Hybrid Power System Control Method, Device and Vehicle

Abstract

The present invention relates to the field of hybrid vehicles, and provides a control method, device and vehicle for a hybrid power system. The method includes: obtaining traffic information in the future driving distance of the vehicle; determining the change amount of the state of charge (SOC) of the vehicle's power battery in the future driving distance based on the traffic information; correcting the current control torque of the vehicle's engine and the current control torque of the motor based on the change amount of the SOC to obtain a corrected control torque of the engine and a corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid power system of the vehicle. The present invention can correct the control mode of the hybrid power system in real time according to traffic information, enabling the vehicle to adapt to different working conditions, improving the working efficiency of the hybrid power system, and thus reducing the fuel consumption of the vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid vehicles, and in particular to a control method, device and vehicle for a hybrid system. Background Art

[0002] The control strategy of hybrid vehicles, especially the core technology of energy management strategy, needs to be continuously improved. Most of the current energy management strategies are implemented based on fixed calibration values in the controller and cannot be flexibly changed according to real-time working conditions or upcoming working conditions, resulting in poor adaptability of the vehicle to different working conditions and increasing the fuel consumption of the vehicle. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention provides a control method, device and vehicle for a hybrid system.

[0004] The present invention provides a control method for a hybrid system, including:

[0005] Obtaining traffic information in the future driving distance of the vehicle;

[0006] Determining the SOC change amount of the power battery of the vehicle in the future driving distance based on the traffic information;

[0007] Based on the SOC change amount, correcting the current control torque of the engine and the current control torque of the motor of the vehicle to obtain a corrected control torque of the engine and a corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid system of the vehicle.

[0008] According to the control method for a hybrid system provided by the present invention, the determining the SOC change amount of the power battery of the vehicle in the future driving distance based on the traffic information includes:

[0009] Determining the vehicle speed of the vehicle in the future driving distance and the slope data of the future driving distance based on the traffic information;

[0010] Determining the SOC change amount of the power battery in the future driving distance based on the vehicle speed of the vehicle in the future driving distance, the slope data of the future driving distance and the current vehicle weight of the vehicle.

[0011] According to the control method for a hybrid system provided by the present invention, the determining the SOC change amount of the power battery in the future driving distance based on the vehicle speed of the vehicle in the future driving distance, the slope data of the future driving distance and the current vehicle weight of the vehicle includes:

[0012] Determine the required torque of the vehicle during the future driving distance based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight;

[0013] Determine the motor torque of the vehicle during the future driving distance based on the required torque of the vehicle during the future driving distance;

[0014] Based on the motor torque of the vehicle during the future driving distance and the vehicle speed during the future driving distance, determine the change in SOC of the power battery during the future driving distance.

[0015] According to the hybrid system control method provided by the present invention, the determining the motor torque of the vehicle during the future driving distance based on the required torque of the vehicle during the future driving distance includes:

[0016] Based on the preset correspondence between the required torque and the torque ratio, determine the torque ratio corresponding to the required torque of the vehicle during the future driving distance as the target torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque;

[0017] Determine the motor torque of the vehicle during the future driving distance based on the target torque ratio and the required torque of the vehicle during the future driving distance.

[0018] According to the hybrid system control method provided by the present invention, the preset correspondence between the required torque and the torque ratio is obtained through the following steps:

[0019] When the required torque takes different values, respectively determine the torque ratio corresponding to the required torque based on the sum of the fuel consumption corresponding to the engine torque and the equivalent fuel consumption corresponding to the motor torque.

[0020] According to the hybrid system control method provided by the present invention, the correcting the current control torque of the engine and the current control torque of the motor of the vehicle based on the SOC change amount to obtain the corrected control torque of the engine and the corrected control torque of the motor includes:

[0021] Correct the current SOC of the power battery based on the SOC change amount to obtain the corrected SOC;

[0022] Reallocate the current required torque of the vehicle based on the corrected SOC to obtain the corrected control torque of the engine and the corrected control torque of the motor.

[0023] According to the hybrid power system control method provided by the present invention, redistributing the current required torque of the vehicle based on the corrected SOC to obtain the corrected control torque of the engine and the corrected control torque of the motor includes:

[0024] Determining the driving mode of the vehicle based on the corrected SOC and the current required torque of the vehicle;

[0025] When the driving mode meets the preset mode, determining the torque ratio corresponding to the current required torque of the vehicle based on the corresponding relationship between the preset required torque and the torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque;

[0026] Updating the motor torque correction coefficient based on the corrected SOC;

[0027] Determining the corrected control torque of the engine and the corrected control torque of the motor based on the torque ratio corresponding to the current required torque of the vehicle and the updated result of the motor torque correction coefficient.

[0028] The present invention also provides a hybrid power system control device, including:

[0029] A data acquisition module for acquiring traffic information during the future driving distance of the vehicle;

[0030] A first calculation module for determining the SOC change amount of the power battery of the vehicle during the future driving distance based on the traffic information;

[0031] A second calculation module for correcting the current control torque of the engine and the current control torque of the motor of the vehicle based on the SOC change amount to obtain the corrected control torque of the engine and the corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid power system of the vehicle.

