Parallel driving control method, device and equipment of hybrid vehicle and storage medium

Abstract

The application discloses a hybrid vehicle parallel driving control method and device, equipment and storage medium, comprising: when the vehicle enters the parallel driving mode, acquiring the accelerator pedal signal of the vehicle and the state information of the vehicle; determining the demand torque of the vehicle according to the accelerator pedal signal; determining the driving strategy according to the state information and the demand torque, and driving the vehicle to run according to the driving strategy. Since the application determines the demand torque of the vehicle according to the accelerator pedal signal of the vehicle when the vehicle enters the parallel driving mode, determines the driving strategy in the parallel mode according to the state information and the demand torque of the vehicle, and drives the vehicle to run according to the driving strategy, the driving strategy can be determined according to the demand torque and the state information of the vehicle, the technical problem that the control mode of the vehicle in the parallel driving mode is inaccurate and leads to high fuel consumption is solved, and the fuel consumption of the vehicle is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hybrid vehicles, in particular to a hybrid vehicle parallel driving control method, device, equipment and storage medium. BACKGROUND

[0002] At present, hybrid electric vehicles have become an important direction of research and development of major automobile manufacturers. Hybrid electric vehicles generally output torque to wheels in a multi-power source torque coupling mode to drive vehicle running. The driving mode of the hybrid electric vehicle is generally divided into pure electric mode, series mode and parallel mode. The vehicle adopts pure electric mode or series mode at low speed, and adopts pure electric mode, parallel mode or series mode at high speed. However, when the hybrid electric vehicle enters the parallel mode, the control mode for the parallel mode is not accurate, resulting in high fuel consumption of the vehicle. Therefore, how to improve the accuracy of the control of the hybrid electric vehicle in the parallel mode has become a technical problem to be solved.

[0003] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0004] The main purpose of the present application is to provide a hybrid vehicle parallel driving control method, device, equipment and storage medium, which aims to solve the technical problem of high fuel consumption caused by inaccurate control of the hybrid vehicle in the parallel mode in the prior art.

[0005] To achieve the above purpose, the present application provides a hybrid vehicle parallel driving control method, which comprises the following steps:

[0006] When the vehicle enters the parallel driving mode, the accelerator pedal signal of the vehicle and the state information of the vehicle are obtained;

[0007] The demand torque of the vehicle is determined according to the accelerator pedal signal;

[0008] The driving strategy is determined according to the state information and the demand torque, and the vehicle is driven to run according to the driving strategy.

[0009] Optionally, the driving strategy is determined according to the state information and the demand torque, and the vehicle is driven to run according to the driving strategy, comprising:

[0010] The preset torque interval in which the demand torque is located is determined, and the battery capacity of the vehicle is determined according to the state information;

[0011] The driving strategy is determined according to the preset torque interval and the battery capacity, and the vehicle is driven to run according to the driving strategy.

[0012] Optionally, the determining the driving strategy according to the preset torque range and the battery power and driving the vehicle to travel according to the driving strategy comprises:

[0013] when the preset torque range is the high torque range, determining whether the required torque is greater than a preset switching torque;

[0014] if yes, determining whether the battery power is less than a first preset power threshold;

[0015] if yes, controlling the vehicle to exit the parallel driving mode and enter the series driving mode to drive the vehicle to travel.

[0016] Optionally, after the determining whether the battery power is less than the first preset power threshold, the method further comprises:

[0017] if no, controlling the engine of the vehicle to operate according to a maximum power curve to output a first torque and controlling the driving motor of the vehicle to output a second torque;

[0018] driving the vehicle to travel by the first torque and the second torque.

[0019] Optionally, the determining the driving strategy according to the preset torque range and the battery power and driving the vehicle to travel according to the driving strategy comprises:

[0020] when the preset torque range is the economic torque range, determining whether the battery power is less than a first preset power threshold;

[0021] if yes, controlling the engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque;

[0022] charging the battery pack by the first power generation torque and driving the vehicle to travel by the first driving torque.

