Hybrid power parameter determination method and device and electronic equipment

Abstract

The invention discloses a hybrid power parameter determination method and device and electronic equipment, and relates to the field of vehicle design, and the method comprises the steps: determining the engine displacement of which the average operation power of an engine is consistent with a target fuel consumption area according to the average operation power, the torque standard deviation, the maximum torque fluctuation value and the fuel type in a vehicle road spectrum; according to the method, the determined engine can work in the interval with higher efficiency, the fuel economy is improved while the conventional power requirement is met, and the engine cost is reduced. The rated power of the motor is further determined according to the maximum operation power in the vehicle road spectrum and the target engine external power, and the target engine external power is the external power corresponding to the target vehicle speed or the target rotating speed under the maximum operation power. And determining the battery capacity according to the rated power of the motor, the climbing duration in the vehicle road spectrum and the battery adjustment coefficient. And on the basis of the engine, motor driving is matched to increase the endurance mileage, and the economy of the whole vehicle is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle design, and particularly relates to a hybrid power parameter determination method and device and electronic equipment. BACKGROUND

[0002] With the continuous development of vehicle manufacturing technology, passenger vehicles, especially family vehicles, using hybrid power are gradually popularized because they are mainly operated in urban conditions, have more acceleration and deceleration, more brake energy recovery, and better control of vehicle cost.

[0003] Unlike passenger vehicles, commercial vehicles, especially heavy long-distance tractor trucks, are mainly operated in high-speed conditions, resulting in less brake energy recovery and limited hybrid fuel saving effect. Therefore, how to design the hybrid power system of a commercial vehicle to improve the economy of the whole vehicle and reduce the use cost has become a problem to be solved. SUMMARY

[0004] In view of the above problems, the present application provides a hybrid power parameter determination method and device and electronic equipment to achieve the purpose of improving the economy of the whole vehicle and reducing the use cost. The specific scheme is as follows:

[0005] The first aspect of the present application provides a hybrid power parameter determination method, comprising:

[0006] According to the average operating power, torque standard deviation, maximum torque fluctuation value and fuel type in the vehicle road spectrum, the engine displacement corresponding to the target fuel consumption area in which the thermal efficiency of the engine is not less than the efficiency threshold is determined.

[0007] According to the maximum operating power in the vehicle road spectrum and the target engine external characteristic power, the rated power of the motor is determined, the target engine external characteristic power is the external characteristic power of the target engine at the target speed or the target speed, the target speed is the speed corresponding to the maximum operating power, the target speed is the speed corresponding to the maximum operating power, and the target engine is the engine corresponding to the engine displacement.

[0008] According to the rated power of the motor, the climbing time in the vehicle road spectrum and the battery adjustment coefficient, the battery capacity is determined.

[0009] In a possible implementation, the hybrid power parameter determination method further comprises:

[0010] When the transmission gear ratio is 1, the rear axle gear ratio is determined according to the tire radius, the commonly used speed in the vehicle road spectrum, the speed corresponding to the target fuel consumption area and the mapping coefficient.

[0011] In a possible implementation, the hybrid parameter determination method further includes:

[0012] determining a rated power of a generator according to the average operating power in the vehicle road spectrum, the rated power of the generator not being less than the average operating power in the vehicle road spectrum; the generator being arranged between the target engine and the motor, the generator being connected to a flywheel of the target engine through a shaft coupling, and the generator being connected to the motor through a clutch.

[0013] In a possible implementation, the determining of the engine displacement corresponding to the target fuel consumption region according to the average operating power in the vehicle road spectrum, the torque standard deviation, the maximum torque fluctuation value, and the fuel type includes:

[0014] determining an initial engine torque according to the average operating power in the vehicle road spectrum;

[0015] determining a corrected torque according to the torque standard deviation, the maximum torque fluctuation value, and the fuel type;

[0016] superimposing the corrected torque and the initial engine torque to obtain an engine external characteristic torque, and determining the engine displacement based on the engine external characteristic torque.

