Multi-power-source economic power optimization control method, device and equipment and storage medium

Abstract

The invention discloses a multi-power-source economic power optimization control method, device and equipment and a storage medium. The method comprises the steps that the comprehensive efficiency map of a motor gearbox of a current vehicle under different gears is obtained; a target rotating speed and a target torque are obtained, and target efficiency maps of different gears matched with the target rotating speed and the target torque are searched for according to the target rotating speed and the target torque; and the gear of the map where the highest efficiency factor is located is selected from all the target efficiency maps to serve as the target gear, the motor gearbox is controlled at the target gear, economical efficiency optimization of the vehicle can be achieved, the power sources work in the optimal efficiency interval, the dynamic property and economical efficiency of the vehicle with the multiple power sources are improved, and the power efficiency of the vehicle is improved. And the speed and efficiency of multi-power-source economic power optimization control are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile economic optimization, and in particular to a multi-power source economic power optimization control method, device, equipment and storage medium. Background Art

[0002] The vehicle's economic control generally takes the assembly that is most sensitive to economy as the main optimization target. Taking fuel vehicles or pure electric vehicles as examples, the efficiency map of the engine or motor varies in different speed ranges. The preferred economic optimization strategy is generally to ensure that the engine or drive motor operates at a higher efficiency point. Specifically, by adjusting the shifting strategy, the power source operates in the optimal efficiency range.

[0003] In the prior art, generally, the engine or the drive motor is ensured to operate at a more efficient point. Specifically, the shifting strategy is adjusted so that the power system operates in an optimal efficiency range.

[0004] The problems existing in the prior art are:

[0005] 1. The optimal overall efficiency of the engine (or motor) and gearbox is not considered comprehensively;

[0006] 2. For multiple power sources, such as EMT (double power input, double transmission power coupling after shifting), the comprehensive efficiency optimization control for multiple power sources and multiple transmissions is not performed;

[0007] 3. For multiple power inputs, the impact of torque distribution on overall efficiency is not considered. Summary of the invention

[0008] The main purpose of the present invention is to provide a multi-power source economic power optimization control method, device, equipment and storage medium, aiming to solve the technical problems in the prior art that vehicle economic control relies on adjusting the shifting strategy, does not consider the impact of multiple power inputs and torque distribution on the overall efficiency, and the multi-power source efficiency control of the transmitter or motor and gearbox cannot reach the optimal efficiency range, resulting in poor power and economy of vehicles with multiple power sources.

[0009] In a first aspect, the present invention provides a multi-power source economic power optimization control method, the multi-power source economic power optimization control method comprising the following steps:

[0010] Get the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears;

[0011] Obtaining a target speed and a target torque, and searching for a matching target efficiency map for different gears according to the target speed and the target torque;

[0012] A gear position in a map with the highest efficiency factor is selected from each target efficiency map as a target gear position, and the motor gearbox is controlled at the target gear position.

[0013] Optionally, the obtaining of a comprehensive efficiency map of the motor-gearbox of the current vehicle at different gears includes:

[0014] When the multi-power source of the current vehicle is a combination of a motor and a gearbox, obtaining a motor efficiency map of the motor at different gears, and obtaining a gearbox efficiency map of the gearbox at different gears;

[0015] The motor efficiency map and the gearbox efficiency map are superimposed to obtain a comprehensive efficiency map under different gears.

[0016] Optionally, the acquiring the target speed and the target torque, and searching for a matching target efficiency map of different gears according to the target speed and the target torque, includes:

[0017] Obtaining a current optimization scheme, and determining a target speed and a target torque according to the current optimization scheme;

[0018] An efficiency map matching the target speed and the target torque is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0019] Optionally, searching the comprehensive efficiency map for an efficiency map that matches the target speed and the target torque as a target efficiency map for different gears includes:

[0020] Performing exhaustive optimization on the target torque with a preset gradient ranging from 0% to 100% to obtain an optimization group;

[0021] According to the optimization group and the target speed, a matching efficiency map is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0022] Optionally, selecting a gear position of a map with the highest efficiency factor from each target efficiency map as a target gear position, and controlling the motor gearbox at the target gear position includes:

[0023] Select each efficiency factor corresponding to the torque and speed from each target efficiency map, and select the highest efficiency factor from each efficiency factor;

[0024] Selecting the gear position corresponding to the highest value of the efficiency factor from each target efficiency map as the target gear position;

[0025] The motor transmission of the current vehicle is controlled at the target gear position.

