A hybrid engine economic region calculation method and device, a terminal and a storage medium

Abstract

This invention relates to a method, device, terminal, and storage medium for calculating the economic zone of a hybrid engine. Based on the performance analysis of different hybrid systems and key components, this invention provides guidance for preliminary performance analysis. First, based on the configuration and operating characteristics, considering the system's highest charge / discharge efficiency and the engine's universal characteristics, the engine's economic zone is quickly defined for comparative engine analysis. Then, considering generator efficiency and matching with the engine's universal characteristics, the engine's economic zone is calculated, supporting generator matching and selection. The economic zone can be divided according to the efficiency and performance differences of the system at different temperatures, obtaining the engine's operating economic zone at different temperatures. Finally, considering the influence of power generation strategies and operating conditions, the engine's economic zone is optimized. This invention derives the engine's economic zone based on forward theoretical analysis, providing theoretical support for system and strategy optimization. The invention's calculations are simple, conveniently and quickly supporting preliminary analysis work and providing a foundation for subsequent strategy calibration.

Description

Technical Field

[0001] This invention belongs to the field of automotive technology, specifically a method, device, terminal, and storage medium for calculating the economic zone of a hybrid engine. Background Technology

[0002] As the automotive industry accelerates its transformation towards new energy vehicles, the market share of hybrid vehicles is increasing year by year. The core of their energy-saving strategy is to adjust the engine's operating point through electric drive assistance to ensure that the engine operates in the economic zone to achieve energy-saving effects. The division of the engine's economic zone, i.e., the allowable operating zone of the engine, is the core of the strategy. Currently, there are studies analyzing engine operation strategies, but most of them rely on experience or optimization algorithms to directly perform optimization calculations, which cannot provide theoretical support for system and strategy optimization, and lack a simple and systematic calculation method to support the preliminary analysis work. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a method, apparatus, terminal, and storage medium for calculating the economic zone of a hybrid engine. It analyzes the engine's operating economic zone based on the performance of different hybrid systems and key components, providing guidance for preliminary performance analysis. Furthermore, it derives and delineates the engine's economic zone based on forward theoretical analysis, providing theoretical support for system and strategy optimization. This invention is simple to calculate, conveniently and quickly supporting preliminary analysis work, and provides a foundation for subsequent strategy calibration.

[0004] The technical solution of this invention is described below in conjunction with the accompanying drawings:

[0005] In a first aspect, embodiments of the present invention provide a method for calculating the economic zone of a hybrid engine, comprising the following steps:

[0006] Step 1: Consider the system's highest charging and discharging efficiency, and divide the engine's optimal economic zone fuel consumption range according to the battery's charging and discharging efficiency level and the engine's universal characteristics. Then, define the engine speed economic zone in series mode based on the specific fuel consumption range.

[0007] Step 2: Divide the engine's optimal economic zone specific fuel consumption range by dividing the engine's optimal specific fuel consumption corresponding to the optimal series drive efficiency by the parallel drive efficiency, and define the engine's speed and torque economic zone in parallel mode based on the specific fuel consumption range.

[0008] Step 3: Based on the generator efficiency characteristics and the engine universal characteristics, couple them to obtain the engine power generation universal characteristics, and use this to divide the economic zone under the series-parallel mode, and perform generator-engine matching analysis.

[0009] Step 4: Considering the performance differences of various power system components when the vehicle is running at different temperatures, calculate the engine's economic zone at different temperatures based on the battery charging and discharging efficiency, generator efficiency, drive motor efficiency, and engine universal characteristics at different temperatures.

[0010] Step 5: Based on the comprehensive operating conditions, calculate the engine's economic zone under specific power generation conditions. With the goal of minimizing the sum of engine power generation fuel consumption and direct drive fuel consumption, calculate the power generation energy and direct drive energy allocation ratio in the economic zone according to the comprehensive operating conditions. The economic zone range is then calculated based on the direct drive energy in the economic zone and the characteristics of the comprehensive operating conditions.

[0011] Furthermore, in step one, the optimal specific fuel consumption point under different power is calculated based on the universal characteristics of the engine;

[0012] Based on the operating conditions of the series-mode engine, the economic zone is defined as where the direct-drive economy of the engine's power generation is better than the optimal power generation efficiency. That is, the specific fuel consumption range of the economic zone is calculated by dividing the engine's optimal specific fuel consumption point by the battery's charge and discharge efficiency. The economic zone range is then defined by combining the specific fuel consumption range of the economic zone.