[0017] In a possible implementation, the determining of the corrected torque according to the torque standard deviation, the maximum torque fluctuation value, and the fuel type includes:

[0018] obtaining the corrected torque according to C=K×(ΔT extreme +2σ), where C is the corrected torque, K is a correction coefficient corresponding to the fuel type, σ is the torque standard deviation, and ΔT extreme is the maximum torque fluctuation value.

[0019] In a possible implementation, the determining of the rear axle speed ratio according to the tire radius, the commonly used vehicle speed in the vehicle road spectrum, the speed corresponding to the target fuel consumption region, and a mapping coefficient when the transmission speed ratio is 1 includes:

[0020] obtaining the rear axle speed ratio according to i0=r×u×n×i , where i0 is the rear axle speed ratio, r is the tire radius, u is the commonly used vehicle speed, n is the speed corresponding to the target fuel consumption region, i g is the transmission speed ratio, and 0.377 is the mapping coefficient.

[0021] In a possible implementation, the determining of the battery capacity according to the rated power of the motor, the duration of climbing in the vehicle road spectrum, and a battery adjustment coefficient includes:

[0022] The battery capacity is obtained according to A = B * T * S, where A is the battery capacity, B is the rated power of the motor, T is the hill climbing duration, and S is the battery adjustment coefficient.

[0023] In a possible implementation, when the gear ratio of the gearbox is 1, if the number of gears of the gearbox is 4, the target engine is engaged at the highest gear of the gearbox; if the number of gears of the gearbox is 6, the target engine is engaged at the fifth gear or the sixth gear of the gearbox.

[0024] The second aspect of the present application provides a hybrid parameter determination device, comprising:

[0025] An engine displacement determination module is configured to determine an engine displacement corresponding to a target fuel consumption region according to an average operating power, a torque standard deviation, a maximum torque fluctuation value, and a fuel type in a vehicle road spectrum, the target fuel consumption region representing that a thermal efficiency of the engine is not lower than an efficiency threshold.

[0026] A motor power determination module is configured to determine a rated power of a motor according to a maximum operating power in the vehicle road spectrum and a target engine external characteristic power, the target engine external characteristic power being an external characteristic power of a target engine at a target vehicle speed or a target rotating speed, the target vehicle speed being a vehicle speed corresponding to the maximum operating power, the target rotating speed being a rotating speed corresponding to the maximum operating power, and the target engine being an engine corresponding to the engine displacement.

[0027] A battery capacity determination module is configured to determine a battery capacity according to the rated power of the motor, a hill climbing duration in the vehicle road spectrum, and a battery adjustment coefficient.

[0028] The third aspect of the present application provides a computer program product, comprising computer readable instructions, when the computer readable instructions run on an electronic device, the electronic device implements the hybrid parameter determination method of the first aspect or any implementation manner of the first aspect.

[0029] The fourth aspect of the present application provides an electronic device, comprising at least one processor and a memory connected with the processor, wherein:

[0030] The memory is configured to store a computer program.

[0031] The processor is configured to execute the computer program, so that the electronic device can implement the hybrid parameter determination method of the first aspect or any implementation manner of the first aspect.

[0032] The fifth aspect of the present application provides a computer storage medium, which carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement the hybrid power parameter determination method of the first aspect or any implementation manner of the first aspect.

[0033] According to the technical solution, the hybrid power parameter determination method provided by the present application determines the engine displacement corresponding to the engine average operating power and the target fuel consumption area according to the average operating power, the torque standard deviation, the maximum torque fluctuation value and the fuel type in the vehicle road spectrum, so that the determined engine can work in a higher efficiency interval, meets the conventional power demand, reduces the engine displacement, improves the fuel economy, and reduces the engine cost. Further, the rated power of the motor is determined according to the maximum operating power in the vehicle road spectrum and the target engine external characteristic power, wherein the target engine external characteristic power is the external characteristic power corresponding to the target speed or the target speed under the maximum operating power. Then, the battery capacity is determined according to the rated power of the motor, the climbing time in the vehicle road spectrum and the battery adjustment coefficient. The engine is driven by the motor to increase the cruising range and improve the vehicle economy in the high-speed traction working condition of the commercial vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0034] The above and other features, advantages, and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, same or similar reference numerals can represent same or similar elements. It should be understood that the drawings are schematic, and the elements and features are not necessarily drawn to scale.