[0026] Optionally, controlling the motor gearbox of the current vehicle at the target gear position includes:

[0027] Calculate the heat generation energy of the motor of the current vehicle at the target gear position;

[0028] According to the motor heat energy calculation, the heat accumulation needs to be restored to the target temperature corresponding to the continuous torque output characteristic;

[0029] Allocating corresponding input torque and input speed to the motor and gearbox of the current vehicle according to a preset allocation strategy;

[0030] The motor and the transmission of the current vehicle are controlled to continuously operate at the input torque and the input speed at the target temperature.

[0031] Optionally, the calculating the motor heating energy of the current vehicle at the target gear position includes:

[0032] The motor heating energy of the current vehicle at the target gear is calculated by the following formula:

[0033] J=∫T*Rev / 9.55*(1-η)*δt

[0034] Among them, J is the motor heating energy, T is the motor torque, Rev is the motor speed, 9.55 is the ratio of the motor's rated power to the speed, η is the current motor efficiency obtained according to the current motor efficiency map, and δt is the sampling time step of the motor torque and speed.

[0035] In a second aspect, in order to achieve the above-mentioned purpose, the present invention further proposes a multi-power source economic power optimization control device, the multi-power source economic power optimization control device comprising:

[0036] The efficiency acquisition module is used to obtain the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears;

[0037] A matching module, used to obtain a target speed and a target torque, and to search for a matching target efficiency map of different gears according to the target speed and the target torque;

[0038] The control module is used to select the gear position of the map with the highest efficiency factor from each target efficiency map as the target gear position, and control the motor gearbox at the target gear position.

[0039] In the third aspect, in order to achieve the above-mentioned purpose, the present invention also proposes a multi-power source economic power optimization control device, which includes: a memory, a processor, and a multi-power source economic power optimization control program stored in the memory and executable on the processor, and the multi-power source economic power optimization control program is configured to implement the steps of the multi-power source economic power optimization control method as described above.

[0040] In a fourth aspect, in order to achieve the above-mentioned purpose, the present invention also proposes a storage medium, on which a multi-power source economic power optimization control program is stored, and when the multi-power source economic power optimization control program is executed by a processor, the steps of the multi-power source economic power optimization control method as described above are implemented.

[0041] The multi-power source economical power optimization control method proposed in the present invention obtains the comprehensive efficiency map of the motor transmission of the current vehicle at different gears; obtains the target speed and target torque, and searches for matching target efficiency maps of different gears according to the target speed and target torque; selects the gear of the map with the highest efficiency factor from each target efficiency map as the target gear, and controls the motor transmission at the target gear, so as to achieve the economic optimization of the vehicle, make the power source work in the optimal efficiency range, improve the power and economy of the vehicle with multiple power sources, and improve the speed and efficiency of the economical power optimization control of multiple power sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present invention;

[0043] Figure 2 It is a flow chart of the first embodiment of the multi-power source economic power optimization control method of the present invention;

[0044] Figure 3 It is a flow chart of the second embodiment of the multi-power source economic power optimization control method of the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of multiple power sources in the multi-power source economic power optimization control method;

[0046] Figure 5 It is a schematic diagram of the comprehensive efficiency map in the multi-power source economic power optimization control method;

[0047] Figure 6 It is a flow chart of the third embodiment of the multi-power source economic power optimization control method of the present invention;

[0048] Figure 7 A schematic diagram of the most efficient gear selection in the multi-power source economic power optimization control method of the present invention;

[0049] Figure 8 It is a flow chart of a fourth embodiment of the multi-power source economic power optimization control method of the present invention;

[0050] Fig. 9 It is a functional module diagram of the first embodiment of the multi-power source economic power optimization control device of the present invention.

[0051] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0053] The solution of the embodiment of the present invention is mainly: by obtaining the comprehensive efficiency map of the motor-transmission of the current vehicle at different gears; obtaining the target speed and target torque, and searching for matching target efficiency maps of different gears according to the target speed and target torque; selecting the gear of the map with the highest efficiency factor as the target gear from each target efficiency map, and controlling the motor-transmission at the target gear, the economy of the vehicle can be optimized, the power source works in the optimal efficiency range, the power and economy of the vehicle with multiple power sources are improved, and the speed and efficiency of the economic power optimization control of multiple power sources are improved, which solves the technical problems in the prior art that the vehicle economy control relies on adjusting the shifting strategy, does not consider the influence of multiple power inputs and torque distribution on the comprehensive efficiency, and the efficiency control of multiple power sources of the transmitter or motor and transmission cannot reach the optimal efficiency range, and the power and economy of the vehicle with multiple power sources are poor.

[0054] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the device structure of the hardware operating environment involved in the embodiment of the present invention.

[0055] like Figure 1As shown, the device may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed RAM memory, or it may be a stable memory (Non-Volatile Memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.

