Control method, vehicle-mounted controller and medium for alleviating power attenuation of hybrid vehicles
By identifying the road conditions in extreme usage scenarios and adjusting relevant control parameters, the problem of the acceleration capability of hybrid models in extreme environments is solved, and the power performance is significantly improved.
Patent Information
- Application Number
- CN202510160712.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-04-04
AI Technical Summary
Hybrid models have severely attenuated acceleration capabilities in extreme use scenarios (high temperature, plateau, and high cold), resulting in a decline in power performance.
The road conditions are identified through altitude, temperature and slope sensors, and the vehicle's battery balance SOC, gear shift line, mode switching working point and engine operating point are adjusted to alleviate power attenuation.
It effectively improves the acceleration capability of hybrid models in extreme usage scenarios and improves power performance.
Smart Images
Figure CN119749509A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of automobiles, and more specifically, to a control method, a vehicle-mounted controller and a medium for alleviating power attenuation in a hybrid vehicle. Background Art
[0002] With the substantial increase in the number of motor vehicles, users' demands for vehicle power performance in extreme usage scenarios (high temperature, high altitude, and severe cold) continue to increase, prompting vehicle manufacturers to continuously update and optimize vehicle component performance and control strategies to maximize power performance in extreme usage scenarios.
[0003] The current hybrid vehicle models are used in extreme scenarios (high temperature, high altitude, and severe cold), and their acceleration capabilities are much different from those in common plain conditions due to the influence of altitude, temperature, slope, etc.
[0004] Therefore, it is necessary to develop a control method for hybrid vehicles to alleviate power attenuation.
[0005] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention
[0006] The present invention proposes a control method for alleviating power attenuation of hybrid vehicles, which can identify altitude, temperature, slope, and vehicle speed through sensors, offset the battery balance power, shift line, and engine operating condition point, and solve the serious problem of acceleration ability attenuation of hybrid vehicles in extreme usage scenarios.
[0007] In a first aspect, an embodiment of the present disclosure provides a control method for alleviating power attenuation of a hybrid vehicle, comprising:
[0008] Identify road conditions based on altitude sensors, temperature sensors, and slope sensors;
[0009] According to the road conditions, the adjustment control parameters of the vehicle and the corresponding adjustment scheme are determined.
[0010] Preferably, identifying the road condition according to the altitude sensor, the temperature sensor, and the slope sensor includes:
[0011] Identifying the current altitude according to the altitude sensor;
[0012] Identify the slope size according to the slope sensor;
[0013] The temperature sensor includes an ambient temperature sensor and an intake manifold temperature sensor, wherein the ambient temperature sensor is used to identify the current ambient temperature, and the intake manifold temperature sensor is used to identify whether the temperature of air entering the engine meets the requirements.
[0014] Preferably, the adjustment control parameters include vehicle battery balance SOC, vehicle mode, vehicle shift line, and engine operating point.
[0015] Preferably, at least one of the battery balance SOC, the vehicle mode, and the engine operating point is adjusted according to the recognition result of the altitude sensor.
[0016] Preferably, the vehicle shift line is adjusted according to the recognition result of the slope sensor.
[0017] Preferably, the battery balancing SOC and / or the engine operating point are adjusted according to the identification result of the ambient temperature sensor.
[0018] Preferably, at least one of the battery balance SOC, the vehicle mode, and the engine operating point is adjusted according to the identification result of the intake manifold temperature sensor.
[0019] Preferably, if the same adjustment control parameter is adjusted for different road conditions, the maximum value of the adjustment values corresponding to the different road conditions is taken as the final adjustment value for the same adjustment control parameter.
[0020] In a second aspect, the embodiment of the present disclosure further provides a vehicle-mounted controller, the vehicle-mounted controller comprising:
[0021] A memory storing executable instructions;
[0022] A processor runs the executable instructions in the memory to implement the control method for alleviating power attenuation of a hybrid vehicle.
