Torque distribution method, apparatus, device, and medium

Abstract

The application provides a torque distribution method, device, equipment and medium. The method comprises the following steps: obtaining a driver demand torque, an engine economic optimal torque upper limit and an engine economic optimal torque lower limit, wherein the engine economic optimal torque is a torque that can be provided by the engine when the fuel consumption is the lowest; obtaining a torque size relationship between the driver demand torque and the engine economic optimal torque upper limit and the engine economic optimal torque lower limit; determining an engine target output torque and a motor target output torque according to the torque size relationship; controlling the engine to work according to the engine target output torque and controlling the motor to work according to the motor target output torque. The method provided by the application can save fuel consumption and reduce the vehicle use cost of commercial vehicle users.

Description

Technical Field

[0001] This application relates to the field of commercial vehicles, and more particularly to a torque distribution method, device, equipment, and medium. Background Technology

[0002] With the increasing scarcity of traditional energy sources and rising logistics costs, the operating costs for commercial vehicle users are also increasing. In order to reduce the operating costs for commercial vehicle users, fuel consumption has become a concern for commercial vehicle manufacturers.

[0003] Commercial vehicles include hybrid vehicles and mild hybrid vehicles. For hybrid vehicles, the common way to save fuel is to adjust the generator torque of the hybrid vehicle by calculating the real-time load of the hybrid system to reduce fuel consumption. This torque adjustment method is not suitable for mild hybrid vehicles. The existing fuel-saving method for mild hybrid vehicles is to calculate the cooperative operation of various systems in the mild hybrid vehicle, including the mild hybrid system, engine, waste heat recovery system and air conditioning system, to obtain waste heat and reduce fuel consumption by increasing the utilization rate of waste heat.

[0004] For mild hybrid vehicles, the fuel-saving methods of hybrid vehicles cannot be used, and the fuel-saving methods using waste heat are too complicated and the effect is not necessarily ideal. Therefore, a better method is needed to reduce fuel consumption for mild hybrid vehicles. Summary of the Invention

[0005] This application provides a torque distribution method, apparatus, device, and medium to solve the fuel consumption problem of commercial vehicles in the prior art.

[0006] Firstly, this application provides a torque distribution method, including:

[0007] The driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque are obtained, wherein the engine's economically optimal torque is the torque that the engine can provide when fuel consumption is at its lowest.

[0008] Obtain the relationship between the torque required by the driver and the torque of the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque;

[0009] Based on the aforementioned torque magnitude relationship, determine the target output torque of the engine and the target output torque of the electric motor;

[0010] The engine is controlled to operate based on the target output torque of the engine, and the motor is controlled to operate based on the target output torque of the motor.

[0011] In one possible implementation, determining the target output torque of the engine and the target output torque of the electric motor based on the torque magnitude relationship includes:

[0012] If the driver's required torque is greater than or equal to the upper limit of the engine's optimal economic torque, then obtain the first difference between the driver's required torque and the optimal torque for motor drive;

[0013] Based on the first difference and the upper limit of the engine's economically optimal torque or the lower limit of the engine's economically optimal torque, the target output torque of the engine and the target output torque of the motor are determined.

[0014] In one possible implementation, determining the engine target output torque and the electric motor target output torque based on the first difference and the engine's optimal economic torque upper limit or the engine's optimal economic torque lower limit includes:

[0015] If the first difference is greater than or equal to the upper limit of the engine's optimal economic torque, then the engine's target output torque is obtained based on the difference between the driver's required torque and the motor's optimal drive torque, and the motor's optimal drive torque is used as the motor's target output torque.

[0016] If the first difference is less than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the target output torque of the motor is obtained based on the difference between the driver's required torque and the upper limit of the engine's economic optimal torque.

[0017] In one possible implementation, if the driver's required torque is less than or equal to the engine's economically optimal torque lower limit, the method further includes:

[0018] The calculation amount is obtained by obtaining the driver's required torque and the optimal torque generated by the motor, wherein the calculation amount is the second difference or sum of the driver's required torque and the optimal torque generated by the motor;

[0019] Based on the computational load and the upper limit of the engine's economically optimal torque, the target output torque of the engine and the target output torque of the electric motor are determined.