[0056] Those skilled in the art will understand that Figure 1 The device structure shown in the figure does not constitute a limitation of the device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0057] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating device, a network communication module, a user interface module, and a multi-power source economic power optimization control program.

[0058] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and performs the following operations:

[0059] Get the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears;

[0060] Obtaining a target speed and a target torque, and searching for a matching target efficiency map for different gears according to the target speed and the target torque;

[0061] A gear position in a map with the highest efficiency factor is selected from each target efficiency map as a target gear position, and the motor gearbox is controlled at the target gear position.

[0062] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0063] When the multi-power source of the current vehicle is a combination of a motor and a gearbox, obtaining a motor efficiency map of the motor at different gears, and obtaining a gearbox efficiency map of the gearbox at different gears;

[0064] The motor efficiency map and the gearbox efficiency map are superimposed to obtain a comprehensive efficiency map under different gears.

[0065] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0066] Obtaining a current optimization scheme, and determining a target speed and a target torque according to the current optimization scheme;

[0067] An efficiency map matching the target speed and the target torque is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0068] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0069] Performing exhaustive optimization on the target torque with a preset gradient ranging from 0% to 100% to obtain an optimization group;

[0070] According to the optimization group and the target speed, a matching efficiency map is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0071] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0072] Select each efficiency factor corresponding to the torque and speed from each target efficiency map, and select the highest efficiency factor from each efficiency factor;

[0073] Selecting the gear position corresponding to the highest value of the efficiency factor from each target efficiency map as the target gear position;

[0074] The motor transmission of the current vehicle is controlled at the target gear position.

[0075] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0076] Calculate the heat generation energy of the motor of the current vehicle at the target gear position;

[0077] According to the motor heat energy calculation, the heat accumulation needs to be restored to the target temperature corresponding to the continuous torque output characteristic;

[0078] Allocating corresponding input torque and input speed to the motor and gearbox of the current vehicle according to a preset allocation strategy;

[0079] The motor and the transmission of the current vehicle are controlled to continuously operate at the input torque and the input speed at the target temperature.

[0080] The device of the present invention calls the multi-power source economic power optimization control program stored in the memory 1005 through the processor 1001, and also performs the following operations:

[0081] The motor heating energy of the current vehicle at the target gear is calculated by the following formula:

[0082] J=∫T*Rev / 9.55*(1-η)*δt

[0083] Among them, J is the motor heating energy, T is the motor torque, Rev is the motor speed, 9.55 is the ratio of the motor's rated power to the speed, η is the current motor efficiency obtained according to the current motor efficiency map, and δt is the sampling time step of the motor torque and speed.

[0084] Through the above scheme, this embodiment obtains the comprehensive efficiency map of the motor-transmission of the current vehicle at different gears; obtains the target speed and target torque, and searches for matching target efficiency maps of different gears according to the target speed and target torque; selects the gear of the map with the highest efficiency factor from each target efficiency map as the target gear, and controls the motor-transmission at the target gear, so as to achieve the economic optimization of the vehicle, make the power source work in the optimal efficiency range, improve the power and economy of the vehicle with multiple power sources, and improve the speed and efficiency of the economic power optimization control of multiple power sources.

[0085] Based on the above hardware structure, an embodiment of the multi-power source economic power optimization control method of the present invention is proposed.

[0086] Reference Figure 2 , Figure 2 It is a flow chart of the first embodiment of the multi-power source economic power optimization control method of the present invention.

[0087] In the first embodiment, the multi-power source economic power optimization control method includes the following steps:

[0088] Step S10: Obtain the comprehensive efficiency map of the motor transmission of the current vehicle at different gears.

[0089] It should be noted that the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears is obtained, and the efficiency map is an efficiency mapping lookup table based on rotation speed and torque.

[0090] Step S20: Obtain a target speed and a target torque, and search for a matching target efficiency map of different gears according to the target speed and the target torque.

[0091] It should be understood that after obtaining the target speed and target torque, the efficiency maps of different gears can be retrieved with the target speed and torque as input, that is, the target efficiency maps of different gears that match the target speed and target torque are searched.

[0092] Step S30: Selecting a gear position in a map with the highest efficiency factor from each target efficiency map as a target gear position, and controlling the motor gearbox at the target gear position.

[0093] It can be understood that by obtaining the gear position of the map with the highest efficiency as the current target gear position, the optimal strategy of the motor gearbox shifting strategy can be determined, that is, the motor gearbox is controlled at the target gear position.