[0032] The present invention also provides a vehicle, including: a hybrid power system and a controller;

[0033] Wherein, the hybrid power system includes an engine, a motor, a clutch and a gearbox; the motor is arranged between the clutch and the gearbox, and the motor is connected to the input shaft of the gearbox;

[0034] The controller is used to execute the hybrid power system control method as described in any one of the above.

[0035] The present invention also provides an electronic device, including a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor realizes the hybrid power system control method as described in any one of the above when executing the program.

[0036] The present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the hybrid power system control method described in any one of the above is implemented.

[0037] The hybrid power system control method, device and vehicle provided by the present invention obtain traffic information in the future driving distance of the vehicle, determine the change amount of the SOC of the power battery of the vehicle in the future driving distance based on the traffic information, and correct the current control torque of the engine and the current control torque of the motor of the vehicle based on the change amount of the SOC to obtain the corrected control torque of the engine and the corrected control torque of the motor, so as to control the hybrid power system of the vehicle through the corrected control torque of the engine and the corrected control torque of the motor, thereby being able to correct the control mode of the hybrid power system in real time according to the traffic information, enabling the vehicle to adapt to different working conditions, improving the working efficiency of the hybrid power system, and further reducing the fuel consumption of the vehicle. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 is a schematic flow chart of the hybrid power system control method provided by the present invention;

[0040] Figure 2 is a schematic flow chart of determining the change amount of the SOC of the power battery in the future driving distance provided by the present invention;

[0041] Figure 3 is a schematic flow chart of determining the torque ratio corresponding to the required torque provided by the present invention;

[0042] Figure 4 is a schematic diagram of the corresponding relationship between the data group composed of the required torque and the SOC and the driving mode provided by the present invention;

[0043] Figure 5 is a schematic structural diagram of the hybrid power system control device provided by the present invention;

[0044] Figure 6 is a schematic structural diagram of the electronic device provided by the present invention. Detailed Embodiments

[0045] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] The following Figures 1 to 4 describes the control method of the hybrid power system of the present invention. The control method of the hybrid power system of the present invention is executed by electronic devices such as a controller or the hardware and / or software therein. The controller can be the controller of the vehicle itself or a newly added controller, and can be specifically set according to actual needs. As Figure 1 shown, the control method of the hybrid power system of the present invention includes:

[0047] S101. Obtain traffic information during the future driving distance of the vehicle.

[0048] Specifically, the vehicle is a vehicle adopting a P (Position) 2 type hybrid power system, such as a commercial vehicle. Among them, the hybrid power system can be divided into multiple types such as P0, P1, P2, P3, P4, etc. according to the position of the motor. The P2 type hybrid power system includes an engine, a motor, a clutch and a gearbox. Among them, the motor is arranged between the clutch and the gearbox, and the motor is rigidly connected to the input shaft of the gearbox.

[0049] The traffic information during the future driving distance of the vehicle can be obtained through a high-precision map. For example, it can include the slope, turning radius, traffic lights, congestion status, speed limit status, etc. during the future driving distance. It can be understood that the traffic information can also include meteorological data during the future driving distance, such as the concentration of fog, rainfall, etc., and the meteorological data can be obtained through roadside equipment.

[0050] S102. Determine the change amount of the SOC (State Of Charge) of the power battery of the vehicle during the future driving distance based on the traffic information.

[0051] Specifically, the specific manner of determining the SOC change amount of the vehicle's power battery during the future driving distance based on the traffic information during the future driving distance of the vehicle can be set according to actual requirements. For example, the vehicle speed during the future driving distance of the vehicle and the required torque during the future driving distance of the vehicle can be determined based on the traffic information during the future driving distance of the vehicle. By allocating the engine torque and the motor torque, the motor torque of the vehicle during the future driving distance is obtained, and the SOC change amount of the power battery during the future driving distance of the vehicle is determined based on the motor torque of the vehicle during the future driving distance and the vehicle speed of the vehicle during the future driving distance.

[0052] S103. Modify the current control torque of the vehicle's engine and the current control torque of the motor based on the SOC change amount to obtain a modified control torque of the engine and a modified control torque of the motor; wherein, the modified control torque of the engine and the modified control torque of the motor are used to control the hybrid system of the vehicle.

[0053] Specifically, the current control torque of the vehicle's engine is the control torque of the vehicle's engine at the current moment, and the current control torque of the vehicle's motor is the control torque of the vehicle's motor at the current moment. The current control torque of the vehicle's engine and the current control torque of the motor can be obtained by allocating the current required torque of the vehicle (i.e., the required torque of the vehicle at the current moment). The current required torque of the vehicle can be obtained based on information such as the depth of the driver's accelerator pedal at the current moment, the vehicle speed of the vehicle at the current moment, and the vehicle weight.

