A control method and related device for a hybrid vehicle

Abstract

The present invention discloses a control method and related equipment for a hybrid vehicle, relating to the technical field of hybrid vehicle control. The present invention 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 required energy. The method includes: obtaining the throttle pedal opening and driving gradient of the hybrid vehicle in real time; determining the real-time driving speed and real-time driving state of the vehicle based on the obtained real-time throttle pedal opening and real-time driving gradient; determining the driving state of the vehicle according to the state of charge of the battery of the hybrid vehicle and the real-time driving state, and judging the required energy mode of the vehicle; and switching the vehicle energy mode in real time according to the judgment result of the vehicle required energy mode to complete the control of the hybrid vehicle energy mode.

Description

Technical Field

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

[0002] The statements in this part only provide background technical 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 worldwide. Hybrid vehicles driven by an electric motor as an auxiliary power source for the engine have emerged due to their good fuel economy and environmental friendliness. Hybrid vehicles have two power sources, an engine and an electric motor, and are combined with a storage battery as an energy storage to perform good matching and optimization control, which can give full play to the advantages of pure electric vehicles and traditional vehicles, and become the most research-significant low-emission and low-fuel-consumption vehicles today.

[0004] Energy mode management is a key technology for improving the fuel economy of hybrid vehicles. The energy modes of hybrid vehicles generally include pure electric mode and engine and motor hybrid drive mode, etc. Existing energy mode management strategies have problems such as poor fuel economy of the whole vehicle caused by frequent switching between multiple modes; at the same time, due to the relatively fixed existing engine intervention and withdrawal strategies, which are related to the technical level and experience of calibration engineers, and cannot take into account factors such as driver driving habits and road conditions, the whole vehicle cannot operate in the most suitable energy mode; the problem of overall vehicle energy mode management and allocation with frequent switching of power modes in hybrid vehicles cannot be fundamentally solved. 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 throttle 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 considering the required energy.

[0006] According to some embodiments, the first solution of the present invention provides a control method for a hybrid vehicle, adopting the following technical solution:

[0007] A control method for a hybrid vehicle includes:

[0008] Obtain the throttle pedal opening and driving slope of the hybrid vehicle in real time;

[0009] Based on the obtained real-time throttle pedal opening and real-time driving slope, determine the real-time driving speed and real-time driving state of the vehicle;

[0010] Determine the driving state of the vehicle according to the state of charge of the battery of the hybrid vehicle and the real-time driving state, and judge the required energy mode of the vehicle;

[0011] According to the judgment result of the required energy mode of the vehicle, switch the energy mode of the vehicle in real time to complete the control of the energy mode of the hybrid vehicle;

[0012] Wherein, the real-time driving state of the vehicle at least includes flat driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving;

[0013] The driving state of the vehicle at least includes a first driving state, a second driving state and a third driving state.

[0014] As a further technical limitation, based on the obtained real-time accelerator pedal opening and real-time driving gradient, determine the real-time driving speed of the vehicle; according to the obtained real-time driving speed and real-time driving gradient, as well as the preset first vehicle speed, second vehicle speed and gradient threshold, determine the real-time driving state of the vehicle; wherein, when the real-time driving gradient is within the gradient 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 low speed; when the real-time driving speed is greater than the second vehicle speed, it is defined as the vehicle driving at 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.

[0015] As a further technical limitation, when the vehicle is driving uphill or at low speed, the vehicle is in the first driving state and continues to maintain the current required energy mode of the vehicle.

[0016] As a further technical limitation, when the vehicle is driving downhill and not at low speed, or the vehicle is driving on flat ground at medium speed, the vehicle is in the second driving state and adjusts the required energy mode of the current vehicle to the pure electric mode.

[0017] As a further technical limitation, when the vehicle is driving on flat ground at high speed, the vehicle is in the third driving state and determines the required energy mode of the vehicle by judging the state of charge of the vehicle battery.

[0018] Further, when the state of charge of the vehicle battery is not less than the preset state of charge of the battery, adjust the required energy mode of the current vehicle to the pure electric mode; when the state of charge of the vehicle battery is less than the preset state of charge of the battery, adjust the required energy mode of the current vehicle to the hybrid mode and execute the gear shifting to neutral command.