[0094] Through the above scheme, this embodiment obtains the comprehensive efficiency map of the motor-transmission of the current vehicle at different gears; obtains the target speed and target torque, and searches for matching target efficiency maps of different gears according to the target speed and target torque; selects the gear of the map with the highest efficiency factor from each target efficiency map as the target gear, and controls the motor-transmission at the target gear, so as to achieve the economic optimization of the vehicle, make the power source work in the optimal efficiency range, improve the power and economy of the vehicle with multiple power sources, and improve the speed and efficiency of the economic power optimization control of multiple power sources.

[0095] Further, Figure 3 FIG. 1 is a flow chart of the second embodiment of the multi-power source economic power optimization control method of the present invention. Figure 3 As shown, based on the first embodiment, a second embodiment of the multi-power source economic power optimization control method of the present invention is proposed. In this embodiment, the step S10 specifically includes the following steps:

[0096] Step S11: when the multi-power source of the current vehicle is a combination of a motor and a gearbox, obtain a motor efficiency map of the motor at different gears, and obtain a gearbox efficiency map of the gearbox at different gears.

[0097] It should be noted that when the current vehicle's multi-power source is a combination of a motor and a gearbox, the efficiency map of the motor and the efficiency map of each gear of the gearbox are obtained separately, and the efficiency map of the motor is brought into the efficiency map of each gear of the gearbox to obtain the map of the motor-gearbox combination under different gears.

[0098] In the specific implementation, see Figure 4 , Figure 4 It is a schematic diagram of the structure of multiple power sources in the multi-power source economic power optimization control method, such as Figure 4As shown, it comprises two drive motors and two gearboxes, which are powered by a coupling mechanism (5); wherein the motors and gearboxes can be independently controlled.

[0099] It should be noted that the motor can be replaced by other power sources, such as an engine; the gearbox can be selected according to the reduction ratio requirements of the vehicle, and can be without a gearbox or with a single-speed gearbox.

[0100] Furthermore, the multi-power source structure is also suitable for electric drive axles (dual-motor single-bridge electric drive axles, or multi-bridge electric drive axles), or distributed drives.

[0101] The motor and gearbox can be controlled separately:

[0102] Motor gearbox 1 (including motor 1 and gearbox 1) and motor gearbox 2 (including motor 2 and gearbox 2) can be controlled separately. Specifically, the gears of gearbox 1 and gearbox 2 can be selected separately, which can be the same gear or different gears; and the input torque of the two motors can be freely distributed.

[0103] Correspondingly, the multi-power source structure is also suitable for the case where gearbox 1 and gearbox 2 can only be in the same gear, and the input torque of the dual motors adopts a specified mode such as equal distribution. In this case, the control method of the system with the multi-power source structure is still on trial, which only affects some optimization strategies of the system and cannot be fully implemented; for example, if the dual power source only supports the equal distribution strategy, it only affects the implementation effect of the torque distribution strategy of the system, but does not affect the economic performance of the shifting strategy.

[0104] Step S12: superimpose the motor efficiency map and the gearbox efficiency map to obtain a comprehensive efficiency map under different gears.

[0105] It can be understood that by superimposing the efficiency maps of the motor and the gearbox at different gears, the comprehensive efficiency map of the motor and the gearbox at different gears can be obtained.

[0106] In the specific implementation, see Figure 5 , Figure 5 This is a schematic diagram of the comprehensive efficiency map in the multi-power source economic power optimization control method, such as Figure 5 As shown, the process of creating the motor-gearbox map is as follows: obtain the efficiency map of the motor and the efficiency map of each gear of the gearbox respectively, and bring the efficiency map of the motor into the efficiency map of each gear of the gearbox to obtain the map of the motor-gearbox combination under different gears.

[0107] Through the above scheme, this embodiment obtains the motor efficiency map of the motor at different gears and the gearbox efficiency map of the gearbox at different gears when the multi-power source of the current vehicle is a combination of a motor and a gearbox; superimposes the motor efficiency map and the gearbox efficiency map to obtain a comprehensive efficiency map under different gears; and can achieve economic optimization of the vehicle and make the power source work in the optimal efficiency range.

[0108] Further, Figure 6 FIG. 1 is a flow chart of a third embodiment of the multi-power source economic power optimization control method of the present invention. Figure 6 As shown, a third embodiment of the multi-power source economic power optimization control method of the present invention is proposed based on the first embodiment. In this embodiment, the step S20 specifically includes the following steps:

[0109] Step S21, obtaining a current optimization scheme, and determining a target speed and a target torque according to the current optimization scheme.

[0110] It should be noted that the current optimization scheme is a scheme for optimizing the economic power control of the current vehicle. According to the current optimization scheme, the speed and torque required for the motor and gearbox of the current vehicle, that is, the target speed and target torque, can be determined.