[0020] In one possible implementation, determining the target output torque of the engine and the target output torque of the electric motor based on the computational load and the upper limit of the engine's economically optimal torque includes:

[0021] If the second difference is less than or equal to the lower limit of the engine's economic optimal torque, or the sum is greater than the lower limit of the engine's economic optimal torque and less than the upper limit of the engine's economic optimal torque, then the engine's target output torque is determined based on the sum of the driver's required torque and the motor's optimal torque, and the motor's optimal torque is taken as the motor's target output torque.

[0022] If the sum is greater than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the difference between the driver's required torque and the upper limit of the engine's economic optimal torque is taken as the motor's target output torque.

[0023] In one possible implementation, if the driver's required torque is greater than the lower limit of the engine's optimal economic torque and less than the upper limit of the engine's optimal economic torque, the method further includes:

[0024] The driver's required torque is taken as the target output torque of the motor, and the target output torque of the motor is confirmed to be zero.

[0025] In one possible implementation, obtaining the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque includes:

[0026] The required torque for the driver is obtained by looking up the torque mapping table based on the depth of the driver's accelerator pedal and the engine speed. The torque mapping table stores the mapping relationship between the depth and speed and the required torque for the driver.

[0027] Based on the engine speed and the universal curve characteristics of the engine, the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque are obtained.

[0028] Secondly, this application provides a torque distribution device, comprising:

[0029] The first acquisition module is used to acquire the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, wherein the engine's economically optimal torque is the torque that the engine can provide when its fuel consumption is at its lowest.

[0030] The second acquisition module is used to acquire the relationship between the torque required by the driver and the torque of the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque.

[0031] The first processing module is used to determine the target output torque of the engine and the target output torque of the motor based on the torque magnitude relationship.

[0032] The second processing module is used to control the engine to operate based on the engine's target output torque and to control the motor to operate based on the motor's target output torque.

[0033] Thirdly, this application provides a torque distribution device, comprising: at least one processor and a memory;

[0034] The memory stores computer-executed instructions;

[0035] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the torque distribution method as described above.

[0036] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the torque distribution method as described above.

[0037] This application provides a torque distribution method, apparatus, device, and medium, which acquires the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, wherein the engine's economically optimal torque is the torque that the engine can provide when fuel consumption is at its lowest; acquires the torque magnitude relationship between the driver's required torque and the upper and lower limits of the engine's economically optimal torque; determines the engine's target output torque and the motor's target output torque based on the torque magnitude relationship; controls the engine's operation based on the engine's target output torque and controls the motor's operation based on the motor's target output torque.

[0038] In the above method, by obtaining the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, and obtaining the torque relationship between the driver's required torque and the upper and lower limits of the engine's economically optimal torque, the range of torque required by the driver and the engine when fuel consumption is minimized is clarified. Combined with the torque that the electric motor can provide, the engine and the electric motor can reasonably allocate torque to meet the driver's needs, so that the driver can drive or brake the vehicle in the mode with the least fuel consumption. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of a torque distribution system provided in an embodiment of this application;

[0041] Figure 2 A flowchart of a torque distribution method provided in this application embodiment Figure 1 ;

[0042] Figure 3 A flowchart of a torque distribution method provided in this application embodiment Figure 2 ;

[0043] Figure 4A flowchart of a torque distribution method provided in this application embodiment Figure 3 ;

[0044] Figure 5 The universal curve characteristic curve of the engine provided in the embodiments of this application;

[0045] Figure 6 A torque distribution device diagram provided for an embodiment of the present invention;

[0046] Figure 7 This is a hardware schematic diagram of a torque distribution device provided in an embodiment of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Traditional energy sources, including diesel, are finite resources. As these resources are continuously consumed, their reserves become increasingly strained. As traditional energy resources become scarcer, the cost of using them will increase, and the fuel costs of diesel-powered commercial vehicles will also rise. How to reduce fuel costs, slow down the consumption of limited resources, and reduce the operating costs of commercial vehicles for users is an issue that commercial vehicle manufacturers should pay attention to.

