Oil-electricity distribution method and device for series hybrid electric vehicle, vehicle and medium

Abstract

The application relates to an oil-electricity distribution method and device for a series hybrid vehicle, a vehicle and a medium, wherein the method comprises the following steps: collecting an actual vehicle speed of the series hybrid vehicle, and obtaining a target engine speed based on an NVH acceptable engine speed line at each vehicle speed according to the actual vehicle speed; calculating a target charging power based on a preset range extender optimal economy line, a preset emission constraint power line at each engine speed, a preset NVH acceptable power line at each speed and a preset vehicle wheel end demand power line at each vehicle speed according to the target engine speed; calculating a target torque according to the target engine speed and the target charging power, and obtaining an engine power generation working condition point based on the target torque, so that the oil-electricity distribution strategy is adjusted, the emission, the NVH and the electric balance performance are balanced while the power performance and the fuel consumption are considered, and the comprehensive performance and the competitiveness of the vehicle are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and in particular to a method, device, vehicle, and medium for distributing oil and electricity in a series hybrid electric vehicle. Background Art

[0002] The core of a series hybrid's oil-electric distribution strategy lies in controlling the engine's power generation operating point. Typical control methods include single-point control, multi-point control, and power-following control. Single-point control ensures the engine is always at its highest efficiency point, resulting in excellent fuel consumption. However, if the vehicle's power demand is high for an extended period, the engine's power generation capacity cannot be met, requiring additional battery replenishment, leading to a continuous decline in the battery's SoC (State of Charge). Ultimately, power output must be limited, sacrificing performance to ensure the battery charge remains constant. Power-following control offers excellent performance. However, if wheel-end power demand fluctuates frequently, the engine's operating point also fluctuates, resulting in poor fuel consumption. Multi-point control combines the advantages of single-point and power-following control, balancing power and fuel consumption. This results in a stable engine operating point, better fuel consumption than power-following control, and better performance than single-point control.

[0003] Currently, related technologies can stabilize the engine speed by controlling the output torque of the BSG (Belt Driven Starter Generator) motor when the engine is not driving the hybrid vehicle and the BSG motor is generating electricity. This improves the NVH (Noise, Vibration, Harshness) performance of the hybrid vehicle and reduces the fuel consumption and emissions of the hybrid vehicle. In addition, related technologies can control the relevant parameters of the series mode engine operation by designing the series mode control of the hybrid vehicle, taking into account both economy and NVH performance, and effectively guiding the development of the series mode of hybrid vehicles.

[0004] However, while taking into account power and fuel consumption, the relevant technologies cannot effectively balance emissions, NVH and electrical balance performance, which urgently needs to be addressed. Summary of the Invention

[0005] The present application provides a method, device, vehicle and medium for distributing oil and electricity for a series hybrid electric vehicle, so as to solve the problem that the related technology cannot effectively balance the emission, NVH and electric balance performance while considering the power and fuel consumption.

[0006] The first aspect of the present application provides an oil-electricity distribution method for a series hybrid electric vehicle, comprising the following steps: collecting an actual vehicle speed of the series hybrid electric vehicle, and obtaining a target engine speed based on a preset engine speed line of NVH acceptable speed under each vehicle speed according to the actual vehicle speed; calculating a target charging power based on a preset best economic line of the range extender, a preset emission constraint power line under each engine speed, a preset power line of NVH acceptable speed under each speed, and a preset power demand line of the vehicle wheel end under each vehicle speed according to the target engine speed; and calculating a target torque according to the target engine speed and the target charging power, and obtaining a power generation working condition point of the engine based on the target torque.

[0007] Optionally, in an embodiment of the present application, the calculation formula of the target torque is:

[0008]

[0009] Wherein, N is the target speed, and P is the target charging power.

[0010] Optionally, in an embodiment of the present application, the calculation formula of the target charging power is:

[0011] P=max(min(L1(N),L2(N),L4(N)),L5(N)),

[0012] Wherein, L1 is the best economic line of the range extender, L2 is the emission constraint power line, L4 is the power line of NVH, and L5 is the power demand line of the vehicle wheel end.