[0013] Furthermore, in step two, the optimal series drive efficiency is the product of the generator efficiency and the electric drive efficiency, and the optimal specific fuel consumption of the engine is calculated by dividing the optimal series drive efficiency.

[0014] Based on the operating conditions of the parallel-mode engine, the economic zone is defined as the one where the direct-drive fuel consumption of the engine is better than that of the optimal series drive. The speed and torque of the economic zone are then determined based on the range of the fuel consumption ratio within the economic zone.

[0015] Furthermore, in step three, the generator efficiency map and the universal characteristics of the engine are coupled to obtain the engine power generation ratio fuel consumption characteristics. At this time, the engine economic zone is redefined based on the engine power generation ratio fuel consumption characteristics.

[0016] Furthermore, in step four, based on the performance differences of each system at different temperatures, the engine economic zone calculation at different temperatures is repeated to obtain the engine economic zone at different temperatures.

[0017] Furthermore, in step five, the energy required from the engine is calculated based on the energy demand and recovered energy under the operating conditions. The energy provided by the engine is divided into power generation energy and direct drive energy. The direct drive economic zone and direct drive energy corresponding to different engine economic zones are calculated. The direct drive fuel consumption value at this time is calculated based on the fuel consumption ratio at the operating point within the direct drive operating zone.

[0018] The energy provided by the engine minus the direct drive energy equals the energy generated. The fuel consumption required to generate the energy is calculated based on the selected power generation operating point and the corresponding fuel consumption ratio.

[0019] Under the condition of a defined power generation operating condition, the engine direct drive operating condition zone, i.e. the engine economic zone, is determined with the goal of minimizing the sum of engine direct drive fuel consumption and power generation fuel consumption.

[0020] Secondly, embodiments of the present invention also provide a hybrid engine economic zone calculation device, comprising:

[0021] The first division module is used to consider the highest charging and discharging efficiency of the system, divide the optimal economic zone of the engine based on the battery charging and discharging efficiency level and the universal characteristics of the engine, and define the speed economic zone of the engine in series mode based on the specific fuel consumption range.

[0022] The second division module is used to divide the engine's optimal economic zone specific fuel consumption range according to the engine's optimal specific fuel consumption corresponding to the optimal series drive efficiency divided by the parallel drive efficiency, and to define the engine's speed and torque economic zone in parallel mode according to the specific fuel consumption range.

[0023] The third partitioning module is used to obtain the universal characteristics of engine power generation by coupling the generator efficiency characteristics and the engine universal characteristics, and to divide the economic zone in the series-parallel mode for generator-engine matching analysis.

[0024] The first calculation module is used to take into account the performance differences of various components of the power system when the vehicle is running at different temperatures, and to calculate the engine's economic zone at different temperatures based on the battery charging and discharging efficiency, generator efficiency, drive motor efficiency and engine universal characteristics at different temperatures.

[0025] The second calculation module is used to calculate the engine's economic zone under specific power generation conditions based on comprehensive operating conditions. With the goal of minimizing the sum of engine power generation fuel consumption and direct drive fuel consumption, it calculates the power generation energy and direct drive energy allocation ratio in the economic zone according to comprehensive operating conditions, and calculates the economic zone range based on the direct drive energy in the economic zone and the characteristics of comprehensive operating conditions.

[0026] Thirdly, a terminal is provided, including:

[0027] One or more processors;

[0028] Memory for storing the one or more processor-executable instructions;

[0029] Wherein, the one or more processors are configured as follows:

[0030] Perform the method described in the first aspect of the embodiments of the present invention.

[0031] Fourthly, a non-transitory computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to perform the method described in the first aspect of the present invention.

[0032] Fifthly, an application product is provided, which, when running on a terminal, causes the terminal to execute the method described in the first aspect of the present invention.

[0033] The beneficial effects of this invention are as follows:

[0034] 1) In the early stages of vehicle selection and strategy development, this invention analyzes the engine's economic operating zone based on the performance of different hybrid systems and key components, providing guidance for early performance analysis. First, based on the configuration's working characteristics, considering the system's highest charging and discharging efficiency and the engine's universal characteristics, the engine's economic zone is quickly defined for comparative engine analysis.