[0054] The specific manner of allocating the current required torque of the vehicle to obtain the current control torque of the engine and the current control torque of the motor can be set according to actual requirements. For example, the current required torque can be allocated based on the current required torque of the vehicle, the current SOC of the power battery, and the current vehicle speed of the vehicle.

[0055] The specific method of modifying the current control torque of the vehicle's engine and the current control torque of the motor based on the SOC change amount can be set according to actual requirements. For example, the current SOC of the power battery can be modified based on the SOC change amount to obtain a modified SOC, and the current required torque of the vehicle can be re-allocated based on the modified SOC to obtain a modified control torque of the engine and a modified control torque of the motor, so as to control the hybrid system of the vehicle through the modified control torque of the engine and the modified control torque of the motor.

[0056] Traditional methods usually control the hybrid system of the vehicle based on fixed calibration values in the controller, and cannot flexibly change the control mode of the hybrid system according to real-time working conditions or upcoming working conditions, resulting in poor adaptability of the vehicle to different working conditions and a significant increase in the fuel consumption of the vehicle.

[0057] In an embodiment of the present invention, by obtaining traffic information during a vehicle's future driving distance, determining the change in the state of charge (SOC) of the vehicle's power battery during the future driving distance based on the traffic information, and correcting the current control torque of the vehicle's engine and the current control torque of the motor based on the change in SOC, a corrected control torque for the engine and a corrected control torque for the motor are obtained, so as to control the vehicle's hybrid power system through the corrected control torque of the engine and the corrected control torque of the motor. Thus, the control mode of the hybrid power system can be corrected in real time according to the traffic information, enabling the vehicle to adapt to different working conditions, improving the working efficiency of the hybrid power system, and further reducing the vehicle's fuel consumption.

[0058] Based on the above embodiment, determining the change in the SOC of the vehicle's power battery during the future driving distance based on the traffic information includes:

[0059] Determining the vehicle speed during the future driving distance and the slope data of the future driving distance based on the traffic information;

[0060] Determining the change in the SOC of the power battery during the future driving distance based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle.

[0061] Specifically, the specific method for determining the vehicle speed during the vehicle's future driving distance based on the traffic information can be set according to actual needs. For example, the predicted vehicle speed during the future driving distance can be determined based on the vehicle weight at the current moment, the slope, turning radius, traffic lights, congestion status, etc. during the future driving distance, and the predicted vehicle speed during the future driving distance can be corrected according to the speed limit during the future driving distance. For example, when the predicted vehicle speed is greater than the speed limit, the speed limit during the future driving distance is used as the vehicle speed during the future driving distance; otherwise, the predicted vehicle speed is used as the vehicle speed during the future driving distance.

[0062] The specific method for determining the change in the SOC of the power battery during the future driving distance based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle can be set according to actual needs. For example, the required torque during the future driving distance of the vehicle can be determined based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle; the required torque during the future driving distance of the vehicle is allocated to obtain the engine torque and the motor torque during the future driving distance of the vehicle; and the change in the SOC of the power battery during the future driving distance can be determined according to the motor torque during the future driving distance of the vehicle and the vehicle speed during the future driving distance of the vehicle.

[0063] In an embodiment of the present invention, based on traffic information, the vehicle speed during the future driving distance and the slope data of the future driving distance are determined, and based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight, the SOC change amount of the power battery during the future driving distance is determined, which can quickly and accurately predict the SOC change amount of the power battery during the future driving distance. Furthermore, based on the SOC change amount of the power battery during the future driving distance, the current control torque of the engine and the current control torque of the motor can be effectively corrected, achieving the maximum improvement in the working efficiency of the hybrid power system.

[0064] Based on any of the above embodiments, the determining of the SOC change amount of the power battery during the future driving distance based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle includes:

[0065] Based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle, determine the required torque of the vehicle during the future driving distance;

[0066] Based on the required torque of the vehicle during the future driving distance, determine the motor torque of the vehicle during the future driving distance;

[0067] Based on the motor torque of the vehicle during the future driving distance and the vehicle speed during the future driving distance, determine the SOC change amount of the power battery during the future driving distance.

[0068] Specifically, the specific method for determining the required torque of the vehicle during the future driving distance based on the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight can be set according to actual needs. For example, according to the correspondence between the data group composed of the preset vehicle speed, slope, and vehicle weight and the required torque, the vehicle speed during the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle can be matched to obtain the required torque of the vehicle during the future driving distance. Among them, the correspondence between the data group composed of the preset vehicle speed, slope, and vehicle weight and the required torque can be obtained through offline calculation. For example, when the vehicle speed, slope, and vehicle weight take different values, the vehicle speed is respectively input into the PID driver model to calculate the throttle pedal depth in reverse through the PID driver model to obtain the predicted value of the throttle pedal depth. Then, the predicted value of the throttle pedal depth, slope, and vehicle weight are input into the vehicle longitudinal dynamics model, and the required torque corresponding to the data group composed of the vehicle speed, slope, and vehicle weight can be obtained. The correspondence between the data group composed of the vehicle speed, slope, and vehicle weight and the required torque can be written into the controller, so that during the process of determining the required torque of the vehicle during the future driving distance, the calculation efficiency can be effectively improved, the real-time performance of correcting the current control torque of the engine and the current control torque of the motor is ensured, and further the working efficiency of the hybrid power system is improved, and the effective reduction of vehicle fuel consumption is achieved.

