CN113147724A - Control method and control device suitable for vehicle tire burst and vehicle - Google Patents
Control method and control device suitable for vehicle tire burst and vehicle Download PDFInfo
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- CN113147724A CN113147724A CN202110602103.5A CN202110602103A CN113147724A CN 113147724 A CN113147724 A CN 113147724A CN 202110602103 A CN202110602103 A CN 202110602103A CN 113147724 A CN113147724 A CN 113147724A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/20—Conjoint control of vehicle sub-units of different type or different function including control of steering systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/184—Conjoint control of vehicle sub-units of different type or different function including control of braking systems with wheel brakes
- B60W10/188—Conjoint control of vehicle sub-units of different type or different function including control of braking systems with wheel brakes hydraulic brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2530/00—Input parameters relating to vehicle conditions or values, not covered by groups B60W2510/00 or B60W2520/00
- B60W2530/20—Tyre data
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
Abstract
The invention relates to a control method and a control device suitable for vehicle tire burst and a vehicle, wherein the control method comprises the following steps: judging whether the vehicle has a tire burst according to the vehicle tire burst signal; if so, controlling the power-assisted steering motor to generate a preset steering resistance torque, applying a preset braking torque to rear axle wheels of the vehicle, and simultaneously controlling the driving torque of the vehicle to be reduced to 0 or the idle speed minimum torque. The invention relates to a control method and a control device suitable for vehicle tire burst and a vehicle, which are used for monitoring and adjusting steering resistance moment and braking moment instead of resistance or power parameters, can avoid unstable steering and rapid deflection of the vehicle in the tire burst moment, and can assist the braking of the whole vehicle to a certain extent by controlling the driving torque of the vehicle.
Description
Technical Field
The invention relates to the technical field of safe driving of vehicles, in particular to a control method and a control device suitable for vehicle tire burst and a vehicle.
Background
At present, accidents caused by tire burst are high in highway accidents, and the vehicle loses the normal running state, the steering wheel loses control and the vehicle deviates; the vehicle can be out of control, drift and turn around seriously. The tire burst during high-speed running is considered as the first killer of safety in a power running state, and meanwhile, the tire burst is a great problem which is strived to solve by various host factories and suppliers of automobiles at home and abroad.
In the related art, a method for controlling a direction of a vehicle after a tire burst occurs includes acquiring tire pressure information of the vehicle, judging whether the tire burst occurs or not, acquiring a current running speed of the vehicle, locking a steering wheel when the tire burst occurs and the current running speed of the vehicle is greater than a first preset speed, controlling the steering wheel to rotate within a preset rotation angle range to correct the vehicle when the current running speed is less than or equal to the first preset speed, and starting emergency braking when the tire burst occurs and a vehicle-mounted main control device does not acquire a braking signal within a first preset time.
However, the above control method is liable to cause unstable steering and rapid steering deflection at the moment of vehicle tire burst.
Therefore, it is necessary to design a new control method and a new control device suitable for vehicle tire burst to overcome the above problems.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device suitable for vehicle tire burst and a vehicle, and aims to solve the problems that steering instability and quick direction deflection are easily caused at the moment of vehicle tire burst in the related technology.
In a first aspect, a control method for a vehicle tire burst is provided, which includes: judging whether the vehicle has a tire burst according to the vehicle tire burst signal; if so, controlling the power-assisted steering motor to generate a preset steering resistance torque, applying a preset braking torque to rear axle wheels of the vehicle, and simultaneously controlling the driving torque of the vehicle to be reduced to 0 or the idle speed minimum torque.
In some embodiments, the controlling the steering assist motor to generate the preset steering resistance torque includes: when the vehicle tire burst signal identifies that a tire burst occurs on the front left wheel, the steering power-assisted motor generates the steering resistance torque in the clockwise direction; when the vehicle tire burst signal identifies that a tire burst occurs on the right front wheel, the steering power-assisted motor generates the steering resistance torque in the counterclockwise direction.
