Fuel consumption reduction control system for hybrid electric vehicle
By designing an intelligent control system in hybrid vehicles, and optimizing the drive mode based on parameters such as SOC value, throttle opening, load and slope, the problem of high fuel consumption caused by small power battery capacity is solved, and fuel consumption is reduced and range is improved. Improve the economy and intelligence of new energy vehicles.
Patent Information
- Application Number
- CN202421089733.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The power battery capacity of hybrid vehicles is small, which causes the engine to participate in power output for a long time when driving at long distances, which increases fuel consumption and affects the vehicle's economy and environmental performance.
A fuel consumption reduction control system for hybrid vehicles was designed. Through the coordination of the vehicle controller and the drive motor and engine, the drive mode is intelligently selected according to the parameters such as SOC value, throttle opening, load and slope, and optimized power output and reduced Energy waste and useless power recovery.
It effectively reduces the fuel consumption of hybrid vehicles, improves the vehicle's range and practicality, reduces the cost of using cars, and improves the intelligence of new energy vehicles.
Smart Images
Figure CN222291710U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hybrid vehicles, and in particular to a fuel consumption reduction control system for hybrid vehicles. Background Art
[0002] With economic development and improved living standards, the sales and ownership of automobiles are increasing. With the development of environmental protection activities such as "low-carbon travel, energy conservation and emission reduction" and "green travel", the necessity and urgency of automobile energy conservation and emission reduction are becoming more prominent.
[0003] Hybrid models have become the best choice for users, especially truck users.
[0004] Since the power battery capacity of hybrid vehicles is relatively small, the engine still needs to be used for a long time to output power when driving long distances. Therefore, in order to reduce the cost of using the car, how to reduce the fuel consumption of hybrid vehicles is still a key issue of concern. Utility Model Content
[0005] The present application provides a fuel consumption reduction control system for a hybrid vehicle to at least solve one technical problem existing in the related art.
[0006] According to one aspect of an embodiment of the present application, a fuel consumption reduction control system for a hybrid vehicle is provided, comprising: a vehicle controller, and a drive motor and an engine connected to the vehicle controller; and also comprising: a drive mode selection module; the drive mode selection module comprises:
[0007] SOC acquisition submodule: connected to the vehicle controller, configured to acquire an SOC value; the vehicle controller is configured to control the drive motor to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is greater than a first preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is less than the first preset value;
[0008] Throttle opening acquisition submodule: connected to the vehicle controller and configured to acquire the throttle opening value; the vehicle controller is configured to control the drive motor to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is less than a second preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is greater than a first preset value.
[0009] As an optional implementation, it also includes: a vehicle load acquisition module for acquiring the vehicle load and a slope acquisition module for acquiring the slope of a driving section, which are respectively connected to the vehicle controller.
[0010] As an optional implementation, the vehicle load acquisition module includes a load sensor; the slope acquisition module includes a slope sensor.
[0011] As an optional implementation, it also includes: a driving mode selection module, which is connected to the vehicle controller and is configured to determine the driving mode based on the SOC value acquired by the SOC acquisition submodule, the throttle opening value acquired by the throttle opening acquisition module, the vehicle load acquired by the vehicle load acquisition module, and the slope acquired by the slope acquisition module.
[0012] As an optional implementation, the driving mode selection module includes: an economic mode submodule, an automatic gear selection submodule and a driving mode submodule.
[0013] As an optional implementation manner, the automatic gear selection submodule is configured to determine the driving gear according to the SOC value.
[0014] As an optional implementation, the driving mode submodule is configured to determine the driving mode according to the current power and current torque requirements of the vehicle.
[0015] As an optional implementation, the driving modes include an engine driving mode, a drive motor generating engine driving mode, and a drive motor and engine driving mode.