[0069] After obtaining the required torque of the vehicle during the future driving distance, the required torque of the vehicle during the future driving distance can be further allocated to obtain the motor torque of the vehicle during the future driving distance. During the process of allocating the required torque during the future driving distance, the efficiency range of the motor during the charge and discharge of the power battery, the engine efficiency range, and the gear shifting law of the transmission can be comprehensively considered. Among them, the correspondence between different required torques and the motor torque can be calculated offline and written into the controller, so that during the process of determining the motor torque of the vehicle during the future driving distance based on the required torque of the vehicle during the future driving distance, the calculation efficiency can be effectively improved. It should be noted that the motor torque can be a positive torque or a negative torque. A positive torque represents that the motor is in the driving state, and a negative torque represents that the motor is in the power generation state.

[0070] After obtaining the motor torque of the vehicle in the future driving distance, the SOC change amount of the power battery in the future driving distance can be determined according to the motor torque of the vehicle in the future driving distance and the vehicle speed of the vehicle in the future driving distance. The specific method for determining the SOC change amount of the power battery in the future driving distance can be set according to actual needs. For example, the discharge amount of the power battery can be determined according to the motor torque of the vehicle in the future driving distance, and the recovered electric quantity, that is, the charging amount of the power battery, can be determined according to the vehicle speed of the vehicle in the future driving distance. Thus, the SOC change amount of the power battery in the future driving distance can be obtained according to the discharge amount and the charging amount of the power battery. It should be noted that the SOC change amount can be positive or negative. When the SOC change amount is positive, it means that the power battery is charged during the future driving distance and the SOC increases; when the SOC change amount is negative, it means that the power battery is discharged during the future driving distance and the SOC decreases.

[0071] As an optional implementation manner, the schematic flow chart for determining the SOC change amount of the power battery in the future driving distance is as Figure 2 shown, and includes:

[0072] Based on the vehicle speed of the vehicle in the future driving distance, the slope data of the future driving distance, and the current vehicle weight of the vehicle, the required torque of the vehicle in the future driving distance is determined through the PID driver model and the vehicle longitudinal mechanical model;

[0073] The required torque of the vehicle in the future driving distance is input into the torque distribution model of the engine and the motor to obtain the motor torque of the vehicle in the future driving distance;

[0074] The motor torque of the vehicle in the future driving distance and the vehicle speed of the vehicle in the future driving distance are input into the SOC calculation model to obtain the SOC change amount of the power battery in the future driving distance.

[0075] In the embodiment of the present invention, the calculation process of the SOC change amount of the power battery in the future driving distance is simple and efficient, which can effectively improve the effectiveness and real-time performance of the calculation result of the SOC change amount. Thus, the current control torque of the engine and the current control torque of the motor can be effectively corrected according to the SOC change amount, realizing the maximum improvement of the working efficiency of the hybrid power system.

[0076] Based on any of the above embodiments, the determining the motor torque of the vehicle in the future driving distance based on the required torque of the vehicle in the future driving distance includes:

[0077] Based on the preset correspondence between the required torque and the torque ratio, determine the torque ratio corresponding to the required torque of the vehicle during the future driving distance as the target torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque.

[0078] Based on the target torque ratio and the required torque of the vehicle during the future driving distance, determine the motor torque of the vehicle during the future driving distance.

[0079] Specifically, the torque ratio is the ratio of the engine torque to the motor torque. The preset correspondence between the required torque and the torque ratio means the pre-set correspondence between the required torque and the torque ratio. Among them, the preset correspondence between the required torque and the torque ratio can be determined according to empirical values, or the torque ratios corresponding to different values of the required torque can be calculated according to the preset torque distribution scheme to obtain the correspondence between the required torque and the torque ratio, and this correspondence is stored in the controller for real-time call.

[0080] After obtaining the required torque of the vehicle during the future driving distance, the required torque of the vehicle during the future driving distance can be matched according to the preset correspondence between the required torque and the torque ratio to obtain the torque ratio corresponding to the required torque of the vehicle during the future driving distance, that is, the target torque ratio.

[0081] According to the target torque ratio, the distribution ratio of the engine torque and the motor torque can be determined, so that the required torque of the vehicle during the future driving distance can be distributed according to the target torque ratio, and the motor torque of the vehicle during the future driving distance can be obtained.

[0082] The embodiment of the present invention determines the target torque ratio based on the preset correspondence between the required torque and the torque ratio, and distributes the required torque of the vehicle during the future driving distance based on the target torque ratio, which can effectively improve the calculation efficiency, ensure the real-time correction of the current control torque of the engine and the current control torque of the motor, and further improve the working efficiency of the hybrid power system, realizing the effective reduction of vehicle fuel consumption.

