Control method of hybrid vehicle and related equipment

Abstract

The invention discloses a control method of a hybrid power vehicle and related equipment, relates to the technical field of hybrid power vehicle control, and fully considers the accelerator pedal opening degree, the real-time vehicle speed and the real-time running gradient of the hybrid power vehicle to judge the running state of the hybrid power vehicle. Control of a hybrid vehicle in consideration of required energy is completed. The method comprises the steps that the accelerator pedal opening degree and the driving gradient of the hybrid power vehicle are obtained in real time; based on the obtained real-time accelerator pedal opening degree and the real-time driving gradient, the real-time driving speed and the real-time driving state of the vehicle are determined; the driving state of the vehicle is determined according to the battery charge state and the real-time driving state of the hybrid power vehicle, and the energy demand mode of the vehicle is judged; and according to the judgment result of the vehicle demand energy mode, the vehicle energy mode is switched in real time, and control over the hybrid power vehicle energy mode is completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of hybrid vehicle control, and in particular relates to a control method and related equipment for a hybrid vehicle. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the intensification of the contradiction between the rapid growth of energy demand and the increasing scarcity of oil resources, energy conservation and emission reduction have attracted more and more attention from the world. Hybrid vehicles driven by electric motors as auxiliary power of the engine have emerged with their good fuel economy and environmental friendliness. Hybrid vehicles have two power sources, the engine and the motor, which are well matched and optimized with batteries as energy storage. They can give full play to the advantages of pure electric vehicles and transmission vehicles, and become the most research-worthy low-emission and low-fuel-consumption vehicles today.

[0004] Energy mode management is a key technology to improve the fuel economy of hybrid vehicles. The energy modes of hybrid vehicles generally include pure electric mode and engine and motor hybrid drive mode. The existing energy mode management strategy has the problem of poor vehicle fuel economy due to frequent switching between multiple modes; at the same time, because the existing engine intervention and exit strategies are relatively fixed, related to the technical level and experience of calibration engineers, and cannot take into account factors such as driver driving habits and road conditions, it is impossible to make the vehicle run in the most appropriate energy mode; it is unable to fundamentally solve the problem of energy mode management and allocation of hybrid vehicles with frequent switching of power modes. Summary of the invention

[0005] To solve the above problems, the present invention proposes a control method and related equipment for a hybrid vehicle, which fully considers the accelerator pedal opening, real-time vehicle speed and real-time driving slope of the hybrid vehicle, judges the operating state of the hybrid vehicle, and completes the control of the hybrid vehicle taking into account the required energy.

[0006] According to some embodiments, a first solution of the present invention provides a control method for a hybrid vehicle, which adopts the following technical solution: A control method for a hybrid vehicle, comprising: Obtain the accelerator pedal opening and driving slope of the hybrid vehicle in real time; Determine the real-time driving speed and real-time driving state of the vehicle based on the obtained real-time accelerator pedal opening and real-time driving slope; According to the battery charge state and real-time driving state of the hybrid vehicle, the driving state of the vehicle is determined, and the energy demand mode of the vehicle is judged; According to the judgment result of the vehicle demand energy mode, the vehicle energy mode is switched in real time to complete the control of the hybrid vehicle energy mode; The real-time driving state of the vehicle at least includes flat ground driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving; The driving state of the vehicle includes at least a first driving state, a second driving state and a third driving state.

[0007] As a further technical limitation, the real-time driving speed of the vehicle is determined based on the obtained real-time accelerator pedal opening and the real-time driving slope; the real-time driving state of the vehicle is determined based on the obtained real-time driving speed and the real-time driving slope, as well as the preset first vehicle speed, second vehicle speed and slope threshold; wherein, when the real-time driving slope is within the slope threshold range, it is defined as the vehicle driving on flat ground, otherwise it is defined as the vehicle driving uphill or downhill; when the real-time driving speed is less than the first vehicle speed, it is defined as the vehicle driving at a low speed; when the real-time driving speed is greater than the second vehicle speed, it is defined as the vehicle driving at a high speed; when the real-time driving speed is between the first vehicle speed and the second vehicle speed, it is defined as the vehicle driving at a medium speed.

[0008] As a further technical limitation, when the vehicle is traveling uphill or at a low speed, the vehicle is in a first driving state and continues to maintain the vehicle's current energy demand mode.

[0009] As a further technical limitation, when the vehicle is traveling downhill and is not traveling at a low speed, or when the vehicle is traveling on flat ground at a medium speed, the vehicle is in a second driving state, and the current energy demand mode of the vehicle is adjusted to a pure electric mode.