[0049] To reduce vehicle fuel consumption, different methods are used for different types of vehicles. For example, commercial vehicles include hybrid vehicles and mild hybrid vehicles. For hybrid vehicles, engine torque can be allocated based on the battery's State of Charge (SOC). However, this allocation method is not suitable for commercial vehicles using mild hybrid systems, as the torque calculation is not precise enough to achieve the most energy-efficient allocation. For mild hybrid vehicles, existing methods consider the coordinated operation of different structures within the vehicle system, including the mild hybrid system, engine, waste heat recovery system, and air conditioning system, and replenish the corresponding energy-required parts with engine waste heat as needed, increasing the utilization rate of engine waste heat and thus reducing fuel consumption. However, this approach cannot achieve a significant reduction in fuel consumption, and a more effective method for fuel saving in commercial vehicles using mild hybrid systems is needed.

[0050] Therefore, this application proposes a method for adjusting the torque distribution between the engine and the mild hybrid system to achieve fuel savings.

[0051] The implementation process of the torque distribution method of this application is described below with reference to the accompanying drawings and specific embodiments.

[0052] Figure 1 This is a schematic diagram of a torque distribution system provided in an embodiment of this application. Figure 1 As shown, the system includes a mild hybrid system and an engine; wherein the mild hybrid system includes a battery and an electric motor;

[0053] The engine is a device that relies on traditional energy and converts it into mechanical energy; the motor and battery are both part of the mild hybrid system and can interact with each other. The motor can be driven by the battery to convert electrical energy into mechanical energy, and the battery can also receive the electricity generated by the motor and store electrical energy when appropriate.

[0054] In this application, the optimal economic torque range of the engine is obtained, which means that the engine can provide a range of torques with the lowest fuel consumption, including the upper limit and lower limit of the optimal economic torque. The torque required by the driver is obtained, and it is compared whether the torque required by the driver can be met within the optimal economic torque range of the engine. If not, the torque is output together with the electric motor, so that both the engine and the electric motor can provide torque to the driver to meet the driver's torque requirements. At the same time, the engine is kept at a low fuel consumption level to output torque, thus saving fuel.

[0055] The following is combined with Figure 2 The specific embodiments illustrate the process of allocating torque between the engine and the mild hybrid system motor in the torque distribution method of this application.

[0056] Figure 2 A flowchart of a torque distribution method provided in this application embodiment Figure 1 .like Figure 2 As shown, the method includes:

[0057] S201. Obtain the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, wherein the engine's economically optimal torque is the torque that the engine can provide when its fuel consumption is at its lowest.

[0058] When a driver drives or brakes a vehicle, he needs power or braking force, which is provided by the vehicle's power system. For commercial vehicles using a mild hybrid system, the power system includes a mild hybrid system and an engine. Therefore, the mild hybrid system and engine can be used to provide power or braking force to the vehicle. The mild hybrid system and engine can provide power to the vehicle by outputting torque. The specific torque to be provided can be allocated according to the driver's needs, thus obtaining the torque required by the driver.

[0059] In order to reduce fuel consumption and enable the engine to output torque within the range of lowest fuel consumption, the upper limit and lower limit of the engine's economically optimal torque are obtained based on the engine's economically optimal torque range.

[0060] The method for obtaining the driver's required torque can be achieved by querying a preset torque mapping table, for example:

[0061] The required torque for the driver is obtained by looking up a torque mapping table based on the depth of the driver's accelerator pedal and the engine speed. The torque mapping table stores the mapping relationship between the depth and speed and the required torque for the driver.

[0062] S202. Obtain the relationship between the torque required by the driver and the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque.

[0063] After obtaining the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, the relationship between the driver's required torque and the upper and lower limits of the engine's economically optimal torque is compared based on whether the upper and lower limits of the engine's torque under low fuel consumption conditions can meet the driver's required torque. This is to allow for the subsequent division of different torque distribution methods.

[0064] S203. Based on the torque magnitude relationship, determine the target output torque of the engine and the target output torque of the motor.