[0083] Based on any of the above embodiments, the preset correspondence between the required torque and the torque ratio is obtained through the following steps:

[0084] When the required torque takes different values, respectively determine the torque ratio corresponding to the required torque based on the sum of the fuel consumption corresponding to the engine torque and the equivalent fuel consumption corresponding to the motor torque.

[0085] Specifically, when the required torque takes different values, a torque ratio can be determined respectively, so as to obtain the torque ratios corresponding to the required torques. Among them, the flow chart of determining the torque ratio corresponding to the required torque is as Figure 3 shown, including:

[0086] S301. Determine the rotational speed of the transmission input shaft; wherein, the rotational speed of the transmission input shaft can be determined by a rotational speed sensor.

[0087] S302. Determine the available torque range of the engine and the available torque range of the motor according to the rotational speed of the transmission input shaft; wherein, according to the rotational speed of the transmission input shaft, the rotational speed of the power source (engine and / or motor) can be determined, and thus, according to the preset correspondence between the engine rotational speed and the engine available torque range, the available torque range of the engine can be obtained, and according to the preset correspondence between the motor rotational speed and the motor available torque range, the available torque range of the motor can be obtained. For example, the output torque range of the motor is -500 to 500 N·m, and the output torque range of the engine is 0 to 1500 N·m.

[0088] S303. At different torque ratios, calculate the sum of the fuel consumption corresponding to the engine torque and the equivalent fuel consumption corresponding to the motor torque for doing a preset unit of work (for example, one unit of work), that is, the total fuel consumption; that is, traverse different torque ratios, and calculate the corresponding total fuel consumption for each torque ratio; wherein, assuming that the proportion of the engine torque in the required torque is a, then the proportion of the motor torque in the required torque is (1 - a), and the torque ratio is a:(1 - a); the equivalent fuel consumption of the electric energy consumed by the motor torque can be calculated according to the conversion efficiency of converting fuel consumption into electric energy, that is, the equivalent fuel consumption corresponding to the motor torque.

[0089] S304. Determine the torque ratio corresponding to the required torque according to the total fuel consumption corresponding to different torque ratios; wherein, the torque ratio corresponding to the lowest total fuel consumption can be used as the torque ratio corresponding to the required torque.

[0090] In the embodiments of the present invention, when the required torque takes different values, based on the sum of the fuel consumption corresponding to the engine torque and the equivalent fuel consumption corresponding to the motor torque respectively, determine the torque ratio corresponding to the required torque, and obtain the correspondence between the required torque and the torque ratio, which can effectively reduce the fuel consumption of the vehicle.

[0091] Based on any of the above embodiments, the method for correcting the current control torque of the engine and the current control torque of the motor of the vehicle based on the SOC change amount to obtain the corrected control torque of the engine and the corrected control torque of the motor includes:

[0092] Correct the current SOC of the power battery based on the SOC change amount to obtain the corrected SOC;

[0093] Re - distribute the current required torque of the vehicle based on the corrected SOC to obtain the corrected control torque of the engine and the corrected control torque of the motor.

[0094] Specifically, the current SOC of the power battery is the actual SOC of the power battery at the current moment; the specific method of correcting the current SOC of the power battery based on the SOC change amount can be set according to actual requirements. For example, the current SOC of the power battery and the SOC change amount can be summed to obtain the corrected SOC.

[0095] After determining the corrected SOC, further redistribute the current required torque of the vehicle based on the corrected SOC to obtain the corrected engine control torque and the corrected motor control torque. Redistributing the current required torque of the vehicle based on the corrected SOC means updating the current SOC of the vehicle to the corrected SOC to redistribute the current required torque of the vehicle and obtain the corrected engine control torque and the corrected motor control torque.

[0096] In the embodiment of the present invention, the current SOC of the power battery is corrected based on the SOC change amount to obtain the corrected SOC, and the current required torque of the vehicle is redistributed based on the corrected SOC to obtain the corrected engine control torque and the corrected motor control torque, which can quickly and effectively correct the engine torque and the motor torque, so that the engine torque and the motor torque can be corrected in real time according to the traffic information in the future driving distance, maximizing the working efficiency of the hybrid system, and thus reducing the vehicle fuel consumption.

[0097] Based on any of the above embodiments, the redistributing the current required torque of the vehicle based on the corrected SOC to obtain the corrected engine control torque and the corrected motor control torque includes:

[0098] Determine the driving mode of the vehicle based on the corrected SOC and the current required torque of the vehicle;

[0099] When the driving mode meets the preset mode, determine the torque ratio corresponding to the current required torque of the vehicle based on the corresponding relationship between the preset required torque and the torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque;

[0100] Update the motor torque correction coefficient based on the corrected SOC;

[0101] Determine the corrected engine control torque and the corrected motor control torque based on the torque ratio corresponding to the current required torque of the vehicle and the updated result of the motor torque correction coefficient.