[0023] Optionally, after the determining whether the battery power is less than the first preset power threshold, the method further comprises:

[0024] if no, determining whether the battery power is less than a second preset power threshold, the second preset power threshold being greater than the first preset power threshold;

[0025] if yes, controlling the engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second power generation torque;

[0026] charging the battery pack by the second power generation torque and driving the vehicle to travel by the second driving torque.

[0027] Optionally, after the determining whether the battery power is less than the second preset power threshold, the method further comprises:

[0028] If not, determining a compensation power according to a third preset power threshold, a compensation power threshold and the battery power, the third preset power threshold being greater than the second preset power threshold;

[0029] Obtaining an engine speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine speed value;

[0030] Controlling an engine of the vehicle to output the demand torque and the compensation torque;

[0031] Charging the battery pack through the compensation torque, and driving the vehicle to travel through the demand torque.

[0032] In addition, to achieve the above object, the present application further provides a parallel driving control device for a hybrid vehicle, which comprises:

[0033] An obtaining module, configured to obtain an accelerator pedal signal of the vehicle and state information of the vehicle when the vehicle enters a parallel driving mode;

[0034] A determining module, configured to determine a demand torque of the vehicle according to the accelerator pedal signal;

[0035] A driving module, configured to determine a driving strategy according to the state information and the demand torque, and drive the vehicle to travel according to the driving strategy.

[0036] In addition, to achieve the above object, the present application further provides a parallel driving control device for a hybrid vehicle, which comprises a memory, a processor and a hybrid vehicle parallel driving control program stored in the memory and executable on the processor, the hybrid vehicle parallel driving control program being configured to implement the steps of the parallel driving control method for a hybrid vehicle as described above.

[0037] In addition, to achieve the above object, the present application further provides a storage medium having a hybrid vehicle parallel driving control program stored thereon, the hybrid vehicle parallel driving control program being executable on a processor to implement the steps of the parallel driving control method for a hybrid vehicle as described above.

[0038] The application obtains the throttle pedal signal of the vehicle and the state information of the vehicle when the vehicle enters the parallel driving mode, determines the required torque of the vehicle according to the throttle pedal signal, determines the driving strategy according to the state information and the required torque, and drives the vehicle to run according to the driving strategy. Since the application determines the required torque of the vehicle according to the throttle pedal signal of the vehicle when the vehicle enters the parallel driving mode, determines the driving strategy in the parallel mode according to the state information and the required torque, and drives the vehicle to run according to the driving strategy, the driving strategy can be determined according to the required torque and the state information of the vehicle, the technical problem of high fuel consumption caused by the inaccurate control mode of the vehicle in the parallel driving mode is solved, and the fuel consumption of the vehicle is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a structural schematic diagram of a parallel driving control device of a hybrid vehicle related to the hardware running environment of the embodiment scheme of the application.

[0040] Figure 2 is a flowchart of a first embodiment of a parallel driving control method of a hybrid vehicle of the application.

[0041] Figure 3 is a schematic diagram of the division of the electric quantity of a battery pack in an embodiment of the parallel driving control method of a hybrid vehicle of the application.

[0042] Figure 4 is a flowchart of a second embodiment of a parallel driving control method of a hybrid vehicle of the application.

[0043] Figure 5 is a structural block diagram of a first embodiment of a parallel driving control device of a hybrid vehicle of the application.

[0044] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are intended to explain the application, but not to limit the application.

[0046] Reference Figure 1 , Figure 1 is a structural schematic diagram of a parallel driving control device of a hybrid vehicle related to the hardware running environment of the embodiment scheme of the application.

[0047] As Figure 1As shown in the figure, the parallel driving control device of the hybrid vehicle can 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. The communication bus 1002 is used to realize the connection and communication between the components. The user interface 1003 can include a display, an input unit such as a keyboard, and can also include a standard wired interface and a wireless interface. The network interface 1004 can optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WI-FI) interface). The memory 1005 can be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art can understand that Figure 1 The structure shown in the figure does not constitute a limitation on the parallel driving control device of the hybrid vehicle, and can include more or fewer components than the figure, or combine certain components, or different component arrangements.

[0049] As Figure 1 As shown in the figure, the memory 1005 as a storage medium can include an operating system, a network communication module, a user interface module, and a parallel driving control program of the hybrid vehicle.