[0065] Based on the relationship between the driver's required torque and the upper and lower limits of the engine's optimal economic torque, the electric motor is also allowed to output torque to provide power to the vehicle when the engine outputs torque at low fuel consumption but cannot meet the driver's required torque. The target output torque of the engine and the target output torque of the electric motor are determined by the relationship between their torque values ​​and the driver's required torque, and the driver's torque requirements are guaranteed to be met.

[0066] S204. Control the engine to operate according to the target output torque of the engine and control the motor to operate according to the target output torque of the motor.

[0067] After obtaining the target output torque of the engine and the target output torque of the electric motor to meet the driver's torque requirements, the engine is controlled to work according to the target output torque of the engine to provide the corresponding torque to the vehicle, and the electric motor is controlled to work according to the target output torque of the electric motor to provide the corresponding torque to the vehicle. The engine and the electric motor work together to provide the vehicle with the required torque.

[0068] In this embodiment, the driver's required torque, the upper limit of the engine's optimal economic torque, and the lower limit of the engine's optimal economic torque are obtained. The optimal economic torque is the torque the engine can provide when fuel consumption is at its lowest. The relationship between the driver's required torque and the upper and lower limits of the engine's optimal economic torque is obtained. Based on this relationship, the target output torque of the engine and the target output torque of the motor are determined. The engine is controlled to operate based on the target output torque, and the motor is controlled to operate based on the target output torque. In this method, by obtaining the driver's required torque, the upper and lower limits of the engine's optimal economic torque, and the relationship between these torque values, the range of torque required by the driver and the engine when fuel consumption is minimized is clarified. Combined with the torque provided by the motor, the engine and motor are rationally allocated torque to meet the driver's needs, enabling the driver to drive or brake the vehicle in the least fuel-consuming mode.

[0069] The following is combined with Figure 3 The present application describes the process of allocating the torque of the engine and the mild hybrid system motor in the torque distribution method according to the condition that the torque required by the driver is greater than or equal to the upper limit of the engine's economically optimal torque.

[0070] Figure 3 A flowchart of a torque distribution method provided in this application embodiment Figure 2 .like Figure 3 As shown, the method includes:

[0071] S301. If the driver's required torque is greater than or equal to the upper limit of the engine's optimal economic torque, then obtain the first difference between the driver's required torque and the optimal torque for motor drive.

[0072] This embodiment is based on the situation where the driver's required torque is greater than or equal to the engine's optimal economic torque limit. That is, the maximum torque that the engine can output under low fuel consumption conditions cannot meet the driver's required torque. In this case, the optimal torque that the motor can output can be used to provide torque to the vehicle, while the other torque is provided by the engine. The optimal torque for motor driving is the optimal and maximum torque that the motor can output at the current motor speed, obtained based on the battery discharge limit and the motor efficiency characteristics.

[0073] The specific target output torque that the engine and motor should provide depends on the difference between the torque required by the driver and the optimal torque driven by the motor, as well as the upper and lower limits of the engine's economically optimal torque. Therefore, the first difference between the torque required by the driver and the optimal torque driven by the motor is obtained first.

[0074] S302. If the first difference is greater than or equal to the upper limit of the engine's optimal economic torque, then the engine's target output torque is obtained based on the difference between the driver's required torque and the motor's optimal drive torque, and the motor's optimal drive torque is used as the motor's target output torque.

[0075] When the driver's required torque is greater than or equal to the engine's optimal economic torque limit, and the first difference is greater than or equal to the engine's optimal economic torque limit, it indicates that the driver's required torque is large. The optimal torque driven by the electric motor should be used as the target output torque of the electric motor. The remaining torque requirement, i.e. the torque requirement corresponding to the first difference, is provided by the engine. The difference between the driver's required torque and the optimal torque driven by the electric motor is used as the engine's target output torque.

[0076] Express the output of the engine and motor at this time using formulas, for example:

[0077] Q eng1 =Q total -Q mot

[0078] Q trq1 =Q mot

[0079] Among them, Q eng1 Q represents the target output torque of the engine in this step. total Q is the torque required by the driver. mot For optimal torque to drive the motor, Q trq1 This is the target output torque of the motor in this step.