[0023] In a third aspect, an embodiment of the present disclosure further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the control method for alleviating power attenuation of a hybrid vehicle is implemented.
[0024] The methods and apparatus of the present invention have other features and advantages that will be apparent from, or will be described in detail in, the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.
[0026] Figure 1 A flow chart showing the steps of a control method for alleviating power attenuation of a hybrid vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION
[0027] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.
[0028] To facilitate understanding of the solutions and effects of the embodiments of the present invention, three specific application examples are given below. Those skilled in the art should understand that the examples are only for facilitating understanding of the present invention, and any specific details thereof are not intended to limit the present invention in any way.
[0029] Example 1
[0030] Figure 1 A flow chart showing the steps of a control method for alleviating power attenuation of a hybrid vehicle according to an embodiment of the present invention.
[0031] like Figure 1 As shown, the control method for alleviating power attenuation of a hybrid vehicle includes:
[0032] Step 101, identifying road conditions based on an altitude sensor, a temperature sensor, and a slope sensor;
[0033] Step 102, determining the vehicle's adjustment control parameters and their corresponding adjustment schemes according to the road conditions.
[0034] In one example, identifying the road condition based on the altitude sensor, the temperature sensor, and the slope sensor includes:
[0035] Identify the current altitude based on the altitude sensor;
[0036] Identify the slope size according to the slope sensor;
[0037] The temperature sensor includes an ambient temperature sensor and an intake manifold temperature sensor, wherein the ambient temperature sensor identifies the current ambient temperature, and the intake manifold temperature sensor identifies whether the temperature of air entering the engine meets the requirements.
[0038] In one example, the adjusted control parameters include vehicle battery balance SOC, vehicle mode, vehicle shift line, and engine operating point.
[0039] In one example, at least one of the battery balance SOC, the vehicle mode, and the engine operating point is adjusted according to the identification result of the altitude sensor.
[0040] In one example, the vehicle shift line is adjusted according to the recognition result of the slope sensor.
[0041] In one example, the battery balancing SOC and / or the engine operating point are adjusted based on the identification result of the ambient temperature sensor.
[0042] In one example, at least one of the battery balancing SOC, the vehicle mode, and the engine operating point is adjusted according to the identification result of the intake manifold temperature sensor.
[0043] In one example, if different road conditions adjust the same adjustment control parameter, the maximum adjustment value corresponding to the different road conditions is taken as the final adjustment value for the same adjustment control parameter.
[0044] Specifically, the present invention is a strategy to alleviate the power attenuation of hybrid vehicles in extreme usage environments. The controlled components include 4 sensors, 2 pedals, and 4 controllers. The road conditions and vehicle speed are monitored by four sensors to judge the road conditions, and the PDCU determines the battery balance SOC, shift line, mode switching working point, and engine operation area point. When the driver is in the corresponding working condition, the PDCU offsets the relevant control strategy to improve the maximum output power capacity of the vehicle, and then distributes the drive torque to the front and rear axles according to the wheel-end power demand, and sends it to the front and rear motors to complete the drive energy control.
[0045] Road condition recognition: Use the altitude sensor to identify whether the vehicle is in a high-altitude condition; use the temperature sensor to identify whether the vehicle is in a high-temperature or high-cold area; use the slope sensor to identify whether the vehicle is on a sloped road.
[0046] Determine the vehicle battery balance SOC: Based on the road conditions that can be identified by four sensors, the controller PDCU can offset the battery SOC balance point to alleviate the power attenuation caused by the decrease in discharge power of the engine and power battery due to extreme environments.
[0047] If the altitude sensor identifies that the vehicle is in a high altitude condition, the battery balance SOC will be offset. For example, the balance SOC in the plain area is 20%, and the balance SOC point in the plateau area is 30%. The balance SOC offset points in different altitude areas are inconsistent.
[0048] If the ambient temperature sensor identifies that the vehicle is in a cold area, the battery balance SOC will be offset. For example, the battery balance SOC at 25°C is 15%, and the battery balance SOC at -30°C is 35%. The discharge power will also increase after the power increases.