[0019] According to some embodiments, the second solution of the present invention provides a control system for a hybrid vehicle, adopting the following technical solution:

[0020] A control system for a hybrid vehicle, comprising:

[0021] An acquisition module configured to acquire the throttle pedal opening and the driving gradient of the hybrid vehicle in real time;

[0022] A determination module configured to determine the real-time driving speed and the real-time driving state of the vehicle based on the obtained real-time throttle pedal opening and the real-time driving gradient;

[0023] A judgment module configured to determine the driving state of the vehicle and judge the required energy mode of the vehicle according to the state of charge of the battery of the hybrid vehicle and the real-time driving state;

[0024] A control module configured to switch the vehicle energy mode in real time according to the judgment result of the vehicle required energy mode, and complete the control of the hybrid vehicle energy mode;

[0025] Wherein, the real-time driving state of the vehicle at least includes flat driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving;

[0026] The driving state of the vehicle at least includes a first driving state, a second driving state and a third driving state.

[0027] According to some embodiments, the third aspect of the present invention provides a computer-readable storage medium, adopting the following technical solution:

[0028] A computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the steps in the control method of the hybrid vehicle as described in the first aspect of the present invention are implemented.

[0029] According to some embodiments, the fourth aspect of the present invention provides an electronic device, adopting the following technical solution:

[0030] An electronic device, comprising a memory, a processor, and a program stored on the memory and running on the processor, and when the processor executes the program, the steps in the control method of the hybrid vehicle as described in the first aspect of the present invention are implemented.

[0031] According to some embodiments, the fifth aspect of the present invention provides a computer program product, adopting the following technical solution:

[0032] A computer program product, comprising software code, and the program in the software code executes the steps in the control method of the hybrid vehicle as described in the first aspect of the present invention.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] The present invention fully considers the throttle pedal opening, real-time vehicle speed, and real-time driving gradient of a hybrid vehicle, determines the operating state of the hybrid vehicle, and completes the control of the hybrid vehicle considering the required energy; it controls the vehicle to drive purely electrically under a suitable SOC threshold and suitable road conditions and vehicle speeds, effectively avoiding frequent engine startups, improving the fuel economy of the whole vehicle while ensuring comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The specification drawings forming a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments and descriptions thereof of this embodiment are used to explain this embodiment and do not constitute an improper limitation on this embodiment.

[0036] Figure 1 It is a flowchart of a control method for a hybrid vehicle in Embodiment 1 of the present invention;

[0037] Figure 2 It is a structural block diagram of a control system for a hybrid vehicle in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention will be further described below in conjunction with the drawings and embodiments.

[0039] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanations for the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the 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 also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship words determined for the convenience of describing the structural relationship of each component or element of the present invention and do not specifically refer to any component or element of the present invention and should not be construed as a limitation on the present invention.

[0042] In the present invention, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may 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 it should not be construed as a limitation to the present invention.

[0043] Term Explanation:

[0044] SOC: State of Charge of the battery;

[0045] ModEnrgDes: Demand Energy Mode;

[0046] PMT: Pure Electric Mode;

[0047] HYD: Hybrid Mode;

[0048] FlgNGr: Neutral Gear Command.

[0049] Without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0050] Embodiment 1

[0051] Embodiment 1 of the present invention introduces a control method for a hybrid vehicle.

[0052] As Figure 1 shown, a control method for a hybrid vehicle includes:

[0053] Obtain the throttle pedal opening and driving gradient of the hybrid vehicle in real time;

[0054] Based on the obtained real-time throttle pedal opening and real-time driving gradient, determine the real-time driving speed and real-time driving state of the vehicle;

[0055] According to the state of charge of the battery of the hybrid vehicle and the real-time driving state, determine the driving state of the vehicle and judge the demand energy mode of the vehicle;

[0056] According to the judgment result of the vehicle demand energy mode, switch the vehicle energy mode in real time to complete the control of the hybrid vehicle energy mode;

[0057] Among them, the real-time driving state of the vehicle at least includes flat driving, uphill driving, downhill driving, low-speed driving, medium-speed driving and high-speed driving;

[0058] The driving state of the vehicle at least includes a first driving state, a second driving state and a third driving state.

[0059] In this embodiment, a pedal sensor and an inclination sensor are provided on the studied hybrid vehicle to obtain the throttle pedal opening and the driving gradient of the vehicle in real time. It should be noted that during the driving processes of uphill driving, flat driving, and downhill driving of the vehicle with different driving gradients, the vehicle's own weight needs to be considered. Therefore, at different driving gradients, the driving speeds of the vehicle obtained with the same throttle pedal opening are different.