[0035] Figure 1 A flowchart of a hybrid power parameter determination method provided by the present application;

[0036] Figure 2 A traction working condition landing point and proportion schematic diagram provided by the present application;

[0037] Figure 3 An engine external characteristic power comparison effect diagram provided by the present application;

[0038] Figure 4 A hybrid architecture connection schematic diagram provided by the present application;

[0039] Figure 5 A structure diagram of a hybrid power parameter determination device provided by the present application;

[0040] Figure 6 A structure diagram of an electronic device provided by the present application. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0042] The embodiments of the present application will be described below in conjunction with the drawings. It is known to those skilled in the art that, as technology develops and new scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0043] The terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is only a way of distinguishing the objects with the same attributes used in the description of the embodiments of the present application. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that the processes, methods, systems, products or equipment containing a series of units do not have to be limited to those units, but can include other units not clearly listed or inherent to these processes, methods, products or equipment.

[0044] At present, in order to meet the power demand of long-distance traction, 12-15L large displacement engines are mostly used in the market. Taking a 13L engine as an example, its maximum external torque reaches 2500N•m, and the rated power reaches 400kW. At present, the hybrid configuration of commercial vehicles is relatively simple, and is mostly composed of an electric motor, an electric motor controller and a battery (commonly known as a three-electric system) based on a traditional large displacement engine.

[0045] As Figure 2 shown is the traction working condition drop point and proportion of a certain 13L engine, it can be found that 60% of the working condition drop point of this type of vehicle is in the low load (torque between 600-1400N•m), this part of the area is not the best fuel consumption area of the engine, the thermal efficiency is only about 42%, and it is difficult to improve, therefore, the hybrid vehicle using the 13L engine + traditional electric motor configuration cannot recover the three-electric cost in a short time (as Figure 2 shown, the braking condition proportion is only about 5%), resulting in high use cost.

[0046] In order to solve the above problems, the embodiment of the present application provides a hybrid power parameter determination method. The hybrid power parameter determination method of the embodiment of the present application will be described in detail below in conjunction with the drawings.

[0047] Referring to Figure 1 , Figure 1 The flowchart of the hybrid power parameter determination method provided by the embodiment of the present application is shown in Figure 1As shown, the hybrid parameter determination method provided by the embodiments of the present application can include steps S101 to S103, which are described in detail below.

[0048] S101, according to the average operating power, torque standard deviation, maximum torque fluctuation value and fuel type in the vehicle road spectrum, determine the engine displacement that is consistent with the target fuel consumption area of the engine average operating power, the target fuel consumption area represents that the thermal efficiency of the engine is not lower than the efficiency threshold.

[0049] Specifically, since different users commonly use different loads, average speeds, and operating routes, their corresponding required operating powers are also different. For example, Figure 2 As shown, taking a user with a vehicle load of 49 tons and an average speed of 85 km / h as an example, 60% of the working conditions of the commercial vehicle used by the user are operated in a flat plain working condition (the engine torque is between 600-1400 N•m, and the average operating power is between 90-120 kW), but about 10% of the working conditions are operated in acceleration, climbing and other working conditions.

[0050] Based on the above analysis of the user's vehicle usage, the average operating power, maximum road slope, maximum operating power required (such as 400 kW), maximum climbing mileage (such as 25 km), and climbing corresponding vehicle speed (such as 50 km / h) of the vehicle can be extracted based on the actual common road spectrum of the user.

[0051] On this basis, the engine displacement can be initially matched according to the average operating power, for example, the average operating power is between 90 kW -120 kW, and the corresponding torque provided by the engine is between 600 N•m-1400 N•m. To meet the power demand, 1400 N•m can be initially determined here. Further considering the power demand of the vehicle in acceleration, climbing and other working conditions. According to the torque standard deviation representing the torque fluctuation in the actual road spectrum of the vehicle, the torque increment exceeding the average torque value in the extreme working condition, i.e. the maximum torque fluctuation value, and the fuel type used by the selected engine, a further correction value for the torque is determined.