[0049] Vehicle mode switching determination: Based on the road conditions identifiable by four sensors, the controller PDCU can offset the vehicle control strategy, including but not limited to the series-parallel switching operating point, the engine series operating point, and the power battery power preservation SOC, to alleviate the power attenuation problem caused by extreme environments.
[0050] If the altitude sensor identifies that the vehicle is in a high altitude condition, the series-parallel switching operating point will be offset. For example, the speed of the vehicle from series to parallel in the plains is 68km / h, and the speed of the vehicle from series to parallel in plateau areas is 90km / h, and the same applies to parallel-to-series switching.
[0051] If the intake manifold temperature sensor identifies that the air temperature entering the engine does not meet the requirements, the series-parallel switching operating point will be offset. For example, the vehicle speed from series to parallel at an intake manifold temperature of 40°C is 68km / h, and the vehicle speed from series to parallel at an intake manifold temperature of 60°C is 90km / h, and the same applies to parallel-to-series switching.
[0052] Vehicle shift line determination: Based on the road conditions that can be identified by four sensors, the controller PDCU can offset the TMS control strategy to alleviate the power attenuation problem caused by the engine's external characteristic attenuation due to altitude and high temperature environment.
[0053] If the slope sensor identifies that the vehicle is on a sloped road, the shift line will be offset. For example, when shifting up on a flat road, the vehicle will shift into second gear at 65km / h, and on a slope, the vehicle will shift into second gear at 80km / h. The vehicle speed will be different for shifting up at different slopes, and the same applies to downshifting.
[0054] If the intake manifold temperature sensor detects that the air temperature entering the engine does not meet the requirements, the shift line will be offset. For example, when the intake manifold temperature is 40°C, the vehicle speed for shifting to 2nd gear is 65km / h. When the intake manifold temperature is 60°C, the vehicle speed for shifting to 2nd gear is 80km / h. The same applies to downshifting.
[0055] Vehicle engine operating point determination: Based on the road conditions that can be identified by four sensors, the controller PDCU can offset and adjust the engine operating point controlled by the EMS to alleviate the power attenuation problem caused by reasons such as battery failure to retain power.
[0056] If the altitude sensor detects that the vehicle is in high-altitude conditions, the peak torque at a constant speed will decrease because the air on the plateau is thin. In order to maintain the same power generation power as on the plains, the engine operating point is offset. For example, on the plains, the engine speed is 2000 rpm and the peak torque is 110 Nm. In high-altitude areas, the engine speed is 2800 rpm and the peak torque is 78 Nm (the peak torque depends on the maximum capacity of the hardware in the current environment).
[0057] If the ambient temperature sensor identifies that the vehicle is in a high-cold area, the engine operating point will be offset. For example, at 25°C, the engine speed is 2000r / min and the peak torque is 110Nm; at -30°C, the engine speed is 4000rpm / min and the peak torque is 110Nm. The engine power is increased to compensate for the decrease in battery discharge power.
[0058] If the intake manifold temperature sensor detects that the air temperature entering the engine does not meet the requirements, the engine operating point will be offset. For example, at an intake manifold temperature of 40°C, the engine speed is 2000r / min and the peak torque is 110Nm. At an intake manifold temperature of 60°C, the engine speed is 2800r / min and the peak torque is 78Nm (the peak torque depends on the maximum capability of the hardware under the current environment).
[0059] If the same adjustment control parameter is adjusted for different road conditions, the maximum value of the adjustment values corresponding to the different road conditions is taken as the final adjustment value for the same adjustment control parameter.
[0060] Example 2
[0061] The present disclosure provides a vehicle-mounted controller, which includes: a memory storing executable instructions; a processor running the executable instructions in the memory to implement the above-mentioned control method for alleviating power attenuation of a hybrid vehicle.
[0062] The vehicle-mounted controller according to an embodiment of the present disclosure includes a memory and a processor.
