Slope vehicle control method, device, equipment and storage medium

Abstract

The present invention belongs to the technical field of electric energy management, and discloses a method, device, equipment and storage medium for controlling a vehicle on a slope. The method comprises: detecting the driving condition of the current vehicle; when the driving condition of the current vehicle is a climbing condition, obtaining the battery SOC and wheel-end power demand of the current vehicle; determining the engine power according to the battery SOC and wheel-end power demand; determining the engine speed according to the engine power, and controlling the vehicle according to the engine power and engine speed. This solution detects the driving condition of the vehicle, controls the engine power and engine speed according to the current battery SOC and the wheel-end torque demand when the vehicle is climbing, and improves the adaptability of the vehicle to climbing scenarios.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy management, and in particular to a ramp vehicle control method, device, equipment and storage medium. Background Art

[0002] With the continuous development of the new energy vehicle industry, hybrid vehicle NVH control technology has become a research hotspot for major automobile companies.

[0003] The current hybrid vehicle extended-range charging strategy in the industry mainly selects the corresponding extended-range charging MAP based on the vehicle SOC value. The extended-range charging MAP refers to a three-dimensional relationship chart of the vehicle's wheel-end required power, vehicle speed and actual requested power generation. The actual requested power generation divided by the power generation efficiency gives the engine power. There is a corresponding relationship between engine power and engine speed. However, if the same strategy is used when climbing a slope as in normal conditions, it will cause problems such as insufficient power or excessive noise.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a slope vehicle control method, device, equipment and storage medium, aiming to solve the technical problem that the prior art vehicles cannot adapt to the climbing scene.

[0006] To achieve the above object, the present invention provides a method for controlling a vehicle on a slope, the method comprising the following steps:

[0007] Detect the current driving condition of the vehicle;

[0008] When the current driving condition of the vehicle is a climbing condition, obtaining the battery SOC and wheel-end required power of the current vehicle;

[0009] Determining the engine power according to the battery SOC and the wheel-end required power;

[0010] An engine speed is determined according to the engine power, and engine power generation is controlled according to the engine power and the engine speed.

[0011] Optionally, determining the engine speed according to the engine power includes:

[0012] Obtain the engine speed required for thermal management in hill climbing conditions;

[0013] The minimum engine speed that meets the thermal management requirement and the fuel consumption requirement is determined according to the engine power, the thermal management required engine speed and a preset engine universal characteristic curve.

[0014] Optionally, the detecting the current driving condition of the vehicle includes:

[0015] Obtain the current vehicle's battery SOC, wheel-end required power, and engine water temperature;

[0016] When the battery SOC is less than a preset SOC threshold, the wheel-end demand power is greater than a preset wheel-end power, and the engine water temperature is greater than a preset water temperature, it is determined that the current vehicle driving condition is a climbing condition.

[0017] Optionally, before determining that the current driving condition of the vehicle is a climbing condition, the method further includes:

[0018] Get the current vehicle's wheel speed;

[0019] The preset wheel end required power is determined according to the wheel speed and the preset ramp wheel end required torque.

[0020] Optionally, before determining the preset wheel end required power according to the wheel speed and the preset ramp required wheel end torque, the method further includes:

[0021] Obtain vehicle parameter templates for multiple test conditions;

[0022] Determine the wheel end torque of the test vehicle according to the test condition vehicle parameter template;

[0023] The minimum value is selected from the wheel end torques of the test vehicles to obtain the preset ramp wheel end required torque.

[0024] Optionally, determining the wheel end torque of the test vehicle according to the test condition vehicle parameter template includes:

[0025] Determine the test slope, wheel radius, vehicle speed and vehicle parameters according to the test condition vehicle parameter template;

[0026] The preset ramp wheel end required torque is calculated according to the test slope, wheel radius, vehicle speed and vehicle parameters.

[0027] Optionally, before determining that the current driving condition of the vehicle is a climbing condition, the method further includes:

[0028] Obtain the maximum engine water temperature corresponding to normal driving conditions;

[0029] When the current driving condition of the vehicle is a climbing condition, a preset water temperature corresponding to the climbing condition is determined according to the maximum engine water temperature corresponding to the normal driving condition, and the preset water temperature corresponding to the climbing condition is greater than the maximum engine water temperature corresponding to the normal driving condition.