[0111] Step S22: searching the comprehensive efficiency map for an efficiency map that matches the target speed and the target torque as a target efficiency map for different gears.

[0112] It can be understood that an efficiency map corresponding to the target speed and the target torque can be found in the comprehensive efficiency map as the target efficiency map for different gears.

[0113] Furthermore, the step S22 specifically includes the following steps:

[0114] Performing exhaustive optimization on the target torque with a preset gradient ranging from 0% to 100% to obtain an optimization group;

[0115] According to the optimization group and the target speed, a matching efficiency map is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0116] It should be understood that by exhaustively optimizing the target torque with a preset gradient ranging from 0% to 100%, an optimization group can be obtained, and then a matching efficiency map can be found in the comprehensive efficiency map according to the optimization group and the target speed as the target efficiency map for different gears.

[0117] In the specific implementation, see Figure 7 , Figure 7 FIG. 1 is a schematic diagram of selecting the most efficient gear in the multi-power source economic power optimization control method of the present invention, such as Figure 7 As shown, the comprehensive efficiency map of the motor gearbox at different gears is obtained, and the efficiency map is an efficiency lookup table based on speed and torque; the target speed and torque are used as input to look up the efficiency maps of different gears; the map with the highest efficiency is used as the current target gear; the most efficient gear selection of the motor gearbox is obtained, and the comprehensive efficiency of different gears is looked up according to the target torque and target speed, and the gear with the highest efficiency is used as the target gear.

[0118] It can be understood that the motor-gearbox torque distribution process is as follows: let the driver's requested torque be DrvReqTrq, the requested torque of motor-gearbox 1 be Ta, and the requested torque of motor-gearbox 2 be Tb; the efficiency map of the motor-gearbox has been obtained; according to the requested torques T1 and T2, combined with the current motor speed, the efficiency η corresponding to the requested torque can be obtained by checking the motor-gearbox efficiency map 1、 η 2。

[0119] The requested torque DrvReqTrq is optimized exhaustively with a certain gradient from 0% to 100%, specifically:

[0120] Exhaustively search for the optimal group of motor gearbox 1, including target torque and target efficiency:

[0121] T 1a η 1a；

[0122] T 1b η 1b ;

[0123] T 1c η 1c ;

[0124] T 1d η 1d ;

[0125] T 1e η 1e ; ...

[0127] The optimal group of motor gearbox 2 is obtained synchronously, including target torque and target efficiency:

[0128] T 2a η 2a ;

[0129] T 2b η 2b ;

[0130] T 2c η 2c;

[0131] T 2d η 2d ;

[0132] T 2e η 2e ; ...

[0134] Among them, T 1a+ T 2a＝ DrvReqTrq

[0135] Take the most efficient point in the exhaustive array as the allocation strategy:

[0136] Min[(T 1a +T 2a )η 1a η 2a / ((T 1a η 2a+ T 2a η 1a ),(T 1b +T 2b )η 1b η 2b / ((T 1b η 2b+ T 2b η 1b )....]

[0137] This embodiment adopts the above scheme, obtains the current optimization scheme, determines the target speed and target torque according to the current optimization scheme; searches the efficiency map that matches the target speed and the target torque in the comprehensive efficiency map as the target efficiency map for different gears, thereby optimizing the economy of the vehicle, making the power source work in the optimal efficiency range, and improving the power and economy of the vehicle with multiple power sources.

[0138] Further, Figure 8 FIG. 4 is a flow chart of a fourth embodiment of a multi-power source economic power optimization control method according to the present invention. Figure 8 As shown, a fourth embodiment of the multi-power source economic power optimization control method of the present invention is proposed based on the first embodiment. In this embodiment, the step S30 specifically includes the following steps:

[0139] Step S31: Select various efficiency factors corresponding to torque and speed from various target efficiency maps, and select the highest efficiency factor from among the various efficiency factors.

[0140] It should be noted that various efficiency factors corresponding to torque and speed can be selected from various target efficiency maps, and by comparing the sizes of various efficiency factors, the highest efficiency factor value can be selected from various efficiency factors.

[0141] Step S32: Selecting a gear position corresponding to the highest value of the efficiency factor from each target efficiency map as the target gear position.

[0142] It can be understood that the gear corresponding to the highest value of the efficiency factor is selected from each target efficiency map and used as the target gear.

[0143] Step S33: controlling the motor gearbox of the current vehicle at the target gear position.

[0144] It should be understood that the motor transmission of the current vehicle can be controlled at the target gear position.