[0050] In Figure 1 In the parallel driving control device of the hybrid vehicle shown in the figure, 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 the user; the processor 1001 and the memory 1005 in the parallel driving control device of the hybrid vehicle can be arranged in the parallel driving control device of the hybrid vehicle. The parallel driving control device of the hybrid vehicle calls the parallel driving control program of the hybrid vehicle stored in the memory 1005 through the processor 1001, and executes the parallel driving control method of the hybrid vehicle provided by the embodiment of the application.

[0051] The embodiment of the application provides a parallel driving control method of a hybrid vehicle, which refers to Figure 2 , Figure 2 The flowchart of the first embodiment of the parallel driving control method of the hybrid vehicle of the application.

[0052] In this embodiment, the parallel driving control method of the hybrid vehicle includes the following steps:

[0053] Step S1: When the vehicle enters the parallel driving mode, the throttle pedal signal of the vehicle and the state information of the vehicle are acquired.

[0054] It should be noted that the execution subject of the embodiment can be a computing service device with data processing, network communication and program running functions, such as an on-board computer, a vehicle controller, or an electronic device capable of realizing the above functions, a hybrid vehicle parallel driving mode control device, etc. The vehicle controller is taken as an example to illustrate the embodiment and the following embodiments.

[0055] In the embodiment, the hybrid vehicle can be a P1+P3 structure hybrid vehicle; when the vehicle meets the preset condition, the vehicle enters the parallel driving mode, and the preset condition can be that the vehicle speed is greater than the preset speed, the battery capacity is greater than the preset capacity, and / or the throttle pedal depth is greater than the preset depth, which can be set according to the specific situation; the throttle pedal signal can be a signal representing the throttle pedal opening; the state information can be information in the vehicle driving process, including battery capacity, component temperature and whether the component is abnormal, etc.

[0056] In specific implementation, when the vehicle meets the preset condition, the vehicle is controlled to enter the parallel driving mode, and the throttle pedal signal of the vehicle and the battery capacity, component temperature, etc. of the vehicle are acquired.

[0057] Step S2: Determine the demand torque of the vehicle according to the throttle pedal signal.

[0058] It can be understood that the demand torque can be the torque requested by the driver through the throttle pedal for the vehicle power system to output for driving the vehicle to travel, and the throttle pedal signal can be used to determine the throttle opening, and the corresponding demand torque can be determined according to the throttle opening and the preset mapping relationship between the throttle opening and the torque.

[0059] Step S3: Determine the driving strategy according to the state information and the demand torque, and drive the vehicle to travel according to the driving strategy.

[0060] It can be understood that the driving strategy can be a strategy for controlling the vehicle power system to output torque to drive the vehicle to travel; determining the driving strategy according to the state information and the demand torque can be determining the vehicle working condition according to the state information, and determining the driving strategy according to the vehicle working condition and the demand torque.

[0061] In a specific implementation, the vehicle controller controls the vehicle to enter the parallel driving mode when the vehicle meets preset conditions, determines an accelerator opening degree according to an acquired accelerator pedal signal, determines a required torque corresponding to the accelerator pedal signal according to a preset mapping relationship between the accelerator opening degree and the torque, determines a vehicle working condition according to state information of the vehicle, determines a corresponding driving strategy according to the vehicle working condition and the required torque, and controls the vehicle power system to output a torque to drive the vehicle to run according to the driving strategy.

[0062] Further, in order to improve the accuracy of the hybrid vehicle control in the parallel driving mode, the step S3 comprises:

[0063] Step S31: determining a preset torque interval in which the required torque is located, and determining a battery capacity of the vehicle according to the state information.

[0064] It can be understood that the preset torque interval can be an interval preset for distinguishing the size of the required torque, the preset torque interval comprises a low torque interval, an economic torque interval and a high torque interval, the required torque in the low torque interval indicates that a torque required to be output by the vehicle power system is small, the required torque in the economic torque interval indicates that a torque required to be output by the vehicle power system is moderate, and the required torque in the high torque interval indicates that a torque required to be output by the vehicle power system is large, for example, the above three torque intervals can be represented as [a, b), [b, c) and [c, d] in turn, where a < b < c, the torque interval can also be represented in other forms, which is not limited in the embodiment; the battery capacity can be a remaining capacity of a vehicle power battery.