[0013] Optionally, in an embodiment of the present application, before calculating the target charging power, it further comprises: calculating the comprehensive efficiency of the range extender based on the engine simulation or bench test universal characteristic data, and the motor simulation or bench test efficiency data; calculating the lowest speed of energy consumption under each power based on the comprehensive efficiency, and generating the preset best economic line of the range extender.

[0014] Optionally, in an embodiment of the present application, before calculating the target charging power, it further comprises: calculating the preset emission constraint power line under each engine speed according to the engine simulation or bench test engine original emission data.

[0015] Optionally, in an embodiment of the present application, before calculating the target charging power, it further comprises: calculating the preset power line of NVH acceptable speed under each speed according to the vehicle NVH simulation / experiment data; and / or, calculating the preset power demand line of the vehicle wheel end under each vehicle speed according to the vehicle simulation / experiment data.

[0016] Optionally, in one embodiment of the present application, before obtaining the target engine speed, the method further includes: calculating the engine speed line with acceptable NVH at each preset vehicle speed based on the whole vehicle NVH simulation / test data.

[0017] A second aspect of the present application provides an oil-electric distribution device for a series hybrid electric vehicle, including: an acquisition module for acquiring the actual vehicle speed of the series hybrid electric vehicle, and obtaining a target engine speed based on the actual vehicle speed and a preset engine speed line with acceptable NVH at each vehicle speed; a first calculation module for calculating a target charging power based on the target engine speed, a preset range extender optimal economy line, a preset emission constraint power line at each engine speed, a preset NVH acceptable power line at each speed, and a preset full wheel end demand power line at each vehicle speed; and an acquisition module for calculating a target torque based on the target engine speed and the target charging power, and obtaining the engine's power generation operating point based on the target torque.

[0018] Optionally, in one embodiment of the present application, the target torque is calculated as follows:

[0019]

[0020] Wherein, N is the target speed and P is the target charging power.

[0021] Optionally, in one embodiment of the present application, the target charging power is calculated as follows:

[0022] P=max(min(L1(N),L2(N),L4(N)),L5(N)),

[0023] Among them, L1 is the optimal economy line of the range extender, L2 is the emission constraint power line, L4 is the NVH power line, and L5 is the required power line of the entire wheel end.

[0024] Optionally, in one embodiment of the present application, it further includes: a second calculation module, which is used to calculate the comprehensive efficiency of the range extender based on the universal characteristic data of the engine simulation or bench test, and the efficiency data of the motor simulation or bench test before calculating the target charging power; a generation module, which is used to calculate the lowest energy consumption speed at each power based on the comprehensive efficiency, and generate the preset optimal economic line of the range extender.

[0025] Optionally, in one embodiment of the present application, it further includes: a third calculation module, which is used to calculate the emission constraint power line at each preset engine speed based on engine simulation or bench test engine original emission data before calculating the target charging power.

[0026] Optionally, in an embodiment of the present application, further comprising: a fourth calculation module, configured to calculate the preset NVH-acceptable power line at each rotation speed according to the whole vehicle NVH simulation / experiment data before calculating the target charging power; and / or, a fifth calculation module, configured to calculate the whole vehicle wheel end demand power line at each vehicle speed according to the whole vehicle simulation / experiment data.

[0027] Optionally, in an embodiment of the present application, further comprising: a sixth calculation module, configured to calculate the preset NVH-acceptable engine rotation speed line at each vehicle speed according to the whole vehicle NVH simulation / experiment data before obtaining the target engine rotation speed.

[0028] The third aspect embodiment of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the oil-electricity distribution method of the series hybrid electric vehicle as described in the above embodiments.

[0029] The fourth aspect embodiment of the present application provides a computer readable storage medium, which stores a computer program executable by a processor to implement the oil-electricity distribution method of the series hybrid electric vehicle as described above.

[0030] Therefore, the embodiments of the present application have the following beneficial effects:

[0031] The embodiments of the present application can collect the actual vehicle speed of the series hybrid electric vehicle, and obtain the target engine rotation speed based on the preset NVH-acceptable engine rotation speed line at each vehicle speed according to the actual vehicle speed; calculate the target charging power based on the preset range extender optimal economy line, the preset emission-restricted power line at each engine rotation speed, the preset NVH-acceptable power line at each rotation speed, and the preset whole vehicle wheel end demand power line at each vehicle speed according to the target engine rotation speed; calculate the target torque according to the target engine rotation speed and the target charging power, and obtain the engine power generation working condition point based on the target torque, so as to adjust the oil-electricity distribution strategy, balance the emission, NVH, and electrical balance performance while considering the power performance and fuel consumption, and effectively improve the comprehensive performance and competitiveness of the vehicle. Therefore, the problem that the related art cannot effectively balance the emission, NVH, and electrical balance performance while considering the power performance and fuel consumption is solved.