[0063] The memory is used to store non-temporary computer-readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may, for example, include read-only memory (ROM), hard disk, flash memory, etc.
[0064] The processor may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the onboard controller to perform desired functions. In one embodiment of the present disclosure, the processor is used to run the computer-readable instructions stored in the memory.
[0065] Those skilled in the art should be able to understand that in order to solve the technical problem of how to obtain a good user experience, the present embodiment may also include well-known structures such as a communication bus and an interface, and these well-known structures should also be included in the protection scope of the present disclosure.
[0066] For detailed description of this embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.
[0067] Example 3
[0068] An embodiment of the present disclosure provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the control method for alleviating power attenuation of a hybrid vehicle is implemented.
[0069] According to the computer-readable storage medium of the embodiment of the present disclosure, non-transitory computer-readable instructions are stored thereon. When the non-transitory computer-readable instructions are executed by a processor, all or part of the steps of the above-mentioned methods of each embodiment of the present disclosure are executed.
[0070] The above-mentioned computer-readable storage media include, but are not limited to: optical storage media (e.g., CD-ROM and DVD), magneto-optical storage media (e.g., MO), magnetic storage media (e.g., magnetic tape or mobile hard disk), media with built-in rewritable non-volatile memory (e.g., memory card) and media with built-in ROM (e.g., ROM box).
[0071] Those skilled in the art should understand that the purpose of the above description of the embodiments of the present invention is only to exemplarily illustrate the beneficial effects of the embodiments of the present invention, and is not intended to limit the embodiments of the present invention to any given examples.
[0072] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. A control method for alleviating power attenuation of a hybrid vehicle, characterized in that: include: Identify road conditions based on altitude sensors, temperature sensors, and slope sensors; According to the road conditions, the adjustment control parameters of the vehicle and the corresponding adjustment scheme are determined.
2. The control method for alleviating power attenuation of a hybrid vehicle according to claim 1, wherein: Identify road conditions based on altitude sensors, temperature sensors, and slope sensors, including: Identifying the current altitude according to the altitude sensor; Identify the slope size according to the slope sensor; The temperature sensor includes an ambient temperature sensor and an intake manifold temperature sensor, wherein the ambient temperature sensor is used to identify the current ambient temperature, and the intake manifold temperature sensor is used to identify whether the temperature of air entering the engine meets the requirements.
3. The control method for alleviating power attenuation of a hybrid vehicle according to claim 2, wherein: The adjustment control parameters include vehicle battery balance SOC, vehicle mode, vehicle shift line, and engine operating point.
4. The control method for alleviating power attenuation of a hybrid vehicle according to claim 3, wherein: At least one of the battery balance SOC, the vehicle mode, and the engine operating point is adjusted according to the recognition result of the altitude sensor.
5. The control method for alleviating power attenuation of a hybrid vehicle according to claim 3, wherein: The vehicle shift line is adjusted according to the recognition result of the slope sensor.
6. The control method for alleviating power attenuation of a hybrid vehicle according to claim 3, wherein: The battery balancing SOC and / or the engine operating point are adjusted according to the identification result of the ambient temperature sensor.
7. The control method for alleviating power attenuation of a hybrid vehicle according to claim 3, wherein: At least one of the battery balance SOC, the vehicle mode, and the engine operating point is adjusted according to the identification result of the intake manifold temperature sensor.
8. The control method for alleviating power attenuation of a hybrid vehicle according to claim 3, wherein: If the same adjustment control parameter is adjusted for different road conditions, the maximum value of the adjustment values corresponding to the different road conditions is taken as the final adjustment value for the same adjustment control parameter.
9. A vehicle-mounted controller, characterized in that: The vehicle-mounted controller comprises: A memory storing executable instructions; A processor, wherein the processor runs the executable instructions in the memory to implement the control method for alleviating power attenuation of a hybrid vehicle according to any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the control method for alleviating power attenuation of a hybrid vehicle according to any one of claims 1 to 8 is implemented.