[0052] Then the correction value and the preliminarily determined torque 1400 N•m are superimposed to determine the final required output torque of the engine, and then the displacement of the engine is determined. When actually correcting the torque, the torque correction value should be as small as possible to avoid the final displacement of the engine being too large, resulting in an increase in cost and vehicle weight. For example, the general torque correction of a diesel engine can be 200 N•m to meet the driving demand, for example, a certain 8L displacement diesel engine can meet the requirement of 1600 N•m external characteristic torque. Through the selection of the corrected torque, the optimal fuel consumption area of the engine can be exactly the commonly used working condition area of the average running power, thereby improving the economy of the engine, reducing the cost of using the vehicle, and improving the fuel efficiency.

[0053] The specific implementation effect can be referred to as shown in Figure 3 Compared with the original direct use of a 13L displacement engine, the 8L displacement diesel engine can make the optimal fuel consumption area of the engine exactly the commonly used working condition area of the average running power, improve the efficiency of the engine, and reduce the volume and weight. After selecting a suitable small displacement engine, 60% of the actual working conditions fall in the optimal fuel consumption area of the engine, and compared with the medium and low load of a large engine, the area has more means, more space, and higher exhaust temperature for reducing fuel consumption, which can further improve the vehicle economy of the hybrid assembly.

[0054] S102, according to the maximum running power in the vehicle road spectrum and the target engine external characteristic power, the rated power of the motor is determined, the target engine external characteristic power is the external characteristic power of the target engine at the target speed or the target speed, the target speed is the speed corresponding to the maximum running power, the target speed is the speed corresponding to the maximum running power, and the target engine is the engine corresponding to the engine displacement.

[0055] Specifically, on the basis of determining the displacement of the engine, the rated power of the motor can be further determined. The actual maximum road slope and the maximum running power (for example, the maximum running power 400 kW) of the actual running route of the user can be selected: the engine external characteristic power + the motor external characteristic power at the speed (or the engine speed) is greater than or equal to the maximum running power (for example, 400 kW). Based on the above selection logic, on the basis of determining the displacement of the engine, the rated power of the motor should be greater than or equal to the difference between the maximum running power and the external characteristic power of the engine.

[0056] S103, according to the rated power of the motor, the climbing time in the vehicle road spectrum, and the battery adjustment coefficient, the battery capacity is determined.

[0057] Specifically, on the basis of the determination of the motor power, the battery size can be selected according to the maximum climbing mileage and the climbing speed: the battery capacity is obtained according to A = B x T x S, where A is the battery capacity, B is the rated power of the motor, T is the climbing time, and S is the battery adjustment coefficient.

[0058] wherein the rated power of the motor is the difference between the maximum operating power and the engine external characteristic power, for example, the maximum operating power is 400 kW and the engine external characteristic power is 250 kW. When the climbing time is 0.5 h, the determined battery capacity is:

[0059] (400-250) kW x 0.5 h x 2 = 150 degrees. The climbing time can be calculated from the maximum climbing mileage and the climbing speed. The battery adjustment coefficient is obtained according to experience, and generally takes a value between 1.5 and 2.

[0060] It can be seen from the above that the hybrid power parameter determination method reduces the initial installation cost, weight and volume of the hybrid assembly by reasonable matching of a small displacement engine (with a thermal efficiency of up to 50%) and improves the vehicle economy in the high-speed traction working condition of commercial vehicles.

[0061] In another embodiment, to ensure that the engine operates in the best fuel consumption zone corresponding to the best speed, the determination process of the rear axle speed ratio includes:

[0062] When the transmission speed ratio is 1, the rear axle speed ratio is determined according to the tire radius, the commonly used vehicle speed in the vehicle road spectrum, the speed corresponding to the target fuel consumption zone, and the mapping coefficient.

[0063] Specifically, the rear axle speed ratio can be obtained according to wherein i0 is the rear axle speed ratio, r is the tire radius, u is the commonly used vehicle speed, n is the speed corresponding to the target fuel consumption zone, and i g is the transmission speed ratio, and 0.377 is the mapping coefficient.

[0064] For example, when the tire radius is 0.526 m, the best speed n of the 8L engine is 1200 rpm, and i g is 1, the determined rear axle speed ratio is 2.8.