[0065] Step S32: determining a driving strategy according to the preset torque interval and the battery capacity, and driving the vehicle to run according to the driving strategy.

[0066] It should be understood that determining the driving strategy according to the preset torque interval and the battery capacity can be determining the driving strategy according to the type of the preset torque interval and the battery capacity.

[0067] In a specific implementation, assuming that the preset torque interval in which the required torque is located is the low torque interval, indicating that the torque required to be output by the vehicle power system is small, when the battery capacity of the vehicle is greater than a first preset capacity threshold, in order to reduce the fuel consumption of the vehicle, the vehicle is controlled to switch from the parallel driving mode to the pure electric driving mode.

[0068] Further, in order to prevent the battery pack performance from being damaged due to long-time power shortage, the step S32 comprises: when the preset torque range is a high torque range, judging whether the required torque is greater than a preset switching torque; if yes, judging whether the battery power is less than a first preset power threshold; if yes, controlling the vehicle to exit the parallel driving mode and enter a series driving mode to drive the vehicle to travel.

[0069] It can be understood that the preset switching torque can be a preset torque value, which can be calibrated according to the motor driving capability, the battery pack power supply capability and the series-parallel clutch switching smoothness requirement, and stored in the local storage after calibration. In use, it can be directly read from the local storage. If the required torque is greater than the preset switching torque, it indicates that the engine and the driving motor need to provide torque to the vehicle together. The first preset power threshold can be a preset power boundary value of forced power generation, that is, when the battery pack power is less than the first preset power threshold, the battery pack needs to be forced to charge for protection. The series driving mode can be a series power generation driving mode.

[0070] Further, in order to reduce the fuel consumption of the vehicle while meeting the torque demand of the vehicle, after judging whether the battery power is less than the first preset power threshold, the method further comprises: if no, controlling the engine of the vehicle to operate according to a maximum power curve to output a first torque, and controlling the driving motor of the vehicle to output a second torque; and driving the vehicle to travel by the first torque and the second torque.

[0071] It can be understood that when the required torque is in the high torque range, it indicates that the torque output by the vehicle power system is large. In order to meet the power demand of the vehicle, the engine and the driving motor work at the same time, the engine outputs the first torque, the driving motor outputs the second torque, the sum of the first torque and the second torque is the required torque, and the vehicle is driven to travel by the first torque and the second torque.

[0072] In specific implementation, reference can be made to Figure 3 , Figure 3The schematic diagram for dividing the power of the battery pack is shown in FIG. 1. Ve is the minimum power of the battery pack, and the vehicle is not allowed to have high voltage when the power is lower than Ve. For example, Ve can be set to 30%. Vf is the first preset power threshold, and forced power generation is needed when the power is lower than Vf. For example, Vf can be set to 38%. Vg is the second preset power threshold, and power generation is given priority when the power is lower than Vg, and NVH and drivability are given less priority. For example, Vg can be set to 48%. Vl is the compensation power threshold, and the maximum compensation power is compensated when the power is lower than Vl. For example, Vl can be set to 55%. Vb is the third preset power threshold, and no power compensation is performed when the power is higher than Vb. For example, Vb can be set to 62%. Vh is the maximum power of the battery pack, and the battery pack is not allowed to be charged when the power is higher than Vh. For example, Vh can be set to 78%. The above power values can be set to other values according to actual conditions, which are not limited in the embodiment. When the demand torque is in the high-torque curve, it is determined whether the demand torque is greater than the preset switching torque. If not, the parallel driving mode is switched to the series driving mode. Due to the characteristics of the P1+P3 structure, the series driving mode is more fuel-efficient than the parallel mode at this time. If the demand torque is greater than the preset switching torque, it is proved that the demand torque is large at this time, and the engine and the driving motor need to jointly provide torque to the vehicle. However, if the battery pack is discharged in the low-power condition, the battery pack will be damaged. In order to protect the battery pack, it is determined whether the power of the battery pack is less than Vf. Vf is a specific calibration value, which is determined according to the actual characteristics of the vehicle. Generally, the value is small. When the battery power is lower than the limit value Vf, the power performance is sacrificed to protect the battery pack, and the parallel driving mode is forced to exit and enter the series power generation mode. If the battery power is higher than the limit value Vf, it is proved that the battery pack has output capability, and the parallel mode is maintained, and the engine is controlled to run according to the maximum power curve LVmax to output the first torque. The battery pack discharges to output the second torque to the driving motor. The whole vehicle torque demand is met through the first torque and the second torque. At this time, it is the parallel discharge mode, and the battery power will continue to decrease. The ratio of the first torque and the second torque can be preset.

