CN115158019A - Over-temperature protection method, device, equipment and storage medium - Google Patents

Over-temperature protection method, device, equipment and storage medium Download PDF

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Publication number
CN115158019A
CN115158019A CN202210525850.8A CN202210525850A CN115158019A CN 115158019 A CN115158019 A CN 115158019A CN 202210525850 A CN202210525850 A CN 202210525850A CN 115158019 A CN115158019 A CN 115158019A
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torque
vehicle
temperature
preset
over
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CN115158019B (en
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梁崇宁
李通
洪小科
黄真
吴颂
李占凡
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Dongfeng Liuzhou Motor Co Ltd
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Dongfeng Liuzhou Motor Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0061—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/423—Torque
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/26—Driver interactions by pedal actuation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2260/00—Operating Modes
    • B60L2260/40—Control modes
    • B60L2260/50—Control modes by future state prediction
    • B60L2260/56—Temperature prediction, e.g. for pre-cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention belongs to the field of vehicles, and discloses an over-temperature protection method, device, equipment and storage medium. The method comprises the following steps: acquiring the current temperature of a vehicle driving system; when the current temperature is greater than a preset temperature threshold value, acquiring a torque-up slope and a torque ratio of the vehicle; and adjusting the output torque of the vehicle according to the torque rising slope and the torque ratio. According to the invention, when the current temperature is greater than the preset temperature threshold, the torque-up slope and the torque ratio of the vehicle are obtained; and adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio. Compared with the existing mode of alarming after the temperature of the vehicle driving system reaches the alarm threshold, the mode of the invention can adjust the output torque of the vehicle when the current temperature is higher than the preset temperature threshold, and prevent the temperature of the vehicle driving system from reaching the alarm threshold.

Description

Over-temperature protection method, device, equipment and storage medium
Technical Field
The invention relates to the technical field of vehicle driving system temperature control, in particular to an over-temperature protection method, device, equipment and storage medium.
Background
When a pure electric vehicle driving system frequently overtakes and decelerates in a high-speed driving process in a high-temperature environment, the temperature of the driving system (MCU) can be gradually increased, after the temperature reaches a certain alarm threshold value, the alarm state of the system can be triggered, an instrument displays an alarm, the driving experience of a user can be influenced, and the maintenance cost of the vehicle can be improved.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an over-temperature protection method, an over-temperature protection device, over-temperature protection equipment and a storage medium, and aims to solve the technical problems that in the prior art, after the temperature of a driving system gradually rises, the alarm state of the system is triggered, so that the user experience is influenced, and the maintenance cost of a user is increased.
In order to achieve the above object, the present invention provides an over-temperature protection method, comprising the steps of:
acquiring the current temperature of a vehicle driving system;
when the current temperature is greater than a preset temperature threshold value, acquiring a torque-up slope and a torque ratio of the vehicle;
adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio.
Optionally, the step of adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio comprises:
judging whether the vehicle meets a preset torque reduction condition or not according to the torque increasing slope and the torque ratio;
if so, acquiring the current rotating speed of the vehicle, and inquiring a preset torque reduction coefficient table according to the current rotating speed and the current temperature to obtain a torque reduction coefficient;
and adjusting the output torque of the vehicle according to the torque reduction coefficient and the target torque.
Optionally, the step of determining whether the vehicle meets a preset torque reduction condition according to the torque-up slope and the torque ratio includes:
judging whether the ramp-up rate is greater than a preset ramp-up rate threshold value or not;
and if the rising twist rate is greater than the preset rising twist rate threshold value and the torque ratio is greater than a preset torque ratio threshold value, judging that the vehicle meets a preset falling twist condition.
Optionally, the step of obtaining a torque-up slope and a torque ratio of the vehicle includes:
acquiring a torque rising slope and an accelerator pedal opening degree of the vehicle, and determining a target torque and a target rotating speed according to the accelerator pedal opening degree;
inquiring a preset external characteristic curve according to the target rotating speed to obtain a maximum torque value;
determining a torque ratio of the vehicle based on the target torque and the maximum torque value.
Optionally, the step of obtaining a lift-to-twist slope of the vehicle includes:
acquiring the current rotating speed of the vehicle;
determining a rotation speed difference value according to the current rotation speed and the target rotation speed;
and determining the torque rising slope of the vehicle according to the rotation speed difference value and the rotation speed response period.