[0065] wherein as for the transmission speed ratio, if the gear of the transmission is 4, the target engine is in the highest gear of the transmission; if the gear of the transmission is 6, the target engine is in the fifth gear or the sixth gear of the transmission.

[0066] Specifically, to enhance the vehicle's electric drive capability, the AMT (Automated Manual Transmission) used can be a 4-speed or 6-speed transmission, compared to the 12-speed or 16-speed transmissions commonly found in current hybrid vehicles. Taking a 4-speed transmission as an example, through clutch control, the engine only engages in higher gears, while the electric motor drives the vehicle independently in other gears (for example, the engine only engages in the 4th gear of a 4-speed transmission or the 5th and 6th gears of a 6-speed transmission, at which point the transmission ratio is approximately 1). See Table 1 below for details.

[0067] Table 1

[0068]

[0069] In low gears, the electric motor provides electric drive, reducing power consumption on low-speed highways or during frequent maneuvers, while improving acceleration performance. In high gears, the engine engages and directly drives the vehicle, operating within its optimal fuel consumption range (e.g., [missing information]). Figure 3 (As shown) can significantly reduce fuel consumption throughout the long-distance transportation process.

[0070] In some embodiments, to ensure the efficient operation of the vehicle's electric drive, the hybrid power parameter determination method further includes the following processing steps:

[0071] The rated power of the generator is determined based on the average operating power in the vehicle road spectrum, and the rated power of the generator is not less than the average operating power in the vehicle road spectrum; the generator is installed between the target engine and the motor, the generator is connected to the flywheel of the target engine through a coupling, and the generator is connected to the motor through a clutch.

[0072] Specifically, refer to Figure 4 As shown, P1 represents the generator, and P2 represents the electric motor. The entire hybrid powertrain mainly consists of the engine, coupling, P1, clutch assembly, P2, and AMT transmission, employing a series-parallel hybrid configuration. P1 primarily functions as a generator (range extender), while P2 can operate independently as a pure electric drive at low speeds.

[0073] The rated power of P1 is no less than the average operating power of the engine mentioned above: it needs to cover the engine's optimal fuel consumption range, so it should be no less than 120kW, and up to 250kW under the premise of controllable cost.

[0074] Structurally, P1 is connected to the flywheel via a coupling in the form of a spline. The coupling plays the role of torque transmission and shock absorption. The front cover of P1 is connected to the engine flywheel housing, and the rear cover is connected to the front cover of P2. The flywheel and the coupling are arranged inside the front cover.

[0075] The generator is arranged so that the battery can generate electricity through the separation of the clutch in the case of abnormal power loss, such as long-time low-speed moving or unconventional route operation due to blockage, to ensure efficient operation of the electric drive of the vehicle.

[0076] P2 is connected to the clutch in the form of a spline, the front end cover of P2 is connected to the rear end cover of P1, and the clutch assembly is arranged inside the cavity formed by the front and rear end covers, and the front end thereof is connected to P1.

[0077] Through the series-parallel connection of P1 and P2, combined with the decision of the gearshift of the gearbox, the electric drive capacity of the vehicle is improved, and the economy of the vehicle in low-speed and climbing conditions is improved. Compared with the traditional P2 architecture alone, the P1 is added to ensure the electric quantity of the vehicle, and the 4-gear gearbox is used for pure electric driving at low speed.

[0078] It can be understood that those skilled in the art can select and adjust the structure of the above hybrid power assembly as needed, which is not limited herein.

[0079] In other embodiments, the engine displacement consistent with the target fuel consumption area according to the average operating power, torque standard deviation, maximum torque fluctuation value and fuel type in the vehicle road spectrum can specifically include:

[0080] Step 11, determining the initial engine torque according to the average operating power in the vehicle road spectrum.

[0081] Step 12, determining the corrected torque according to the torque standard deviation, the maximum torque fluctuation value and the fuel type.

[0082] Step 13, superimposing the corrected torque and the initial engine torque to obtain the engine external characteristic torque, and determining the engine displacement based on the engine external characteristic torque.