[0035] 2) This invention considers the matching of generator efficiency and engine universal characteristics to perform engine economic zone analysis and calculation, supporting generator matching and selection;

[0036] 3) This invention can divide the economic zone according to the efficiency and performance differences of the system at different temperatures, obtain the engine operating economic zone at different temperatures, and finally perform engine economic zone optimization calculation considering the power generation strategy and operating condition effects.

[0037] 4) This invention derives the engine economic zone based on forward theoretical analysis, providing theoretical support for system and strategy optimization;

[0038] 5) The present invention is simple to calculate and can conveniently and quickly support the preliminary analysis work, and provide a basis for subsequent calibration strategies. Attached Figure Description

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of a hybrid engine economic zone calculation method according to the present invention;

[0041] Figure 2 This is a schematic diagram of the engine's economic zone under series operating conditions (the area within the orange box).

[0042] Figure 3 This is a schematic diagram of the engine's economic zone under parallel operation (the area within the orange box).

[0043] Figure 4 A schematic diagram of the economic zone for engine power generation (area within the orange box);

[0044] Figure 5 A schematic diagram of the economic zone for cryogenic engine power generation (area within the orange box);

[0045] Figure 6 This is a schematic diagram of WLTC power operation.

[0046] Figure 7 This is a schematic diagram of the structure of a hybrid engine economic zone calculation device according to the present invention;

[0047] Figure 8 This is a schematic block diagram of a terminal structure. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] Example 1

[0051] Figure 1 This is a flowchart of a hybrid engine economic zone calculation method provided in Embodiment 1 of the present invention. This embodiment is applicable to the calculation of the economic zone of a hybrid engine. The method can be executed by a hybrid engine economic zone calculation device in this embodiment of the present invention, which can be implemented in software and / or hardware.

[0052] See Figure 1 A method for calculating the economic zone of a hybrid engine includes the following steps:

[0053] S1. Series-based basic economic zone analysis considering optimal power generation efficiency:

[0054] according to Figure 2 As shown, an engine universal characteristic diagram is plotted, and the engine's optimal specific fuel consumption is calculated. Considering that all electrical energy consumption under the state of maintaining the battery charge will eventually be replenished by fuel, there are two working conditions in the series mode: the current generator directly drives the drive motor or the generator charges the battery and then the battery discharges to drive the drive motor. Considering that the point where the generator charges the battery with the highest efficiency is the point of optimal specific fuel consumption, the corresponding specific fuel consumption boundary of the series economic zone is the optimal specific fuel consumption / the average charge and discharge efficiency of the battery. Based on the specific fuel consumption boundary, the economic zone of the engine in series mode can be defined.

[0055] S2. Analysis of the basic economic zone of parallel connection considering optimal series drive efficiency:

[0056] according to Figure 3 As shown, the universal characteristic diagram of the engine and the optimal specific fuel consumption of the engine are generated. Considering that all electrical energy consumption under the state of maintaining the battery charge will eventually be replenished by fuel, there are two working conditions in parallel mode: the current engine directly drives the battery or the engine generator charges the battery and then the battery discharges to drive the drive motor. The efficiency difference is the difference between the engine direct drive efficiency and the series generator drive efficiency. That is, the specific fuel consumption boundary of the parallel economic zone is the optimal specific fuel consumption / series generator drive efficiency / engine direct drive efficiency, where the series generator drive efficiency = generator average power generation efficiency * drive motor average drive efficiency. The economic zone of the engine parallel mode can be defined based on the specific fuel consumption boundary.

[0057] S3. Calculation of the economic zone based on generator efficiency:

[0058] Further comprehensive consideration should be given to the impact of generator and engine matching on the engine's economic zone, such as... Figure 4 The generator efficiency is coupled with the universal characteristics of the engine to obtain the universal diagram of engine power generation and the optimal specific fuel consumption point for power generation. Based on the universal diagram of engine power generation, the specific fuel consumption range of the series-parallel economic zone is recalculated, and the economic zone of the engine series-parallel mode is defined.

[0059] S4. Calculation of economic zones considering performance temperature differences:

[0060] Further consideration should be given to the performance differences of each system at different temperatures, such as the charging of the battery at different temperatures.

