CN112848919A - Power-off method and device of electric automobile and electric automobile - Google Patents
Power-off method and device of electric automobile and electric automobile Download PDFInfo
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- CN112848919A CN112848919A CN202110099180.3A CN202110099180A CN112848919A CN 112848919 A CN112848919 A CN 112848919A CN 202110099180 A CN202110099180 A CN 202110099180A CN 112848919 A CN112848919 A CN 112848919A
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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
- 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
- B60L15/2009—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 for braking
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- 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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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The application discloses power-off method and device for electric automobile and electric automobile, wherein the method comprises the following steps: detecting whether the electric automobile is powered off or not; when the power-off of the electric automobile is detected and the current gear is a neutral gear, acquiring the actual rotating speed of a driving motor of the electric automobile; and if the acquired actual rotating speed is greater than zero, controlling the electric automobile to execute a power-off action and simultaneously controlling the driving motor to stop rotating. Therefore, the problems of noise, potential safety hazards and the like caused by the fact that the driving motor still operates after the electric automobile is powered off at present are solved.
Description
Technical Field
The application relates to the technical field of new energy automobiles, in particular to a power-off method and a power-on device of an electric automobile and the electric automobile.
Background
In the related technology, after the manual-gear electric automobile is powered off and flamed out, the whole automobile controller immediately cuts off the power supply of the whole automobile, and the motor controller immediately cuts off the power input of the driving motor.
However, due to the existence of the clutch and the manual transmission neutral gear, the gear is in the neutral state after power is off, the output shaft of the motor is separated from the transmission of the vehicle, and the motor is basically in the no-load state, so the motor can still continue to rotate under the action of inertia until the motor naturally stops, the stop time is long, and noise can be generated; meanwhile, after the vehicle is powered off, the driving motor still operates, once a driver puts a gear into other gears from a neutral gear due to misoperation, the vehicle may shift, potential safety hazards exist, and the problem needs to be solved urgently.
Content of application
The application provides a power-off method and device of an electric automobile and the electric automobile, and aims to solve the problems of noise, potential safety hazards and the like caused by the fact that a driving motor still runs after the electric automobile is powered off at present.
An embodiment of a first aspect of the present application provides a power-off method for an electric vehicle, including the following steps: detecting whether the electric automobile is powered off or not; when the fact that the electric automobile is powered off and the current gear is in a neutral gear is detected, collecting the actual rotating speed of a driving motor of the electric automobile; and if the acquired actual rotating speed is greater than zero, controlling the electric automobile to execute a power-off action and simultaneously controlling the driving motor to stop rotating.
Further, the controlling the driving motor to stop rotating includes: generating a control signal according to the actual rotating speed and a target rotating speed, wherein the target rotating speed is zero; and reducing the rotating speed of the driving motor to zero through a rotating speed ring according to the control signal.
Further, still include: and if the acquired actual rotating speed is equal to zero, controlling the electric automobile to execute electric operation.
Further, the detecting whether the electric automobile is powered off comprises: receiving a key signal, wherein the key signal comprises a power-down signal; judging whether the key signal is the power-off signal or not; and if the key signal is the power-off signal, detecting that the electric automobile is powered off.
An embodiment of a second aspect of the present application provides a power-off device of an electric vehicle, including: the detection module is used for detecting whether the electric automobile is powered off or not; the acquisition module is used for acquiring the actual rotating speed of a driving motor of the electric automobile when the electric automobile is detected to be powered off and the current gear is neutral; and the first control module is used for controlling the driving motor to stop rotating while controlling the electric automobile to execute the power-off action when the acquired actual rotating speed is greater than zero.
Further, the first control module includes: the generating unit is used for generating a control signal according to the actual rotating speed and a target rotating speed, wherein the target rotating speed is zero; and the control unit is used for reducing the rotating speed of the driving motor to zero through a rotating speed ring according to the control signal.
Further, still include: and the second control module is used for controlling the electric automobile to execute the electric operation when the acquired actual rotating speed is equal to zero.
Further, the detection module includes: a receiving unit for receiving a key signal, wherein the key signal comprises a down signal; a judging unit for judging whether the key signal is the power-off signal; and the detection unit is used for detecting that the electric automobile is powered off when the key signal is the power-off signal.
In a third aspect of the present application, an electric vehicle is provided, which includes the power-off device of the electric vehicle in the above embodiments.