[0080] S303. If the first difference is less than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the target output torque of the motor is obtained based on the difference between the driver's required torque and the upper limit of the engine's economic optimal torque.

[0081] When the driver's required torque is greater than or equal to the engine's optimal economic torque limit, and the first difference is less than the engine's optimal economic torque limit, it means that the driver's required torque does not need to be supplemented by the motor's optimal torque, and the engine can work in a low fuel consumption state. At the same time, while the engine is using the engine's optimal torque limit as the engine's target output torque, the motor supplements the remaining torque demand. That is, the motor's target output torque is the difference between the driver's required torque and the engine's optimal torque limit, and at this time, this difference is less than the optimal torque driven by the motor.

[0082] Express the output of the engine and motor at this time using formulas, for example:

[0083] Q eng2 =Q up

[0084] Q trq2 =Q total -Q up

[0085] Among them, Q eng2 Q represents the target output torque of the engine in this step. total Q is the torque required by the driver. up Q is the upper limit of the engine's most economical torque. trq2 This is the target output torque of the motor in this step.

[0086] In this embodiment, by using conditional demarcation, the target output torque of the engine and motor is further divided when the driver's required torque is greater than or equal to the upper limit of the engine's economically optimal torque, so that the allocation is reasonable and fuel consumption is saved.

[0087] The following is combined with Figure 4 The specific embodiments illustrate the process of allocating the torque of the engine and the mild hybrid system motor in the torque distribution method of this application when the torque required by the driver is less than or equal to the lower limit of the engine's economically optimal torque.

[0088] Figure 4 A flowchart of a torque distribution method provided in this application embodiment Figure 3 .like Figure 4 As shown, the method includes:

[0089] S401. Obtain the calculated values ​​of the driver's required torque and the optimal torque generated by the motor, wherein the calculated values ​​are the second difference or sum of the driver's required torque and the optimal torque generated by the motor.

[0090] This embodiment is based on the situation where the driver's required torque is less than the engine's economically optimal torque limit. The engine does not necessarily have lower fuel consumption as the torque output is smaller. In this case, if we want to ensure that the engine works in a state of low fuel consumption, we can use the remaining torque from the power or braking force provided to the vehicle while maintaining low fuel consumption to charge the battery in the mild hybrid system.

[0091] At this point, the torque distribution between the engine and the motor should be determined by referring to the second difference or sum between the driver's required torque and the optimal torque generated by the motor. The optimal torque generated by the motor is the optimal torque at which the motor can operate, obtained based on the battery charging limit and the motor efficiency characteristics at the current motor speed.

[0092] S402. If the second difference is less than or equal to the lower limit of the engine's economic optimal torque, or the sum is greater than the lower limit of the engine's economic optimal torque and less than the upper limit of the engine's economic optimal torque, then the engine's target output torque is determined based on the sum of the driver's required torque and the motor's optimal generating torque, and the motor's optimal generating torque is taken as the motor's target output torque.

[0093] When the driver's required torque is less than the upper limit of the engine's optimal economic torque, and the second difference is less than or equal to the lower limit of the engine's optimal economic torque; or when the driver's required torque is less than the upper limit of the engine's optimal economic torque, and the sum is greater than the lower limit of the engine's optimal economic torque and less than the upper limit of the engine's optimal economic torque; it indicates that the engine can simultaneously meet the driver's required torque and the battery's charging needs.

[0094] At this time, the engine's target output torque is the sum of the driver's required torque and the motor's optimal torque. When charging the battery, the motor's target output torque is negative, so the motor operates at its optimal torque.

[0095] Express the output of the engine and motor at this time using formulas, for example:

[0096] Q eng3 =Q total +Q drv

[0097] Q trq3 =Q drv

[0098] Among them, Q eng3 Q represents the target output torque of the engine in this step. total Q is the torque required by the driver. drv For the optimal torque for the motor to generate electricity, Q trq3 This is the target output torque of the motor in this step.

[0099] S403. If the sum is greater than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the difference between the driver's required torque and the upper limit of the engine's economic optimal torque is taken as the motor's target output torque.