[0061]

[0062] Discharge efficiency varies; therefore, based on the performance differences of the battery, motor, and engine at different temperatures, the above steps are followed to calculate the economic zone of the engine in series and parallel operation at different temperatures, taking series as an example. Figure 5 As shown, this provides a reference for formulating hybrid strategies.

[0063] S5. Optimization calculation of economic zone based on comprehensive operating conditions and power generation strategy:

[0064] Further considering the differences in power generation operating conditions, an economic zone optimization calculation is performed under specific comprehensive operating conditions. Based on the operating condition calculation, the required energy 'a' and recovered energy 'b' are obtained. With the battery level maintained, the engine needs to provide energy 'c' = ab. The engine's required energy 'c' is divided into the engine's direct-drive energy 'c1' and the power generation energy 'c2'. Given a determined power generation operating condition, the corresponding power generation ratio fuel consumption is obtained. Based on the comprehensive operating condition characteristics and the engine's economic zone, the direct-drive area energy 'c1' and corresponding fuel consumption can be analyzed as follows: Figure 6As shown, where variable c1 = c - c2, different engine fuel consumptions can be obtained by adjusting the power generation energy. Engine fuel consumption = power generation fuel consumption + economic direct drive fuel consumption. By comparing, the value c1 corresponding to the minimum engine fuel consumption is obtained. As shown in Table 1, the optimized engine economic zone is obtained through comparison.

[0065] Table 1 Comparison of Optimal Economic Zones for Engines

[0066] Example 2

[0067] See Figure 7 A hybrid engine economic zone calculation device, comprising:

[0068] The first division module is used to consider the highest charging and discharging efficiency of the system, divide the optimal economic zone of the engine based on the battery charging and discharging efficiency level and the universal characteristics of the engine, and define the speed economic zone of the engine in series mode based on the specific fuel consumption range.

[0069] The second division module is used to divide the engine's optimal economic zone specific fuel consumption range according to the engine's optimal specific fuel consumption corresponding to the optimal series drive efficiency divided by the parallel drive efficiency, and to define the engine's speed and torque economic zone in parallel mode according to the specific fuel consumption range.

[0070] The third partitioning module is used to obtain the universal characteristics of engine power generation by coupling the generator efficiency characteristics and the engine universal characteristics, and to divide the economic zone in the series-parallel mode for generator-engine matching analysis.

[0071] The first calculation module is used to take into account the performance differences of various components of the power system when the vehicle is running at different temperatures, and to calculate the engine's economic zone at different temperatures based on the battery charging and discharging efficiency, generator efficiency, drive motor efficiency and engine universal characteristics at different temperatures.

[0072] The second calculation module is used to calculate the engine's economic zone under specific power generation conditions based on comprehensive operating conditions. With the goal of minimizing the sum of engine power generation fuel consumption and direct drive fuel consumption, it calculates the power generation energy and direct drive energy allocation ratio in the economic zone according to comprehensive operating conditions, and calculates the economic zone range based on the direct drive energy in the economic zone and the characteristics of comprehensive operating conditions.

[0073] Example 3

[0074] Figure 8 This is a structural block diagram of a terminal provided in an embodiment of this application. The terminal can be the terminal described in the above embodiments. The terminal can be a portable mobile terminal, such as a smartphone or tablet computer. The terminal may also be referred to as user equipment, portable terminal, or other names.

[0075] Typically, a terminal includes a processor 301 and a memory 302.

[0076] Processor 301 may include one or more processing cores, such as a quad-core processor or an octa-core processor. Processor 301 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 301 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 301 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 301 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0077] The memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. The memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 302 are used to store at least one instruction, which is executed by the processor 301 to implement a hybrid engine economic zone calculation method provided in this application.

[0078] In some embodiments, the terminal may also optionally include: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes at least one of: a radio frequency circuit 304, a touch display screen 305, a camera 306, an audio circuit 307, a positioning component 308, and a power supply 309.

[0079] The peripheral device interface 303 can be used to connect at least one I / O (Input / Output) related peripheral device to the processor 301 and the memory 302. In some embodiments, the processor 301, memory 302, and peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, memory 302, and peripheral device interface 303 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0080] The radio frequency (RF) circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 304 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The RF circuit 304 can communicate with other terminals through at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 304 may also include circuitry related to NFC (Near Field Communication), which is not limited in this application.