[0032] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0034] Figure 1 This is a flow chart of a method for distributing oil and electricity in a series hybrid electric vehicle according to an embodiment of the present application;

[0035] Figure 2 A schematic diagram of the comprehensive efficiency of a range extender (engine and generator) provided according to one embodiment of the present application;

[0036] Figure 3 A logical architecture diagram of a method for allocating oil and electricity for a series hybrid electric vehicle according to one embodiment of the present application;

[0037] Figure 4 This is an example diagram of an oil-electric distribution device for a series hybrid electric vehicle according to an embodiment of the present application;

[0038] Figure 5 A schematic structural diagram of a vehicle provided for an application embodiment.

[0039] Among them, 10 is an oil-electric distribution device of a series hybrid electric vehicle, 100 is a collection module, 200 is a first calculation module, 300 is an acquisition module, 501 is a memory, 502 is a processor, and 503 is a communication interface. DETAILED DESCRIPTION

[0040] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0041] The following describes, with reference to the accompanying drawings, a method, apparatus, vehicle, and medium for allocating fuel to a series hybrid vehicle according to embodiments of the present application. To address the issues mentioned in the background art, the present application provides a method for allocating fuel to a series hybrid vehicle. The method comprises collecting the actual vehicle speed of the series hybrid vehicle and, based on the actual vehicle speed, determining a target engine speed based on a preset engine speed line with acceptable NVH at various vehicle speeds. The method then calculates a target charging power based on the target engine speed, a preset range extender optimal economy line, a preset emission-constrained power line at various engine speeds, a preset NVH-acceptable power line at various speeds, and a preset wheel-end power demand line at various vehicle speeds. The method then calculates a target torque based on the target engine speed and target charging power, and obtains the engine's power generation operating point based on the target torque. The present application determines the engine's power generation operating point by calculating the range extender's optimal economy line, the emission-constrained power line, the NVH speed line, the NVH power line, and the wheel-end power demand line. This method then adjusts the fuel-power allocation strategy to effectively balance emissions, NVH, and power balance performance while considering power and fuel consumption, thereby improving the vehicle's overall performance and competitiveness. This solves the problem that related technologies cannot effectively balance emissions, NVH and electrical balance performance while taking into account power and fuel consumption.

[0042] Specifically, Figure 1 This is a flow chart of a method for distributing oil and electricity in a series hybrid electric vehicle provided in an embodiment of the present application.

[0043] like Figure 1 As shown, the oil-electricity distribution method of the series hybrid electric vehicle includes the following steps:

[0044] In step S101 , the actual vehicle speed of the series hybrid vehicle is collected, and a target engine speed is obtained based on the actual vehicle speed and preset engine speed lines with acceptable NVH at various vehicle speeds.

[0045] The embodiments of the present application can collect the real-time driving speed of a series hybrid vehicle through devices such as vehicle speed sensors, and at the same time, combine the engine speed line with acceptable NVH at various vehicle speeds to obtain the vehicle's target engine speed, thereby providing data support for obtaining the engine's target torque.

[0046] Optionally, in one embodiment of the present application, before obtaining the target engine speed, the method further includes: calculating an engine speed line with acceptable NVH at each preset vehicle speed based on vehicle NVH simulation / test data.

[0047] It should be noted that the embodiments of the present application conduct vehicle NVH simulation tests to determine the engine speed line L3 with acceptable NVH at various vehicle speeds. Furthermore, the embodiments of the present application can interpolate the engine speed line with acceptable NVH at various vehicle speeds according to the actual vehicle speed when the vehicle is actually running, so as to obtain the target engine speed, thereby effectively ensuring the accuracy of the obtained engine speed line with acceptable NVH at various vehicle speeds and the target engine speed.

