Vehicle drive control method, device, equipment and storage medium

Abstract

The present application discloses a vehicle drive control method, device, equipment and storage medium, wherein the applicable vehicle comprises a first drive module and a second drive module, wherein the first drive module is used to provide a first drive function and a vehicle accessory power supply function based on an engine, a generator and a first drive shaft, and the second drive module is used to provide a second drive function based on a drive motor and a second drive shaft. When responding to a creeping instruction initiated for the vehicle, the method in the present application will determine whether the driving performance of the second drive module is normal, and when the driving performance of the second drive module is normal, control the first drive function of the first drive module to be in an off state and the second drive function of the second drive module to be in an on state, so as to use the second drive module to drive the vehicle in creeping mode, decouple the operation of the engine from the creeping mode, and improve the stable passability of the vehicle under complex road conditions.

Description

Technical Field

[0001] The present application relates to the fields of hybrid vehicle control technology and computer technology, and in particular to a vehicle drive control method, device, equipment and storage medium. Background Art

[0002] With the development of hybrid vehicle control technology, hybrid vehicles with various drive structures (such as front-wheel drive, rear-wheel drive, and four-wheel drive) are now available on the market. Although they can easily meet the power needs of drivers and passengers, they have problems such as large speed fluctuations or high speeds when passing through complex road conditions (such as steep slopes, rainy and snowy roads, rocky roads, etc.), resulting in the vehicle's stability when passing through complex road conditions cannot be guaranteed. In view of this, it is urgent to propose a drive control solution to improve the vehicle's stable passability under complex road conditions. Summary of the invention

[0003] The embodiments of the present application provide a vehicle drive control method, device, equipment and storage medium, which can improve the stable passability of the vehicle under complex road conditions.

[0004] On the one hand, an embodiment of the present application provides a vehicle drive control method, wherein the target vehicle to which the method is applied comprises a first drive module and a second drive module, wherein the first drive module comprises an engine, a generator and a first drive shaft, and the second drive module comprises a drive motor and a second drive shaft, and the first drive module is used to provide a first drive function and a vehicle accessory power supply function, and the second drive module is used to provide a second drive function; the method specifically comprises:

[0005] determining whether the driving performance of the second driving module is normal in response to a creeping instruction for the target vehicle, the creeping instruction being used to enable a creeping mode of the target vehicle;

[0006] When the driving performance of the second driving module is normal, the first driving function of the first driving module is controlled to be in an off state, and the second driving function of the second driving module is controlled to be in an on state, so that the second driving module is used to drive the target vehicle to travel in the creeping mode.

[0007] On the other hand, the embodiment of the present application provides a vehicle drive control device, the target vehicle to which the device is applicable comprises a first drive module and a second drive module, the first drive module comprises an engine, a generator and a first drive shaft, the second drive module comprises a drive motor and a second drive shaft, and the first drive module is used to provide a first drive function and a vehicle accessory power supply function, and the second drive module is used to provide a second drive function; the device comprises:

[0008] a performance determination unit, configured to determine whether the driving performance of the second driving module is normal in response to a creeping instruction for the target vehicle, the creeping instruction being configured to enable a creeping mode of the target vehicle;

[0009] A drive control unit is used to control the first drive function of the first drive module to be in an off state and control the second drive function of the second drive module to be in an on state when the driving performance of the second drive module is normal, so as to use the second drive module to drive the target vehicle in the creep mode.

[0010] On the other hand, an embodiment of the present application provides a drive control device, including:

[0011] a processor adapted to implement one or more computer programs;

[0012] A storage medium storing one or more computer programs, wherein the one or more computer programs are suitable for being loaded by the processor and executing the method according to the first aspect.

[0013] On the other hand, an embodiment of the present application provides a storage medium, wherein the storage medium stores one or more computer programs, and the one or more computer programs are suitable for being loaded by a processor and executing the method of the first aspect.

[0014] The embodiment of the present application enables only the second driving function corresponding to the second driving module to drive the vehicle when it is detected that the target vehicle has a creeping demand and the performance of the driving module that does not include an engine (i.e., the second driving module) in the vehicle is normal. This makes the driving force of the target vehicle almost unaffected by the engine speed in the first driving module, thereby reducing or even avoiding vehicle speed fluctuations caused by changes in the engine speed, and ultimately enables the target vehicle in creeping mode to reach a stable speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of a four-drive power system provided in an embodiment of the present application;

[0017] Figure 2 is a schematic flow chart of a vehicle driving control method provided in an embodiment of the present application;

[0018] Figure 3is a schematic flow chart of another vehicle driving control method provided in an embodiment of the present application;

[0019] Figure 4 is a schematic diagram of a driving structure of a target vehicle provided in an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of a drive control application process provided by an embodiment of the present application;

[0021] Figure 6 is a structural schematic diagram of a vehicle drive control device provided in an embodiment of the present application;

[0022] Figure 7 It is a structural schematic diagram of a drive control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] It should be noted in advance that in order to enable people in the technical field to better understand the technical solutions proposed in the embodiments of the present application, the embodiments of the present application will be combined with one or more drawings to clearly and completely describe the implementation of the technical solutions proposed in the embodiments of the present application. In addition, the various drawings shown in the embodiments of the present application are only exemplary descriptions. For example, the execution order of each step in the drawings can be adaptively adjusted according to the actual application scenario.