[0102] Specifically, the driving modes of the vehicle can be driving while charging, assisting driving, engine driving, and pure electric driving. Driving while charging means that the engine provides the required torque of the vehicle, and at the same time, the engine charges the power battery. Assisting driving means that the engine and the motor provide the required torque of the vehicle simultaneously. Engine driving means that the engine provides the required torque of the vehicle, and the engine pauses charging the power battery. Pure electric driving means that the motor provides the required torque of the vehicle. The specific method for determining the driving mode of the vehicle based on the corrected SOC and the current required torque of the vehicle can be set according to actual needs. For example, the current required torque of the vehicle and the corrected SOC of the power battery can be matched according to the correspondence between the data set of the preset required torque and SOC and the driving mode to determine the driving mode of the vehicle at the current moment. Among them, as an optional implementation manner, the correspondence between the data set of the preset required torque and SOC and the driving mode can be as Figure 4 shown. Figure 4 In Figure 4 , driving while charging, assisting driving, engine driving, and pure electric driving all belong to the hybrid mode.

[0103] After determining the driving mode of the vehicle, the current required torque of the vehicle can be further allocated according to the driving mode. The preset mode can be a mode that requires both the engine and the motor to participate in vehicle driving. For example, it can include driving while charging and assisting driving. If the driving mode of the vehicle does not meet the preset mode, for example, the driving mode of the vehicle is engine driving or pure electric driving, then the corrected control torque of the engine and the corrected control torque of the motor are directly determined according to the required torque of the vehicle. If the driving mode of the vehicle is engine driving, the corrected control torque of the engine is equal to the current required torque of the vehicle, and the corrected control torque of the motor is zero. If the driving mode of the vehicle is pure electric driving, the corrected control torque of the engine is zero, and the corrected control torque of the motor is equal to the current required torque of the vehicle.

[0104] If the driving mode of the vehicle meets the preset mode, the torque ratio corresponding to the current required torque of the vehicle, that is, the ratio of the engine torque to the motor torque, can be determined based on the correspondence between the preset required torque and the torque ratio. At the same time, the motor torque correction coefficient can also be updated based on the corrected SOC. Among them, the corrected SOC can be matched according to the correspondence between the preset SOC and the motor torque correction coefficient to obtain the motor torque correction coefficient corresponding to the corrected SOC, and the motor torque correction coefficient corresponding to the corrected SOC is used as the updated result of the motor torque correction coefficient. The motor torque correction coefficient is strongly correlated with the SOC. The larger the SOC, the larger the motor torque correction coefficient, so as to use the motor drive as much as possible when the SOC is relatively high. For example, when the SOC is relatively small (for example, 20%), the motor torque correction coefficient can be set to 0.1.

[0105] After determining the torque ratio corresponding to the current required torque of the vehicle and the update result of the motor torque correction coefficient, the motor correction control torque can be determined according to the torque ratio corresponding to the current required torque of the vehicle and the update result of the motor torque correction coefficient. For example, the initial value of the motor torque can be determined according to the torque ratio corresponding to the current required torque; the initial value of the motor torque is corrected according to the update result of the motor torque correction coefficient, and the motor correction control torque can be obtained. The difference between the current required torque of the vehicle and the motor correction control torque is the engine correction control torque. Among them, the specific method of correcting the initial value of the motor torque based on the update result of the motor torque correction coefficient can be set according to actual needs. For example, the initial value of the motor torque can be directly multiplied by the update result of the motor torque correction coefficient to obtain the motor correction control torque. It is also possible to adjust the multiplication result according to the preset motor torque value range after multiplying the initial value of the motor torque by the update result of the motor torque correction coefficient to obtain the motor correction control torque.

[0106] In the embodiment of the present invention, the driving mode of the vehicle is determined based on the corrected SOC and the current required torque of the vehicle. When the driving mode meets the preset mode, the torque ratio corresponding to the current required torque of the vehicle is determined based on the corresponding relationship between the preset required torque and the torque ratio. At the same time, the motor torque correction coefficient is updated based on the corrected SOC, so as to determine the engine correction control torque and the motor correction control torque according to the torque ratio corresponding to the current required torque of the vehicle and the update result of the motor torque correction coefficient, which can update the energy management strategy of the hybrid power system by combining the SOC and the driver's required torque at the same time, so as to maximize the fuel-saving potential of the hybrid power system on the premise of meeting the driver's operation requirements.

[0107] The hybrid power system control device provided by the present invention will be described below. The hybrid power system control device described below can be correspondingly referred to the hybrid power system control method described above. As Figure 5 shown, the hybrid power system control device of the present invention includes:

[0108] A data acquisition module 501, configured to acquire traffic information during the future driving distance of the vehicle;

[0109] A first calculation module 502, configured to determine the SOC change amount of the power battery of the vehicle during the future driving distance based on the traffic information;

[0110] The second calculation module 503 is configured to correct the current control torque of the engine and the current control torque of the motor of the vehicle based on the SOC change amount, so as to obtain a corrected control torque of the engine and a corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid power system of the vehicle.