[0073] In the embodiment, when the vehicle enters the parallel driving mode, the accelerator pedal signal of the vehicle and the state information of the vehicle are acquired. The demand torque of the vehicle is determined according to the accelerator pedal signal. The driving strategy is determined according to the state information and the demand torque, and the vehicle is driven to travel according to the driving strategy. Since the demand torque of the vehicle is determined according to the accelerator pedal signal of the vehicle, the driving strategy in the parallel mode is determined according to the state information and the demand torque, and the vehicle is driven to travel according to the driving strategy when the vehicle enters the parallel driving mode, the driving strategy can be determined according to the demand torque and the state information of the vehicle, and the technical problem that the control mode of the vehicle in the parallel driving mode is inaccurate and causes high fuel consumption is solved, and the fuel consumption of the vehicle is reduced.

[0074] Reference Figure 4 ,Figure 4 Flowchart of a second embodiment of the parallel driving control method for the hybrid vehicle of the present application.

[0075] Based on the first embodiment, in the present embodiment, the step S32 comprises:

[0076] Step S321: When the preset torque range is the economic torque range, it is determined whether the battery power is less than a first preset power threshold.

[0077] It can be understood that when the demand torque is in the economic torque range, the fuel consumption of the vehicle is the highest; if the demand torque is in the economic torque range, it indicates that the demand torque corresponding to the accelerator pedal signal is not very large or very small, which is determined by the characteristics of the P1+P3 structure hybrid vehicle, and the parallel driving mode is more fuel-efficient.

[0078] Step S322: If yes, the engine of the vehicle is controlled to operate according to the maximum power curve to output a first driving torque and a first power generation torque.

[0079] It can be understood that when the battery power is less than the first preset power threshold, it indicates that the battery pack is in the forced power generation area and needs to supplement the power for the battery pack, at this time the torque output by the engine according to the maximum power curve is divided into two parts, one part is the first driving torque for driving the vehicle to run, and the other part is the first power generation torque for charging the battery pack through the driving motor.

[0080] Step S323: The first power generation torque is used to charge the battery pack, and the first driving torque is used to drive the vehicle to run.

[0081] In a specific implementation, when the demand torque is in the economic torque range, it is determined whether the battery power is less than the first power threshold, and if yes, it indicates that the battery pack is in the forced power generation area, the engine is controlled to operate according to the maximum power curve to output a first driving torque for driving the vehicle to run and a first power generation torque for charging the battery pack through the driving motor, wherein the ratio of the first driving torque to the first power generation torque can be preset.

[0082] Further, in order to protect the battery pack, after determining whether the battery power is less than the first preset power threshold, it further comprises: if no, it is determined whether the battery power is less than a second preset power threshold, the second preset power threshold is greater than the first preset power threshold; if yes, the engine of the vehicle is controlled to operate according to the power priority curve to output a second driving torque and a second power generation torque; the second power generation torque is used to charge the battery pack, and the second driving torque is used to drive the vehicle to run.

[0083] In a specific implementation, when the battery power is greater than the first preset power threshold, it is determined whether the battery power is less than the second power threshold. If yes, it indicates that the battery pack is in a priority power generation zone, at which time power generation is prioritized, and NVH and drivability are secondary considerations. The engine is controlled to operate according to a power priority curve, and outputs a second driving torque for driving the vehicle to travel and a second power generation torque for charging the battery pack by the driving motor, wherein the ratio of the second driving torque to the second power generation torque can be preset.