[0024] In addition, in the embodiments of the present application, the block diagrams, modules and units shown in the drawings are merely functional entities and do not necessarily correspond to physically independent entities, and each module or unit may be part of an overall module or unit that includes the functions of the module or unit.

[0025] That is, the term "module" or "unit" mentioned in the embodiments of the present application refers to a computer program or a part of a computer program with a predetermined function, which can work together with other related parts to achieve a predetermined goal, and can also be implemented in whole or in part by using software, hardware (such as processing circuits or memories) or a combination thereof, or implemented in different networks and / or processor devices and / or microcontroller devices. Similarly, a processor (or multiple processors or memories) can be used to implement one or more modules or units.

[0026] The embodiment of the present application mainly proposes a technical solution for driving and controlling a vehicle, and the power system in the target vehicle to which the solution is applicable mainly includes a first drive module and a second drive module. Among them, the first drive module mainly includes an engine, a generator and a first drive shaft, and the second drive module mainly includes a drive motor and a second drive shaft. Optionally, the first drive shaft may specifically refer to the front axle or rear axle in the vehicle, and the second drive shaft may correspond to the rear axle or front axle in the vehicle, and a certain drive shaft is not limited to the front axle or rear axle here. In addition, the first drive module is mainly used to provide a first drive function and a vehicle accessory power supply function, and the second drive module is mainly used to provide a second drive function. It can be understood that the first drive function and the second drive function are used to control different drive shafts to drive the vehicle.

[0027] For the target vehicle of the above configuration, the embodiment of the present application enables the drive control device to determine whether the driving performance of the second drive module is normal when receiving a creeping instruction for the target vehicle, and when the driving performance of the second drive module is normal, only the second drive module of the first drive module and the second drive module is enabled, so that the target vehicle creeps under the drive of the second drive module. Among them, creeping is a vehicle driving mode, which is specifically a low-speed starting condition when the vehicle accelerator pedal is not stepped on, aiming to enable the vehicle to move at a slow and stable speed. As an example, the speed that the vehicle needs to maintain when creeping can be in the range of 5 to 7 (unit km / h).

[0028] It can be understood that when the engine in the target vehicle is not only used to realize the first driving function, but also used to power the vehicle accessories (i.e., to realize the vehicle accessories power supply function), the engine speed is closely related to the power consumption demand of the vehicle accessories. Therefore, when the first driving module is used to provide the first driving function for the target vehicle, the change in the engine speed will affect the vehicle speed corresponding to the first driving function, thereby causing speed fluctuations. The technical solution proposed in the present application is to enable only the second driving function corresponding to the second driving module to drive the vehicle when it is detected that the vehicle has a creeping demand and the performance of the driving module (i.e., the second driving module) that does not contain the engine in the vehicle is normal, so that the driving force of the target vehicle is almost not affected by the engine speed in the first driving module, and the speed fluctuation caused by the engine speed change can be reduced or even avoided, and finally the target vehicle in the creeping mode reaches a stable speed.

[0029] In one implementation, the target vehicle to which the embodiment of the present application is applicable may be a four-wheel drive hybrid vehicle, and the structure of the four-wheel drive power system included therein may be exemplarily referred to in Figure 1 , Figure 1 The double-headed arrow connecting line in the figure indicates that there is a signal connection between the corresponding components. Figure 1As shown, the four-drive power system includes at least a first drive module marked by 101 and a second drive module marked by 102, and there is a signal connection between the first drive module and the second drive module and a drive control device marked by 103 for responding to the drive control instructions of the drive control device.

[0030] Among them, the drive control device can be a control module equipped inside the target vehicle (such as a vehicle controller, a vehicle computer), or it can be a terminal device connected to the outside of the target vehicle. The terminal device can specifically include but is not limited to: smart phones, tablet computers, laptops, smart wearable devices (such as smart bracelets, smart watches) and game consoles. The first drive module may include a generator, an engine, a gearbox and a first drive shaft. The gearbox is used to change the speed ratio between the engine and the first drive shaft, thereby changing the speed ratio between the engine and the wheel end. The generator can be connected to the power battery of the target vehicle to charge the power battery when necessary. The power battery is mainly used to provide power to the drive motor in the second drive module. The second drive module mainly includes the drive motor and the second drive shaft.