[0016] In an embodiment of the present application, a fuel consumption reduction control system for a hybrid vehicle is provided, including: a drive mode selection module; the drive mode selection module includes: an SOC acquisition submodule: connected to the vehicle controller and configured to acquire an SOC value; the vehicle controller is configured to control the drive motor to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is greater than a first preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is less than the first preset value; a throttle opening acquisition submodule: connected to the vehicle controller and configured to acquire an throttle opening value; the vehicle controller is configured to control the drive motor to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is less than a second preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is greater than the first preset value. The drive motor and the engine cooperate to drive the vehicle according to the SOC value and the throttle opening value, which can reduce the starting time of the vehicle. The setting of the first preset value and the second preset value can enable the drive motor to drive the vehicle when the battery power is sufficient and the throttle opening is small, that is, the power demand is low, thereby achieving the purpose of reducing energy consumption. At the same time, the engine can also drive the vehicle when the drive motor cannot drive the vehicle independently, thereby ensuring the driving quality of the vehicle while achieving the purpose of reducing energy consumption, thereby improving the practicality and intelligence of hybrid new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0019] Figure 1 It is a modular schematic diagram of a fuel consumption reduction control system for a hybrid vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION
[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0021] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0022] like Figure 1 As shown, the embodiment of the present application provides a fuel consumption reduction control system for a hybrid vehicle, including: a vehicle controller, and a drive motor and an engine connected to the vehicle controller; and also includes: a drive mode selection module; the drive mode selection module includes:
[0023] SOC acquisition submodule: connected to the vehicle controller and configured to acquire the SOC value; the vehicle controller is configured to control the drive motor to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is greater than a first preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is less than the first preset value; throttle opening acquisition submodule: connected to the vehicle controller and configured to acquire the throttle opening value; the vehicle controller is configured to control the drive motor to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is less than a second preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is greater than the first preset value.
[0024] Specifically, the drive motor and the engine cooperate to drive the vehicle according to the SOC value and the throttle opening value, which can reduce the starting time of the vehicle. The setting of the first preset value and the second preset value can enable the drive motor to drive the vehicle when the battery power is sufficient and the throttle opening is small, that is, the power demand is low, thereby achieving the purpose of reducing energy consumption. At the same time, the engine can also drive the vehicle when the drive motor cannot drive the vehicle independently, thereby ensuring the driving quality of the vehicle while achieving the purpose of reducing energy consumption, thereby improving the practicality and intelligence of hybrid new energy vehicles.
[0025] As an optional implementation, it also includes: a vehicle load acquisition module for acquiring the vehicle load and a slope acquisition module for acquiring the slope of a driving section, which are respectively connected to the vehicle controller.
[0026] As an optional implementation, the vehicle load acquisition module includes a load sensor; the slope acquisition module includes a slope sensor.
[0027] As an optional implementation, it also includes: a driving mode selection module, which is connected to the vehicle controller and is configured to determine the driving mode based on the SOC value acquired by the SOC acquisition submodule, the throttle opening value acquired by the throttle opening acquisition module, the vehicle load acquired by the vehicle load acquisition module, and the slope acquired by the slope acquisition module.
[0028] As an optional implementation, the driving mode selection module includes: an economic mode submodule, an automatic gear selection submodule and a driving mode submodule.
[0029] As an optional embodiment, the automatic gear selection submodule is configured to determine the driving gear according to the SOC value. Specifically, the automatic gear selection submodule is configured to automatically adjust the current gear according to information such as the driving speed. For example: control the vehicle to start purely electric through the drive motor, and adjust the engine intervention timing according to the SOC obtained by the SOC acquisition submodule. The higher the SOC, the higher the gearbox gear that the engine cuts into the drive. When SOC≤Φ1, the engine does not start when the power-on preparation is completed. When the gear is engaged, the engine is started immediately, and the vehicle starts and drives in parallel with the starting gear to prevent over-discharge of the power battery; when Φ1<SOC≤Φ2, when the vehicle is running and switched to the n gear, the engine starts and drives. By analogy, when the SOC is at different set values, it is cut into and driven in other gears such as n+1 gear and n+2 gear.
[0030] As an optional implementation, the driving mode submodule is configured to determine the driving mode according to the current power and current torque requirements of the vehicle.
[0031] As an optional implementation, the driving modes include an engine driving mode, a drive motor generating engine driving mode, and a drive motor and engine driving mode.
[0032] Specifically, the driving mode submodule can require the engine to always work at the optimal working point according to the current power and torque requirements. When the engine power working at the optimal working point can only meet the driving requirements, it only provides driving drive; when the power is sufficient and there is surplus power, the engine drives, and uses the surplus power to drive the motor to generate electricity to replenish the power of the power battery; when the power is insufficient, the drive motor assists the engine in power output. In addition, the vehicle can also be equipped with a large-stroke brake pedal, which has both coasting energy recovery and braking energy recovery functions. As the vehicle decelerates or the braking demand increases, the driver recovers braking energy through the brake pedal. The vehicle model is equipped with a large-stroke brake pedal, and different energy recovery schemes are adopted according to different pedal openings to increase braking energy recovery. The braking energy recovery process is: braking idle stroke stage-motor braking stage-compound braking stage. Braking idle stroke stage. There is no braking when the brake pedal is pressed in this stage. In the motor braking stage, it is necessary to allocate appropriate recovery torque according to the drive motor speed and the brake pedal opening value to increase the recovery power and recover as much braking energy as possible. During the compound braking stage, the vehicle controller will calculate according to the driver's braking needs, and then reasonably allocate motor braking and mechanical braking, with motor braking as auxiliary. The two complement each other and brake in coordination to meet the requirements of maximizing vehicle braking energy recovery, braking safety, and driving comfort.