When the electric automobile is powered off, the actual rotating speed of the driving motor is reduced to zero, then the electric automobile is controlled to execute the power-off action, so that the driving motor stops running when the power-off action is guaranteed, the noise generated by the driving motor in the power-off process due to inertia can be avoided, meanwhile, the phenomenon of movement caused by gear misoperation after the power-off process can be avoided, and the safety of the electric automobile is greatly improved. Therefore, the problems of noise, potential safety hazards and the like caused by the fact that the driving motor still operates after the electric automobile is powered off at present are solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a power-off method of an electric vehicle according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a main system of an electric vehicle according to an embodiment of the present application;
fig. 3 is a schematic flow chart of a power-off method of an electric vehicle according to an embodiment of the present application
Fig. 4 is an exemplary diagram of a power-off device of an electric vehicle according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following describes a power-off method and device for an electric vehicle and the electric vehicle according to the embodiments of the present application with reference to the drawings. In the method, when the electric automobile is powered off, after the actual rotating speed of the driving motor is reduced to zero, the electric automobile is controlled to execute the power-off action, so that the driving motor stops running when the power-off action is ensured, the noise generated by the driving motor still running due to inertia after the electric automobile is powered off can be avoided, meanwhile, the phenomenon of movement due to gear misoperation after the power-off action is avoided, and the safety of the electric automobile is greatly improved. Therefore, the problems of noise, potential safety hazards and the like caused by the fact that the driving motor still operates after the electric automobile is powered off at present are solved.
Specifically, fig. 1 is a schematic flowchart of a power-off method of an electric vehicle according to an embodiment of the present application.
As shown in fig. 1, the power-off method of the electric vehicle includes the following steps:
in step S101, it is detected whether the electric vehicle is powered down.
The main body for executing the power-off method of the electric vehicle may be the electric vehicle. The power-off method of the electric vehicle according to the embodiment of the present application may be executed by the power-off device of the electric vehicle according to the embodiment of the present application, and the power-off device of the electric vehicle according to the embodiment of the present application may be configured in any electric vehicle to execute the power-off method of the electric vehicle according to the embodiment of the present application. In the embodiment of the present application, the electric vehicle is exemplified by a manual transmission electric vehicle.
Because manual fender electric automobile is down the electricity after flame-out, driving motor still operates under the inertial action, leads to noise and potential safety hazard problem, this application embodiment can control the motor speed after electric automobile is down to electric doing under the execution after zero. Therefore, the embodiment of the application needs to detect whether the electric vehicle is powered down first, so as to execute the subsequent power-down control action.
In this implementation, whether detect electric automobile and descend the electricity includes: receiving a key signal, wherein the key signal comprises a power-down signal; judging whether the key signal is a lower electric signal or not; and if the key signal is a power-off signal, detecting that the electric automobile is powered off.
It can be understood that, the embodiment of the application can receive the key signal in real time and judge whether the electric vehicle is powered off according to whether the key signal is the power off signal.
In step S102, when it is detected that the electric vehicle is powered off and the current gear is neutral, the actual rotation speed of the driving motor of the electric vehicle is collected.
It can be understood that after detecting that the electric automobile is powered off, the embodiment of the application detects a gear signal of the electric automobile, so as to determine a current gear according to the gear signal, and if the current gear is neutral, acquires an actual rotating speed of the driving motor.
In step S103, if the collected actual rotation speed is greater than zero, the electric vehicle is controlled to execute the powering-off operation, and the driving motor is controlled to stop rotating.
The embodiment of the application can control the motor speed of the driving motor to be quickly reduced to zero after the electric automobile is powered off, and then the electric automobile is electrically operated under execution, so that the problem that the motor still runs to generate noise after the electric automobile is powered off can be solved, and meanwhile, the safety of the automobile is improved.
In this embodiment, controlling the driving motor to stop rotating includes: generating a control signal according to the actual rotating speed and the target rotating speed, wherein the target rotating speed is zero; and reducing the rotating speed of the driving motor to zero through the rotating speed ring according to the control signal.
It can be understood that after the electric automobile is powered off, the motor controller controls the rotating speed of the driving motor through the rotating speed ring, so that after the rotating speed of the motor is rapidly reduced to 0, the whole automobile is powered off, the condition that the motor is still in a rotating state due to inertia after the electric automobile is powered off can be avoided, and the problem of noise caused by the fact that the motor is still rotated after the electric automobile is powered off is solved. In addition, the problem that the vehicle is likely to move due to the fact that the driver shifts gears from the neutral gear into other gears due to misoperation when the driving motor still runs after the vehicle is powered off is avoided, and safety of the vehicle is improved.