[0031] It is understandable that the embodiments of the present application are Figure 1 The structure shown is only an exemplary description and does not represent a limitation on the placement of each component and the signal connection method.

[0032] Based on the above technical solution and target vehicle, the embodiment of the present application specifically proposes a vehicle driving control method, and the schematic flow chart of the method can be found in Figure 2 , and the method can be executed by the aforementioned drive control device. Specifically, Figure 2 As shown, the method mainly includes steps S201-S202:

[0033] S201, in response to a creeping instruction for a target vehicle, determining whether the driving performance of the second driving module is normal, the creeping instruction is used to enable the creeping mode of the target vehicle. The target vehicle includes a first driving module and a second driving module, the first driving module includes an engine, a generator and a first driving shaft, the second driving module includes a driving motor and a second driving shaft, and the first driving module is used to provide a first driving function and a vehicle accessory power supply function, and the second driving module is used to provide a second driving function.

[0034] In a specific embodiment, the target vehicle refers to a car having a front driving force structure and a rear driving force structure and adopting a hybrid power system. The target vehicle (hereinafter referred to as the vehicle) in the embodiment of the present application mainly includes a first drive module and a second drive module, and the first drive module includes an engine, a generator and a first drive shaft, and the second drive module includes a drive motor and a second drive shaft.

[0035] Among them, the second drive module is used to provide the second drive function, and the first drive module is used to provide the first drive function and the vehicle accessory power supply function. The vehicle accessory power supply function refers to: providing electrical energy to one or more vehicle accessories in the vehicle for the normal operation of each vehicle accessory. The vehicle accessories mentioned here may refer to automotive modules that require electricity other than the vehicle's drive module, such as air-conditioning modules, vehicle machine modules, battery modules (low-voltage batteries, such as 12V batteries) and power battery modules (high-voltage batteries, such as 350V batteries), etc.

[0036] In one embodiment, the creeping instruction may be triggered by the vehicle's driver and passenger through human-computer interaction with the drive control device, or may be automatically generated by the vehicle itself when it detects that the road condition it is traveling on is a preset complex road condition, which is not limited here. As an example, the vehicle may determine whether it is in a complex road condition by detecting the bumpiness and friction of the wheel end.

[0037] By detecting complex road conditions and automatically triggering creep commands, the vehicle can automatically enable driving assistance under complex road conditions, allowing drivers and passengers to focus on their own control of the vehicle when facing complex road conditions, thereby effectively reducing traffic accidents on complex roads.

[0038] S202, when the driving performance of the second driving module is normal, controlling the first driving function of the first driving module to be in an off state, and controlling the second driving function of the second driving module to be in an on state, so as to use the second driving module to drive the target vehicle to travel in a creeping mode.

[0039] In a specific embodiment, the driving performance of the second driving module is normal, which may mean that each driving component included in the second driving module is not damaged, or that the health level of each driving component included in the second driving module meets the preset health level, which is not limited here.

[0040] It can be understood that by judging the driving performance of the second drive module based on the health of each component, when the drive control device determines that the performance of the second drive module is normal, the second drive module actually has better working performance, thereby effectively avoiding driving failures in the process of using the second drive module to drive the vehicle, improving the driving experience of the driver and passengers, and improving travel efficiency to a certain extent.

[0041] In addition, it should be noted that controlling the first driving function of the first driving module to be in an off state means prohibiting the use of the engine to drive the first driving shaft to provide driving force for the vehicle, which will not affect the vehicle accessory power supply function of the first driving module.

[0042] The embodiment of the present application enables only the second driving function corresponding to the second driving module to drive the vehicle when it is detected that the target vehicle has a creeping demand and the performance of the driving module that does not include an engine (i.e., the second driving module) in the vehicle is normal, so that the driving force of the vehicle is almost unaffected by the engine speed in the first driving module, thereby reducing or even avoiding the vehicle speed fluctuation caused by the engine speed change, and ultimately allowing the target vehicle in the creeping mode to reach a stable speed.

[0043] Based on the aforementioned Figure 2 The present application also proposes another vehicle driving control method. The schematic flow chart of the method can be found in Figure 3 , and the method can still be executed by the aforementioned drive control device. Specifically, Figure 3 As shown, the method mainly includes steps S301-S304:

[0044] S301 . In response to a creep instruction for a target vehicle, determine whether the driving performance of a second driving module is normal, wherein the creep instruction is used to enable a creep mode of the target vehicle.