[0048] In step S102, the target charging power is calculated according to the target engine speed based on a preset range extender optimal economy line, preset emission constraint power lines at various engine speeds, preset NVH acceptable power lines at various speeds, and preset wheel-end required power lines at various vehicle speeds.

[0049] After obtaining the target engine speed based on the engine speed line with acceptable NVH at each vehicle speed according to the actual vehicle speed, the embodiments of the present application can further combine parameters such as the range extender's optimal economy line, the emission constraint power line at each engine speed, the NVH acceptable power line at each speed, and the entire wheel-end required power line at each vehicle speed to obtain the target charging power, thereby effectively taking into account performance such as power, fuel consumption, emissions, and NVH.

[0050] Optionally, in one embodiment of the present application, before calculating the target charging power, it also includes: calculating the comprehensive efficiency of the range extender based on the universal characteristic data of the engine simulation or bench test, and the efficiency data of the motor simulation or bench test; calculating the lowest energy consumption speed at each power based on the comprehensive efficiency, and generating a preset optimal economic line for the range extender.

[0051] It should be noted that the embodiment of the present application can test the universal characteristic data and efficiency data through the engine simulation bench, and calculate the comprehensive efficiency of the range extender (engine and generator) through the two sets of data, such as Figure 2 As shown, the speed with the lowest energy consumption at each power is calculated to obtain the optimal economic line of the range extender. As a result, the embodiment of the present application fully considers economic factors such as fuel consumption before calculating the target charging power, effectively improving the economy and reliability of the oil-electric distribution method of the series hybrid electric vehicle.

[0052] Optionally, in one embodiment of the present application, before calculating the target charging power, the method further includes: calculating the emission constraint power line at each preset engine speed based on the original emission data of the engine from the engine simulation or bench test.

[0053] It should be noted that the embodiments of the present application can test the original engine emission data through an engine simulation bench and calculate the emission constraint power line at each engine speed, so that the oil-electric distribution method of the embodiments of the present application takes into account the vehicle emission performance and improves the environmental protection level of the vehicle.

[0054] Optionally, in one embodiment of the present application, before calculating the target charging power, it also includes: calculating the NVH acceptable power line at each preset speed based on the whole vehicle NVH simulation / test data; and / or, calculating the wheel end required power line at each preset vehicle speed based on the whole vehicle simulation / test data.

[0055] It can be understood that the embodiments of the present application can calculate the acceptable NVH power line at each preset speed based on the whole vehicle NVH simulation test data, and determine the required power line of the whole wheel end at each vehicle speed based on the whole vehicle simulation test data, so that the oil-electric distribution method of the embodiment of the present application can further ensure the vehicle's power performance on the basis of taking into account indicators such as emissions and fuel consumption.

[0056] Optionally, in one embodiment of the present application, the target charging power is calculated as follows:

[0057] P=max(min(L1(N),L2(N),L4(N)),L5(N)),

[0058] Among them, L1 is the optimal economy line of the range extender, L2 is the emission constraint power line, L4 is the NVH power line, and L5 is the required power line of the entire wheel end.

[0059] It should be noted that, in the embodiment of the present application, the optimal economy line of the range extender, the emission constraint power line, the NVH power line, and the required power line of the entire wheel end can be interpolated according to the target speed, and the target charging power can be calculated using the interpolation results using the following formula:

[0060] P=max(min(L1(N),L2(N),L4(N)),L5(N))

[0061] Among them, L1 is the optimal economy line of the range extender, L2 is the emission constraint power line, L4 is the NVH power line, L5 is the required power line of the entire wheel end, N is the target speed, and P is the target charging power.

[0062] As a result, the oil-electricity distribution method of the series hybrid vehicle of the embodiment of the present application can balance multiple performance indicators such as emissions, NVH, and electrical balance, further improve the distribution strategy, and enhance vehicle reliability.

[0063] In step S103 , the target torque is calculated according to the target engine speed and the target charging power, and the power generation operating point of the engine is obtained based on the target torque.

[0064] After obtaining the target charging power based on the target engine speed, the range extender's optimal economy line, the emission constraint power line at each engine speed, the NVH acceptable power line at each speed, and the wheel-end required power line at each vehicle speed, the embodiment of the present application can further calculate the target torque based on the target engine speed and the target charging power, thereby obtaining the engine's power generation operating point, such as Figure 3 shown.