[0030] In addition, to achieve the above-mentioned purpose, the present invention further provides a hill vehicle control device, the hill vehicle control device comprising:

[0031] An acquisition module is used to detect the current driving condition of the vehicle;

[0032] A processing module, used for obtaining the battery SOC and wheel-end required power of the current vehicle when the current driving condition of the vehicle is a climbing condition;

[0033] The processing module is further used to determine the engine power according to the battery SOC and the wheel end required power;

[0034] The processing module is further used to determine the engine speed according to the engine power, and control the engine power generation according to the engine power and the engine speed.

[0035] In addition, to achieve the above-mentioned purpose, the present invention also proposes a slope vehicle control device, which includes: a memory, a processor, and a slope vehicle control program stored in the memory and executable on the processor, and the slope vehicle control program is configured to implement the steps of the slope vehicle control method described above.

[0036] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which a hill vehicle control program is stored, and when the hill vehicle control program is executed by a processor, the steps of the hill vehicle control method described above are implemented.

[0037] The present invention detects the driving condition of the current vehicle; when the driving condition of the current vehicle is a climbing condition, obtains the battery SOC and wheel-end required torque of the current vehicle; determines the engine power according to the battery SOC and wheel-end required torque; determines the engine speed according to the engine power, and controls the vehicle according to the engine power and engine speed. This solution detects the driving condition of the vehicle, controls the engine power and engine speed according to the current battery SOC and wheel-end required torque when the vehicle is climbing, and improves the adaptability of the vehicle to climbing scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of a ramp vehicle control device in a hardware operating environment involved in an embodiment of the present invention;

[0039] Figure 2 It is a flow chart of a first embodiment of a method for controlling a vehicle on a slope according to the present invention;

[0040] Figure 3 It is a flow chart of a second embodiment of a method for controlling a vehicle on a slope according to the present invention;

[0041] Figure 4 It is a structural block diagram of the first embodiment of the hill vehicle control device of the present invention.

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of a ramp vehicle control device in the hardware operating environment involved in the embodiment of the present invention.

[0045] like Figure 1 As shown, the ramp vehicle control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0046] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the hill vehicle control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0047] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and a ramp vehicle control program.

[0048] exist Figure 1In the ramp vehicle control device shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the ramp vehicle control device of the present invention can be set in the ramp vehicle control device, and the ramp vehicle control device calls the ramp vehicle control program stored in the memory 1005 through the processor 1001, and executes the ramp vehicle control method provided by the embodiment of the present invention.

[0049] The embodiment of the present invention provides a method for controlling a vehicle on a slope, referring to Figure 2 , Figure 2 The figure is a flow chart of a first embodiment of a method for controlling a vehicle on a slope according to the present invention.

[0050] In this embodiment, the ramp vehicle control method includes the following steps:

[0051] Step S10: Detect the current driving condition of the vehicle.

[0052] It should be noted that the executor of this embodiment is the vehicle control system, which may be a vehicle controller or other devices with the same or similar functions as the vehicle controller. This embodiment does not limit this and only takes the vehicle controller as an example for explanation.

[0053] It should be noted that, in the process of applying this embodiment to vehicle climbing control, with the continuous development of the new energy vehicle industry, hybrid vehicle NVH control technology has become a research hotspot for major automobile companies. The current hybrid vehicle extended range charging strategy in the industry mainly selects the corresponding extended range charging MAP based on the vehicle SOC value. The extended range charging MAP refers to a three-dimensional relationship chart of the vehicle wheel-end demand power, vehicle speed and engine power or a two-dimensional relationship chart of the vehicle wheel-end demand power and engine power, wherein the actual requested power generation power divided by the power generation efficiency is the engine power, and there is a corresponding relationship between the engine power and the engine speed. In order to ensure better vehicle NVH performance, the engine speed corresponding to each engine power point will be limited to a lower level. However, for hybrid vehicles equipped with mechanical water pump engines, in order to ensure thermal management performance and prevent the engine from limiting torque and affecting power when driving on a slope, the engine is required to run at a high speed. At this time, the engine vibration and noise will be very large, which is very likely to cause customer complaints. Considering that the thermal management test condition of hybrid vehicles driving on a slope is an extreme condition, through ramp identification, when driving on a slope, the generator speed is increased to reduce heat damage to ensure the balance of power and SOC when the vehicle is driving on a slope. Based on the above, this embodiment proposes a control solution, which separates the vehicle climbing scenario from the normal driving condition and controls the engine power and engine speed through an independent extended-range charging strategy.