[0045] In a specific embodiment, the target vehicle mentioned in step S301 is a vehicle with the same power structure as the target vehicle in the aforementioned step S201, and the specific implementation method of step S301 can refer to the relevant embodiment in step S301, which will not be repeated here.

[0046] S302, when the driving performance of the second driving module is normal, controlling the first driving function of the first driving module to be in an off state, and controlling the second driving function of the second driving module to be in an on state, so as to use the second driving module to drive the target vehicle to travel in a creeping mode.

[0047] In one embodiment, the specific implementation of step S302 can refer to the relevant embodiment of the aforementioned step S202, which will not be described in detail here.

[0048] S303: When the driving performance of the second driving module is abnormal, obtaining an idle speed threshold and an idle power generation threshold of the engine.

[0049] In a specific embodiment, the idle speed threshold of the engine refers to: the speed threshold of the engine when the vehicle is idling. The idle power generation threshold refers to: the power threshold used when the engine is running when the vehicle is idling.

[0050] In one implementation, the idle power generation threshold can be determined based on the total power consumption of the vehicle accessories, and as an example, the idle power generation threshold can be selected from the values ​​indicated by the various power generation powers that can ensure stable operation of the vehicle's temperature control (such as cooling and heating of the air-conditioning module) and are not less than the total power consumption.

[0051] In one implementation, the idle speed threshold may be determined based on a target creep speed and an idle power generation threshold. The target creep speed refers to the speed that the target vehicle is expected to maintain in the creep mode, which is usually preset. In this case, as an example, the drive control device may include the following steps (1)-(2) when determining the idle speed threshold:

[0052] (1) After the target creeping speed is obtained, the engine speed range used when the vehicle reaches a speed close to the target creeping speed in the first gear driving mode is determined.

[0053] The first gear driving mode means that the vehicle's driving gear is the first gear, and the gear-related driving modes (such as the first gear driving mode, the second gear driving mode, the reverse gear driving mode, etc.) and the creeping mode can be enabled at the same time. In addition, the vehicle speed close to the target creeping speed is referred to as the reference creeping speed in the embodiment of the present application, and the difference between the reference creeping speed and the target creeping speed is within a preset difference range.

[0054] (2) Under the constraints that the actual power generation of the generator is less than or equal to the idle power generation threshold and the speed stability of the engine is greater than or equal to the stability threshold, the idle speed threshold is determined from various speeds included in the engine speed range.

[0055] The speed stability can be determined based on the fluctuation frequency and / or fluctuation amplitude of the actual speed of the engine within a period of time. The stability of the engine speed is conducive to the stability of the wheel end speed, so that the vehicle can maintain a stable speed for driving. In other words, the idle speed threshold determined by the embodiment of the present application can enable the engine to reach a relatively stable speed when the actual power generation is less than the idle power generation threshold, so that when the first drive module is used to drive the vehicle, the vehicle can maintain a relatively stable speed.

[0056] S304, control the first driving function of the first driving module to be in an on state, and use the first driving module to drive the target vehicle in a creeping mode under the constraints of an idle speed threshold, an idle power generation threshold and a preset driving gear, wherein the preset driving gear includes a first gear or a reverse gear.

[0057] In a specific embodiment, the preset drive gear may be first gear or reverse gear. By limiting the vehicle to travel in first gear or reverse gear, excessive speed can be avoided, allowing the vehicle to crawl at a slower speed, effectively reducing wheel slippage when facing complex road conditions, and ensuring the stability of the vehicle when passing through complex road conditions.

[0058] In addition, it should be noted that, in one embodiment, the drive control device can also detect the throttle opening and actual vehicle speed of the target vehicle during the creeping process of the target vehicle, and control the vehicle to exit the creeping mode when the throttle opening is greater than the throttle opening threshold or the actual vehicle speed is greater than the vehicle speed threshold, so that the driver can quickly restore the vehicle to normal driving mode by stepping on the accelerator, provide vehicle power in time, and give full play to the power of the vehicle equipped with a four-wheel drive system.

[0059] The vehicle speed threshold may be the vehicle speed reached when the vehicle uses the maximum idle speed in the idle speed range in the second gear drive mode after the idle speed range of the engine is obtained. When determining the throttle opening threshold, the minimum throttle opening required when the vehicle reaches the aforementioned vehicle speed threshold in the first gear drive mode or the reverse gear drive mode may be first obtained, and then the throttle opening threshold may be determined based on the preset deviation and the minimum throttle opening, so that the throttle opening threshold is greater than or equal to the minimum throttle opening, and the difference between the throttle opening threshold and the minimum throttle opening is less than or equal to the preset deviation.

