information, and monitors the accelerator pedal information based on the vehicle's driving state; if it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease, wherein the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease. This solution monitors the accelerator pedal information after determining the vehicle's driving state to ensure that when the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease. This reduces the rate of decrease of the forward output torque of the vehicle's transfer case, thereby preventing sudden wheel speed changes and vehicle jerking when the accelerator pedal information decreases rapidly, thus improving the driving and riding experience.

[0125] This application embodiment also provides a readable storage medium storing a computer program thereon. The computer program is loaded and executed by a processor to implement the steps of the above-described vehicle control method. The specific implementation process can be referred to the description of the corresponding part of the above embodiment, and will not be repeated in this embodiment.

[0126] This application also proposes a computer program product or computer program that includes computer instructions stored in a computer-readable storage medium. The processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the methods provided in the various optional implementations of the vehicle control method or vehicle control system described above. Specific implementation processes can be referred to the descriptions of the corresponding embodiments above, and will not be repeated here.

[0127] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0128] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0129] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0130] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle control method, characterized in that, include: If the vehicle is in automatic drive switching mode, obtain the vehicle's driving information; The driving status of the vehicle is determined based on the driving information, and the accelerator pedal information is monitored based on the driving status of the vehicle. If it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from a first rate of decrease to a second rate of decrease, wherein the value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

2. The method according to claim 1, characterized in that, The step of adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease includes: determining a first torque when the value of the accelerator pedal information is a first value, and determining a second torque when the value of the accelerator pedal information is a second value; determining a torque adjustment duration based on the vehicle's driving parameters; determining a second rate of decrease based on the difference between the first torque and the second torque and the torque adjustment duration, and adjusting the rate of decrease of the forward output torque of the transfer case from the first rate of decrease to the second rate of decrease.

3. The method according to claim 1, characterized in that, The driving information includes: accelerator pedal information, slope information, and transmission gear information.

4. The method according to claim 3, characterized in that, The step of determining the vehicle's driving status based on the driving information includes: determining the vehicle's estimated driving status based on the accelerator pedal information and slope information; determining whether the vehicle's estimated driving status matches the transmission gear information; if they match, determining the vehicle's estimated driving status as the vehicle's driving status.

5. The method according to claim 1, characterized in that, The step of determining the vehicle's driving status based on the driving information and monitoring the accelerator pedal information based on the vehicle's driving status includes: determining whether the vehicle is driving under specific road conditions based on the driving information; and if it is determined that the vehicle is driving under specific road conditions, monitoring the accelerator pedal information.

6. The method according to claim 1, characterized in that, The step of adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease if the change in the accelerator pedal information during the first time period is greater than a first threshold includes: if the change in the accelerator pedal information during the first time period is greater than a first threshold, determining the vehicle speed information; and adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease based on the vehicle speed information.

7. The method according to claim 6, characterized in that, The step of adjusting the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease based on the vehicle speed information includes: if it is determined that the vehicle speed information is greater than a second threshold, reducing the forward output torque of the vehicle's transfer case based on the first rate of decrease; if it is determined that the vehicle speed information is not greater than the second threshold, reducing the forward output torque of the vehicle's transfer case based on the second rate of decrease.

8. A vehicle control system, characterized in that, include: The acquisition unit is used to acquire the vehicle's driving information when the vehicle is in automatic drive switching mode; The determining unit is used to determine the driving status of the vehicle based on the driving information, and to monitor the accelerator pedal information based on the driving status of the vehicle. The reduction unit is used to adjust the rate of decrease of the forward output torque of the vehicle's transfer case from a first rate of decrease to a second rate of decrease when it is determined that the change in the accelerator pedal information in the first time period is greater than a first threshold. The value of the accelerator pedal information decreases from a first value to a second value in the first time period, and the second rate of decrease is less than the first rate of decrease.

9. An electronic device, characterized in that, include: The processor is used to obtain vehicle driving information when the vehicle is in automatic drive switching mode; The vehicle's driving status is determined based on at least the driving information, and the accelerator pedal information is monitored based on the vehicle's driving status. If it is determined that the change in the accelerator pedal information in the first time period is greater than the first threshold, the rate of decrease of the forward output torque of the vehicle's transfer case is adjusted from the first rate of decrease to the second rate of decrease, wherein the value of the accelerator pedal information decreases from the first value to the second value in the first time period, and the second rate of decrease is less than the first rate of decrease. The memory is used to store the program used by the processor to execute the above-described processing procedure.

10. A vehicle, characterized in that, include: A control device for performing the vehicle control method as described in any one of claims 1-7.

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