[0065] Optionally, in one embodiment of the present application, the target torque is calculated as follows:

[0066]

[0067] Wherein, N is the target speed and P is the target charging power.

[0068] It should be noted that, in the embodiment of the present application, the target torque can be calculated by the target speed and the target charging power according to the following formula:

[0069]

[0070] Thus, the engine's power generation operating point (N, T) is obtained.

[0071] It can be understood that the embodiments of the present application can determine the engine power generation operating point by calculating the range extender's optimal economy line, emission constraint power line, NVH speed line, NVH power line and the entire wheel end demand power line, so that the embodiments of the present application balance the emissions, NVH and electrical balance performance while taking into account power and fuel consumption, thereby effectively improving the reliability of the vehicle.

[0072] According to the oil-electric distribution method for a series hybrid electric vehicle proposed in an embodiment of the present application, the actual vehicle speed of the series hybrid electric vehicle is collected, and the target engine speed is obtained based on the actual vehicle speed and the preset NVH acceptable engine speed line at each vehicle speed; the target charging power is calculated based on the target engine speed based on the preset range extender optimal economy line, the preset emission constraint power line at each engine speed, the preset NVH acceptable power line at each speed, and the preset wheel-end demand power line at each vehicle speed; the target torque is calculated based on the target engine speed and the target charging power, and the engine power generation operating point is obtained based on the target torque. The present application determines the engine power generation operating point by calculating the range extender optimal economy line, the emission constraint power line, the NVH speed line, the NVH power line, and the wheel-end demand power line, thereby adjusting the oil-electric distribution strategy to effectively balance emissions, NVH, and electrical balance performance while considering power and fuel consumption, thereby improving the overall performance and competitiveness of the vehicle.

[0073] Second, with reference to the drawings described according to the application embodiment of the series hybrid electric vehicle oil and electricity distribution device.

[0074] Figure 4 Is the block diagram of the series hybrid electric vehicle oil and electricity distribution device of the application embodiment.

[0075] As Figure 4 The series hybrid electric vehicle oil and electricity distribution device 10 includes: acquisition module 100, first calculation module 200 and acquisition module 300.

[0076] Among them, the acquisition module 100 is used to collect the actual speed of the series hybrid electric vehicle, and to obtain the target engine speed based on the preset engine speed line of NVH acceptable under each speed according to the actual speed;

[0077] The first calculation module 200 is used to calculate the target charging power based on the preset range extender optimal economic line, the preset emission constraint power line under each engine speed, the preset NVH acceptable power line under each speed and the preset vehicle wheel end demand power line under each speed according to the target engine speed; and

[0078] The acquisition module 300 is used to calculate the target torque according to the target engine speed and the target charging power, and to obtain the engine power generation working condition point based on the target torque.

[0079] Optionally, in an embodiment of the application, the calculation formula of the target torque is:

[0080]

[0081] Wherein, N is the target speed, P is the target charging power.

[0082] Optionally, in an embodiment of the application, the calculation formula of the target charging power is:

[0083] P = max (min (L1 (N), L2 (N), L4 (N)), L5 (N)),

[0084] Wherein, L1 is the range extender optimal economic line, L2 is the emission constraint power line, L4 is the NVH power line, and L5 is the vehicle wheel end demand power line.

[0085] Optionally, in an embodiment of the application, the series hybrid electric vehicle oil and electricity distribution device 10 of the application embodiment further comprises: second calculation module and generation module.

[0086] The second calculation module is configured to calculate the comprehensive efficiency of the range extender based on the universal characteristic data of the engine simulation or bench test and the efficiency data of the motor simulation or bench test before calculating the target charging power;

[0087] The generation module is used to calculate the lowest energy consumption speed at each power based on the comprehensive efficiency and generate the preset optimal economy line of the range extender.

[0088] Optionally, in one embodiment of the present application, the oil-electric distribution device 10 of the series hybrid electric vehicle of the embodiment of the present application further includes: a third calculation module, which is used to calculate the emission constraint power line at each preset engine speed based on the engine simulation or bench test engine original emission data before calculating the target charging power.