[0081] The touch display screen 305 is used to display a UI (User Interface). This UI may include graphics, text, icons, videos, and any combination thereof. The touch display screen 305 also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to the processor 301 for processing. The touch display screen 305 is used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, there may be one touch display screen 305, which serves as the front panel of the terminal; in other embodiments, there may be at least two touch display screens, respectively disposed on different surfaces of the terminal or in a folded design; in still other embodiments, the touch display screen 305 may be a flexible display screen, disposed on a curved or folded surface of the terminal. Furthermore, the touch display screen 305 may be configured as a non-rectangular, irregular shape, i.e., a non-rectangular screen. The touch display screen 305 may be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode).

[0082] Camera assembly 306 is used to acquire images or videos. Optionally, camera assembly 306 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is used for video calls or selfies, and the rear-facing camera is used for taking photos or videos. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, and a wide-angle camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, and panoramic shooting and VR (Virtual Reality) shooting by fusion of the main camera and the wide-angle camera. In some embodiments, camera assembly 306 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash is a combination of a warm light flash and a cool light flash, which can be used for light compensation at different color temperatures.

[0083] Audio circuit 307 provides an audio interface between the user and the terminal. Audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, converting the sound waves into electrical signals that are input to processor 301 for processing, or input to radio frequency circuit 304 for voice communication. For stereo sound acquisition or noise reduction purposes, multiple microphones may be used, each located in a different part of the terminal. The microphone may also be an array microphone or an omnidirectional microphone. The speaker is used to convert electrical signals from processor 301 or radio frequency circuit 304 into sound waves. The speaker may be a conventional diaphragm speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can convert electrical signals not only into audible sound waves but also into inaudible sound waves for purposes such as distance measurement. In some embodiments, audio circuit 307 may also include a headphone jack.

[0084] The positioning component 308 is used to determine the current geographic location of the terminal in order to enable navigation or LBS (Location Based Service). The positioning component 308 can be a positioning component based on the US GPS (Global Positioning System), China's BeiDou system, or Russia's Galileo system.

[0085] Power supply 309 is used to power the various components in the terminal. Power supply 309 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When power supply 309 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired line, while a wireless rechargeable battery is a battery that is charged via a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0086] Those skilled in the art will understand that Figure 8The structure shown does not constitute a limitation on the terminal and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0087] Example 4

[0088] In an exemplary embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements a hybrid engine economic zone calculation method as provided in all embodiments of the present application.

[0089] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0090] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0091] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0092] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0093] Example 5

[0094] In an exemplary embodiment, an application product is also provided, including one or more instructions that can be executed by the processor 301 of the aforementioned device to complete the aforementioned method for calculating the economic zone of a hybrid engine.

[0095] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the invention. Further modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method for calculating the economic zone of a hybrid engine, characterized in that, Includes the following steps: Step 1: Consider the system's highest charging and discharging efficiency, and divide the engine's optimal economic zone fuel consumption range according to the battery's charging and discharging efficiency level and the engine's universal characteristics. Then, define the engine speed economic zone in series mode based on the specific fuel consumption range. Step 2: Divide the engine's optimal economic zone specific fuel consumption range by dividing the engine's optimal specific fuel consumption corresponding to the optimal series drive efficiency by the parallel drive efficiency, and define the engine's speed and torque economic zone in parallel mode based on the specific fuel consumption range. Step 3: Based on the generator efficiency characteristics and the engine universal characteristics, couple them to obtain the engine power generation universal characteristics, and use this to divide the economic zone under the series-parallel mode, and perform generator-engine matching analysis. Step 4: Considering the performance differences of various power system components when the vehicle is running at different temperatures, calculate the engine's economic zone at different temperatures based on the battery charging and discharging efficiency, generator efficiency, drive motor efficiency, and engine universal characteristics at different temperatures. Step 5: Based on the comprehensive operating conditions, calculate the engine's economic zone under specific power generation conditions. With the goal of minimizing the sum of engine power generation fuel consumption and direct drive fuel consumption, calculate the power generation energy and direct drive energy allocation ratio in the economic zone according to the comprehensive operating conditions. The economic zone range is then calculated based on the direct drive energy in the economic zone and the characteristics of the comprehensive operating conditions.