In some embodiments, the controlling the steering assist motor to generate a preset steering resistance torque further includes: at the moment of tire burst of the vehicle, controlling the numerical value of the steering resistance torque to be a first preset value and lasting for a first preset time t1(ii) a Determining t after a vehicle tire burst1At the moment, whether the distance between the central line of the vehicle and the lane lines on the two sides changes by less than 50 percent relative to the data change at the moment of tire burst or not is judged; if so, maintaining the value of the steering resisting moment as a first preset value, otherwise, controlling the value of the steering resisting moment to continuously increase from the first preset value to a second preset value according to a preset speed, and keeping the value constant.
In some embodiments, the applying a preset braking torque to the rear axle wheels of the vehicle includes: when the tire burst wheel is positioned on the front axle of the vehicle, brake fluid is pumped into the rear axle brake wheel cylinder through an oil pump in the vehicle, and a preset brake deceleration is generated for the rear axle wheel.
In some embodiments, the applying a preset braking torque to the rear axle wheels of the vehicle further includes: monitoring the stability state of the vehicle in real time in the process of braking the rear axle wheels; if the vehicle loses stability, the braking torque of the rear axle wheels is turned off or reduced.
In some embodiments, the controlling the driving torque of the vehicle to be reduced to 0 or the idle minimum torque includes: at the moment of tire burst of the vehicle, the driving torque of the vehicle is reduced to 0 or the idling minimum torque by means of quick fuel cut.
In a second aspect, there is provided a control device adapted for a vehicle tyre burst, comprising: the tire pressure monitoring unit is used for judging whether the vehicle has a tire burst according to the vehicle tire burst signal; an electric power steering control unit for controlling the power steering motor to generate a preset steering resistance torque; the electronic stability control unit is used for applying preset braking torque to rear axle wheels of the vehicle; and an engine control unit for controlling a driving torque of the vehicle to be reduced to 0 or an idle minimum torque.
In some embodiments, the electronic stability control unit is further configured to monitor the stability status of the vehicle in real time.
In some embodiments, the control device further comprises: the lane line identification unit is used for detecting and identifying lane line information in front of the vehicle in real time and calculating the distance between the central line of the vehicle and the lane lines on two sides; and a vehicle bus connecting the tire pressure monitoring unit, the electric power steering control unit, the electronic stability control unit, the engine control unit, and the lane line identification unit.
In a third aspect, a vehicle is provided, comprising: the vehicle tire burst control device comprises a vehicle frame and the control device which is arranged on the vehicle frame and is suitable for vehicle tire burst.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a control method, a control device and a vehicle suitable for vehicle tire burst, wherein when the vehicle has tire burst, a steering power-assisted motor is controlled to generate a preset steering resistance moment, a preset braking moment is applied to rear axle wheels of the vehicle, meanwhile, the driving torque of the vehicle is controlled to be reduced to 0 or the minimum idling torque, the steering resistance moment and the braking moment are used for monitoring and adjusting instead of resistance or power parameters, the unstable steering and the rapid deflection of the vehicle in the tire burst instant can be avoided, and meanwhile, the driving torque of the vehicle can be controlled to assist the braking of the whole vehicle to a certain extent.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a control method for vehicle tire burst according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of another control method for vehicle tire burst according to the embodiment of the invention;
fig. 3 is a schematic structural diagram of a control device suitable for a vehicle tire burst according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a control method and a control device suitable for vehicle tire burst, which can solve the problems that steering instability and quick direction deflection are easily generated at the moment of vehicle tire burst in the related art.
Referring to fig. 1, a control method for a vehicle tire burst according to an embodiment of the present invention may include the following steps:
s101: and judging whether the vehicle has a tire burst according to the vehicle tire burst signal.
In step S101, the vehicle tire burst signal is an event-type signal, enjoys the highest safety level and priority level, and can effectively identify the wheel position of a specific tire burst, such as whether a left front wheel is punctured or a right front wheel is punctured, and whether a left rear wheel is punctured or a right rear wheel is punctured.