The rotating speed ring drives the tachogenerator through the driving motor, so that the tachogenerator generates power and outputs voltage, the output voltage is fed back to the input end and is compared with the input given voltage, and the rotating speed of the driving motor is controlled.
In some embodiments, if the collected actual rotation speed is equal to zero, the electric vehicle is controlled to perform the electric operation. That is, if the acquired rotation speed of the driving motor is zero, the power-down operation can be directly performed.
In the following, a power-off method of an electric vehicle is described by taking a manual-gear electric vehicle as an example, and as shown in fig. 2, a main system of the manual-gear electric vehicle includes: vehicle control unit, motor controller, driving motor, neutral gear signal sensor, key, CAN bus. The vehicle controller is responsible for receiving a neutral gear signal and a key signal and feeding back information to the motor controller through a CAN bus; the motor controller is responsible for controlling the driving motor, receiving related signals provided by the whole vehicle controller, and acquiring rotating speed signals of the driving motor and the like; the driving motor is responsible for responding to a control instruction of the motor controller and feeding back rotating speed information to the motor controller; the neutral gear signal sensor is responsible for feeding a gear signal back to the vehicle control unit; the key is responsible for feeding back the up and down electric signals of the key to the vehicle control unit; the CAN bus is responsible for the interaction of relevant data and signals of the whole vehicle controller and the motor controller. Specifically, as shown in fig. 3, the power-off method of the electric vehicle includes the following steps:
step S1: starting;
step S2: judging a key signal: the vehicle control unit continuously receives the key signal, judges whether the power is off, and if so, enters step S3;
step S3, gear signal judgment: the vehicle control unit continuously receives the gear signal, judges whether the current gear is in a neutral gear, and if so, enters step S4;
step S4, judging the motor speed: the motor controller continuously receives the motor rotating speed signal, judges whether the motor rotating speed n is 0 or not, and if not, the step S5 is executed;
step S5, the motor controller controls the rotating speed of the driving motor through a rotating speed ring, so that the rotating speed of the driving motor is rapidly reduced to 0;
step S6, the vehicle controller controls the vehicle to finish power-off;
and step S7, end.
According to the power-off method of the electric automobile, when the electric automobile is powered off, after the actual rotating speed of the driving motor is reduced to zero, the electric automobile is controlled to execute power-off action, and the driving motor is stopped when the power-off action is ensured, so that noise generated by the fact that the driving motor still runs due to inertia after the electric automobile is powered off can be avoided, meanwhile, the phenomenon of shifting caused by gear misoperation after the power-off action is carried out can also be avoided, and the safety of the electric automobile is greatly improved.
Next, a power-off device of an electric vehicle according to an embodiment of the present application will be described with reference to the drawings.
Fig. 4 is a block diagram schematically illustrating a power-off device of an electric vehicle according to an embodiment of the present application.
As shown in fig. 4, the power-off device 10 of the electric vehicle includes: a detection module 100, an acquisition module 200 and a first control module 300.
The detection module 100 is used for detecting whether the electric vehicle is powered off; the acquisition module 200 is configured to acquire an actual rotation speed of a driving motor of the electric vehicle when it is detected that the electric vehicle is powered off and a current gear is a neutral gear; the first control module 300 is configured to control the driving motor to stop rotating while controlling the electric vehicle to execute the powering-off action when the acquired actual rotating speed is greater than zero.
Further, the first control module 300 includes: a generating unit and a control unit. The device comprises a generating unit, a control unit and a control unit, wherein the generating unit is used for generating a control signal according to an actual rotating speed and a target rotating speed, and the target rotating speed is zero; and the control unit is used for reducing the rotating speed of the driving motor to zero through the rotating speed ring according to the control signal.
Further, the apparatus 10 of the embodiment of the present application further includes: and a second control module. The second control module is used for controlling the electric automobile to execute electric operation when the collected actual rotating speed is equal to zero.
Further, the detection module 100 includes: the device comprises a receiving unit, a judging unit and a detecting unit. The receiving unit is used for receiving a key signal, wherein the key signal comprises a lower electric signal; the judging unit is used for judging whether the key signal is a power-off signal or not; and the detection unit is used for detecting that the electric automobile is powered off when the key signal is a power-off signal.
It should be noted that the foregoing explanation of the embodiment of the power-down method of the electric vehicle is also applicable to the power-down device of the electric vehicle of the embodiment, and is not repeated herein.