[0100] When the driver's required torque is less than the engine's optimal economic torque limit, and the sum of these values ​​is greater than the engine's optimal economic torque limit, it indicates that the engine cannot simultaneously meet the driver's required torque and the battery's charging needs under low fuel consumption operating conditions. Therefore, meeting the driver's required torque takes priority, and the engine uses the engine's optimal economic torque limit as the engine's target output torque. The difference between the driver's required torque and the engine's optimal economic torque limit is used as the electric motor's target output torque.

[0101] Express the output of the engine and motor at this time using formulas, for example:

[0102] Q eng4 =Q up

[0103] Q trq4 =Q total -Q up

[0104] Among them, Q eng4 Q represents the target output torque of the engine in this step. total Q is the torque required by the driver. up Q is the upper limit of the engine's most economical torque. trq4 This is the target output torque of the motor in this step.

[0105] In this embodiment, by using conditional demarcation, the distribution of the target output torque of the engine and motor is further divided when the driver's required torque is less than the upper limit of the engine's economically optimal torque, so that the distribution is reasonable and fuel consumption is saved.

[0106] In addition to the boundaries described in the above embodiments, there are also cases where the driver's required torque is greater than the lower limit of the engine's optimal economic torque and less than the upper limit of the engine's optimal economic torque. For example, the torque allocation corresponding to this case is as follows:

[0107] The driver's required torque is taken as the target output torque of the motor, and the target output torque of the motor is confirmed to be zero.

[0108] The above embodiments specifically illustrate how, when the upper limit of the engine's optimal economic torque does not meet the driver's required torque, the electric motor supplements the torque; or when the lower limit of the engine's optimal economic torque can meet the driver's required torque, the engine provides torque while simultaneously generating electricity for the battery. When the engine's optimal economic torque is within the range of the upper and lower limits and can just meet the driver's required torque, the engine directly provides torque based on the driver's required torque, while the mild hybrid system does not output torque or charge, and its motor's target output torque is zero.

[0109] The following is combined with Figure 5 The specific embodiments illustrate the regional division of torque distribution between the engine and the mild hybrid system motor in the torque distribution method of this application.

[0110] Figure 5 The universal characteristic curve of the engine provided in this application embodiment is shown in the figure. Figure 5As shown, the curve includes: the universal curve characteristic curve of the engine, and the torque distribution area corresponding to the torque magnitude relationship between the driver's required torque and the upper limit and lower limit of the engine's economically optimal torque in the above embodiment. Figure 5 In this context, Nm represents torque, measured in Newton-meters; r / min represents rotational speed, measured in revolutions per minute.

[0111] The method for obtaining the upper limit and lower limit of the engine's economically optimal torque in the above embodiments is exemplified as follows:

[0112] Based on the engine speed and the universal curve characteristics of the engine, the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque are obtained.

[0113] Figure 5 The closer to the dashed ring, the better the fuel economy of the engine. The C area inside the dashed ring corresponds to the upper and lower limits of the engine's optimal torque for economy, and it can meet the torque required by the driver.

[0114] The A1, A2, and A3 regions, which are jointly divided by the dashed ring and the dashed line, correspond to the situation where the driver's required torque is greater than or equal to the upper limit of the engine's optimal economic torque. The A1 region also corresponds to the situation where the first difference is greater than or equal to the upper limit of the engine's optimal economic torque, the A2 region also corresponds to the situation where the first difference is less than the lower limit of the engine's optimal economic torque, and the A3 region also corresponds to the situation where the first difference is within the range of the upper and lower limits of the engine's optimal economic torque.

[0115] The B6, B7, and B8 regions, which are jointly divided by the dashed ring and the dashed line, correspond to the situation where the driver's required torque is less than the upper limit of the engine's optimal economic torque. The B6 region also corresponds to the situation where the second difference is less than or equal to the lower limit of the engine's optimal economic torque. The B7 region also corresponds to the situation where the sum is greater than the upper limit of the engine's optimal economic torque. The B8 region also corresponds to the situation where the sum is greater than the lower limit of the engine's optimal economic torque and less than the upper limit of the engine's optimal economic torque.