[0084] Further, in order to maintain the battery power at a high level, after determining whether the battery power is less than the second preset power threshold, the method further comprises: if no, determining a compensation power according to a third preset power threshold, a compensation power threshold, and the battery power, the third preset power threshold being greater than the second preset power threshold; obtaining an engine speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine speed value; controlling the engine of the vehicle to output the demand torque and the compensation torque; charging the battery pack by the compensation torque, and driving the vehicle to travel by the demand torque.

[0085] It can be understood that the compensation power can be a power for slightly charging the battery pack, and the compensation power threshold is less than the third preset power threshold. The battery pack is charged in this embodiment in order to maintain the battery power between the compensation power threshold and the third preset power threshold. Determining the compensation power according to the third preset power threshold, the compensation power threshold, and the battery power can be determining the compensation power according to the third preset power threshold, the compensation power threshold, and the battery power by a first formula. Determining the compensation torque according to the compensation power and the engine speed value can be determining the compensation torque according to the compensation power and the engine speed value by a second formula. The first formula and the second formula are as follows:

[0086]

[0087] In the formula, p is the compensation power; Vb is the third preset power threshold; Vl is the compensation power threshold; k is the maximum compensation power;

[0088]

[0089] In the formula, T is the compensation torque; rpm is the engine speed value.

[0090] In a specific implementation, continuing to refer to Figure 3When the demand torque is in the economic torque range, it is determined whether the battery power is lower than Vf. If the battery power is lower than Vf, the parallel mode is maintained, but the engine runs according to the maximum power curve LVmax. At this time, it is the parallel charging mode, the first driving torque output by the engine drives the vehicle to run, and the first power generation torque output by the engine is recovered to the battery pack through the drive motor to quickly charge the battery pack, so as to quickly increase the battery power to reserve energy for the battery pack. If the battery power is not lower than Vf, it is determined whether the battery power is lower than Vg. If the battery power is lower than Vg, it is determined that the battery power is relatively low at this time, the parallel mode is still maintained, the engine is controlled to run according to the power priority curve LVg, the second driving torque output by the engine drives the vehicle to run, and the second power generation torque output by the engine is quickly charged to the battery pack through the drive motor. If the battery power is higher than Vg, it is proved that the battery power is relatively sufficient at this time, and the parallel direct drive mode is adopted. The output torque of the engine = demand torque + compensation torque. The purpose of this method is to let the engine output most of the torque to drive the vehicle, and less torque is converted into electric energy through the motor to provide power to other electric appliances of the vehicle and slightly charge the battery pack, so that the battery power is maintained between the high power state Vl and Vb. The compensation torque does not need to be too large. Generally, the compensation power p and the compensation torque T determined according to the compensation power p are calculated by converting the power into the torque.

[0091] In the embodiment, when the preset torque range is the economic torque range, it is determined whether the battery power is less than the first preset power threshold. If the battery power is less than the first preset power threshold, the engine of the vehicle is controlled to run according to the maximum power curve to output the first driving torque and the first power generation torque. The first power generation torque is used to charge the battery pack, and the first driving torque is used to drive the vehicle to run.

[0092] In addition, the embodiment of the present application also provides a storage medium, and the storage medium stores a hybrid vehicle parallel driving control program. When the hybrid vehicle parallel driving control program is executed by a processor, the steps of the hybrid vehicle parallel driving control method described above are implemented.

[0093] Referring to Figure 5 , Figure 5 FIG. 1 is a structural block diagram of a hybrid vehicle parallel driving control device according to a first embodiment of the present application.

[0094] As Figure 5 shown, the hybrid vehicle parallel driving control device provided by the embodiment of the present application comprises:

[0095] an acquisition module 10 configured to acquire a throttle pedal signal of the vehicle and state information of the vehicle when the vehicle enters the parallel driving mode;

[0096] a determination module 20 configured to determine a required torque of the vehicle according to the throttle pedal signal;

[0097] a driving module 30 configured to determine a driving strategy according to the state information and the required torque, and drive the vehicle to travel according to the driving strategy.