Optionally, before the step of obtaining the current temperature of the vehicle driving system, the method further includes:
acquiring temperature information of a test vehicle in a test working condition;
determining the test time when the temperature of the test vehicle driving system reaches a preset temperature alarm threshold value according to the temperature information;
determining target time according to the test time;
and determining a preset temperature threshold according to the target time and the temperature information.
Optionally, after the step of determining the output torque of the vehicle according to the torque-up slope and the torque ratio, the method further includes:
and acquiring the current temperature after torque adjustment, and returning to the step of acquiring the torque-up slope and the torque ratio of the vehicle when the current temperature is greater than the preset temperature threshold.
In addition, to achieve the above object, the present invention also provides an over-temperature protection device, including:
the acquisition module is used for acquiring the current temperature of the vehicle driving system;
the comparison module is used for acquiring the torque rising slope and the torque ratio of the vehicle when the current temperature is higher than a preset temperature threshold;
and the adjusting module is used for adjusting the output torque of the vehicle according to the torque rising slope and the torque ratio.
In addition, in order to achieve the above object, the present invention also provides an over-temperature protection apparatus, including: a memory, a processor, and an over-temperature protection program stored on the memory and executable on the processor, the over-temperature protection program configured to implement the steps of the over-temperature protection method as described above.
In addition, to achieve the above object, the present invention further provides a storage medium having an over-temperature protection program stored thereon, wherein the over-temperature protection program, when executed by a processor, implements the steps of the over-temperature protection method as described above.
The method comprises the steps of obtaining the current temperature of a vehicle driving system; when the current temperature is greater than a preset temperature threshold value, acquiring a torque-up slope and a torque ratio of the vehicle; and adjusting the output torque of the vehicle according to the torque rising slope and the torque ratio. According to the invention, when the current temperature is greater than the preset temperature threshold, the torque-up slope and the torque ratio of the vehicle are obtained; and adjusting the output torque of the vehicle according to the torque rising slope and the torque ratio. Compared with the existing mode of alarming after the temperature of the vehicle driving system reaches the alarm threshold, the mode of the invention can adjust the output torque of the vehicle when the current temperature is higher than the preset temperature threshold, and prevent the temperature of the vehicle driving system from reaching the alarm threshold.
Drawings
FIG. 1 is a schematic structural diagram of an over-temperature protection device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of the over-temperature protection method of the present invention;
FIG. 3 is a schematic flow chart of a second embodiment of the over-temperature protection method of the present invention;
FIG. 4 is a schematic flow chart of a third embodiment of the over-temperature protection method of the present invention;
fig. 5 is a block diagram of the first embodiment of the over-temperature protection device according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an over-temperature protection device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the over-temperature protection apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (WI-FI) interface). The Memory 1005 may be a high-speed Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the overtemperature protection device and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and an over-temperature protection program.
In the over-temperature protection apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 of the over-temperature protection device of the present invention may be disposed in the over-temperature protection device, and the over-temperature protection device calls the over-temperature protection program stored in the memory 1005 through the processor 1001 and executes the over-temperature protection method provided by the embodiment of the present invention.
Based on the above over-temperature protection device, an embodiment of the present invention provides an over-temperature protection method, and referring to fig. 2, fig. 2 is a schematic flowchart of a first embodiment of the over-temperature protection method of the present invention.
In this embodiment, the over-temperature protection method includes the following steps:
step S10: the current temperature of the vehicle drive system is obtained.
It should be noted that the execution main body of the embodiment may be a computing service device with data processing, network communication and program running functions, such as a mobile phone, a tablet computer, a personal computer, etc., or an electronic device or an over-temperature protection device capable of implementing the above functions. The present embodiment and the following embodiments will be described below by taking the above-described overheat protection device as an example.
It should be noted that the current temperature may be a collected temperature of a driving system of the vehicle, and specifically may be a temperature of a motor in the driving system.
Further, in order to accurately determine the preset temperature threshold, when the temperature of the vehicle driving system does not reach the alarm temperature, the temperature control method further includes, before step S10: acquiring temperature information of a test vehicle in a test working condition; determining the test time for the temperature of the test vehicle driving system to reach a preset temperature alarm threshold value according to the temperature information; determining target time according to the test time; and determining a preset temperature threshold according to the target time and the temperature information.