[0060] In this embodiment, according to the preset first vehicle speed v1, second vehicle speed v2, and gradient threshold p1, combined with the real-time driving speed V and real-time driving gradient P of the vehicle, the real-time driving state of the vehicle is judged. Among them, when the real-time driving gradient is within the gradient threshold p1 range, 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.

[0061] It should be noted that the first vehicle speed v1, second vehicle speed v2, and gradient threshold p1 need to be determined according to the own attributes of the hybrid vehicle, and the first vehicle speed v1, second vehicle speed v2, and gradient threshold p1 of different vehicles are different.

[0062] The relationship between the real-time driving speed V and 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.

[0063] Table 1 Relationship between gradient and vehicle speed

[0064]

[0065] Combined with Table 1, it can be obtained that:

[0066] (1) The first driving state

[0067] When the hybrid vehicle is driving uphill (p1 < P) or driving at a low speed (V < v1), the hybrid vehicle has no execution action, that is, it continues to maintain the current required energy mode of the hybrid vehicle;

[0068] (2) The second driving state

[0069] When the hybrid vehicle is driving downhill and the vehicle is not driving at a low speed (P < -p1 and v1 ≤ V), or is driving on flat ground at a medium speed (v1 ≤ V ≤ v2 and -p1 ≤ P ≤ p1), the hybrid vehicle executes the action "ModEnrgDes = PMT", that is, adjusts the current required energy mode of the hybrid vehicle to the pure electric mode;

[0070] (3) The third driving state

[0071] When the hybrid vehicle is traveling on a flat road at 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 required 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 performs the action "ModEnrgDes = PMT", that is, adjusts the current required 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 performs the action "ModEnrgDes = HYD & FlgNGr = 1", adjusts the current required energy mode of the hybrid vehicle to the hybrid mode and executes the gear return to neutral command.

[0072] 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 hybrid vehicle under study.

[0073] 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 required 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.

[0074] Embodiment 2

[0075] Embodiment 2 of the present invention introduces a control system for a hybrid vehicle.

[0076] As Figure 2 shown, a control system for a hybrid vehicle includes:

[0077] An acquisition module configured to acquire the throttle pedal opening and driving gradient of the hybrid vehicle in real time;

[0078] A determination module configured to determine the real-time driving speed and real-time driving state of the vehicle based on the obtained real-time throttle pedal opening and real-time driving gradient;

[0079] A judgment module configured to determine the driving state of the vehicle and judge the required energy mode of the vehicle according to the state of charge of the hybrid vehicle's battery and the real-time driving state;

[0080] A control module configured to switch the vehicle energy mode in real time according to the judgment result of the vehicle required energy mode and complete the control of the hybrid vehicle energy mode;

[0081] Among them, the real-time driving state of the vehicle at least includes driving on flat ground, uphill driving, downhill driving, low-speed driving, medium-speed driving, and high-speed driving;

[0082] The driving state of the vehicle at least includes a first driving state, a second driving state, and a third driving state.

[0083] The detailed steps are the same as those of a control method for a hybrid vehicle provided in Embodiment 1, and will not be elaborated here.

[0084] Embodiment 3

[0085] Embodiment 3 of the present invention provides a computer-readable storage medium.

[0086] A computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, it implements the steps in a control method for a hybrid vehicle as described in Embodiment 1 of the present invention.

[0087] The detailed steps are the same as those of a control method for a hybrid vehicle provided in Embodiment 1, and will not be elaborated here.

[0088] Embodiment 4

[0089] Embodiment 4 of the present invention provides an electronic device.

[0090] An electronic device includes a memory, a processor, and a program stored on the memory and running on the processor. When the processor executes the program, it implements the steps in a control method for a hybrid vehicle as described in Embodiment 1 of the present invention.

[0091] The detailed steps are the same as those of a control method for a hybrid vehicle provided in Embodiment 1, and will not be elaborated here.

[0092] Embodiment 5

[0093] Embodiment 5 of the present invention provides a computer program product.

[0094] A computer program product includes software code, and the program in the software code executes the steps in a control method for a hybrid vehicle as described in Embodiment 1 of the present invention.

[0095] The detailed steps are the same as those of a control method for a hybrid vehicle provided in Embodiment 1, and will not be elaborated here.

[0096] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages. For example, object-oriented programming languages such as Java and interpreted scripting languages such as JavaScript, etc.