[0033] In addition, for models with air brakes, you can use the engine's built-in air pump or a high-pressure air pump to inflate. For models equipped with an electric air pump: when the brake air pressure is less than the set threshold, the electric air pump starts and begins to replenish air, and stops immediately after the set threshold. For models equipped with an engine-equipped air pump: when the brake air pressure is less than the set threshold, the engine starts, and at the same time drives the air pump to start replenishing air. When the engine starts and replenishes air, regardless of whether it is in hybrid drive mode or pure electric drive mode at this time, the vehicle immediately switches to a hybrid drive mode with the engine as the main drive and the drive motor as the auxiliary drive, and starts the driving power generation function at the same time. After replenishing air to the set threshold, the vehicle confirms whether to exit the hybrid drive mode based on the current driving speed, gear position and other working conditions.
[0034] The present application reduces the fuel consumption of hybrid vehicles and improves the range of the entire vehicle by reducing energy waste and recovering useless power, thereby effectively solving the current problem of high fuel consumption of hybrid vehicles, increasing the range of the entire vehicle and reducing vehicle use costs.
[0035] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.
[0036] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more electronic devices (such as personal computers, servers, or network devices) to perform all or part of the steps of the methods described in the various embodiments of the present application.
[0037] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0038] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0039] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.
[0040] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0041] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.
[0042] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A fuel consumption reduction control system for a hybrid vehicle, characterized in that: include: A vehicle controller, a power battery, and a drive motor and an engine connected to the vehicle controller; It also includes: a driving mode selection module; the driving mode selection module includes: SOC acquisition submodule: connected to the vehicle controller and the power battery respectively, and configured to acquire the SOC value; the vehicle controller is configured to control the drive motor to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is greater than a first preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the SOC value acquired by the SOC acquisition submodule is less than the first preset value; Throttle opening acquisition submodule: connected to the vehicle controller and configured to acquire the throttle opening value; the vehicle controller is configured to control the drive motor to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is less than a second preset value, and to control the engine, or the engine and the drive motor, to drive the vehicle when the throttle opening value acquired by the throttle opening acquisition module is greater than a first preset value.
2. The hybrid vehicle fuel consumption reduction control system according to claim 1, characterized in that: Also includes: A vehicle load acquisition module for acquiring the vehicle load and a slope acquisition module for acquiring the slope of a driving section are respectively connected to the vehicle controller.
3. The hybrid vehicle fuel consumption reduction control system according to claim 2, characterized in that: The vehicle load acquisition module includes a load sensor; the slope acquisition module includes a slope sensor.
4. The fuel consumption reduction control system for a hybrid vehicle as claimed in claim 2, characterized in that: Also includes: The driving mode selection module is connected to the vehicle controller and is configured to determine the driving mode according to the SOC value obtained by the SOC acquisition submodule, the throttle opening value obtained by the throttle opening acquisition module, the vehicle load obtained by the vehicle load acquisition module, and the slope obtained by the slope acquisition module.
5. The fuel consumption reduction control system for a hybrid vehicle as claimed in claim 4, characterized in that: The driving mode selection module includes: an economic mode submodule, an automatic gear selection submodule and a driving mode submodule.
6. The fuel consumption reduction control system for a hybrid vehicle as claimed in claim 5, characterized in that: The gear automatic selection submodule is configured to determine the driving gear according to the SOC value.
7. The fuel consumption reduction control system for a hybrid vehicle as claimed in claim 5, characterized in that: The driving mode submodule is configured to determine the driving mode according to the current power and current torque requirements of the vehicle.
8. The hybrid vehicle fuel consumption reduction control system according to claim 7, characterized in that: The driving modes include an engine driving mode, a drive motor generating engine driving mode, and a drive motor and engine driving mode.