S102: if so, controlling the power-assisted steering motor to generate a preset steering resistance torque, applying a preset braking torque to rear axle wheels of the vehicle, and simultaneously controlling the driving torque of the vehicle to be reduced to 0 or the idle speed minimum torque.
In some embodiments, in step 2, controlling the power steering motor to generate the preset steering resistance torque may include: when the vehicle tire burst signal discerns that front axle wheel appears blowing out, produce preset steering resistance moment immediately, prevent that the vehicle from turning to shakiness and the quick deflection of direction in the twinkling of an eye at blowing out, because the rear of blowing out appears in the front left wheel, the vehicle is restricted in the reduction of left front wheel driving radius, can appear deflecting fast left, consequently, the direction definition of steering resistance moment is: when the vehicle tire burst signal identifies that a tire burst occurs on the front left wheel, the steering power-assisted motor generates the steering resistance torque in the clockwise direction; when the vehicle tire burst signal identifies that a tire burst occurs on the right front wheel, the steering power-assisted motor generates the steering resistance torque in the counterclockwise direction.
In some optional embodiments, before step 2, the method may further include: the lane line information in front of the vehicle is detected and recognized in real time, and the distance between the center line of the vehicle and the lane lines on two sides, namely the distance between the center line of the vehicle and the lane line on the left side and the distance between the center line of the vehicle and the lane line on the right side are calculated.
In some optional embodiments, in step 2, controlling the power steering motor to generate the preset steering resistance torque may further include: at the moment of tire burst of the vehicle, controlling the numerical value of the steering resistance torque to be a first preset value and lasting for a first preset time t1In this embodiment, the first preset value is preferably 3NM, and the first preset time t is1Preferably 500ms, in other embodiments, the first preset value may also be less than 3 NM; determining t after a vehicle tire burst1At the moment, that is, at the moment of 500ms in this embodiment, whether the distance between the vehicle centerline and the lane lines on both sides changes by less than 50% with respect to the data change at the moment of tire burst, that is, whether the distance between the vehicle centerline and the lane lines on both sides changes by less than 50% at the moment of tire burst of the vehicle at the moment of 500ms after the vehicle bursts in this embodiment, compared with the distance between the vehicle centerline and the lane lines on both sides at the moment of tire burst of the vehicle; if so, maintaining the numerical value of the steering resistance torque as a first preset value, and if the distance between the central line of the vehicle and the lane lines at two sides at the moment of 500ms after the vehicle tire burst and the central line of the vehicle and the lane lines at the moment of the vehicle tire burstComparing the distance between the lane lines on the two sides, and controlling the value of the steering resisting moment to continuously increase from the first preset value to a second preset value according to a preset speed when the data change is more than or equal to 50%, and keeping the value constant until a driver takes over the steering operation of the vehicle steadily; in the embodiment, the numerical value of the steering resistance torque is preferably controlled and controlled to be continuously increased to 4.5NM at the moment of 1.07S from 3NM according to the rate of 1NM/S, in other embodiments, the numerical value of the second preset value can be between 3NM and 4.5NM, the functional safety of the whole vehicle is guaranteed, the situation that steering cannot be executed due to overlarge numerical value is avoided, different steering resistance torques are applied according to the change of creative ideal displacement at the moment of tire burst and 1.07S of tire burst, the steering torque limit value of the vehicle at a high speed is achieved, and transition steering can be avoided.
Further, when calculating the distance between the vehicle center line and the lane lines on the two sides, the distance between the vehicle center line and the lane line on the left side is DL, the distance between the vehicle center line and the lane line on the right side is DR, the width of the vehicle body is W, and the distance calculation formula between the left front wheel of the vehicle and the lane line on the left side is:
the distance calculation formula of the right front wheel and the right lane line of the vehicle is as follows:
in some optional embodiments, in step 2, the applying the preset braking torque to the rear axle wheels of the vehicle may include: when a vehicle tire burst event type signal is detected and a tire burst wheel is positioned on a front axle of the vehicle, when a driver does not press a brake pedal, brake fluid is pumped into a rear axle brake wheel cylinder through an oil pump in the vehicle to generate a preset brake deceleration for the rear axle wheel, and in the embodiment, the brake deceleration of 0.3g is preferably generated for the rear axle wheel; if the tire burst wheel is positioned on the rear axle of the vehicle, the vehicle can be assisted to decelerate through certain braking of the rear axle on the premise of not causing instability of the vehicle.