[0089] Optionally, in one embodiment of the present application, the oil-electric distribution device 10 of the series hybrid electric vehicle of the embodiment of the present application further includes: a fourth calculation module and a fifth calculation module.

[0090] The fourth calculation module is configured to calculate the acceptable NVH power line at each preset speed based on the vehicle NVH simulation / test data before calculating the target charging power; and / or

[0091] The fifth calculation module is used to calculate the required power line of the entire wheel end at each preset vehicle speed based on the vehicle simulation / test data.

[0092] Optionally, in one embodiment of the present application, the oil-electric distribution device 10 of the series hybrid electric vehicle of the embodiment of the present application further includes: a sixth calculation module, which is used to calculate the engine speed line with acceptable NVH at each preset vehicle speed based on the vehicle NVH simulation / test data before obtaining the target engine speed.

[0093] It should be noted that the above explanation of the embodiment of the oil-electricity distribution method of a series hybrid electric vehicle is also applicable to the oil-electricity distribution device of the series hybrid electric vehicle of this embodiment, and will not be repeated here.

[0094] According to the oil-electric distribution device of a series hybrid electric vehicle proposed in an embodiment of the present application, the actual vehicle speed of the series hybrid electric vehicle is collected, and the target engine speed is obtained based on the actual vehicle speed and the preset NVH acceptable engine speed line at each vehicle speed; the target charging power is calculated based on the target engine speed based on the preset range extender optimal economy line, the preset emission constraint power line at each engine speed, the preset NVH acceptable power line at each speed, and the preset wheel-end demand power line at each vehicle speed; the target torque is calculated based on the target engine speed and the target charging power, and the engine power generation operating point is obtained based on the target torque. The present application determines the engine power generation operating point by calculating the range extender optimal economy line, the emission constraint power line, the NVH speed line, the NVH power line, and the wheel-end demand power line, thereby adjusting the oil-electric distribution strategy to effectively balance emissions, NVH, and electrical balance performance while considering power and fuel consumption, thereby improving the overall performance and competitiveness of the vehicle.

[0095] Figure 5 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0096] Memory 501 , processor 502 , and computer programs stored in the memory 501 and executable on the processor 502 .

[0097] When the processor 502 executes the program, the oil-electricity distribution method for the series hybrid electric vehicle provided in the above embodiment is implemented.

[0098] Furthermore, the vehicle further comprises:

[0099] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0100] The memory 501 is used to store computer programs that can be run on the processor 502 .

[0101] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0102] If the memory 501, processor 502, and communication interface 503 are implemented independently, the communication interface 503, memory 501, and processor 502 can be connected to each other via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0103] Optionally, in a specific implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 can communicate with each other through an internal interface.

[0104] The processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0105] This embodiment further provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the above-mentioned oil-electricity distribution method for a series hybrid electric vehicle is implemented.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0107] Moreover, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of indicated technical features. Thus, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0108] Any process or method descriptions or descriptions of the flow diagrams described herein, or otherwise described herein, can be understood as representing at least one of the steps of a method implemented with one or more computers, as well as or in place of a possible process. The description of a process or method that includes for example, steps, can also be understood to refer to an apparatus or system configured to perform said process or method, and vice versa, and vice versa, and each such process or method can be implemented by such an apparatus or system for performing this process or method. The scope of claims, however, can specify limitations in addition to those of the process or method described or otherwise claimed.

[0109] The logic and / or steps represented in the flow diagrams described herein, or otherwise described herein, for example, can be considered as a list of executable instructions for implementing the logic function, and can be specifically embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus or device, such as a computer-based system, a processor-based system, or other system that can fetch the instructions from the instruction execution system, apparatus or device and execute the instructions, or in conjunction with these instructions. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transport a program for use by or in connection with an instruction execution system, apparatus or device, or in conjunction with these instructions. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connections having one or more wires (electronic devices), portable computer diskette (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). In addition, a computer-readable medium can even be paper or other suitable medium on which the program can be printed, as the program can be electronically obtained from the paper or other suitable medium, by optically scanning the paper or other suitable medium, then editing, interpreting or otherwise processing the electronically obtained program to store it in a computer memory.

