CN110901756A - Steering pump failure safety control method, readable storage medium and terminal equipment - Google Patents
Steering pump failure safety control method, readable storage medium and terminal equipment Download PDFInfo
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- CN110901756A CN110901756A CN201911348851.4A CN201911348851A CN110901756A CN 110901756 A CN110901756 A CN 110901756A CN 201911348851 A CN201911348851 A CN 201911348851A CN 110901756 A CN110901756 A CN 110901756A
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- Prior art keywords
- vehicle
- steering pump
- motor
- control method
- braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
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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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- 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)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention belongs to a safety control method of a pure electric vehicle, and provides a safety control method of failure of a steering pump, a computer readable storage medium and a terminal device, which solve the technical problem that when the steering pump fails in the prior art, a VCU only carries out high-pressure processing to influence the driving safety.
Description
Technical Field
The invention belongs to a safety control method of a pure electric vehicle, and particularly relates to a failure safety control method of a steering pump of the pure electric vehicle, a readable storage medium and terminal equipment.
Background
Under the influence of energy limitation and environmental protection pressure, the pure electric vehicle is rapidly developed by virtue of the advantages of zero emission, no pollution and low use cost. However, compared with the conventional automobile, the accumulated experience of the electric automobile is still insufficient, and especially the integration and research strength of the whole automobile safety system are still to be strengthened.
As shown in fig. 1, the high-voltage topological diagram of the whole vehicle of the conventional general electric vehicle is shown, and each working unit of the vehicle, such as a steering pump motor, an air compressor motor, a storage battery, an air conditioner and a motor, is controlled by a corresponding controller to operate, and the on-off of each working unit is controlled by the on-off of a corresponding relay between each working unit and a battery pack, wherein MC1 is a main negative relay of the battery, MC2 is a main drive motor relay, MC3 is an auxiliary control pre-charge resistance relay, and MC4 is an auxiliary control relay. The VCU is connected with each working unit of the vehicle, collects the working state of each working unit and sends a control instruction to each working unit.
In the prior art, if a steering pump fails during driving, most VCUs (vehicle-mounted communication devices) receive failure feedback and then immediately cut off high voltage, so that other working units of a whole vehicle safety system are out of control, serious casualties can be caused in serious conditions, and accidents are caused. Because the VCU can only simply perform the high voltage interruption processing, the driving safety function of the current electric vehicle is still incomplete.
Disclosure of Invention
The invention mainly aims to solve the technical problem that driving safety is affected by only high-voltage switching-off processing of a VCU when a steering pump fails in the prior art, and provides a steering pump failure safety control method, a computer readable storage medium and a terminal device.
In order to achieve the purpose, the invention provides the following technical scheme:
the steering pump failure safety control method is characterized by comprising the following steps of:
s1, the VCU detects that the steering pump is invalid and sends an auxiliary braking instruction to a motor of the vehicle;
s2, after the motor receives the auxiliary braking instruction, the motor outputs the maximum braking torque to assist braking, and meanwhile, the motor performs manual mechanical braking until the vehicle running speed is less than 5 km/h;
s3, the VCU controls the motor to stop outputting the braking torque;
s4, the VCU sends a neutral gear instruction back to the gearbox controller;
and S5, after the transmission controller receives the neutral gear returning instruction, the transmission controller controls the transmission to enable the vehicle to be in a neutral gear state, and the manual mechanical braking is continued until the vehicle running speed is zero.
Further, in step S1, the VCU sends an auxiliary braking command to the motor of the vehicle, and sends a prompt message to a display device in the cab of the vehicle.
Further, the prompt message is STOP.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, is characterized in that it carries out the steps of the method as described above.
A terminal device comprising a memory, a processor and a computer program stored in said memory and being executable on said processor, characterized in that said processor implements the steps of the method as described above when executing said computer program.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the steering pump failure safety control method, when the VCU detects that the steering pump fails, the motor is controlled to provide the maximum auxiliary braking force while the VCU brakes manually and mechanically, so that the vehicle stops as soon as possible, instead of directly processing the vehicle under high pressure, the danger of possible failure of each working unit caused by directly processing the vehicle under high pressure in the high-speed driving process is avoided, and the driving safety of the pure electric vehicle is effectively improved.
2. When the VCU detects that the steering pump fails, the warning information is sent to the display device to remind a driver of the occurrence of the fault, so that manual mechanical braking can be adopted in time, and a vehicle can be braked as soon as possible.
3. The computer readable storage medium of the invention can store the safety control method as a program, and the control method can be realized when the computer program is executed by the processor, so that the aim of controlling the running safety of the pure electric vehicle is finally fulfilled.
4. The control device can store the control method as a program, and the processor can execute the program to realize the control of the running safety of the pure electric vehicle.
Drawings
FIG. 1 is a high voltage topology of an electric vehicle in the background art;
FIG. 2 is a flow chart of an embodiment of a steering pump fail-safe control method of the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments do not limit the present invention.
The pure electric vehicles have the fault that a steering pump fails in the driving process, and if the pure electric vehicles directly go down to high voltage, the problem that other working units lose power can occur, so that accidents occur in the driving process.
The invention discloses a steering pump failure safety control method, which comprises the following steps:
s1, the VCU detects that the steering pump is invalid and sends an auxiliary braking instruction to a motor of the vehicle;
s2, after the motor receives the auxiliary braking instruction, the motor outputs the maximum braking torque to assist braking, the vehicle is assisted to decelerate to a stop as soon as possible by the maximum braking torque, and meanwhile, the manual mechanical braking is carried out until the running speed of the vehicle is less than 5 km/h;
s3, the VCU controls the motor to stop outputting the braking torque, and the vehicle can be decelerated only by the manual mechanical brake without performing auxiliary brake because the vehicle is reduced to a lower speed;
s4, continuing manual mechanical braking, and sending a neutral gear instruction back to the transmission controller by the VCU to enable the vehicle to be in a neutral gear state;
and S5, after the transmission controller receives the neutral gear returning instruction, the transmission is controlled to enable the vehicle to be in a neutral gear state, manual mechanical braking is continued until the vehicle running speed is zero, and the vehicle stops completely at the moment.