[0060] By limiting the throttle opening threshold to a preset deviation greater than the aforementioned minimum throttle opening, it is possible to ensure that the vehicle speed reaches the aforementioned vehicle speed threshold when the driver steps on the throttle opening, thereby avoiding the driver being unable to enter the parallel drive control mode by stepping on the accelerator due to the throttle opening threshold being too large, so that each drive control mode in the vehicle can be used normally. It is understood that in other implementations, the throttle opening threshold can also be set based on historical experience. As an example, the throttle opening threshold can be set to 10%.

[0061] After the vehicle exits the creep mode, the drive control device can predict the current drive demand based on the vehicle's driving control parameters during the vehicle's driving process, and the drive demand is used to indicate at least one of the required torque or required vehicle speed, and then respectively detect the current drive performance of the first drive module and the second drive module to control the switch state of the first drive function and the second drive function according to the drive demand and the current drive performance of each drive module. For example, when the required torque or required vehicle speed indicated by the drive demand is large, the first drive function and the second drive function can be turned on at the same time to provide a large driving force.

[0062] In actual applications, the vehicle can also determine its driving condition based on other working condition evaluation dimensions, and then schedule the first driving function and the second driving function based on the driving condition. As an example, other working condition evaluation dimensions can be the vehicle's driving direction (such as forward, backward, left turn, right turn, etc.) or purpose (such as parking, starting, overtaking), which is not limited here.

[0063] The embodiment of the present application adopts the second drive module to drive in the creeping mode, which can decouple the engine speed from the vehicle speed, so that the creeping speed is not affected when the engine speed fluctuates, so that the vehicle can obtain a stable creeping speed, which is conducive to passing through complex road conditions safely and efficiently. In addition, in the non-creeping mode, the first drive module and the second drive module can be flexibly deployed based on actual driving needs to improve the dynamic performance of the vehicle. When the performance of the second drive module is abnormal, by limiting the operating power and speed of the engine to lower values, and prohibiting creeping through the second gear drive mode, the speed of the vehicle during creeping can be as close to the desired creeping speed (usually lower) as possible. In summary, it can be seen that the use of the embodiment of the present application to drive and control the target vehicle can maintain the dynamic performance of the target vehicle and enable it to have the ability to stably pass through complex road conditions.

[0064] In order to facilitate the rapid application of the various technical solutions provided in the embodiments of the present application, an application process of the embodiments of the present application is described in detail below with reference to specific examples and drawings. In this example, the first drive shaft is the front shaft, the second drive shaft is the rear shaft, and the drive structure of the target vehicle is as follows: Figure 4 shown.

[0065] It can be seen that in Figure 4 In the system, the first drive module (i.e., the front drive module) mainly includes the engine, P1 motor and 8AT gearbox, and the second drive module (i.e., the rear drive module) mainly includes the P4 motor. There are signal connections between the drive control device and the first drive module and the second drive module. Figure 4 The specific drive control modes that can be realized for the target vehicle with a drive structure generally include series mode, parallel mode and pure electric mode. As an example, in pure electric mode and series mode, the rear axle is usually used to drive the vehicle (i.e., rear-wheel drive mode), while in parallel mode, the front axle can be used to drive the vehicle (i.e., front-wheel drive mode) or dual-axle drive can be used (i.e., four-wheel drive mode) according to actual driving needs.

[0066] The following is based on the above description and combined with Figure 5 The drive control application process shown in FIG. Figure 5The drive control device can determine whether the performance of the rear drive module is normal by detecting whether the rear drive motor is faulty during vehicle driving, and when the rear drive motor fails, prohibit the vehicle from being driven in the rear drive mode and allow the vehicle to be driven in the front drive mode.

[0067] That is to say, in response to the creeping instruction, the drive control device realizes the vehicle creeping by adopting the front drive mode. As an example, in the creeping mode, the engine idle speed can be limited to less than a certain threshold (such as the aforementioned idle speed threshold), and the engine power generation can be limited to less than a certain threshold (such as the aforementioned engine power generation threshold). In addition, because at the same engine speed, the corresponding vehicle speed in the second gear drive mode after the vehicle is acted upon by the 8AT gearbox is relatively high (usually higher than the expected creeping speed), which is not conducive to stable passage through snowy sections, muddy sections, gravel roads and grass-covered sections, therefore, the drive control device can further limit the gear position of the vehicle when creeping to the first gear or R gear (i.e., prohibiting the vehicle from creeping in the second gear drive mode).