[0054] It is understandable that the driving condition is the identification of the current driving scene of the vehicle. The control logic of vehicles in different scenes may be different. For example, in order to meet the power requirements, economic requirements, thermal management requirements, etc., the corresponding relationship between SOC, wheel-end power requirements, engine power and engine speed will also be adjusted in different scenes of vehicles. Normal driving condition refers to the driving condition on flat roads.

[0055] It should be noted that this embodiment is mainly used to identify the climbing condition of the vehicle, and the specific detection method can be to identify through a slope sensor to determine whether the vehicle is on a slope. This detection method is simple and reliable.

[0056] Secondly, in order to save costs, you can also choose to determine the vehicle operating conditions through the actual parameters of the vehicle. For example, when the high-power generation of the vehicle's engine is still insufficient to support the current SOC of the vehicle, and the wheel-end power demand is large and the engine water temperature is high, it can be determined that the vehicle is in a climbing state, which further saves the vehicle's hardware costs.

[0057] Step S20: When the current vehicle is in a climbing condition, the battery SOC and wheel-end required power of the current vehicle are obtained.

[0058] It should be noted that when the current driving condition of the vehicle is a climbing condition, the engine is required to provide greater power compared to a normal driving condition, and the specific power can be calibrated according to the test condition.

[0059] It is understandable that the battery SOC can be directly obtained through the battery management system, and the wheel-end demand torque can be directly calculated through the user's accelerator pedal opening and vehicle speed or obtained by other power control devices.

[0060] Step S30: determining the engine power according to the battery SOC and the wheel end required torque.

[0061] It is understood that there is a relationship between the battery's SOC (State of Charge) and engine power, especially in hybrid and electric vehicles. This relationship involves the use, charging and output power of the battery: Battery SOC and Electric Drive Power: The battery's SOC can affect the electric drive power of an electric vehicle. When the SOC is higher, the battery stores more electrical energy and the vehicle can provide more electric drive power. This means that the vehicle can accelerate faster and provide better performance. Engine Output Power and SOC: In hybrid vehicles, the engine is usually used to charge the battery or power the electric motor. The engine's output power can be affected by the SOC. When the SOC is low, the engine may need to generate high power to charge the battery more. Management of SOC: The vehicle's battery management system usually monitors the SOC to ensure that it is within a safe range. If the SOC is too low, the vehicle will force the engine to start to charge the battery to ensure vehicle power and maintain the battery SOC. The specific correspondence between the battery SOC and the engine power can be calibrated through experiments under vehicle driving conditions.

[0062] It should be noted that the vehicle power demand can be determined based on the pre-set battery charge and wheel-end power demand. When the SOC does not meet the current demand, in order to achieve SOC balance, the engine power needs to be increased to ensure that the electrical SOC meets the actual demand. Therefore, the battery SOC and the wheel-end torque demand can be used to determine how much power the current engine should output.

[0063] Step S40: determining the engine speed according to the engine power, and controlling the engine power generation according to the engine power and the engine speed.

[0064] It should be noted that the speed that the current engine speed should meet can be determined based on the engine power. For example, the minimum engine speed that meets the thermal management requirements and fuel consumption requirements of climbing conditions can be determined based on the calibration value, and used as the engine speed to control the generator to generate electricity.

[0065] In this embodiment, the engine speed required for thermal management in a climbing condition is obtained; and the minimum engine speed that meets the thermal management requirements and fuel consumption requirements is determined based on the engine power, the engine speed required for thermal management and a preset engine universal characteristic curve.

[0066] Among them, the engine speed required for thermal management of hill climbing conditions is obtained according to the thermal management test of hill climbing conditions, and the minimum engine speed that meets the thermal management requirements and fuel consumption requirements is determined according to the engine power, the engine speed required for thermal management of hill climbing conditions and the preset engine universal characteristic curve.