[0145] Furthermore, the step S33 specifically includes the following steps:

[0146] Calculate the heat generation energy of the motor of the current vehicle at the target gear position;

[0147] According to the motor heat energy calculation, the heat accumulation needs to be restored to the target temperature corresponding to the continuous torque output characteristic;

[0148] Allocating corresponding input torque and input speed to the motor and gearbox of the current vehicle according to a preset allocation strategy;

[0149] The motor and the transmission of the current vehicle are controlled to continuously operate at the input torque and the input speed at the target temperature.

[0150] It should be understood that the heat generation energy of the motor of the current vehicle at the target gear is calculated, and based on the heat generation energy of the motor, the target temperature at which the heat accumulation needs to be restored to the continuous torque output characteristic can be calculated. According to a pre-set allocation strategy, the corresponding input torque and input speed can be allocated to the motor and gearbox of the current vehicle; and then the motor and gearbox of the current vehicle are controlled to continue operating at the input torque and the input speed at the target temperature.

[0151] Furthermore, the step of calculating the motor heating energy of the current vehicle at the target gear position specifically includes the following steps:

[0152] The motor heating energy of the current vehicle at the target gear is calculated by the following formula:

[0153] J=∫T*Rev / 9.55*(1-η)*δt

[0154] Among them, J is the motor heating energy, T is the motor torque, Rev is the motor speed, 9.55 is the ratio of the motor's rated power to the speed, η is the current motor efficiency obtained according to the current motor efficiency map, and δt is the sampling time step of the motor torque and speed.

[0155] In the specific implementation, the power optimization control process is: the motor torque output characteristics include continuous torque output capacity and peak torque output capacity, and the peak torque duration is generally about 1 minute; for the dual-motor power source described in this system, this system adopts a control strategy based on thermal management planning to improve the continuous torque capacity.

[0156] Specifically:

[0157] The need to reduce the torque after the peak torque lasts for 1 minute is limited by the cooling system. The continuous torque output capacity is affected by the thermal balance. This system calculates the heat accumulation of the motor system and the heat dissipation of the cooling system.

[0158] Estimate the temperature rise characteristics when the power output exceeds the continuous torque, specifically calculate the heat energy of the motor:

[0159] ∫Motor torque*motor speed / 9.55*(1-η)*δt

[0160] The heat dissipation capacity of the cooling system is used to calculate the temperature required to restore the heat accumulation of the drive system to the temperature corresponding to the continuous torque output characteristic.

[0161] Through the above strategy, a single motor can be made to work beyond the continuous torque for a short time, and then switch to continuous torque operation and dissipate heat to the temperature characteristics corresponding to the continuous torque; at this time, another motor can be controlled to work beyond the continuous torque for a short time; the two motors can be controlled to relay super-continuous torque, which increases the continuous torque output capacity of the dual motors and improves the power.

[0162] This embodiment adopts the above scheme, by selecting each efficiency factor corresponding to the torque and speed from each target efficiency map, selecting the highest efficiency factor from each efficiency factor; selecting the gear corresponding to the highest efficiency factor from each target efficiency map as the target gear; controlling the motor transmission of the current vehicle at the target gear; realizing the economic optimization of the vehicle, making the power source work in the optimal efficiency range, improving the power and economy of the vehicle with multiple power sources, and improving the speed and efficiency of the economic power optimization control of multiple power sources.

[0163] Accordingly, the present invention further provides a multi-power source economic power optimization control device.

[0164] Reference Fig. 9 , Fig. 9 It is a functional module diagram of the first embodiment of the multi-power source economic power optimization control device of the present invention.

[0165] In the first embodiment of the multi-power source economic power optimization control device of the present invention, the multi-power source economic power optimization control device comprises:

[0166] The efficiency acquisition module 10 is used to obtain the comprehensive efficiency map of the motor transmission of the current vehicle at different gears.

[0167] The matching module 20 is used to obtain a target speed and a target torque, and search for a matching target efficiency map of different gears according to the target speed and the target torque.

[0168] The control module 30 is used to select a gear position with the highest efficiency factor from each target efficiency map as a target gear position, and control the motor gearbox at the target gear position.

[0169] The efficiency acquisition module 10 is also used to obtain the motor efficiency map of the motor at different gears and the gearbox efficiency map of the gearbox at different gears when the multi-power source of the current vehicle is a combination of a motor and a gearbox; and to superimpose the motor efficiency map and the gearbox efficiency map to obtain a comprehensive efficiency map under different gears.

[0170] The matching module 20 is further used to obtain a current optimization scheme, determine a target speed and a target torque according to the current optimization scheme, and search the comprehensive efficiency map for an efficiency map that matches the target speed and the target torque as a target efficiency map for different gears.