[0116] The torque distribution for each of the above regions is as shown in the above embodiment.

[0117] Figure 6 A diagram of a torque distribution device provided in an embodiment of the present invention is shown below. Figure 6 As shown, the device includes: a first acquisition module 601, a second acquisition module 602, a first processing module 603, and a second processing module 604;

[0118] The first acquisition module 601 is used to acquire the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, wherein the engine's economically optimal torque is the torque that the engine can provide when its fuel consumption is at its lowest.

[0119] The second acquisition module 602 is used to acquire the relationship between the torque required by the driver and the torque of the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque.

[0120] The first processing module 603 is used to determine the target output torque of the engine and the target output torque of the motor based on the torque magnitude relationship.

[0121] The first processing module 603 is further configured to obtain a first difference between the driver's required torque and the motor drive optimal torque if the driver's required torque is greater than or equal to the upper limit of the engine's economic optimal torque.

[0122] Based on the first difference and the upper limit of the engine's economically optimal torque or the lower limit of the engine's economically optimal torque, the target output torque of the engine and the target output torque of the motor are determined.

[0123] The first processing module 603 is further configured to, if the first difference is greater than or equal to the upper limit of the engine's economic optimal torque, obtain the engine's target output torque based on the difference between the driver's required torque and the motor's optimal drive torque, and use the motor's optimal drive torque as the motor's target output torque;

[0124] If the first difference is less than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the target output torque of the motor is obtained based on the difference between the driver's required torque and the upper limit of the engine's economic optimal torque.

[0125] The first processing module 603 is further configured to obtain the calculated amount of the driver's required torque and the optimal torque generated by the motor, wherein the calculated amount is a second difference or sum of the driver's required torque and the optimal torque generated by the motor.

[0126] Based on the computational load and the upper limit of the engine's economically optimal torque, the target output torque of the engine and the target output torque of the electric motor are determined.

[0127] The first processing module 603 is further configured to determine the target output torque of the engine based on the sum of the driver's required torque and the optimal torque generated by the motor, and to use the optimal torque generated by the motor as the target output torque of the motor if the second difference is less than or equal to the lower limit of the engine's economic optimal torque, or the sum is greater than the lower limit of the engine's economic optimal torque and less than the upper limit of the engine's economic optimal torque.

[0128] If the sum is greater than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the difference between the driver's required torque and the upper limit of the engine's economic optimal torque is taken as the motor's target output torque.

[0129] The second processing module 604 is used to control the engine to operate according to the target output torque of the engine and to control the motor to operate according to the target output torque of the motor.

[0130] This application also provides a torque distribution device, including: at least one processor and a memory;

[0131] The memory stores computer-executed instructions;

[0132] The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to execute a torque distribution method.

[0133] Figure 7 This is a hardware schematic diagram of a torque distribution device provided in an embodiment of the present invention. Figure 7 As shown, the torque distribution device 70 provided in this embodiment includes at least one processor 701 and a memory 702. The device 70 also includes a communication component 703. The processor 701, memory 702, and communication component 703 are connected via a bus 704.

[0134] In a specific implementation, at least one processor 701 executes computer execution instructions stored in the memory 702, causing at least one processor 701 to execute the torque distribution method described above.

[0135] The specific implementation process of processor 701 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0136] In the above Figure 7 In the illustrated embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0137] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0138] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0139] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the torque distribution method described above.

[0140] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0141] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0142] The division of units described herein is merely a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0143] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0144] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0145] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the 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 to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0146] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0147] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A torque distribution method, characterized in that, include: The driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque are obtained, wherein the engine's economically optimal torque is the torque that the engine can provide when fuel consumption is at its lowest. Obtain the relationship between the torque required by the driver and the torque of the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque; Based on the aforementioned torque magnitude relationship, determine the target output torque of the engine and the target output torque of the electric motor; The engine is controlled to operate based on the target output torque of the engine, and the motor is controlled to operate based on the target output torque of the motor. The step of determining the target output torque of the engine and the target output torque of the electric motor based on the torque magnitude relationship includes: If the driver's required torque is greater than or equal to the upper limit of the engine's optimal economic torque, then obtain the first difference between the driver's required torque and the optimal torque for motor drive; Based on the first difference and the upper limit of the engine's economically optimal torque or the lower limit of the engine's economically optimal torque, the target output torque of the engine and the target output torque of the motor are determined.