It should be noted that the temperature information may be temperature change information of the test vehicle during the test and a time of temperature acquisition. The preset temperature alarm threshold may be an alarm temperature of a driving system of the test vehicle, that is, when the temperature reaches the preset temperature alarm threshold, the driving system may trigger a temperature alarm, and the test time may be a test time when the test vehicle reaches the preset temperature alarm threshold, for example, when the test vehicle reaches the preset temperature alarm threshold 10 minutes after the test starts, the test time is 10 minutes. The determining of the target time according to the test time may be to multiply the test time by a preset percentage to obtain a target time, for example, to multiply the test time by 70% to obtain a target time, and use a temperature corresponding to the target time as the preset temperature threshold.
Step S20: and when the current temperature is greater than a preset temperature threshold value, acquiring a torque-up slope and a torque ratio of the vehicle.
It should be noted that the preset temperature threshold may be a preset temperature at which the output torque of the vehicle needs to be adjusted when the current temperature is greater than the preset temperature threshold, and the preset temperature threshold is less than a temperature at which a high temperature alarm is triggered in the driving system. The ramp-up rate may be a value obtained by dividing the rotational speed response period by the rotational speed that needs to be raised when the user suddenly accelerates. The torque ratio may be a ratio of a target torque to a maximum torque value corresponding to a target rotation speed of the user. The target torque and the target rotating speed are torque and rotating speed corresponding to the step-on of an accelerator pedal by a user.
Step S30: adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio.
It should be noted that, the adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio may be querying a preset torque-down comparison table according to the torque-up slope and the torque ratio to obtain a torque-down coefficient, multiplying a target torque by the torque-down coefficient to obtain the output torque of the vehicle, and controlling the vehicle to run according to the output torque. The preset torque reduction comparison table can be a comparison table of preset torque increase slope, torque ratio and torque reduction coefficient.
Further, after controlling the output torque of the vehicle, the temperature of the driving system may also be continuously increased, and at this time, in order to avoid the temperature of the vehicle reaching the alarm temperature, after the step S30, the method further includes the steps of obtaining the current temperature after the torque adjustment, and returning to the step of obtaining the torque-up slope and the torque ratio of the vehicle when the current temperature is greater than the preset temperature threshold.
The embodiment acquires the current temperature of the vehicle driving system; when the current temperature is greater than a preset temperature threshold value, acquiring a torque-up slope and a torque ratio of the vehicle; adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio. In the embodiment, when the current temperature is greater than the preset temperature threshold, the torque-up slope and the torque ratio of the vehicle are obtained; and adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio. Compared with the existing mode of alarming after the temperature of the vehicle driving system reaches the alarm threshold, the mode of the embodiment can adjust the output torque of the vehicle when the current temperature is higher than the preset temperature threshold, and the temperature of the vehicle driving system is prevented from reaching the alarm threshold.
Referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the over-temperature protection method of the present invention.
Based on the first embodiment described above, in the present embodiment, the step S20 includes:
step S201: and acquiring the torque-up slope and the opening degree of an accelerator pedal of the vehicle, and determining a target torque and a target rotating speed according to the opening degree of the accelerator pedal.
The accelerator pedal opening may be information on an opening of an accelerator pedal that a user depresses. The target torque may be a torque to be executed by the vehicle corresponding to the accelerator pedal opening. The target rotation speed may be a rotation speed to be executed by the vehicle corresponding to the accelerator pedal opening degree.
Further, in order to reduce the output torque of the motor and achieve the purpose of reducing the possibility of over-temperature of the motor while ensuring drivability, the step of obtaining the torque-up slope of the vehicle includes: acquiring the current rotating speed of the vehicle; determining a rotation speed difference value according to the current rotation speed and the target rotation speed; and determining the torque rising slope of the vehicle according to the rotation speed difference value and the rotation speed response period.
It should be noted that the current rotation speed may be an actual rotation speed of the vehicle in the current running process. The difference in rotational speeds may be the target rotational speed minus the current rotational speed. The rotation speed response period may be a response period from the reception of the pedal opening signal of the user to the control of the vehicle running at the rotation speed corresponding to the pedal opening signal, that is, a response period of the vehicle in response to the acceleration information of the user. The determining the twist-up slope of the vehicle according to the rotation speed difference value and the rotation speed response period may be determining the twist-up slope of the vehicle by dividing the rotation speed response period by the rotation speed difference value.
Step S202: and inquiring a preset external characteristic curve according to the target rotating speed to obtain a maximum torque value.
It should be noted that the preset external characteristic curve may be an external characteristic curve corresponding to a motor of the vehicle. And inquiring a preset external characteristic curve through the target rotating speed to obtain a maximum torque value corresponding to the target rotating speed in the preset external characteristic curve.