Under the condition that a vehicle steering pump fails, the motor outputs the maximum braking torque to assist braking, so that the vehicle is stopped at the highest speed, and safety accidents caused by direct high pressure are avoided.
Referring to fig. 2, when the VCU receives the feedback of the failure of the steering pump and the electric control of the motor is failure-free, the VCU sends a command to the motor and sends a prompt message to a display device in the cab of the vehicle, the display device is generally an instrument panel, a STOP lamp on the instrument panel is lighted, the VCU controls the motor to output a maximum braking torque as an auxiliary brake, the maximum torque must meet the braking force distribution of the whole vehicle to assist the driver to brake, and when the driver of the vehicle sees that the STOP lamp is lighted, the driver of the vehicle brakes the manual mechanical brake to decelerate the vehicle through the motor auxiliary brake and the manual mechanical brake, when the VCU detects that the vehicle speed is less than 5km/h, the braking torque output by the motor is removed to cancel the auxiliary brake, and controlling the whole vehicle to return to a neutral gear, and continuing manual mechanical braking until the vehicle is completely stopped.
The security control method of the present invention can be applied to a computer-readable storage medium in which a computer program is stored, and the security control method can be stored as a computer program in the computer-readable storage medium, and the steps of the security control method can be realized when the computer program is executed by a processor.
In addition, the security control method of the present invention may also be applied to a terminal device, where the terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the landing control method of the present invention when executing the computer program. The terminal device here may be a computer, a notebook, a palm computer, and various computing devices such as a cloud server, and the processor may be a general processor, a digital signal processor, an application specific integrated circuit, or other programmable logic devices.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. The steering pump failure safety control method is characterized by comprising the following steps of:
s1, the VCU detects that the steering pump is invalid and sends an auxiliary braking instruction to a motor of the vehicle;
s2, after the motor receives the auxiliary braking instruction, the motor outputs the maximum braking torque to assist braking, and meanwhile, the motor performs manual mechanical braking until the vehicle running speed is less than 5 km/h;
s3, the VCU controls the motor to stop outputting the braking torque;
s4, the VCU sends a neutral gear instruction back to the gearbox controller;
and S5, after the transmission controller receives the neutral gear returning instruction, the transmission controller controls the transmission to enable the vehicle to be in a neutral gear state, and the manual mechanical braking is continued until the vehicle running speed is zero.
2. The steering pump fail-safe control method of claim 1, wherein in step S1, the auxiliary braking command is sent to a motor of the vehicle, and the VCU sends a prompt message to a display device in a cab of the vehicle.
3. A steering pump fail-safe control method as set forth in claim 2, wherein: the prompt message is STOP.
4. A computer-readable storage medium having stored thereon a computer program, characterized in that: the program when executed by a processor implementing the steps of the method according to any one of claims 1 to 3.
5. A terminal device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: the processor, when executing the computer program, realizes the steps of the method according to any of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348851.4A CN110901756A (en) | 2019-12-24 | 2019-12-24 | Steering pump failure safety control method, readable storage medium and terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348851.4A CN110901756A (en) | 2019-12-24 | 2019-12-24 | Steering pump failure safety control method, readable storage medium and terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110901756A true CN110901756A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911348851.4A Pending CN110901756A (en) | 2019-12-24 | 2019-12-24 | Steering pump failure safety control method, readable storage medium and terminal equipment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883707A (en) * | 2007-12-27 | 2010-11-10 | 株式会社捷太格特 | Electrically driven power steering device |
| CN102756665A (en) * | 2012-07-09 | 2012-10-31 | 天津市松正电动汽车技术股份有限公司 | Pure power-driven power system |
| CN104986042A (en) * | 2015-06-10 | 2015-10-21 | 潍柴动力股份有限公司 | High-voltage system fault detection method and device |
| CN106114616A (en) * | 2016-06-27 | 2016-11-16 | 北京思泰嘉业新能源汽车部件有限公司 | The control method of a kind of electric automotive steering pump and system |
| CN207758862U (en) * | 2018-01-08 | 2018-08-24 | 东菱技术有限公司 | A kind of novel electric vehicle power-assisted steering pump controller |
-
2019
- 2019-12-24 CN CN201911348851.4A patent/CN110901756A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883707A (en) * | 2007-12-27 | 2010-11-10 | 株式会社捷太格特 | Electrically driven power steering device |
| CN102756665A (en) * | 2012-07-09 | 2012-10-31 | 天津市松正电动汽车技术股份有限公司 | Pure power-driven power system |
| CN104986042A (en) * | 2015-06-10 | 2015-10-21 | 潍柴动力股份有限公司 | High-voltage system fault detection method and device |
| CN106114616A (en) * | 2016-06-27 | 2016-11-16 | 北京思泰嘉业新能源汽车部件有限公司 | The control method of a kind of electric automotive steering pump and system |
| CN207758862U (en) * | 2018-01-08 | 2018-08-24 | 东菱技术有限公司 | A kind of novel electric vehicle power-assisted steering pump controller |
Non-Patent Citations (1)
| Title |
|---|
| 北京中德安驾科技发展有限公司: "《安全驾驶伴你行》", 31 August 2010 * |
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Application publication date: 20200324 |