[0068] Among them, when selecting the threshold corresponding to the engine power generation, the threshold should be greater than or equal to the power consumed by the vehicle accessories, and it is necessary to ensure that the vehicle still has a certain heating and cooling capacity under the constraint of the threshold. In addition, when selecting the threshold corresponding to the engine idle speed, on the one hand, it should be ensured that the vehicle speed reached when the vehicle adopts the first gear driving mode under the constraint of the threshold can be close to the target creeping speed (such as 6km / h), and on the other hand, it is also necessary to ensure that the actual power generation can be less than or equal to the threshold corresponding to the power generation when the engine speed is the threshold, and the engine speed can remain stable.

[0069] When the rear drive motor is not faulty, check whether the vehicle meets one of the following two conditions:

[0070] ① The vehicle speed is less than the vehicle speed threshold, and the throttle opening is less than the throttle opening threshold.

[0071] ②8AT transmission failure.

[0072] Among them, the speed threshold should be selected as the vehicle speed in the second gear drive mode corresponding to the highest idle speed in the engine idle speed range (e.g., if the highest idle speed of the engine is 1500rpm, the corresponding vehicle speed in the second gear drive mode is 20km / h, then the speed threshold can be set to 20km / h) to ensure that the vehicle is in a creeping state in the rear drive mode when its engine speed is in the idle speed range. In addition, the throttle opening threshold should be selected to ensure that when the driver steps on the throttle opening, the vehicle speed can reach the speed threshold, and the throttle opening threshold should not be too large to avoid the driver being unable to enter parallel when stepping on the throttle.

[0073] If the above ① or ② is met, the vehicle is prohibited from being driven in front-wheel drive mode, but is allowed to be driven in rear-wheel drive mode, so that the vehicle can creep at a slower and more stable speed, and when the 8AT gearbox fails, the rear-wheel drive mode can ensure the vehicle's driving function.

[0074] If the above ① and ② are not met, the front-wheel drive mode, rear-wheel drive mode and four-wheel drive mode can be selected according to the actual working conditions of the vehicle. For example, when the driver steps on the accelerator (the accelerator opening is greater than a certain threshold), the vehicle is controlled to use the four-wheel drive mode at all speeds to give full play to the power of the four-wheel drive vehicle.

[0075] This application process can solve the problem of excessive speed and speed fluctuation of the target vehicle equipped with AT (such as the aforementioned 8AT) during creeping, and can realize four-wheel drive in the full speed range when the driver steps on the accelerator, thereby giving full play to the power of the target vehicle equipped with AT.

[0076] Based on the above Figure 2 and Figure 3 The method shown in the embodiment of the present application also proposes a vehicle drive control device, the target vehicle applicable to the device includes a first drive module and a second drive module, the first drive module includes an engine, a generator and a first drive shaft, the second drive module includes a drive motor and a second drive shaft, and the first drive module is used to provide a first drive function and a vehicle accessory power supply function, and the second drive module is used to provide a second drive function. In addition, the device can be a computer program (including program code) running in the above-mentioned drive control device, and can implement Figure 2 or Figure 3 Specifically, see Figure 6 , the device may at least include a performance determination unit 601 and a drive control unit 602, wherein:

[0077] a performance determination unit, configured to determine whether the driving performance of the second driving module is normal in response to a creeping instruction for the target vehicle, the creeping instruction being configured to enable a creeping mode of the target vehicle;

[0078] A drive control unit is used to control the first drive function of the first drive module to be in an off state and control the second drive function of the second drive module to be in an on state when the driving performance of the second drive module is normal, so as to use the second drive module to drive the target vehicle in the creep mode.

[0079] In one implementation, the drive control unit 602 may also be configured to execute:

[0080] During the driving process of the target vehicle in the creeping mode, detecting the throttle opening and the actual vehicle speed of the target vehicle;

[0081] If the throttle opening is greater than the throttle opening threshold or the actual vehicle speed is greater than the vehicle speed threshold, the target vehicle is controlled to exit the creep mode.

[0082] In yet another implementation, when used to determine the vehicle speed threshold, the driving control unit 602 may specifically perform:

[0083] Obtaining a maximum idle speed in an idle speed interval of the engine, wherein the idle speed interval is preconfigured;

[0084] In the second gear driving mode of the target vehicle, the vehicle speed reached by the target vehicle when the maximum idle speed is adopted is determined, and the determined vehicle speed is used as the vehicle speed threshold.

[0085] In yet another embodiment, when the driving control unit 602 is used to determine the throttle opening threshold, it may specifically perform:

[0086] Obtaining a minimum throttle opening required when the target vehicle reaches the vehicle speed threshold in a first gear driving mode or a reverse gear driving mode;

[0087] Determining the throttle opening threshold based on a preset deviation and the minimum throttle opening;

[0088] The throttle opening threshold is greater than or equal to the minimum throttle opening, and a difference between the throttle opening threshold and the minimum throttle opening is less than or equal to the preset deviation.