Step S203: determining a torque ratio of the vehicle based on the target torque and the maximum torque value.
It should be noted that, the determining the torque ratio of the vehicle according to the target torque and the maximum torque value may be dividing the maximum torque value by the target torque to obtain the torque ratio of the vehicle.
The method comprises the steps of acquiring a torque rising slope and an opening degree of an accelerator pedal of the vehicle, and determining a target torque and a target rotating speed according to the opening degree of the accelerator pedal; inquiring a preset external characteristic curve according to the target rotating speed to obtain a maximum torque value; determining a torque ratio of the vehicle based on the target torque and the maximum torque value. The method and the device for controlling the vehicle torque increase are characterized in that the torque increase slope and the torque ratio of the vehicle are obtained, the output torque of the vehicle is adjusted according to the torque increase slope and the torque ratio, the output torque of the motor is reduced, the driving performance is guaranteed, the possibility of reducing the motor over-temperature is achieved, the possibility of triggering an alarm is reduced, and the user experience is improved.
Referring to fig. 4, fig. 4 is a schematic flow chart of a third embodiment of the over-temperature protection method of the present invention.
Based on the foregoing embodiments, in this embodiment, the step S30 includes:
step S301: and judging whether the vehicle meets a preset torque reduction condition or not according to the torque increasing slope and the torque ratio.
It should be noted that the preset torque-down condition may be that the rising skew rate is greater than a preset rising skew rate threshold and the torque ratio is also greater than a preset torque ratio threshold, where the preset rising skew rate threshold and the preset torque ratio threshold may be obtained according to test calibration, and the preset rising skew rate threshold may be 0.9.
Step S302: and if so, acquiring the current rotating speed of the vehicle, and inquiring a preset torque reduction coefficient table according to the current rotating speed and the current temperature to obtain a torque reduction coefficient.
It should be noted that the preset torque reduction coefficient table may be a comparison table of the current rotation speed, the current temperature and the torque reduction coefficient, which is determined in advance according to experiments. The following table 1-table of preset torque reduction coefficients can be referred to specifically:
TABLE 1 Preset Torque reduction coefficient Table
Figure BDA0003647687270000081
In specific implementation, the MCU alarm temperature is 120 ℃, if the MCU alarm temperature exceeds the value, the MCU sends an alarm signal to the instrument, the VCM sets a preset temperature threshold of the MCU to be 110 ℃, when the motor runs at a 7000 rpm-1000 rpm speed range, the temperature detected by the MCU reaches 110 ℃ in a certain time period, the VCM receives the signal and judges that the preset temperature threshold is reached, after a user steps on an accelerator pedal, a target speed is obtained, the target speed is compared with an external characteristic curve corresponding to the current motor to obtain a maximum torque, a torque ratio is calculated according to the target torque and the maximum torque, when the torque ratio is larger than 0.9 (at this moment, the large accelerator is considered to be accelerated), and the lift skew is larger than a preset lift skew threshold (at this moment, the large accelerator is considered to be accelerated), the actual output torque is reduced to 97% of the target torque, then the MCU system runs with the output torque instruction, the highest temperature of the system reaches a thermal equilibrium state of 118 ℃, and an alarm is not triggered.
Step S303: and adjusting the output torque of the vehicle according to the torque reduction coefficient and the target torque.
The adjusting of the output torque of the vehicle according to the torque reduction coefficient and the target torque may be to multiply the torque reduction coefficient by the target torque to obtain the output torque, and control the vehicle to run according to the output torque.
The embodiment judges whether the vehicle meets a preset torque reduction condition or not according to the torque increasing slope and the torque ratio; if so, acquiring the current rotating speed of the vehicle, and inquiring a preset torque reduction coefficient table according to the current rotating speed and the current temperature to obtain a torque reduction coefficient; and adjusting the output torque of the vehicle according to the torque reduction coefficient and the target torque. According to the implementation, when the torque increasing slope and the torque ratio meet a preset torque decreasing condition, a preset torque decreasing coefficient table is inquired according to the current rotating speed and the current temperature to obtain a torque decreasing coefficient, and then the output torque of the vehicle is adjusted according to the torque decreasing coefficient and the target torque. The torque reduction processing is carried out on the premise of ensuring the dynamic property, so that the possibility of reducing the over-temperature of the motor is reduced, the possibility of triggering the alarm is reduced, and the user experience is improved.