[0111] Based on the above embodiments, the first calculation module 502 is specifically configured to:

[0112] Determine the vehicle speed in the future driving distance and the slope data of the future driving distance of the vehicle based on the traffic information;

[0113] Determine the SOC change amount of the power battery in the future driving distance based on the vehicle speed in the future driving distance of the vehicle, the slope data of the future driving distance, and the current vehicle weight of the vehicle.

[0114] Based on any of the above embodiments, the first calculation module 502 is specifically configured to:

[0115] Determine the required torque of the vehicle in the future driving distance based on the vehicle speed in the future driving distance of the vehicle, the slope data of the future driving distance, and the current vehicle weight of the vehicle;

[0116] Determine the motor torque of the vehicle in the future driving distance based on the required torque of the vehicle in the future driving distance;

[0117] Determine the SOC change amount of the power battery in the future driving distance based on the motor torque of the vehicle in the future driving distance and the vehicle speed in the future driving distance of the vehicle.

[0118] Based on any of the above embodiments, the first calculation module 502 is specifically configured to:

[0119] Determine the torque ratio corresponding to the required torque of the vehicle in the future driving distance based on the preset corresponding relationship between the required torque and the torque ratio as the target torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque;

[0120] Determine the motor torque of the vehicle in the future driving distance based on the target torque ratio and the required torque of the vehicle in the future driving distance.

[0121] Based on any of the above embodiments, a third calculation module is further included, and the third calculation module is configured to:

[0122] When the required torque takes different values, respectively determine the torque ratio corresponding to the required torque based on the sum of the fuel consumption corresponding to the engine torque and the equivalent fuel consumption corresponding to the motor torque.

[0123] Based on any of the above embodiments, the second calculation module 503 is specifically configured to:

[0124] Correct the current SOC of the power battery based on the SOC change amount to obtain a corrected SOC;

[0125] Reallocate the current required torque of the vehicle based on the corrected SOC to obtain the corrected control torque of the engine and the corrected control torque of the motor.

[0126] Based on any of the above embodiments, the second calculation module 503 is specifically configured to:

[0127] Determine the driving mode of the vehicle based on the corrected SOC and the current required torque of the vehicle;

[0128] When the driving mode meets the preset mode, determine the torque ratio corresponding to the current required torque of the vehicle based on the corresponding relationship between the preset required torque and the torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque;

[0129] Update the motor torque correction coefficient based on the corrected SOC;

[0130] Determine the corrected control torque of the engine and the corrected control torque of the motor based on the torque ratio corresponding to the current required torque of the vehicle and the updated result of the motor torque correction coefficient.

[0131] The present invention also provides a vehicle, including: a hybrid power system and a controller;

[0132] Wherein, the hybrid power system includes an engine, a motor, a clutch and a gearbox; the motor is arranged between the clutch and the gearbox, and the motor is connected to the input shaft of the gearbox;

[0133] The controller is used to execute the hybrid power system control method described in any of the above embodiments.

[0134] Specifically, the vehicle is a commercial vehicle, such as a truck, a bus, a construction machine, etc. The vehicle includes a hybrid power system and a controller. Wherein, the hybrid power system includes an engine, a motor, a clutch and a gearbox; the motor is arranged between the clutch and the gearbox, and the motor is rigidly connected to the input shaft of the gearbox. That is, the vehicle adopted in the embodiment of the present invention is a P2 type hybrid power system. The controller is used to control the hybrid power system.

[0135] Figure 6 Illustrates a schematic diagram of the physical structure of an electronic device, such as Figure 6 shown. The electronic device may include: a processor 601, a communications interface 602, a memory 603, and a communication bus 604. Among them, the processor 601, the communications interface 602, and the memory 603 communicate with each other through the communication bus 604. The processor 601 may call the logical instructions in the memory 603 to execute the hybrid power system control method, which includes: obtaining traffic information in the future driving distance of the vehicle;

[0136] Determining the SOC change amount of the vehicle's power battery in the future driving distance based on the traffic information;

[0137] Correcting the current control torque of the vehicle's engine and the current control torque of the motor based on the SOC change amount to obtain the corrected control torque of the engine and the corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid power system of the vehicle.

[0138] In addition, when the logical instructions in the above-mentioned memory 603 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0139] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the hybrid power system control method provided by the above-mentioned various methods. The method includes: obtaining traffic information in the future driving distance of the vehicle;

[0140] Determining the SOC change amount of the vehicle's power battery in the future driving distance based on the traffic information;

[0141] Based on the change in the state of charge (SOC), the current control torque of the vehicle's engine and the current control torque of the motor are corrected to obtain the corrected control torque of the engine and the corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid power system of the vehicle.