[0010] As a further technical limitation, when the vehicle is traveling on flat ground at high speed, the vehicle is in a third driving state, and the vehicle energy demand mode is determined by judging the charge state of the vehicle battery.

[0011] Furthermore, when the vehicle battery state of charge is not less than a preset battery state of charge, the current vehicle's required energy mode is adjusted to a pure electric mode; when the vehicle battery state of charge is less than a preset battery state of charge, the current vehicle's required energy mode is adjusted to a hybrid mode and a gear-shifting command is executed.

[0012] According to some embodiments, a second solution of the present invention provides a control system for a hybrid vehicle, which adopts the following technical solution: A control system for a hybrid vehicle, comprising: An acquisition module, which is configured to acquire the accelerator pedal opening and driving slope of the hybrid vehicle in real time; a determination module configured to determine a real-time driving speed and a real-time driving state of the vehicle based on the obtained real-time accelerator pedal opening and the real-time driving slope; A determination module configured to determine the driving state of the vehicle and determine the energy demand mode of the vehicle according to the battery state of charge and the real-time driving state of the hybrid vehicle; A control module configured to switch the vehicle energy mode in real time according to the determination result of the vehicle demand energy mode, so as to complete the control of the hybrid vehicle energy mode; The real-time driving state of the vehicle at least includes flat ground driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving; The driving state of the vehicle includes at least a first driving state, a second driving state and a third driving state.

[0013] According to some embodiments, a third solution of the present invention provides a computer-readable storage medium, which adopts the following technical solution: A computer-readable storage medium stores a program, which, when executed by a processor, implements the steps of the control method for a hybrid vehicle as described in the first embodiment of the present invention.

[0014] According to some embodiments, a fourth solution of the present invention provides an electronic device, which adopts the following technical solution: An electronic device comprises a memory, a processor and a program stored in the memory and running on the processor, wherein when the processor executes the program, the steps in the control method of a hybrid vehicle as described in the first embodiment of the present invention are implemented.

[0015] According to some embodiments, a fifth solution of the present invention provides a computer program product, which adopts the following technical solution: A computer program product comprises software codes, wherein the program in the software codes executes the steps in the control method of a hybrid vehicle according to the first embodiment of the present invention.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention fully considers the accelerator pedal opening, real-time vehicle speed and real-time driving slope of the hybrid vehicle, determines the operating state of the hybrid vehicle, and completes the control of the hybrid vehicle taking into account the required energy; controls the vehicle to run purely electrically at a suitable SOC threshold and suitable road conditions and vehicle speed, effectively avoiding frequent engine starting, improving the fuel economy of the vehicle while ensuring comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0018] Figure 1 This is a flow chart of a control method for a hybrid vehicle in Embodiment 1 of the present invention; Figure 2 This is a structural block diagram of a control system for a hybrid vehicle in Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention and should not be understood as limitations on the present invention.

[0023] In the present invention, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances, and they cannot be understood as limitations on the present invention.

[0024] Terminology explanation: SOC: battery state of charge; ModEnrgDes: demand energy mode; PMT: pure electric mode; HYD: Hybrid mode; FlgNGr: Gear unengaged command.

[0025] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0026] Embodiment 1 Embodiment 1 of the present invention introduces a control method for a hybrid vehicle.

[0027] like Figure 1 A control method for a hybrid vehicle is shown, comprising: Obtain the accelerator pedal opening and driving slope of the hybrid vehicle in real time; Determine the real-time driving speed and real-time driving state of the vehicle based on the obtained real-time accelerator pedal opening and real-time driving slope; According to the battery charge state and real-time driving state of the hybrid vehicle, the driving state of the vehicle is determined, and the energy demand mode of the vehicle is judged; According to the judgment result of the vehicle demand energy mode, the vehicle energy mode is switched in real time to complete the control of the hybrid vehicle energy mode; The real-time driving state of the vehicle at least includes flat ground driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving; The driving state of the vehicle includes at least a first driving state, a second driving state and a third driving state.

[0028] In this embodiment, a pedal sensor and an inclination sensor are arranged on the hybrid vehicle under study to obtain the accelerator pedal opening and driving slope of the vehicle in real time; it should be noted that the vehicle's own weight needs to be considered during the vehicle's uphill driving, flat driving and downhill driving at different driving slopes. Therefore, at different driving slopes, the vehicle's driving speed obtained by the same accelerator pedal opening is different.