[0067] It should be noted that the engine universal characteristic curve is based on the engine speed as the horizontal axis and the engine torque as the vertical axis. Many equal fuel consumption rate curves and equal power curves are drawn on the graph to form the engine universal characteristic. The engine universal characteristic curve records the control relationship of multiple parameters, such as: the relationship curve between engine power and engine speed, engine torque; the relationship curve between fuel consumption and engine speed, engine torque. Ultimately, the engine universal characteristic curve can be used to determine the engine speed that meets the output power, thermal management requirements and fuel consumption requirements.

[0068] In this embodiment, the maximum engine water temperature corresponding to the normal driving condition is obtained; when the current vehicle's driving condition is a climbing condition, the preset water temperature corresponding to the climbing condition is determined according to the maximum engine water temperature corresponding to the normal driving condition, and the preset water temperature corresponding to the climbing condition is greater than the maximum engine water temperature corresponding to the normal driving condition.

[0069] It should be noted that if the water temperature of the engine is too high, it will affect the engine performance and even damage the engine. Therefore, the engine generally has an appropriate temperature range. When the water temperature reaches the torque limit water temperature threshold, the engine will enter the torque limit mode to protect the engine. During the hybrid vehicle climbing thermal management test, the engine preset water temperature and engine speed can be calibrated and adjusted to ensure that the vehicle SOC is balanced during the test and the engine is not torque limited. The engine preset water temperature should be greater than the maximum generator water temperature when the vehicle is driving on a flat road, but less than the engine torque limit water temperature threshold. In the vehicle climbing condition, when the engine water temperature is greater than the preset water temperature, the vehicle is controlled to increase the engine speed, thereby avoiding the engine water temperature from continuing to rise, resulting in engine torque limitation, and ensuring the balance of power and SOC when driving on a slope.

[0070] In a specific implementation, in order to control the engine water temperature, the engine speed can be appropriately increased to accelerate the engine cooling cycle and ensure that the water temperature is maintained within an appropriate range. At the same time, since the wheel-end power demand is much greater than the normal driving condition during the climbing process, the water temperature will be higher than the normal driving condition. Therefore, this embodiment obtains the maximum engine water temperature corresponding to the normal driving condition to obtain the preset water temperature under the climbing condition. When the engine water temperature is greater than the preset water temperature, the vehicle is controlled to increase the engine speed to avoid the situation where the engine overheats and limits the engine torque under the climbing driving condition of the vehicle, thereby ensuring the balance of the power and SOC of the slope driving and avoiding excessive engine noise under the normal driving condition.

[0071] This embodiment detects the current vehicle driving condition; when the current vehicle driving condition is a climbing condition, obtains the battery SOC and wheel-end power demand of the current vehicle; determines the engine power according to the battery SOC and wheel-end power demand; determines the engine speed according to the engine power, and controls the vehicle according to the engine power and engine speed. This solution improves the adaptability of the vehicle to climbing scenarios by detecting the vehicle driving condition and controlling the engine power and engine speed according to the current battery SOC and the power demand when climbing.

[0072] refer to Figure 3 , Figure 3 The figure is a flow chart of a second embodiment of a method for controlling a vehicle on a slope according to the present invention.

[0073] Based on the first embodiment, the method for controlling a vehicle on a hill in this embodiment further includes, in step S10:

[0074] Step S11: Obtain the current battery SOC, wheel-end power demand and engine water temperature of the vehicle.

[0075] It should be noted that the battery SOC, wheel-end power demand and engine water temperature can be detected by various sensors of the vehicle, or calculated from the detected data. For example, the wheel-end power demand can be determined based on the vehicle throttle opening and current vehicle speed.

[0076] Step S12: When the battery SOC is less than a preset SOC threshold, the wheel-end demand power is greater than a preset wheel-end power, and the engine water temperature is greater than a preset water temperature, determining that the current vehicle driving condition is a climbing condition.

[0077] It is understandable that in order to identify the climbing condition without using a slope sensor, multiple climbing conditions can be calibrated through experiments to calibrate the data, and the climbing condition can be determined by identifying the corresponding parameter conditions during actual driving.

[0078] In the specific implementation, for hybrid vehicles, compared with normal driving conditions, the wheel-end power demand will increase significantly when the vehicle is climbing, and the battery SOC will continue to decrease. When SOC is less than the preset SOC threshold, the engine will be started to generate high power. Since the same engine power is lower for the vehicle speed, the engine heat dissipation effect is poor, and the water temperature will continue to rise. Therefore, the wheel power demand and the engine water temperature can accurately determine whether the current vehicle driving condition is a climbing condition.