[0171] The matching module 20 is further used to perform exhaustive optimization on the target torque with a preset gradient ranging from 0% to 100% to obtain an optimization group; and search for a matching efficiency map in the comprehensive efficiency map as a target efficiency map for different gears according to the optimization group and the target speed.

[0172] The control module 30 is further used to select various efficiency factors corresponding to torque and speed from various target efficiency maps, select the highest efficiency factor from various efficiency factors; select the gear corresponding to the highest efficiency factor value from each target efficiency map as the target gear; and control the motor gearbox of the current vehicle at the target gear.

[0173] The control module 30 is also used to calculate the heat generation energy of the motor of the current vehicle at the target gear; calculate the need to restore the heat accumulation to a target temperature corresponding to the continuous torque output characteristic based on the motor heat generation energy; allocate corresponding input torque and input speed to the motor and gearbox of the current vehicle according to a preset allocation strategy; and control the motor and gearbox of the current vehicle to continuously operate at the input torque and input speed at the target temperature.

[0174] The control module 30 is further used to calculate and obtain the motor heating energy of the current vehicle at the target gear position by the following formula:

[0175] J=∫T*Rev / 9.55*(1-η)*δt

[0176] Among them, J is the motor heating energy, T is the motor torque, Rev is the motor speed, 9.55 is the ratio of the rated power to the speed of the motor, η is the current motor efficiency obtained according to the current motor efficiency map, and δt is the sampling time step of the motor torque and speed.

[0177] Among them, the steps implemented by each functional module of the multi-power source economic power optimization control device can refer to the various embodiments of the multi-power source economic power optimization control method of the present invention, and will not be repeated here.

[0178] In addition, an embodiment of the present invention further provides a storage medium, wherein a multi-power source economic power optimization control program is stored on the storage medium, and when the multi-power source economic power optimization control program is executed by a processor, the following operations are implemented:

[0179] Get the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears;

[0180] Obtaining a target speed and a target torque, and searching for a matching target efficiency map for different gears according to the target speed and the target torque;

[0181] A gear position in a map with the highest efficiency factor is selected from each target efficiency map as a target gear position, and the motor gearbox is controlled at the target gear position.

[0182] Furthermore, when the multi-power source economic power optimization control program is executed by the processor, the following operations are also implemented:

[0183] When the multi-power source of the current vehicle is a combination of a motor and a gearbox, obtaining a motor efficiency map of the motor at different gears, and obtaining a gearbox efficiency map of the gearbox at different gears;

[0184] The motor efficiency map and the gearbox efficiency map are superimposed to obtain a comprehensive efficiency map under different gears.

[0185] Furthermore, when the multi-power source economic power optimization control program is executed by the processor, the following operations are also implemented:

[0186] Obtaining a current optimization scheme, and determining a target speed and a target torque according to the current optimization scheme;

[0187] An efficiency map matching the target speed and the target torque is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0188] Furthermore, when the multi-power source economic power optimization control program is executed by the processor, the following operations are also implemented:

[0189] Performing exhaustive optimization on the target torque with a preset gradient ranging from 0% to 100% to obtain an optimization group;

[0190] According to the optimization group and the target speed, a matching efficiency map is searched in the comprehensive efficiency map as a target efficiency map for different gears.

[0191] Furthermore, when the multi-power source economic power optimization control program is executed by the processor, the following operations are also implemented:

[0192] Select each efficiency factor corresponding to the torque and speed from each target efficiency map, and select the highest efficiency factor from each efficiency factor;

[0193] Selecting the gear position corresponding to the highest value of the efficiency factor from each target efficiency map as the target gear position;

[0194] The motor transmission of the current vehicle is controlled at the target gear position.

[0195] Furthermore, when the multi-power source economic power optimization control program is executed by the processor, the following operations are also implemented:

[0196] Calculate the heat generation energy of the motor of the current vehicle at the target gear position;

[0197] According to the motor heat energy calculation, the heat accumulation needs to be restored to the target temperature corresponding to the continuous torque output characteristic;

[0198] Allocating corresponding input torque and input speed to the motor and gearbox of the current vehicle according to a preset allocation strategy;

[0199] The motor and the transmission of the current vehicle are controlled to continuously operate at the input torque and the input speed at the target temperature.

[0200] Furthermore, when the multi-power source economic power optimization control program is executed by the processor, the following operations are also implemented:

[0201] The motor heating energy of the current vehicle at the target gear is calculated by the following formula:

[0202] J=∫T*Rev / 9.55*(1-η)*δt

[0203] Among them, J is the motor heating energy, T is the motor torque, Rev is the motor speed, 9.55 is the ratio of the motor's rated power to the speed, η is the current motor efficiency obtained according to the current motor efficiency map, and δt is the sampling time step of the motor torque and speed.