[0097] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows 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 the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0098] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0099] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0100] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0101] Obviously, those skilled in the art can make various modifications and variations 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 equivalent technologies, the present invention is also intended to include these modifications and variations.

[0102] The above are only the preferred embodiments of this example and are not used to limit this example. For those skilled in the art, this example can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this example shall be included within the protection scope of this example.

Claims

1. A control method for a hybrid vehicle, characterized in that, including: Obtain the throttle pedal opening and driving gradient of a hybrid vehicle in real time; Based on the obtained real-time throttle pedal opening and real-time driving gradient, determine the real-time driving speed of the vehicle; According to the obtained real-time driving speed and real-time driving gradient, as well as the preset first vehicle speed, second vehicle speed and gradient threshold, determine the real-time driving state of the vehicle; Wherein, when the real-time driving gradient is within the gradient 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. The first vehicle speed, the second vehicle speed and the gradient threshold are determined according to the own attributes of the hybrid vehicle, and the first vehicle speed, the second vehicle speed and the gradient threshold of different vehicles are different; According to the state of charge of the battery of the hybrid vehicle and the real-time driving state, determine the driving state of the vehicle and judge the required energy mode of the vehicle; According to the judgment result of the required energy mode of the vehicle, switch the vehicle energy mode in real time to complete the control of the energy mode of the hybrid vehicle; Wherein, the real-time driving state of the vehicle at least includes driving on flat ground, driving uphill, driving downhill, driving at a low speed, driving at a medium speed and driving at a high speed; The driving state of the vehicle at least includes a first driving state, a second driving state and a third driving state; Wherein, when the vehicle is driving uphill or at a low speed, the vehicle is in the first driving state and continues to maintain the current required energy mode of the vehicle; When the vehicle is driving downhill and not at a low speed, or when the vehicle is driving on flat ground at a medium speed, the vehicle is in the second driving state and adjusts the current required energy mode of the vehicle to the pure electric mode; When the vehicle is driving on flat ground at a high speed, the vehicle is in the third driving state and determines the required energy mode of the vehicle by judging the state of charge of the vehicle battery.

2. The control method of a hybrid vehicle according to claim 1, wherein When the state of charge of the vehicle battery is not less than the preset state of charge of the battery, adjust the current required energy mode of the vehicle to the pure electric mode; when the state of charge of the vehicle battery is less than the preset state of charge of the battery, adjust the current required energy mode of the vehicle to the hybrid mode and execute the neutral gear command.

3. A control system for a hybrid vehicle, characterized in that, including: An acquisition module configured to obtain the throttle pedal opening and driving gradient of a hybrid vehicle in real time; A determination module configured to determine the real-time driving speed of the vehicle based on the obtained real-time throttle pedal opening and real-time driving gradient, and determine the real-time driving state of the vehicle according to the obtained real-time driving speed and real-time driving gradient, as well as the preset first vehicle speed, second vehicle speed and gradient 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 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. The first vehicle speed, the second vehicle speed, and the slope threshold are determined according to the own attributes of the hybrid vehicle, and are different for different vehicles; A judgment module, which is configured to determine the driving state of the vehicle and judge the required energy mode of the vehicle according to the state of charge of the battery of the hybrid vehicle and the real-time driving state; A control module, which is configured to switch the energy mode of the vehicle in real time according to the judgment result of the required energy mode of the vehicle, and complete the control of the energy mode of the hybrid vehicle; Among them, the real-time driving state of the vehicle at least includes driving on flat ground, driving uphill, driving downhill, driving at a low speed, driving at a medium speed, and driving at a high speed; The driving state of the vehicle at least includes a first driving state, a second driving state, and a third driving state; Among them, when the vehicle is driving uphill or at a low speed, the vehicle is in the first driving state, and the current required energy mode of the vehicle is continued to be maintained; When the vehicle is driving downhill and not at a low speed, or when the vehicle is driving on flat ground at a medium speed, the vehicle is in the second driving state, and the current required energy mode of the vehicle is adjusted to the pure electric mode; When the vehicle is driving on flat ground at a high speed, the vehicle is in the third driving state, and the required energy mode of the vehicle is determined by judging the state of charge of the vehicle battery.

4. 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 described in any one of claims 1-2 are implemented.

5. An electronic device, comprising a memory, a processor, and a computer program stored on 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 as described in any one of claims 1-2 are implemented.

6. 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 as described in any one of claims 1-2.

Images