[0083] Specifically, taking the above engine with a displacement of 8L as an example, a suitable engine is matched according to the average operating power, for example, the average operating power is 90-120kW (engine torque is 600-1400N•m), then an engine with an external characteristic torque of about (1400+C) N•m is selected, where C is the corrected torque, and the specific calculation process is as follows:

[0084] C=K×(ΔT extreme +2σ);

[0085] C is the corrected torque, K is the correction coefficient corresponding to the fuel type, σ is the torque standard deviation, and ΔT extreme is the maximum torque fluctuation value.

[0086] Where, ΔT extremeThe increment of the extreme working condition torque exceeding the average value in the common actual road spectrum can be measured as 140 Nm. The torque fluctuation standard deviation σ in the common actual road spectrum needs to cover 95% of the working conditions, and is measured as 30 Nm. The fuel type correction coefficient K is represented, K=1.0 for diesel, K=1.1 for natural gas, and K=1.2 for methanol.

[0087] Therefore, the matching selection of the engine is not limited to diesel engines, but can be clean energy engine such as natural gas or methanol engine. According to experience, different fuels have different torque response speeds, and the C of the engine is different.

[0088] In a specific application, the hybrid power parameter determination method can reduce the initial installation cost, weight and volume of the hybrid assembly by adopting a small displacement engine (the thermal efficiency can reach 50%) + a 4-gear transmission + a rear axle in a reasonable matching, and improve the vehicle economy of the commercial vehicle in a high-speed traction working condition.

[0089] The above introduces a hybrid power parameter determination method provided by the embodiment of the application, and the following will introduce a device for executing the hybrid power parameter determination method.

[0090] Please refer to Figure 5 , Figure 5 FIG. 1 is a structural schematic diagram of a hybrid power parameter determination device provided by the embodiment of the application. As shown in the figure, the hybrid power parameter determination device comprises: Figure 5

[0091] The engine displacement determination module 501 is configured to determine an engine displacement corresponding to the target fuel consumption area according to the average operating power, the torque standard deviation, the maximum torque fluctuation value and the fuel type in the vehicle road spectrum, the target fuel consumption area representing that the thermal efficiency of the engine is not lower than the efficiency threshold.

[0092] The motor power determination module 502 is configured to determine the rated power of the motor according to the maximum operating power in the vehicle road spectrum and the target engine external characteristic power, the target engine external characteristic power being the external characteristic power of the target engine at the target vehicle speed or the target rotating speed, the target vehicle speed being the vehicle speed corresponding to the maximum operating power, the target rotating speed being the rotating speed corresponding to the maximum operating power, and the target engine being the engine corresponding to the engine displacement.

[0093] The battery capacity determination module 503 is configured to determine the battery capacity according to the rated power of the motor, the climbing time in the vehicle road spectrum and the battery adjustment coefficient.

[0094] In a possible implementation, the hybrid power parameter determination device further comprises a rear axle speed ratio determination module configured to determine the rear axle speed ratio according to the tire radius, the common vehicle speed in the vehicle road spectrum, the rotating speed corresponding to the target fuel consumption area and the mapping coefficient when the transmission speed ratio is 1.​

[0095] In a possible implementation, the hybrid parameter determination apparatus further includes: a generator parameter determination module configured to determine a rated power of a generator according to the average operating power in the vehicle road spectrum, the rated power of the generator being not less than the average operating power in the vehicle road spectrum; the generator being arranged between the target engine and the motor, the generator being connected to the flywheel of the target engine through a shaft coupling, and the generator being connected to the motor through a clutch.

[0096] In a possible implementation, the engine displacement determination module 501 determines the engine displacement corresponding to the average operating power of the engine and the target fuel consumption region according to the average operating power in the vehicle road spectrum, the torque standard deviation, the maximum torque fluctuation value, and the fuel type, and the process includes:

[0097] determining an initial engine torque according to the average operating power in the vehicle road spectrum;

[0098] determining a corrected torque according to the torque standard deviation, the maximum torque fluctuation value, and the fuel type;

[0099] superimposing the corrected torque and the initial engine torque to obtain an engine external characteristic torque, and determining the engine displacement based on the engine external characteristic torque.