[0029] This embodiment determines the real-time driving state of the vehicle based on the preset first vehicle speed v1, second vehicle speed v2 and slope threshold p1, combined with the vehicle's real-time driving speed V and real-time driving slope P; wherein, when the real-time driving slope is within the range of the slope threshold p1, it is defined as the vehicle driving on flat ground; when the real-time driving speed V is less than the first vehicle speed v1, it is defined as the vehicle driving at a low speed; when the real-time driving speed V is greater than the second vehicle speed v2, it is defined as the vehicle driving at a high speed; when the real-time driving speed V is between the first vehicle speed v1 and the second vehicle speed v2, it is defined as the vehicle driving at a medium speed.

[0030] It should be noted that the first vehicle speed v1, the second vehicle speed v2 and the slope threshold p1 need to be determined according to the properties of the hybrid vehicle itself, and the first vehicle speed v1, the second vehicle speed v2 and the slope threshold p1 are different for different vehicles.

[0031] The relationship between the real-time driving speed V and the real-time driving gradient P of the vehicle is shown in Table 1. Among them, "0" in the table represents the first driving state, "1" in the table represents the second driving state, and "2" in the table represents the third driving state.

[0032] Table 1 Relationship between gradient and vehicle speed

[0033] Combined with Table 1, it can be obtained that: (1) The first driving state When the hybrid vehicle is driving uphill (p1 < P) or at a low speed (V < v1), the hybrid vehicle has no execution action, that is, it continues to maintain the current demand energy mode of the hybrid vehicle; (2) The second driving state When the hybrid vehicle is driving downhill and not at a low speed (P < -p1 and v1 ≤ V), or when it is driving on a flat road at a medium speed (v1 ≤ V ≤ v2 and -p1 ≤ P ≤ p1), the hybrid vehicle executes the action "ModEnrgDes = PMT", that is, adjusts the current demand energy mode of the hybrid vehicle to the pure electric mode; (3) The third driving state When the hybrid vehicle is driving on a flat road at a high speed (v2 < V and -p1 ≤ P ≤ p1), it is necessary to first judge the state of charge of the hybrid vehicle's battery and then determine the vehicle's demand energy mode; when the state of charge of the hybrid vehicle's battery is not less than the preset state of charge of the battery, the hybrid vehicle executes the action "ModEnrgDes = PMT", that is, adjusts the current demand energy mode of the hybrid vehicle to the pure electric mode; when the state of charge of the hybrid vehicle's battery is less than the preset state of charge of the battery, the hybrid vehicle executes the action "ModEnrgDes = HYD & FlgNGr = 1", adjusts the current demand energy mode of the hybrid vehicle to the hybrid mode and executes the gear return to neutral command.

[0034] It should be noted that the preset state of charge of the battery is related to the battery of the hybrid vehicle and needs to be adaptively adjusted according to the studied hybrid vehicle.

[0035] This embodiment fully considers the throttle pedal opening, real-time vehicle speed, and real-time driving gradient of the hybrid vehicle, judges the operating state of the hybrid vehicle, and completes the control of the hybrid vehicle considering the demand energy; controls the vehicle to drive purely electrically under appropriate SOC thresholds and appropriate road conditions and vehicle speeds, effectively avoiding frequent engine starts, improving the fuel economy of the whole vehicle while ensuring comfort.

[0036] Embodiment 2 Embodiment 2 of the present invention introduces a control system for a hybrid vehicle.

[0037] like Figure 2 A control system of a hybrid vehicle is shown, comprising: An acquisition module, which is configured to acquire the accelerator pedal opening and driving slope of the hybrid vehicle in real time; a determination module configured to determine a real-time driving speed and a real-time driving state of the vehicle based on the obtained real-time accelerator pedal opening and the real-time driving slope; A determination module configured to determine the driving state of the vehicle and determine the energy demand mode of the vehicle according to the battery state of charge and the real-time driving state of the hybrid vehicle; A control module configured to switch the vehicle energy mode in real time according to the determination result of the vehicle demand energy mode, so as to complete the control of the hybrid vehicle energy mode; The real-time driving state of the vehicle at least includes flat ground driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving; The driving state of the vehicle includes at least a first driving state, a second driving state and a third driving state.

[0038] The detailed steps are the same as those of the control method for a hybrid vehicle provided in the first embodiment, and will not be repeated here.

[0039] Embodiment 3 Embodiment 3 of the present invention provides a computer-readable storage medium.

[0040] A computer-readable storage medium stores a program, which, when executed by a processor, implements the steps in a control method for a hybrid vehicle as described in Embodiment 1 of the present invention.

[0041] The detailed steps are the same as those of the control method for a hybrid vehicle provided in the first embodiment, and will not be repeated here.