Referring to fig. 5, fig. 5 is a block diagram illustrating a first embodiment of the over-temperature protection device according to the present invention.
As shown in fig. 5, the over-temperature protection device according to the embodiment of the present invention includes:
an obtaining module 10, configured to obtain a current temperature of a vehicle driving system;
the comparison module 20 is configured to obtain a torque-up slope and a torque ratio of the vehicle when the current temperature is greater than a preset temperature threshold;
and the adjusting module 30 is used for adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio.
The embodiment acquires the current temperature of the vehicle driving system; when the current temperature is higher than a preset temperature threshold value, acquiring a torque rising slope and a torque ratio of the vehicle; and adjusting the output torque of the vehicle according to the torque rising slope and the torque ratio. In the embodiment, when the current temperature is higher than the preset temperature threshold, the torque-up slope and the torque ratio of the vehicle are obtained; and adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio. Compared with the existing mode that the temperature of the vehicle driving system gives an alarm after reaching the alarm threshold value, the mode can adjust the output torque of the vehicle when the current temperature is higher than the preset temperature threshold value, and the temperature of the vehicle driving system is prevented from reaching the alarm threshold value.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may refer to the over-temperature protection method provided in any embodiment of the present invention, and are not described herein again.
Based on the first embodiment of the over-temperature protection device, a second embodiment of the over-temperature protection device is provided.
In this embodiment, the adjusting module 30 is further configured to determine whether the vehicle meets a preset torque reduction condition according to the torque-up slope and the torque ratio; if so, acquiring the current rotating speed of the vehicle, and inquiring a preset torque reduction coefficient table according to the current rotating speed and the current temperature to obtain a torque reduction coefficient; and adjusting the output torque of the vehicle according to the torque reduction coefficient and the target torque.
Further, the adjusting module 30 is further configured to determine whether the ramp-up rate is greater than a preset ramp-up rate threshold; and if the rising twist rate is larger than the preset rising twist rate threshold value and the torque ratio is larger than the preset torque ratio threshold value, judging that the vehicle meets the preset falling twist condition.
Further, the comparing module 20 is further configured to obtain a torque-up slope and an accelerator pedal opening of the vehicle, and determine a target torque and a target rotation speed according to the accelerator pedal opening; inquiring a preset external characteristic curve according to the target rotating speed to obtain a maximum torque value; determining a torque ratio of the vehicle based on the target torque and the maximum torque value.
Further, the comparing module 20 is further configured to obtain a current rotation speed of the vehicle; determining a rotation speed difference value according to the current rotation speed and the target rotation speed; and determining the torque rising slope of the vehicle according to the rotation speed difference value and the rotation speed response period.
Further, the obtaining module 10 is further configured to obtain temperature information of the test vehicle in the test working condition; determining the test time for the temperature of the test vehicle driving system to reach a preset temperature alarm threshold value according to the temperature information; determining target time according to the test time; and determining a preset temperature threshold according to the target time and the temperature information.
Further, the adjusting module 30 is further configured to obtain a current temperature after the torque adjustment, and return to the step of obtaining the torque-up slope and the torque ratio of the vehicle when the current temperature is greater than the preset temperature threshold.
Other embodiments or specific implementation manners of the over-temperature protection device of the present invention may refer to the above method embodiments, and are not described herein again.
In addition, an embodiment of the present invention further provides a storage medium, where an over-temperature protection program is stored on the storage medium, and the over-temperature protection program, when executed by a processor, implements the steps of the over-temperature protection method described above.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (such as a rom/ram, a magnetic disk, and an optical disk), and includes several instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. An over-temperature protection method is characterized by comprising the following steps:
acquiring the current temperature of a vehicle driving system;
when the current temperature is greater than a preset temperature threshold value, acquiring a torque-up slope and a torque ratio of the vehicle;
adjusting the output torque of the vehicle according to the torque-up slope and the torque ratio.
2. The over-temperature protection method according to claim 1, wherein the step of adjusting the output torque of the vehicle according to the ramp rate and the torque ratio comprises:
judging whether the vehicle meets a preset torque reduction condition or not according to the torque increasing slope and the torque ratio;
if so, acquiring the current rotating speed of the vehicle, and inquiring a preset torque reduction coefficient table according to the current rotating speed and the current temperature to obtain a torque reduction coefficient;
and adjusting the output torque of the vehicle according to the torque reduction coefficient and the target torque.