2. The method according to claim 1, characterized in that, The step of determining the target output torque of the engine and the target output torque of the electric motor based on the first difference and the upper limit of the engine's optimal economic torque or the lower limit of the engine's optimal economic torque includes: If the first difference is greater than or equal to the upper limit of the engine's optimal economic torque, then the engine's target output torque is obtained based on the difference between the driver's required torque and the motor's optimal drive torque, and the motor's optimal drive torque is used as the motor's target output torque. If the first difference is less than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the target output torque of the motor is obtained based on the difference between the driver's required torque and the upper limit of the engine's economic optimal torque.

3. The method according to claim 1, characterized in that, If the driver's required torque is less than or equal to the engine's optimal economic torque lower limit, the method further includes: The calculation amount is obtained by obtaining the driver's required torque and the optimal torque generated by the motor, wherein the calculation amount is the second difference or sum of the driver's required torque and the optimal torque generated by the motor; Based on the computational load and the upper limit of the engine's economically optimal torque, the target output torque of the engine and the target output torque of the electric motor are determined.

4. The method according to claim 3, characterized in that, The step of determining the target output torque of the engine and the target output torque of the electric motor based on the calculated amount and the upper limit of the engine's economically optimal torque includes: If the second difference is less than or equal to the lower limit of the engine's economic optimal torque, or the sum is greater than the lower limit of the engine's economic optimal torque and less than the upper limit of the engine's economic optimal torque, then the engine's target output torque is determined based on the sum of the driver's required torque and the motor's optimal torque, and the motor's optimal torque is taken as the motor's target output torque. If the sum is greater than the upper limit of the engine's economic optimal torque, then the upper limit of the engine's economic optimal torque is taken as the engine's target output torque, and the difference between the driver's required torque and the upper limit of the engine's economic optimal torque is taken as the motor's target output torque.

5. The method according to claim 1, characterized in that, If the driver's required torque is greater than the lower limit of the engine's optimal economic torque and less than the upper limit of the engine's optimal economic torque, the method further includes: The driver's required torque is taken as the target output torque of the motor, and the target output torque of the motor is confirmed to be zero.

6. The method according to claim 1, characterized in that, The acquisition of the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque includes: The required torque for the driver is obtained by looking up the torque mapping table based on the depth of the driver's accelerator pedal and the engine speed. The torque mapping table stores the mapping relationship between the depth and speed and the required torque for the driver. Based on the engine speed and the universal curve characteristics of the engine, the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque are obtained.

7. A torque distribution device, characterized in that, include: The first acquisition module is used to acquire the driver's required torque, the upper limit of the engine's economically optimal torque, and the lower limit of the engine's economically optimal torque, wherein the engine's economically optimal torque is the torque that the engine can provide when its fuel consumption is at its lowest. The second acquisition module is used to acquire the relationship between the torque required by the driver and the torque of the upper limit of the engine's economically optimal torque and the lower limit of the engine's economically optimal torque. The first processing module is used to determine the target output torque of the engine and the target output torque of the motor based on the torque magnitude relationship. The second processing module is used to control the engine to operate based on the engine's target output torque and to control the motor to operate based on the motor's target output torque. The first processing module is further configured to, if the driver's required torque is greater than or equal to the upper limit of the engine's optimal economic torque, obtain a first difference between the driver's required torque and the optimal torque of the motor drive; and, based on the first difference and the upper limit of the engine's optimal economic torque or the lower limit of the engine's optimal economic torque, confirm the engine's target output torque and the motor's target output torque.

8. A torque distribution device, characterized in that, include: At least one processor and memory; The memory stores computer-executed instructions; The at least one processor executes computer execution instructions stored in the memory, causing the at least one processor to perform the torque distribution method as described in any one of claims 1-6.

9. A 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 steps of the torque distribution method as described in any one of claims 1-6.

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