[0204] Those skilled in the art will appreciate that all or part of the steps in the above-mentioned implementation method can be accomplished by instructing related hardware through a program, and the program is stored in a storage medium, including a number of instructions for enabling a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each implementation method of the present application; and the aforementioned storage medium is a computer-readable storage medium, including: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0205] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0206] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0207] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-power source economic power optimization control method, characterized in that: The multi-power source economic power optimization control method comprises: Get the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears; Obtaining a target speed and a target torque, and searching for a matching target efficiency map for different gears according to the target speed and the target torque; A gear position in a map with the highest efficiency factor is selected from each target efficiency map as a target gear position, and the motor gearbox is controlled at the target gear position.

2. The multi-power source economic power optimization control method according to claim 1, characterized in that: The obtaining of the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears includes: When the multi-power source of the current vehicle is a combination of a motor and a gearbox, obtaining a motor efficiency map of the motor at different gears, and obtaining a gearbox efficiency map of the gearbox at different gears; The motor efficiency map and the gearbox efficiency map are superimposed to obtain a comprehensive efficiency map under different gears.

3. The multi-power source economic power optimization control method according to claim 1, characterized in that: The acquiring the target speed and the target torque, and searching for the matching target efficiency maps of different gears according to the target speed and the target torque, includes: Obtaining a current optimization scheme, and determining a target speed and a target torque according to the current optimization scheme; An efficiency map matching the target speed and the target torque is searched in the comprehensive efficiency map as a target efficiency map for different gears.

4. The multi-power source economic power optimization control method according to claim 3, characterized in that: The searching the efficiency map matching the target speed and the target torque in the comprehensive efficiency map as the target efficiency map for different gears includes: Performing exhaustive optimization on the target torque with a preset gradient ranging from 0% to 100% to obtain an optimization group; According to the optimization group and the target speed, a matching efficiency map is searched in the comprehensive efficiency map as a target efficiency map for different gears.

5. The multi-power source economic power optimization control method according to claim 1, characterized in that: The step of selecting a gear position in a map with the highest efficiency factor from each target efficiency map as a target gear position, and controlling the motor gearbox at the target gear position includes: Select each efficiency factor corresponding to the torque and speed from each target efficiency map, and select the highest efficiency factor from each efficiency factor; Selecting the gear position corresponding to the highest value of the efficiency factor from each target efficiency map as the target gear position; The motor transmission of the current vehicle is controlled at the target gear position.

6. The multi-power source economic power optimization control method according to claim 5, characterized in that: The step of controlling the motor gearbox of the current vehicle at the target gear position includes: Calculate the heat generation energy of the motor of the current vehicle at the target gear position; According to the motor heat energy calculation, the heat accumulation needs to be restored to the target temperature corresponding to the continuous torque output characteristic; Allocating corresponding input torque and input speed to the motor and gearbox of the current vehicle according to a preset allocation strategy; The motor and the transmission of the current vehicle are controlled to continuously operate at the input torque and the input speed at the target temperature.

7. The multi-power source economic power optimization control method according to claim 6, characterized in that: The calculating the motor heating energy of the current vehicle at the target gear position includes: The motor heating energy of the current vehicle at the target gear is calculated by the following formula: J=∫T*Rev / 9.55*(1-η)*δt Among them, J is the motor heating energy, T is the motor torque, Rev is the motor speed, 9.55 is the ratio of the motor's rated power to the speed, η is the current motor efficiency obtained according to the current motor efficiency map, and δt is the sampling time step of the motor torque and speed.

8. A multi-power source economic power optimization control device, characterized in that: The multi-power source economic power optimization control device comprises: The efficiency acquisition module is used to obtain the comprehensive efficiency map of the motor gearbox of the current vehicle at different gears; A matching module, used to obtain a target speed and a target torque, and to search for a matching target efficiency map of different gears according to the target speed and the target torque; The control module is used to select the gear position of the map with the highest efficiency factor from each target efficiency map as the target gear position, and control the motor gearbox at the target gear position.

9. A multi-power source economic power optimization control device, characterized in that: The multi-power source economic power optimization control device includes: a memory, a processor, and a multi-power source economic power optimization control program stored in the memory and executable on the processor, wherein the multi-power source economic power optimization control program is configured to implement the steps of the multi-power source economic power optimization control method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores a multi-power source economical power optimization control program, which, when executed by the processor, implements the steps of the multi-power source economical power optimization control method as described in any one of claims 1 to 7.

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