3. The over-temperature protection method according to claim 2, wherein the step of determining whether the vehicle satisfies a preset torque down condition according to the torque up slope and the torque ratio comprises:
judging whether the ramp-up rate is greater than a preset ramp-up rate threshold value or not;
and if the rising twist rate is greater than the preset rising twist rate threshold value and the torque ratio is greater than a preset torque ratio threshold value, judging that the vehicle meets a preset falling twist condition.
4. The over-temperature protection method according to claim 1, wherein the step of obtaining a torque-up slope and a torque ratio of the vehicle comprises:
acquiring a torque rising slope and an opening degree of an accelerator pedal of the vehicle, and determining a target torque and a target rotating speed according to the opening degree of the accelerator pedal;
inquiring a preset external characteristic curve according to the target rotating speed to obtain a maximum torque value;
determining a torque ratio of the vehicle based on the target torque and the maximum torque value.
5. The over-temperature protection method according to claim 4, wherein the step of obtaining a torque-up slope of the vehicle comprises:
acquiring the current rotating speed of the vehicle;
determining a rotation speed difference value according to the current rotation speed and the target rotation speed;
and determining the torque rising slope of the vehicle according to the rotation speed difference value and the rotation speed response period.
6. The over-temperature protection method according to any one of claims 1 to 5, wherein the step of obtaining the current temperature of the vehicle drive system is preceded by the step of:
acquiring temperature information of a test vehicle in a test working condition;
determining the test time for the temperature of the test vehicle driving system to reach a preset temperature alarm threshold value according to the temperature information;
determining target time according to the test time;
and determining a preset temperature threshold according to the target time and the temperature information.
7. The over-temperature protection method according to any one of claims 1-5, wherein the step of determining the output torque of the vehicle based on the torque-up slope and the torque ratio value is followed by further comprising:
and acquiring the current temperature after torque adjustment, and returning to the step of acquiring the torque-up slope and the torque ratio of the vehicle when the current temperature is greater than the preset temperature threshold.
8. An over-temperature protection device, comprising:
the acquisition module is used for acquiring the current temperature of the vehicle driving system;
the comparison module is used for acquiring the torque rising slope and the torque ratio of the vehicle when the current temperature is higher than a preset temperature threshold;
and the adjusting module is used for adjusting the output torque of the vehicle according to the torque rising slope and the torque ratio.
9. An over-temperature protection device, characterized in that the device comprises: a memory, a processor, and an over-temperature protection program stored on the memory and executable on the processor, the over-temperature protection program configured to implement the steps of the over-temperature protection method as claimed in any one of claims 1 to 7.
10. A storage medium, characterized in that the storage medium has stored thereon an over-temperature protection program, which when executed by a processor implements the steps of the over-temperature protection method according to any one of claims 1 to 7.
CN202210525850.8A 2022-05-17 2022-05-17 Over-temperature protection method, device, equipment and storage medium Active CN115158019B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103963778A (en) * 2013-02-04 2014-08-06 广州汽车集团股份有限公司 Hybrid vehicle shifting assistance control method and corresponding hybrid vehicle
KR101428931B1 (en) * 2013-07-02 2014-08-08 현대다이모스(주) Method and device for controlling a torque in 4 wheel driving vehicle
US20150217770A1 (en) * 2012-08-16 2015-08-06 Jaquar Land Rover Limited Vehicle speed control system
CN107606129A (en) * 2017-08-17 2018-01-19 济宁中科先进技术研究院有限公司 Electric car two keeps off gearbox self shifter control method and its control system
CN113183773A (en) * 2021-06-07 2021-07-30 北京车和家信息技术有限公司 Electric vehicle control method, electric vehicle control device, storage medium, and electronic apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150217770A1 (en) * 2012-08-16 2015-08-06 Jaquar Land Rover Limited Vehicle speed control system
CN103963778A (en) * 2013-02-04 2014-08-06 广州汽车集团股份有限公司 Hybrid vehicle shifting assistance control method and corresponding hybrid vehicle
KR101428931B1 (en) * 2013-07-02 2014-08-08 현대다이모스(주) Method and device for controlling a torque in 4 wheel driving vehicle
CN107606129A (en) * 2017-08-17 2018-01-19 济宁中科先进技术研究院有限公司 Electric car two keeps off gearbox self shifter control method and its control system
CN113183773A (en) * 2021-06-07 2021-07-30 北京车和家信息技术有限公司 Electric vehicle control method, electric vehicle control device, storage medium, and electronic apparatus

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