[0042] Embodiment 4 A fourth embodiment of the present invention provides an electronic device.

[0043] An electronic device comprises a memory, a processor and a program stored in the memory and running on the processor, wherein when the processor executes the program, the steps in a control method for a hybrid vehicle as described in the first embodiment of the present invention are implemented.

[0044] The detailed steps are the same as those of the control method for a hybrid vehicle provided in the first embodiment, and will not be repeated here.

[0045] Embodiment 5 Embodiment 5 of the present invention provides a computer program product.

[0046] A computer program product includes software codes, wherein the program in the software codes executes the steps in a control method for a hybrid vehicle as described in the first embodiment of the present invention.

[0047] The detailed steps are the same as those of the control method for a hybrid vehicle provided in the first embodiment, and will not be repeated here.

[0048] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The solutions in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and interpreted scripting language JavaScript, etc.

[0049] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0050] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0051] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0052] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0054] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A control method for a hybrid vehicle, characterized in that: include: Obtain the accelerator pedal opening and driving slope of the hybrid vehicle in real time; Determine the real-time driving speed and real-time driving state of the vehicle based on the obtained real-time accelerator pedal opening and real-time driving slope; According to the battery charge state and real-time driving state of the hybrid vehicle, the driving state of the vehicle is determined, and the energy demand mode of the vehicle is judged; According to the judgment result of the vehicle demand energy mode, the vehicle energy mode is switched in real time to complete the control of the hybrid vehicle energy mode; The real-time driving state of the vehicle at least includes flat ground driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving; The driving state of the vehicle includes at least a first driving state, a second driving state and a third driving state.

2. A control method for a hybrid vehicle as claimed in claim 1, characterized in that: Determine the real-time driving speed of the vehicle based on the obtained real-time accelerator pedal opening and the real-time driving slope; determine the real-time driving state of the vehicle based on the obtained real-time driving speed and the real-time driving slope, as well as the preset first vehicle speed, second vehicle speed and slope threshold; Among them, when the real-time driving slope is within the slope threshold range, it is defined as the vehicle driving on flat ground, otherwise it is defined as the vehicle driving uphill or downhill; When the real-time driving speed is less than the first speed, it is defined as the vehicle is driving at a low speed; when the real-time driving speed is greater than the second speed, it is defined as the vehicle is driving at a high speed; When the real-time driving speed is between the first vehicle speed and the second vehicle speed, it is defined as the vehicle driving at medium speed.

3. A control method for a hybrid vehicle as claimed in claim 1, characterized in that: When the vehicle is traveling uphill or at a low speed, the vehicle is in a first driving state and continues to maintain the vehicle's current demand energy mode.

4. A control method for a hybrid vehicle as claimed in claim 1, characterized in that: When the vehicle is traveling downhill and not at a low speed, or when the vehicle is traveling on flat ground at a medium speed, the vehicle is in a second driving state, and the current energy demand mode of the vehicle is adjusted to a pure electric mode.

5. A control method for a hybrid vehicle as claimed in claim 1, characterized in that: When the vehicle is traveling on flat ground at high speed, the vehicle is in a third driving state, and the vehicle energy demand mode is determined by judging the charge state of the vehicle battery.

6. A control method for a hybrid vehicle as claimed in claim 5, characterized in that: When the vehicle battery state of charge is not less than the preset battery state of charge, the current vehicle's required energy mode is adjusted to the pure electric mode; when the vehicle battery state of charge is less than the preset battery state of charge, the current vehicle's required energy mode is adjusted to the hybrid mode and the gear shift command is executed.

7. A control system for a hybrid vehicle, characterized in that: include: An acquisition module, which is configured to acquire the accelerator pedal opening and driving slope of the hybrid vehicle in real time; a determination module configured to determine a real-time driving speed and a real-time driving state of the vehicle based on the obtained real-time accelerator pedal opening and the real-time driving slope; A determination module configured to determine the driving state of the vehicle and determine the energy demand mode of the vehicle according to the battery state of charge and the real-time driving state of the hybrid vehicle; A control module configured to switch the vehicle energy mode in real time according to the determination result of the vehicle demand energy mode, so as to complete the control of the hybrid vehicle energy mode; The real-time driving state of the vehicle at least includes flat ground driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving; The driving state of the vehicle includes at least a first driving state, a second driving state and a third driving state.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the control method of the hybrid vehicle as claimed in any one of claims 1 to 6 are implemented.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the steps of the control method of the hybrid vehicle according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising software code, characterized in that The program in the software code executes the steps of the control method of the hybrid vehicle according to any one of claims 1 to 6.

Images