According to the electric automobile's that this application embodiment provided lower electric installation, when electric automobile cuts off the electricity, after reducing driving motor's actual rotational speed to zero, the electric automobile execution is controlled again and is cut off the electricity action, driving motor stopped operation when guaranteeing to cut off the electricity action, thereby can avoid electric automobile to make driving motor still operate the noise that produces because of inertia after cutting off the electricity, also can avoid simultaneously to cut off the electricity back because of keeping off the drunkenness phenomenon that the gear position maloperation appears, electric automobile's security has been promoted greatly.
The embodiment also provides an electric automobile, which comprises the power-off device of the electric automobile of the embodiment. According to the electric automobile of this application embodiment, when electric automobile deenergizes, after reducing driving motor's actual rotational speed to zero, the electric automobile of controlling again carries out the action of next round of electricity, driving motor stopped operation when guaranteeing the action of next round of electricity, thereby can avoid electric automobile to make driving motor still operate the noise that produces because of inertia after next round of electricity, also can avoid simultaneously the drunkenness phenomenon that appears because of keeping off the position maloperation after next round of electricity, electric automobile's security has been promoted greatly.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (9)
1. A power-off method of an electric automobile is characterized by comprising the following steps:
detecting whether the electric automobile is powered off or not;
when the fact that the electric automobile is powered off and the current gear is in a neutral gear is detected, collecting the actual rotating speed of a driving motor of the electric automobile; and
and if the acquired actual rotating speed is greater than zero, controlling the electric automobile to execute a power-off action and simultaneously controlling the driving motor to stop rotating.
2. The method of claim 1, wherein said controlling said drive motor to stop rotating comprises:
generating a control signal according to the actual rotating speed and a target rotating speed, wherein the target rotating speed is zero;
and reducing the rotating speed of the driving motor to zero through a rotating speed ring according to the control signal.
3. The method of claim 1, further comprising:
and if the acquired actual rotating speed is equal to zero, controlling the electric automobile to execute electric operation.
4. The method of claim 1, wherein the detecting whether the electric vehicle is powered down comprises:
receiving a key signal, wherein the key signal comprises a power-down signal;
judging whether the key signal is the power-off signal or not;
and if the key signal is the power-off signal, detecting that the electric automobile is powered off.
5. A power-off device for an electric vehicle, comprising:
the detection module is used for detecting whether the electric automobile is powered off or not;
the acquisition module is used for acquiring the actual rotating speed of a driving motor of the electric automobile when the electric automobile is detected to be powered off and the current gear is neutral; and
and the first control module is used for controlling the driving motor to stop rotating while controlling the electric automobile to execute the power-off action when the acquired actual rotating speed is greater than zero.
6. The apparatus of claim 5, wherein the first control module comprises:
the generating unit is used for generating a control signal according to the actual rotating speed and a target rotating speed, wherein the target rotating speed is zero;
and the control unit is used for reducing the rotating speed of the driving motor to zero through a rotating speed ring according to the control signal.
7. The apparatus of claim 5, further comprising:
and the second control module is used for controlling the electric automobile to execute the electric operation when the acquired actual rotating speed is equal to zero.
8. The method of claim 5, wherein the detection module comprises:
a receiving unit for receiving a key signal, wherein the key signal comprises a down signal;
a judging unit for judging whether the key signal is the power-off signal;
and the detection unit is used for detecting that the electric automobile is powered off when the key signal is the power-off signal.
9. An electric vehicle comprising the power-off device of the electric vehicle according to any one of claims 5 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110099180.3A CN112848919A (en) | 2021-01-25 | 2021-01-25 | Power-off method and device of electric automobile and electric automobile |
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| CN202110099180.3A CN112848919A (en) | 2021-01-25 | 2021-01-25 | Power-off method and device of electric automobile and electric automobile |
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| CN113787618A (en) * | 2021-08-23 | 2021-12-14 | 三一汽车制造有限公司 | Mixing drum rotating speed control method and device and mixing truck |
| CN113787618B (en) * | 2021-08-23 | 2023-01-31 | 三一汽车制造有限公司 | Mixing drum rotating speed control method and device and mixing truck |
| WO2023024750A1 (en) * | 2021-08-23 | 2023-03-02 | 三一汽车制造有限公司 | Mixing drum rotation speed control method and apparatus, and mixer truck |
| CN114954010A (en) * | 2022-06-30 | 2022-08-30 | 四川野马汽车股份有限公司 | Electric vehicle power-off control method and system based on user power-off intention recognition |
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Application publication date: 20210528 |