[0100] In a possible implementation, the engine displacement determination module 501 determines the corrected torque according to the torque standard deviation, the maximum torque fluctuation value, and the fuel type, and the process includes:

[0101] determining the corrected torque according to C=K×(ΔT extreme +2σ), where C is the corrected torque, K is a correction coefficient corresponding to the fuel type, σ is the torque standard deviation, and ΔT extreme is the maximum torque fluctuation value.

[0102] In a possible implementation, the rear axle speed ratio determination module determines the rear axle speed ratio according to the tire radius, the commonly used vehicle speed in the vehicle road spectrum, the speed corresponding to the target fuel consumption region, and the mapping coefficient when the transmission speed ratio is 1, and the process includes:

[0103] determining the rear axle speed ratio according to i0=r×u×n / i , where i0 is the rear axle speed ratio, r is the tire radius, u is the commonly used vehicle speed, n is the speed corresponding to the target fuel consumption region, i g is the transmission speed ratio, and 0.377 is the mapping coefficient.

[0104] In a possible implementation, the battery capacity determination module 503 determines the battery capacity according to the rated power of the motor, the climbing time in the vehicle road spectrum, and a battery adjustment coefficient, and the process includes:

[0105] According to A=B×T×S, A is the battery capacity, B is the rated power of the motor, T is the time of climbing, and S is the battery adjustment coefficient.

[0106] In a possible implementation, the gearbox gear adjustment module is further configured to, when the gearbox speed ratio is 1, if the gearbox has four gears, the target engine is engaged at the highest gear of the gearbox; or if the gearbox has six gears, the target engine is engaged at the fifth gear or the sixth gear of the gearbox.

[0107] An electronic device is also provided in the embodiments of the present application. Referring to Figure 6 The electronic device in the embodiments of the present application can include, but is not limited to, an ECU (Electronic Control Unit), a VCU (Vehicle Control Unit), an MCU (Motor Control Unit), an HCU (Hybrid Control Unit), and the like. Figure 6 The electronic device shown is merely an example, and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0108] Referring to Figure 6 As shown in FIG. 6, the electronic device includes at least one processor 601 and a memory 602 connected to the processor 601, where the memory is configured to store a computer program, and the processor 601 is configured to execute the computer program, so that the electronic device can implement the hybrid power parameter determination method as described in the above embodiments.

[0109] The embodiments of the present application also provide a computer program product including computer readable instructions, which, when executed on an electronic device, enable the electronic device to implement any one of the hybrid power parameter determination methods provided in the embodiments of the present application.

[0110] The embodiments of the present application also provide a computer readable storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement any one of the hybrid power parameter determination methods provided in the embodiments of the present application.

[0111] It should be noted that the apparatus embodiments described above are merely illustrative, and the units described as separate units can or can not be physically separate, and the units displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment. In addition, the connection relationship between the modules in the apparatus embodiment provided in the present application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines.

[0112] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be realized by means of software and the necessary general hardware, and of course can also be realized by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. Generally, functions completed by computer programs can be easily realized by corresponding hardware, and the specific hardware structure for realizing the same function can also be various, such as analog circuit, digital circuit or special circuit, etc. However, for the present application, software program implementation is a better embodiment. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products, which are stored in readable storage media, such as computer floppy disks, U disks, mobile hard disks, ROM, RAM, magnetic or optical disks, etc., including a plurality of instructions for making a computer device (which can be a personal computer, a training device, or a network device, etc.) execute the methods described in various embodiments of the present application.

[0113] In the above embodiments, all or part can be realized by software, hardware, firmware or any combination thereof. When realized by software, it can be realized in the form of a computer program product in whole or in part.

[0114] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be stored by the computer or a data storage device such as a training device, a data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

Claims

1. A method for determining hybrid power parameters, characterized in that, include: Based on the average operating power, torque standard deviation, maximum torque fluctuation value and fuel type in the vehicle road spectrum, the engine displacement that matches the target fuel consumption zone with the average operating power of the engine is determined. The target fuel consumption zone indicates that the thermal efficiency of the engine is not lower than the efficiency threshold. The rated power of the motor is determined based on the maximum operating power in the vehicle road spectrum and the target engine external power. The target engine external power is the target engine external power at the target vehicle speed or target speed. The target vehicle speed is the vehicle speed corresponding to the maximum operating power. The target speed is the speed corresponding to the maximum operating power. The target engine is the engine corresponding to the engine displacement. The battery capacity is determined based on the rated power of the motor, the climbing time in the vehicle road map, and the battery adjustment coefficient.