[0089] In yet another embodiment, after the target vehicle exits the creeping mode, the driving control unit 602 may also be configured to execute:

[0090] During the driving process of the target vehicle, predicting a current driving demand based on a driving control parameter of the target vehicle, the driving demand being used to indicate at least one of a required torque or a required vehicle speed;

[0091] The current driving performance of the first driving module and the second driving module are detected respectively, and the switching states of the first driving function and the second driving function are controlled according to the driving requirement and the current driving performance of each driving module.

[0092] In yet another embodiment, the driving control unit 602 may also be configured to execute:

[0093] When the driving performance of the second driving module is abnormal, obtaining an idle speed threshold and an idle power generation threshold of the engine;

[0094] The first driving function of the first driving module is controlled to be in an on state, and under the constraints of the idle speed threshold, the idle power generation threshold and a preset driving gear, the first driving module is used to drive the target vehicle to travel in the creeping mode, and the preset driving gear includes a first gear or a reverse gear.

[0095] In yet another embodiment, when the driving control unit 602 is used to determine the idle speed threshold, it can be used to execute:

[0096] Obtaining a target creeping speed of the target vehicle;

[0097] Determining an engine speed range used when the target vehicle reaches a reference creep speed in a first gear driving mode, wherein a difference between the reference creep speed and the target creep speed is within a preset difference range;

[0098] Under the constraints that the actual power generation of the generator is less than or equal to the idle power generation threshold and the speed stability of the engine is greater than or equal to the stability threshold, the idle speed threshold is determined from various speeds included in the engine speed range.

[0099] It is necessary to add that Figure 6 The various units in the vehicle drive control device shown are divided based on logical functions, and the above-mentioned various units can be respectively or completely merged into one or several other units to constitute, or one (some) of the units can also be split into multiple smaller units in function to constitute, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application. In other embodiments of the present application, the above-mentioned vehicle drive control device may also include other units, and in practical applications, these functions can also be implemented with the assistance of other units, and can be implemented by the collaboration of multiple units.

[0100] Based on the above description of the vehicle drive control method and the vehicle drive control device, the present application embodiment further provides a drive control device, see Figure 7. The drive control device at least includes a processor 701 and a storage medium 702, and the processor 701 and the storage medium 702 of the drive control device can be connected via a bus or other means. Among them, the storage medium can be a high-speed RAM memory, or it can be a non-volatile memory (non-volatile memory), such as at least one disk storage; optionally, it can also be at least one storage medium located away from the aforementioned processor. The processor 701 (or CPU (Central Processing Unit)) is the computing core and control core of the drive control device, which is suitable for implementing one or more computer programs, and is specifically suitable for loading and executing one or more computer programs to realize the corresponding method flow or corresponding function.

[0101] Specifically, the storage medium 702 mentioned above is a memory device in the drive control device, which is used to store programs and data. It is understandable that the storage medium 702 here can include both the built-in storage medium in the drive control device and the extended storage medium supported by the drive control device. The storage medium 702 provides a storage space, which stores the operating system of the drive control device. In addition, one or more computer programs suitable for being loaded and executed by the processor 701 are also stored in the storage space. These computer programs can be one or more program codes. It should be noted that, optionally, the drive control device can also have a communication connection with one or more target output devices 703 (such as a server, a mobile terminal device, an information broadcasting device, etc.) to achieve drive control of the vehicle by interacting with the target output device 703.

[0102] The embodiment of the present application further provides a storage medium, in which one or more computer programs corresponding to the above-mentioned vehicle drive control method are stored. When one or more processors load and execute the one or more computer programs, the description of the vehicle drive control method in the embodiment can be implemented, which will not be repeated here. The computer program can also be deployed on one or more devices that can communicate with each other for execution.

[0103] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiment method can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a storage medium. When the computer program is executed, it can include the process of the embodiment of the above-mentioned vehicle drive control method. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0104] It can be understood that the beneficial effects of the same method in the vehicle drive control device, the drive control device and the storage medium in the present application are the same as those in the Figure 2 or Figure 3 The beneficial effects of the proposed vehicle driving control method are the same, so they will not be described here in detail. In addition, the various embodiments disclosed above are only partial embodiments of the present application, and certainly cannot be used to limit the scope of the present application. A person of ordinary skill in the art can understand that the implementation of all or part of the above-mentioned embodiments and the equivalent changes made according to the claims of the present application still fall within the scope of the present invention.