[0098] The embodiment acquires a throttle pedal signal of the vehicle and state information of the vehicle when the vehicle enters the parallel driving mode, determines a required torque of the vehicle according to the throttle pedal signal, determines a driving strategy according to the state information and the required torque, and drives the vehicle to travel according to the driving strategy. Since the embodiment determines a required torque of the vehicle according to a throttle pedal signal of the vehicle when the vehicle enters the parallel driving mode, determines a driving strategy in the parallel mode according to the state information and the required torque, and drives the vehicle to travel according to the driving strategy, the driving strategy can be determined according to the required torque and the state information of the vehicle, the technical problem of high fuel consumption caused by an inaccurate control mode of the vehicle in the parallel driving mode is solved, and the fuel consumption of the vehicle is reduced.

[0099] Based on the first embodiment of the parallel driving control device of the hybrid vehicle, a second embodiment of the parallel driving control device of the hybrid vehicle is provided.

[0100] In the embodiment, the driving module 30 is further configured to determine a preset torque interval in which the required torque is located, determine a battery power of the vehicle according to the state information, determine a driving strategy according to the preset torque interval and the battery power, and drive the vehicle to travel according to the driving strategy.

[0101] The driving module 30 is further configured to, when the preset torque interval is a high torque interval, determine whether the required torque is greater than a preset switching torque, if yes, determine whether the battery power is less than a first preset power threshold, if yes, control the vehicle to exit the parallel driving mode and enter a serial driving mode to drive the vehicle to travel.

[0102] The driving module 30 is further configured to, if no, control an engine of the vehicle to operate according to a maximum power curve to output a first torque, and control a driving motor of the vehicle to output a second torque, and drive the vehicle to travel by the first torque and the second torque.

[0103] The driving module 30 is further configured to determine whether the battery power is less than a first preset power threshold when the preset torque range is an economic torque range; if yes, control the engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque; charge the battery pack by the first power generation torque, and drive the vehicle to travel by the first driving torque.

[0104] The driving module 30 is further configured to determine whether the battery power is less than a second preset power threshold if no, the second preset power threshold being greater than the first preset power threshold; if yes, control the engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second power generation torque; charge the battery pack by the second power generation torque, and drive the vehicle to travel by the second driving torque.

[0105] The driving module 30 is further configured to determine a compensation power according to a third preset power threshold, a compensation power threshold and the battery power if no, the third preset power threshold being greater than the second preset power threshold; acquire an engine speed value of the vehicle, and determine a compensation torque according to the compensation power and the engine speed value; control the engine of the vehicle to output the demand torque and the compensation torque; charge the battery pack by the compensation torque, and drive the vehicle to travel by the demand torque.

[0106] Other embodiments or specific implementations of the hybrid vehicle parallel driving control device can refer to the above-mentioned method embodiments, which will not be described here.

[0107] It should be noted that in this document, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or system. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or system including the element.

[0108] The above-mentioned embodiment numbers of the application are only for description, not representing the advantages and disadvantages of the embodiments.

[0109] Through the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned example method can be realized by means of software and a necessary general hardware platform, and of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk) and includes a number of instructions for causing an end device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method described in each embodiment of the present application.