[0079] In this embodiment, before determining that the current driving condition of the vehicle is a climbing condition, the method further includes: acquiring the current wheel speed of the vehicle; and determining a preset wheel end power according to the wheel speed and a preset ramp wheel end torque.

[0080] The vehicle wheel end power requirement can be calculated according to PWhReal=T0×n / 9550, where T0 is the preset ramp wheel end torque and n is the wheel speed. The preset ramp wheel end torque can be calculated according to the test conditions.

[0081] In this embodiment, a plurality of test condition vehicle parameter templates are obtained; the test vehicle wheel end torque is determined according to the test condition vehicle parameter template; and the minimum value is selected from each of the test vehicle wheel end torques to obtain a preset ramp wheel end torque.

[0082] The test condition vehicle parameter template can be based on T / R = mg·sinθ+μmg·cosθ+C D AV 2 / 21.15, where T is the wheel end torque, R is the wheel radius, m is the vehicle mass, μ is the friction coefficient between the tire and the concrete road surface, θ is the slope, C D is the vehicle's drag coefficient, A is the vehicle's frontal area, and V is the vehicle's speed.

[0083] In this embodiment, the wheel-end torque of the test vehicle is determined according to the test working condition vehicle parameter template, including: determining the test slope, wheel radius, vehicle speed and whole vehicle parameters according to the test working condition vehicle parameter template; calculating the preset ramp wheel-end torque according to the test slope, wheel radius, vehicle speed and whole vehicle parameters.

[0084] It should be noted that the wheel-end speed of the current vehicle is obtained, and the preset wheel-end power can be determined based on the wheel speed and the preset ramp wheel-end torque. Among them, the required power of the entire wheel end of the hybrid vehicle climbing thermal management test condition is obtained: the vehicle climbing condition required power is calculated through vehicle parameters, slope, etc., and the force analysis of the vehicle driving on the ramp is performed. The preset ramp wheel-end torque can be based on the force analysis formula to calculate the minimum wheel-end torque of the vehicle on the ramp: T / R= mg·sinθ+μmg·cosθ+C D AV 2 / 21.15, where T is the wheel end torque, R is the wheel radius, m is the vehicle mass, μ is the friction coefficient between the tire and the concrete road surface, θ is the slope, C Dis the vehicle drag coefficient, A is the vehicle frontal area, and V is the vehicle speed. For the specific solution process, this embodiment proposes the following preferred climbing scenario, for example: according to the thermal management test conditions, take θ=8%, V=50km / h, and solve for T1; take θ=6%, V=80km / h, and solve for T2. Take the smaller value of T1 and T2 as T0 (preset ramp wheel-end torque), where T1 and T2 can both be used as preset ramp wheel-end torques. This embodiment prefers T0 as the preset ramp wheel-end torque. This is because using a smaller torque as the preset ramp wheel-end torque can more accurately identify the slope condition and avoid misjudgment. Then solve the vehicle wheel-end demand power PWhReal=T0×n / 9550 calculated according to the vehicle wheel-end torque, where n is the engine speed.

[0085] When SOC is less than the predetermined threshold, the vehicle wheel-end power requirement PWhReq is greater than PWhReal, and the engine water temperature is greater than the preset water temperature Tmax℃, the ramp thermal management condition extended-range charging strategy is used, and the extended-range charging strategy for this condition is adjusted separately to prevent the engine from being torque-limited due to excessively high water temperature, so as to ensure the balance of the hybrid vehicle's ramp driving dynamics and SOC, while avoiding the high engine noise in normal driving conditions. In addition to this, the normal driving condition extended-range charging strategy is adopted. Among them, the method for obtaining the engine power of the hybrid vehicle climbing condition is as follows: To maintain the balance of power, the vehicle's required power (including the vehicle's wheel-end torque and the battery's required charging power) are all provided by the engine, and the battery's required charging power is pre-set according to the SOC. Therefore, according to the SOC and the vehicle's wheel-end required power, the hybrid vehicle's climbing condition engine power can be obtained. When the vehicle's required power is greater than or equal to the maximum power generation of the engine, the maximum power generation of the engine is used as the engine power of the climbing condition. When the vehicle's required power is less than the maximum power generation of the engine, the vehicle's wheel-end torque is used as the engine power of the climbing condition.