[0110] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiment, the N steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0111] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0112] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0113] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for distributing oil and electricity in a series hybrid electric vehicle, characterized in that: The following steps are involved: Acquiring an actual vehicle speed of the series hybrid vehicle, and obtaining a target engine speed based on the actual vehicle speed and a preset engine speed line with acceptable NVH at various vehicle speeds; Before obtaining the target engine speed, the oil-electric distribution method for a series hybrid electric vehicle further includes: calculating an engine speed line with acceptable NVH at each preset vehicle speed based on vehicle NVH simulation / test data; Calculating a target charging power based on the target engine speed, a preset range extender optimal economy line, a preset emission constraint power line at each engine speed, a preset NVH acceptable power line at each speed, and a preset wheel-end required power line at each vehicle speed; and The target charging power is calculated as follows: ， Among them, L1 is the optimal economy line of the range extender, L2 is the emission constraint power line, L4 is the NVH power line, and L5 is the required power line at the wheel end; calculating a target torque according to the target engine speed and the target charging power, and obtaining an engine power generation operating point based on the target torque; The target torque is calculated as follows: ， Wherein, N is the target speed, P is the target charging power; Before calculating the target charging power, the oil-electricity distribution method for a series hybrid electric vehicle further includes: Calculate the overall efficiency of the range extender based on engine simulation or bench test universal characteristic data and motor simulation or bench test efficiency data; Calculate the lowest energy consumption speed at each power based on the comprehensive efficiency, and generate the preset range extender optimal economy line; Before calculating the target charging power, the oil-electricity distribution method for a series hybrid electric vehicle further includes: Calculating the emission constraint power line at each preset engine speed based on engine simulation or bench test engine original emission data; Before calculating the target charging power, the oil-electricity distribution method for a series hybrid electric vehicle further includes: Calculating the NVH acceptable power line at each preset speed based on vehicle NVH simulation / test data; And / or, the wheel-end power requirement line at each preset vehicle speed is calculated based on vehicle simulation / test data.

2. A series hybrid electric vehicle oil-electric distribution device, characterized in that: include: an acquisition module for acquiring an actual vehicle speed of the series hybrid vehicle and obtaining a target engine speed based on the actual vehicle speed and a preset engine speed line with acceptable NVH at various vehicle speeds; a first calculation module, configured to calculate a target charging power based on the target engine speed, a preset range extender optimal economy line, preset emission constraint power lines at various engine speeds, preset NVH acceptable power lines at various speeds, and preset wheel-end required power lines at various vehicle speeds; as well as an acquisition module, configured to calculate a target torque according to the target engine speed and the target charging power, and to acquire a power generation operating point of the engine based on the target torque; The target torque is calculated as follows: ， Wherein, N is the target speed, P is the target charging power; The target charging power is calculated as follows: ， Among them, L1 is the optimal economy line of the range extender, L2 is the emission constraint power line, L4 is the NVH power line, and L5 is the required power line at the wheel end; The oil-electric distribution device of the series hybrid electric vehicle further includes: a second calculation module for calculating the comprehensive efficiency of the range extender based on universal characteristic data of the engine simulation or bench test and efficiency data of the motor simulation or bench test before calculating the target charging power; a generation module for calculating the minimum energy consumption speed at each power based on the comprehensive efficiency to generate the preset optimal economy line of the range extender; The oil-electric distribution device of the series hybrid electric vehicle further includes: a third calculation module for calculating the emission constraint power line at each preset engine speed based on engine simulation or bench test engine original emission data before calculating the target charging power; The oil-electric distribution device of the series hybrid electric vehicle further includes: a fourth calculation module for calculating the NVH acceptable power line at each preset speed based on vehicle NVH simulation / test data before calculating the target charging power; and / or a fifth calculation module for calculating the wheel-end required power line at each preset vehicle speed based on vehicle simulation / test data; The oil-electric distribution device of the series hybrid electric vehicle also includes: a sixth calculation module, which is used to calculate the engine speed line with acceptable NVH at each preset vehicle speed based on the vehicle NVH simulation / test data before obtaining the target engine speed.

3. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the oil-electricity distribution method for a series hybrid electric vehicle as claimed in claim 1.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the oil-electricity distribution method for a series hybrid electric vehicle as claimed in claim 1 .

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