2. The method for calculating the economic zone of a hybrid engine according to claim 1, characterized in that, In step one, the optimal specific fuel consumption point under different power is calculated based on the universal characteristics of the engine. Based on the operating conditions of the series-mode engine, the economic zone is defined as where the direct-drive economy of the engine's power generation is better than the optimal power generation efficiency. That is, the specific fuel consumption range of the economic zone is calculated by dividing the engine's optimal specific fuel consumption point by the battery's charge and discharge efficiency. The economic zone range is then defined by combining the specific fuel consumption range of the economic zone.

3. The method for calculating the economic zone of a hybrid engine according to claim 1, characterized in that, In step two, the optimal series drive efficiency is the product of the generator efficiency and the electric drive efficiency. The optimal specific fuel consumption of the engine is calculated by dividing the optimal series drive efficiency. Based on the operating conditions of the parallel-mode engine, the economic zone is defined as the one where the direct-drive fuel consumption of the engine is better than that of the optimal series drive. The speed and torque of the economic zone are then determined based on the range of the fuel consumption ratio within the economic zone.

4. The method for calculating the economic zone of a hybrid engine according to claim 1, characterized in that, In step three, the generator efficiency map and the universal characteristics of the engine are coupled to obtain the engine power generation ratio fuel consumption characteristics. At this time, the engine economic zone is redefined based on the generator power generation ratio fuel consumption characteristics.

5. The method for calculating the economic zone of a hybrid engine according to claim 1, characterized in that, In step four, based on the performance differences of each system at different temperatures, the engine economic zone calculation is repeated at different temperatures to obtain the engine economic zone at different temperatures.

6. The method for calculating the economic zone of a hybrid engine according to claim 1, characterized in that, In step five, the energy required from the engine is calculated based on the energy demand and energy recovery under the operating conditions. The energy provided by the engine is divided into power generation energy and direct drive energy. The direct drive economic zone and direct drive energy corresponding to different engine economic zones are calculated. The direct drive fuel consumption value is calculated based on the fuel consumption ratio at the operating point within the direct drive operating zone. The energy provided by the engine minus the direct drive energy equals the energy generated. The fuel consumption required to generate the energy is calculated based on the selected power generation operating point and the corresponding fuel consumption ratio. Under the condition of a defined power generation operating condition, the engine direct drive operating condition zone, i.e. the engine economic zone, is determined with the goal of minimizing the sum of engine direct drive fuel consumption and power generation fuel consumption.

7. A hybrid engine economic zone calculation device, characterized in that, include: The first division module is used to consider the highest charging and discharging efficiency of the system, divide the optimal economic zone of the engine based on the battery charging and discharging efficiency level and the universal characteristics of the engine, and define the speed economic zone of the engine in series mode based on the specific fuel consumption range. The second division module is used to divide the engine's optimal economic zone specific fuel consumption range according to the engine's optimal specific fuel consumption corresponding to the optimal series drive efficiency divided by the parallel drive efficiency, and to define the engine's speed and torque economic zone in parallel mode according to the specific fuel consumption range. The third partitioning module is used to obtain the universal characteristics of engine power generation by coupling the generator efficiency characteristics and the engine universal characteristics, and to divide the economic zone in the series-parallel mode for generator-engine matching analysis. The first calculation module is used to take into account the performance differences of various components of the power system when the vehicle is running at different temperatures, and to calculate the engine's economic zone at different temperatures based on the battery charging and discharging efficiency, generator efficiency, drive motor efficiency and engine universal characteristics at different temperatures. The second calculation module is used to calculate the engine's economic zone under specific power generation conditions based on comprehensive operating conditions. With the goal of minimizing the sum of engine power generation fuel consumption and direct drive fuel consumption, it calculates the power generation energy and direct drive energy allocation ratio in the economic zone according to comprehensive operating conditions, and calculates the economic zone range based on the direct drive energy in the economic zone and the characteristics of comprehensive operating conditions.

8. A terminal, characterized in that, include: One or more processors; Memory for storing the one or more processor-executable instructions; Wherein, the one or more processors are configured as follows: Perform the hybrid engine economic zone calculation method as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the terminal's processor, the terminal is able to execute a hybrid engine economic zone calculation method as described in any one of claims 1 to 6.

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