[0110] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling parallel driving of a hybrid vehicle, characterized by, The method comprises: acquiring a throttle pedal signal of the vehicle and state information of the vehicle when the vehicle enters a parallel driving mode; determining a required torque of the vehicle according to the throttle pedal signal; determining a driving strategy according to the state information and the required torque, and driving the vehicle to travel according to the driving strategy; the determining of the driving strategy according to the state information and the required torque, and the driving of the vehicle to travel according to the driving strategy, comprising: determining a preset torque interval in which the required torque is located, and determining a battery capacity of the vehicle according to the state information; determining a driving strategy according to the preset torque interval and the battery capacity, and driving the vehicle to travel according to the driving strategy, the driving strategy being a strategy of controlling a vehicle power system to output a torque to drive the vehicle to travel; the determining of the driving strategy according to the preset torque interval and the battery capacity, and the driving of the vehicle to travel according to the driving strategy, comprising: when the preset torque interval is an economic torque interval, judging whether the battery capacity is less than a first preset capacity threshold value; if yes, controlling an engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque; charging a battery pack through the first power generation torque, and driving the vehicle to travel through the first driving torque; after the judging of whether the battery capacity is less than the first preset capacity threshold value, further comprising: if no, judging whether the battery capacity is less than a second preset capacity threshold value, the second preset capacity threshold value being greater than the first preset capacity threshold value; if yes, controlling the engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second power generation torque; charging the battery pack through the second power generation torque, and driving the vehicle to travel through the second driving torque; after the judging of whether the battery capacity is less than the second preset capacity threshold value, further comprising: if no, determining a compensation power according to a third preset capacity threshold value, a compensation capacity threshold value and the battery capacity, the third preset capacity threshold value being greater than the second preset capacity threshold value; acquiring an engine speed value of the vehicle, and determining a compensation torque according to the compensation power and the engine speed value; controlling the engine of the vehicle to output the required torque and the compensation torque; charging the battery pack through the compensation torque, and driving the vehicle to travel through the required torque.

2. The method of claim 1, wherein, the determining of the driving strategy according to the preset torque interval and the battery capacity, and the driving of the vehicle to travel according to the driving strategy, comprising: when the preset torque interval is a high torque interval, judging whether the required torque is greater than a preset switching torque; if yes, judging whether the battery capacity is less than a first preset capacity threshold value; if yes, controlling the vehicle to exit the parallel driving mode, and controlling the vehicle to enter a series driving mode to drive the vehicle to travel.

3. The method of claim 2, wherein, after the judging of whether the battery capacity is less than the first preset capacity threshold value, further comprising: if no, controlling an engine of the vehicle to operate according to a maximum power curve to output a first torque, and controlling a driving motor of the vehicle to output a second torque; Drive the vehicle to travel by the first torque and the second torque.

4. A hybrid vehicle parallel drive control device characterized by comprising: The device comprises: An acquisition module, configured to acquire a throttle pedal signal of the vehicle and state information of the vehicle when the vehicle enters a parallel driving mode; A determination module, configured to determine a required torque of the vehicle according to the throttle pedal signal; A driving module, configured to determine a driving strategy according to the state information and the required torque, and drive the vehicle to travel according to the driving strategy; The driving module is further configured to determine a preset torque interval in which the required torque is located, and determine a battery power of the vehicle according to the state information; determine a driving strategy according to the preset torque interval and the battery power, and drive the vehicle to travel according to the driving strategy, the driving strategy being a strategy of controlling a vehicle power system to output a torque to drive the vehicle to travel; The driving module is further configured to, when the preset torque interval is an economic torque interval, judge whether the battery power is less than a first preset power threshold; if yes, control an engine of the vehicle to operate according to a maximum power curve to output a first driving torque and a first power generation torque; charge a battery pack by the first power generation torque, and drive the vehicle to travel by the first driving torque; if not, judge whether the battery power is less than a second preset power threshold, the second preset power threshold being greater than the first preset power threshold; if yes, control the engine of the vehicle to operate according to a power priority curve to output a second driving torque and a second power generation torque; charge the battery pack by the second power generation torque, and drive the vehicle to travel by the second driving torque; if not, determine a compensation power according to a third preset power threshold, a compensation power threshold and the battery power, the third preset power threshold being greater than the second preset power threshold; acquire an engine speed value of the vehicle, and determine a compensation torque according to the compensation power and the engine speed value; control the engine of the vehicle to output the required torque and the compensation torque; charge the battery pack by the compensation torque, and drive the vehicle to travel by the required torque.

5. A hybrid vehicle parallel drive control apparatus characterized by comprising: The device comprises a memory, a processor and a hybrid vehicle parallel driving control program stored on the memory and executable on the processor, the hybrid vehicle parallel driving control program being configured to implement the steps of the hybrid vehicle parallel driving control method according to any one of claims 1 to 3.

6. A storage medium, characterized by The storage medium has a hybrid vehicle parallel driving control program stored thereon, the hybrid vehicle parallel driving control program being executable by a processor to implement the steps of the hybrid vehicle parallel driving control method according to any one of claims 1 to 3.

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