[0086] Among them, the preferred scheme for obtaining the engine speed of the hybrid vehicle climbing condition is as follows: according to the climbing thermal management test, the thermal management requirement engine speed of the climbing condition is obtained; the thermal management requirement engine speed is the engine speed that can be used to meet the thermal management requirement. Too low engine speed will cause the thermal cycle to be too slow and not conducive to heat dissipation. Therefore, meeting the thermal management requirement actually sets a lower limit for the engine speed. According to the climbing condition engine power, thermal management requirement engine speed and engine universal characteristic curve, the minimum engine speed that meets the thermal management requirement and fuel consumption requirement is obtained. At this time, the engine speed ≥ thermal management requirement engine speed. When the engine power remains unchanged, the higher the engine speed, the greater the engine noise. Therefore, the lowest possible engine speed must be selected under the premise of ensuring the vehicle's climbing power and fuel consumption requirements. The embodiment obtains the battery SOC, wheel-end required power and engine water temperature of the current vehicle; when the battery SOC is less than the preset SOC threshold, the wheel-end required power is greater than the preset wheel-end power and the engine water temperature is greater than the preset water temperature, it is determined that the current vehicle's driving condition is a climbing condition. In the above manner, the climbing condition can be determined without the need for a sensor, saving vehicle costs.

[0087] In addition, an embodiment of the present invention further provides a storage medium, on which a hill vehicle control program is stored. When the hill vehicle control program is executed by a processor, the steps of the hill vehicle control method described above are implemented.

[0088] Reference Figure 4 , Figure 4 It is a structural block diagram of the first embodiment of the hill vehicle control device of the present invention.

[0089] like Figure 4 As shown, the hill vehicle control device proposed in the embodiment of the present invention includes:

[0090] The acquisition module 10 is used to detect the current driving condition of the vehicle;

[0091] The processing module 20 is used to obtain the battery SOC and wheel-end required power of the current vehicle when the current driving condition of the vehicle is a climbing condition;

[0092] The processing module 20 is further used to determine the engine power according to the battery SOC and the wheel end required power;

[0093] The processing module 20 is further used to determine the engine speed according to the engine power, and control the engine to generate electricity according to the engine power and the engine speed.

[0094] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0095] In this embodiment, the acquisition module 10 detects the driving condition of the current vehicle; the processing module 20 acquires the battery SOC and wheel-end power demand of the current vehicle when the driving condition of the current vehicle is a climbing condition; the processing module 20 determines the engine power according to the battery SOC and wheel-end power demand; the processing module 20 determines the engine speed according to the engine power, and controls the vehicle according to the engine power and engine speed. This solution detects the driving condition of the vehicle, controls the engine power and engine speed according to the current battery SOC and wheel-end torque demand when the vehicle is climbing, and improves the adaptability of the vehicle to climbing scenarios.

[0096] The processing module 20 is also used to obtain the engine speed required by thermal management in a hill climbing condition;

[0097] The minimum engine speed that meets the thermal management requirement and the fuel consumption requirement is determined according to the engine power, the thermal management required engine speed and a preset engine universal characteristic curve.

[0098] The acquisition module 10 is also used to acquire the battery SOC, wheel end required power and engine water temperature of the current vehicle;

[0099] When the battery SOC is less than a preset SOC threshold, the wheel-end demand power is greater than a preset wheel-end power, and the engine water temperature is greater than a preset water temperature, it is determined that the current vehicle driving condition is a climbing condition.

[0100] The acquisition module 10 is also used to acquire the current wheel speed of the vehicle;

[0101] The preset wheel end required power is determined according to the wheel speed and the preset ramp wheel end required torque.

[0102] The acquisition module 10 is also used to acquire multiple test condition vehicle parameter templates;

[0103] Determine the wheel end torque of the test vehicle according to the test condition vehicle parameter template;

[0104] The minimum value is selected from the wheel end torques of the test vehicles to obtain the preset ramp wheel end required torque.

[0105] The acquisition module 10 is also used to determine the test slope, wheel radius, vehicle speed and vehicle parameters according to the test condition vehicle parameter template;

[0106] The preset ramp wheel end required torque is calculated according to the test slope, wheel radius, vehicle speed and vehicle parameters.