2. The hybrid power parameter determination method according to claim 1, characterized in that, Also includes: When the gearbox ratio is 1, the rear axle ratio is determined based on the tire radius, the common vehicle speed in the vehicle road spectrum, the rotational speed corresponding to the target fuel consumption zone, and the mapping coefficient.

3. The method for determining hybrid power parameters according to claim 1 or 2, characterized in that, Also includes: The rated power of the generator is determined based on the average operating power in the vehicle road spectrum, and the rated power of the generator is not less than the average operating power in the vehicle road spectrum; the generator is located between the target engine and the motor, the generator is connected to the flywheel of the target engine through a coupling, and the generator is connected to the motor through a clutch.

4. The method for determining hybrid power parameters according to claim 1, characterized in that, The process of determining the engine displacement whose average operating power matches the target fuel consumption zone based on the vehicle's average operating power, torque standard deviation, maximum torque fluctuation value, and fuel type includes: The initial engine torque is determined based on the average operating power in the vehicle road spectrum. The corrected torque is determined based on the torque standard deviation, the maximum torque fluctuation value, and the fuel type. The corrected torque and the initial engine torque are superimposed to obtain the engine external torque, and the engine displacement is determined based on the engine external torque.

5. The hybrid power parameter determination method according to claim 4, characterized in that, The step of determining the corrected torque based on the torque standard deviation, the maximum torque fluctuation value, and the fuel type includes: According to C=K×(ΔT) extreme +2σ) to obtain the corrected torque, C is the corrected torque, K is the correction coefficient corresponding to the fuel type, σ is the standard deviation of the torque, ΔT extreme This refers to the maximum torque fluctuation value.

6. The method for determining hybrid power parameters according to claim 2, characterized in that, When the transmission ratio is 1, the rear axle ratio is determined based on the tire radius, the common vehicle speed in the vehicle road spectrum, the engine speed corresponding to the target fuel consumption zone, and the mapping coefficient, including: according to The rear axle speed ratio is obtained, where i0 is the rear axle speed ratio, r is the tire radius, u is the common vehicle speed, and n is the rotational speed corresponding to the target fuel consumption zone. g 0.377 is the gearbox ratio, and 0.377 is the mapping coefficient.

7. The method for determining hybrid power parameters according to claim 1, characterized in that, The process of determining the battery capacity based on the rated power of the motor, the climbing time in the vehicle's road map, and the battery adjustment coefficient includes: The battery capacity is obtained by using A=B×T×S, where A is the battery capacity, B is the rated power of the motor, T is the climbing time, and S is the battery adjustment coefficient.

8. The method for determining hybrid power parameters according to claim 6, characterized in that, When the gear ratio of the transmission is 1, if the transmission has 4 gears, the target engine engages in the highest gear of the transmission; if the transmission has 6 gears, the target engine engages in the fifth or sixth gear of the transmission.

9. A hybrid power parameter determining device, characterized in that, include: The engine displacement determination module is used to determine the engine displacement whose average operating power is consistent with the target fuel consumption zone based on the average operating power, torque standard deviation, maximum torque fluctuation value and fuel type in the vehicle road spectrum. The target fuel consumption zone indicates that the engine's thermal efficiency is not lower than the efficiency threshold. The motor power determination module is used to determine the rated power of the motor based on the maximum operating power in the vehicle road spectrum and the target engine external power. The target engine external power is the target engine external power at the target vehicle speed or target rotation speed. The target vehicle speed is the vehicle speed corresponding to the maximum operating power. The target rotation speed is the rotation speed corresponding to the maximum operating power. The target engine is the engine corresponding to the engine displacement. as well as, The battery capacity determination module is used to determine the battery capacity based on the rated power of the motor, the climbing time in the vehicle road spectrum, and the battery adjustment coefficient.

10. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program to enable the electronic device to implement the hybrid power parameter determination method as described in any one of claims 1 to 8.

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