[0142] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is configured to execute the hybrid power system control method provided above, and the method includes: obtaining traffic information during the future driving distance of the vehicle;

[0143] Based on the traffic information, determining the change in the state of charge (SOC) of the vehicle's power battery during the future driving distance;

[0144] Based on the change in the state of charge (SOC), the current control torque of the vehicle's engine and the current control torque of the motor are corrected to obtain the corrected control torque of the engine and the corrected control torque of the motor; wherein, the corrected control torque of the engine and the corrected control torque of the motor are used to control the hybrid power system of the vehicle.

[0145] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

[0146] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the above technical solution, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A control method for a hybrid power system, characterized in that, Including: Obtain traffic information during the future driving distance of the vehicle; Determine the change in State of Charge (SOC) of the vehicle's power battery during the future driving distance based on the traffic information; Correct the current SOC of the power battery based on the SOC change amount to obtain a corrected SOC; Re - allocate the current required torque of the vehicle based on the corrected SOC to obtain an engine corrected control torque and a motor corrected control torque; wherein, the engine corrected control torque and the motor corrected control torque are used to control the vehicle's hybrid power system; The re - allocation of the current required torque of the vehicle based on the corrected SOC to obtain an engine corrected control torque and the motor corrected control torque includes: Determine the driving mode of the vehicle based on the corrected SOC and the current required torque of the vehicle; When the driving mode meets the preset mode, determine the torque ratio corresponding to the current required torque of the vehicle based on the preset correspondence between the required torque and the torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque; Update the motor torque correction coefficient based on the corrected SOC; Determine the engine corrected control torque and the motor corrected control torque based on the torque ratio corresponding to the current required torque of the vehicle and the updated result of the motor torque correction coefficient.

2. The hybrid system control method according to claim 1, wherein The determination of the change in SOC of the vehicle's power battery during the future driving distance based on the traffic information includes: Determine the vehicle speed during the future driving distance of the vehicle and the slope data of the future driving distance based on the traffic information; Determine the change in SOC of the power battery during the future driving distance based on the vehicle speed during the future driving distance of the vehicle, the slope data of the future driving distance, and the current vehicle weight of the vehicle.

3. The hybrid system control method according to claim 2, wherein The determination of the change in SOC of the power battery during the future driving distance based on the vehicle speed during the future driving distance of the vehicle, the slope data of the future driving distance, and the current vehicle weight of the vehicle includes: Determine the required torque of the vehicle during the future driving distance based on the vehicle speed during the future driving distance of the vehicle, the slope data of the future driving distance, and the current vehicle weight of the vehicle; Determine the motor torque of the vehicle during the future driving distance based on the required torque of the vehicle during the future driving distance; Determine the change in SOC of the power battery during the future driving distance based on the motor torque of the vehicle during the future driving distance and the vehicle speed during the future driving distance of the vehicle.

4. The hybrid system control method according to claim 3, wherein The determination of the motor torque of the vehicle during the future driving distance based on the required torque of the vehicle during the future driving distance includes: Determine the torque ratio corresponding to the required torque of the vehicle during the future driving distance as the target torque ratio based on the preset correspondence between the required torque and the torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque; Determine the motor torque of the vehicle during the future driving distance based on the target torque ratio and the required torque of the vehicle during the future driving distance.

5. The hybrid system control method according to claim 4, wherein, The corresponding relationship between the preset required torque and the torque ratio is obtained through the following steps: When the required torque takes different values, respectively determine the torque ratio corresponding to the required torque based on the sum of the fuel consumption corresponding to the engine torque and the equivalent fuel consumption corresponding to the motor torque.

6. A hybrid system control device, characterized in that, Including: A data acquisition module for acquiring traffic information during the future driving distance of the vehicle; A first calculation module for determining the change in the state of charge (SOC) of the vehicle's power battery during the future driving distance based on the traffic information; A second calculation module for correcting the current SOC of the power battery based on the change in SOC to obtain a corrected SOC; Reallocate the current required torque of the vehicle based on the corrected SOC to obtain a corrected engine control torque and a corrected motor control torque; wherein, the corrected engine control torque and the corrected motor control torque are used to control the hybrid power system of the vehicle; The second calculation module is specifically configured to determine the driving mode of the vehicle based on the corrected SOC and the current required torque of the vehicle; when the driving mode meets a preset mode, determine the torque ratio corresponding to the current required torque of the vehicle based on the corresponding relationship between the preset required torque and the torque ratio; wherein, the torque ratio is the ratio of the engine torque to the motor torque; update the motor torque correction coefficient based on the corrected SOC; determine the corrected engine control torque and the corrected motor control torque based on the torque ratio corresponding to the current required torque of the vehicle and the updated result of the motor torque correction coefficient.

7. A vehicle, characterized in that, Including: A hybrid power system and a controller; Wherein, the hybrid power system includes an engine, a motor, a clutch, and a gearbox; the motor is arranged between the clutch and the gearbox, and the motor is connected to the input shaft of the gearbox; The controller is used to execute the hybrid power system control method according to any one of claims 1 to 5.

8. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the hybrid power system control method according to any one of claims 1 to 5.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the hybrid power system control method according to any one of claims 1 to 5.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the hybrid power system control method according to any one of claims 1 to 5 above.

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