[0107] The acquisition module 10 is also used to acquire the maximum engine water temperature corresponding to the normal driving condition;

[0108] When the current driving condition of the vehicle is a climbing condition, a preset water temperature corresponding to the climbing condition is determined according to the maximum engine water temperature corresponding to the normal driving condition, and the preset water temperature corresponding to the climbing condition is greater than the maximum engine water temperature corresponding to the normal driving condition.

[0109] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0110] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the slope vehicle control method provided in any embodiment of the present invention, and will not be repeated here.

[0111] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0112] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0113] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0114] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling a vehicle on a slope, characterized in that: The hill vehicle control method comprises: Detect the current driving condition of the vehicle; When the current driving condition of the vehicle is a climbing condition, obtaining the battery SOC and wheel-end required power of the current vehicle; Determining the engine power according to the battery SOC and the wheel-end required power; determining an engine speed according to the engine power, and controlling the engine to generate electricity according to the engine power and the engine speed; The detecting of the current driving condition of the vehicle includes: Obtain the current vehicle's battery SOC, wheel-end required power, and engine water temperature; When the battery SOC is less than a preset SOC threshold, the wheel-end demand power is greater than a preset wheel-end power, and the engine water temperature is greater than a preset water temperature, it is determined that the current vehicle driving condition is a climbing condition.

2. The method according to claim 1, characterized in that Determining the engine speed according to the engine power includes: Obtain the engine speed required for thermal management in hill climbing conditions; The minimum engine speed that meets the thermal management requirement and the fuel consumption requirement is determined according to the engine power, the thermal management required engine speed and a preset engine universal characteristic curve.

3. The method according to claim 1, characterized in that Before determining that the current driving condition of the vehicle is a climbing condition, the method further includes: Get the current vehicle's wheel speed; The preset wheel end required power is determined according to the wheel speed and the preset ramp wheel end required torque.

4. The method according to claim 3, characterized in that Before determining the preset wheel end required power according to the wheel speed and the preset ramp required wheel end torque, the method further includes: Obtain vehicle parameter templates for multiple test conditions; Determine the wheel end torque of the test vehicle according to the test condition vehicle parameter template; The minimum value is selected from the wheel end torques of the test vehicles to obtain the preset ramp wheel end required torque.

5. The method according to claim 4, characterized in that Determining the wheel end torque of the test vehicle according to the test condition vehicle parameter template includes: Determine the test slope, wheel radius, vehicle speed and vehicle parameters according to the test condition vehicle parameter template; The preset ramp wheel end required torque is calculated according to the test slope, wheel radius, vehicle speed and vehicle parameters.

6. The method according to claim 1, characterized in that Before determining that the current driving condition of the vehicle is a climbing condition, the method further includes: Obtain the maximum engine water temperature corresponding to normal driving conditions; When the current driving condition of the vehicle is a climbing condition, a preset water temperature corresponding to the climbing condition is determined according to the maximum engine water temperature corresponding to the normal driving condition, and the preset water temperature corresponding to the climbing condition is greater than the maximum engine water temperature corresponding to the normal driving condition.

7. A ramp vehicle control device, characterized in that: The hill vehicle control device comprises: An acquisition module is used to detect the current driving condition of the vehicle; The acquisition module is further used to acquire the battery SOC, wheel-end required power and engine water temperature of the current vehicle; when the battery SOC is less than a preset SOC threshold, the wheel-end required power is greater than a preset wheel-end power and the engine water temperature is greater than a preset water temperature, it is determined that the current vehicle driving condition is a climbing condition; A processing module, used for obtaining the battery SOC and wheel-end required power of the current vehicle when the current driving condition of the vehicle is a climbing condition; The processing module is further used to determine the engine power according to the battery SOC and the wheel end required power; The processing module is further used to determine the engine speed according to the engine power, and control the engine power generation according to the engine power and the engine speed.

8. A ramp vehicle control device, characterized in that: The device comprises: a memory, a processor, and a hill-climbing vehicle control program stored in the memory and executable on the processor, wherein the hill-climbing vehicle control program is configured to implement the steps of the hill-climbing vehicle control method according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium stores a hill vehicle control program, and when the hill vehicle control program is executed by the processor, the steps of the hill vehicle control method according to any one of claims 1 to 6 are implemented.

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