Claims

1. A vehicle driving control method, characterized in that: The applicable target vehicle comprises a first drive module and a second drive module, wherein the first drive module comprises an engine, a generator and a first drive shaft, and the second drive module comprises a drive motor and a second drive shaft, and the first drive module is used to provide a first drive function and a vehicle accessory power supply function, and the second drive module is used to provide a second drive function; the method comprises: determining whether the driving performance of the second driving module is normal in response to a creeping instruction for the target vehicle, the creeping instruction being used to enable a creeping mode of the target vehicle; When the driving performance of the second driving module is normal, controlling the first driving function of the first driving module to be in an off state, and controlling the second driving function of the second driving module to be in an on state, so as to use the second driving module to drive the target vehicle to travel in the creeping mode; When the driving performance of the second driving module is abnormal, obtaining an idle speed threshold and an idle power generation threshold of the engine; The first driving function of the first driving module is controlled to be in an on state, and under the constraints of the idle speed threshold, the idle power generation threshold and a preset driving gear, the first driving module is used to drive the target vehicle to travel in the creeping mode, and the preset driving gear includes a first gear or a reverse gear.

2. The method according to claim 1, characterized in that The method further comprises: During the driving process of the target vehicle in the creeping mode, detecting the throttle opening and the actual vehicle speed of the target vehicle; If the throttle opening is greater than the throttle opening threshold or the actual vehicle speed is greater than the vehicle speed threshold, the target vehicle is controlled to exit the creep mode.

3. The method according to claim 2, characterized in that The method for determining the vehicle speed threshold includes: Obtaining a maximum idle speed in an idle speed interval of the engine, wherein the idle speed interval is preconfigured; In the second gear driving mode of the target vehicle, the vehicle speed reached by the target vehicle when the maximum idle speed is adopted is determined, and the determined vehicle speed is used as the vehicle speed threshold.

4. The method according to claim 2 or 3, characterized in that: The method for determining the throttle opening threshold includes: Obtaining a minimum throttle opening required when the target vehicle reaches the vehicle speed threshold in a first gear driving mode or a reverse gear driving mode; Determining the throttle opening threshold based on a preset deviation and the minimum throttle opening; The throttle opening threshold is greater than or equal to the minimum throttle opening, and a difference between the throttle opening threshold and the minimum throttle opening is less than or equal to the preset deviation.

5. The method according to any one of claims 1 to 3, characterized in that: When the target vehicle exits the creeping mode, the method further includes: During the driving process of the target vehicle, predicting a current driving demand based on a driving control parameter of the target vehicle, the driving demand being used to indicate at least one of a required torque or a required vehicle speed; The current driving performance of the first driving module and the second driving module are detected respectively, and the switching states of the first driving function and the second driving function are controlled according to the driving requirement and the current driving performance of each driving module.

6. The method according to claim 1, characterized in that The method for determining the idle speed threshold includes: Obtaining a target creeping speed of the target vehicle; Determining an engine speed range used when the target vehicle reaches a reference creep speed in a first gear driving mode, wherein a difference between the reference creep speed and the target creep speed is within a preset difference range; Under the constraints that the actual power generation of the generator is less than or equal to the idle power generation threshold and the speed stability of the engine is greater than or equal to the stability threshold, the idle speed threshold is determined from various speeds included in the engine speed range.

7. A vehicle driving control device, characterized in that: The applicable target vehicle comprises a first drive module and a second drive module, wherein the first drive module comprises an engine, a generator and a first drive shaft, and the second drive module comprises a drive motor and a second drive shaft, and the first drive module is used to provide a first drive function and a vehicle accessory power supply function, and the second drive module is used to provide a second drive function; the device comprises: a performance determination unit, configured to determine whether the driving performance of the second driving module is normal in response to a creeping instruction for the target vehicle, the creeping instruction being configured to enable a creeping mode of the target vehicle; A drive control unit is used to control the first drive function of the first drive module to be in an off state when the driving performance of the second drive module is normal, and control the second drive function of the second drive module to be in an on state, so as to adopt the second drive module to drive the target vehicle to travel in the creeping mode; when the driving performance of the second drive module is abnormal, obtain the idle speed threshold and idle power generation threshold of the engine; control the first drive function of the first drive module to be in an on state, and adopt the first drive module to drive the target vehicle to travel in the creeping mode under the constraints of the idle speed threshold, the idle power generation threshold and a preset drive gear, and the preset drive gear includes a first gear or a reverse gear.

8. A drive control device, characterized in that: include: a processor adapted to implement one or more computer programs; A storage medium storing one or more computer programs, wherein the one or more computer programs are suitable for being loaded by the processor and executing the vehicle drive control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores one or more computer programs, and the one or more computer programs are suitable for being loaded by a processor and executing the vehicle driving control method according to any one of claims 1 to 6.

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