In some optional embodiments, in step 2, the applying a preset braking torque to the rear axle wheels of the vehicle may further include: monitoring the stability state of the vehicle in real time in the process of braking the rear axle wheels; when the road surface adhesion coefficient is insufficient or the vehicle loses stability or has a risk of instability and the like due to other related factors in the continuous braking process, the braking torque of rear axle wheels can be turned off or reduced in an arbitration mode, the active braking function of the rear axle of the vehicle is cancelled, the vehicle enters a corresponding safety control module, such as electronic brake force distribution (EBD) of the rear axle, an ABS function and the like, and the purposes of quickly responding to the quick control requirement of the tire burst working condition and finely and specifically adjusting the subsequent operation process are achieved through the combination of preset tire burst control logic, real-time monitoring of the road condition and operation auxiliary conditions obtained by calculating control parameters. The problem that the emergency braking action can possibly cause the stability of the vehicle to be lost under specific working conditions such as unbalanced front axle braking torque caused by wet and slippery road surfaces or collision is solved.
In some optional embodiments, in step 2, controlling the driving torque of the vehicle to be reduced to 0 or the idle minimum torque may include: at the moment of tire burst of the vehicle, the driving torque of the vehicle is reduced to 0 or the minimum idling torque in a quick fuel cut-off mode, the idling torque braking effect of the engine is exerted, and the braking of the whole vehicle can be assisted to a certain extent.
An embodiment of the present invention further provides a control device for a vehicle tire burst, which may include: a Tire Pressure Monitoring System (TPMS) for determining whether a vehicle has a Tire burst according to a vehicle Tire burst signal, and determining which Tire of the vehicle has a Tire burst; an Electric Power Steering control unit (EPS) for controlling a Steering assist motor to generate a preset Steering resistance torque; the Electronic Stability Control system comprises an Electronic Stability Control (ESC) which is used for applying a preset braking torque to rear axle wheels of a vehicle, and the Electronic Stability Control (ESC) carries out information communication according to a set signal interface, so that the Electronic Stability Control (ESC) can meet the normal ABS (anti-lock braking system) and ESC functions of the vehicle and also support the rear axle active braking function driven by a tire burst signal; and an Engine control unit (EMS) for controlling a driving torque of the vehicle to be reduced to 0 or an idle minimum torque, because the Control device is provided with a Tire Pressure Monitoring unit (TPMS), an Electric Power Steering Control unit (EPS), an Electronic Stability Control (ESC) and an Engine Control unit (EMS), the Tire burst information of the vehicle can be detected in real time, meanwhile, the steering resistance torque generated by the power-assisted steering motor and the braking torque applied to the rear axle wheels are used for monitoring and adjusting instead of resistance or power parameters, the steering device can avoid unstable steering and quick deflection of the vehicle in the direction at the moment of tire burst, and simultaneously, the driving torque of the vehicle can be controlled to assist the braking of the whole vehicle to a certain extent.
Further, the controlling the power steering motor to generate the preset steering resistance torque may include any embodiment included in the controlling method, and the applying the preset braking torque to the rear axle wheels of the vehicle may include any embodiment included in the controlling method, and the controlling the driving torque of the vehicle to be reduced to 0 or the idle minimum torque may include any embodiment included in the controlling method, in which the controlling the power steering motor to generate the preset steering resistance torque, and the controlling the driving torque of the vehicle to be reduced to 0 or the idle minimum torque.
In some optional embodiments, the Electronic Stability Control (ESC) may also be used to monitor the Stability status of the vehicle in real time, and during braking of the rear axle wheels, when there is a risk that the vehicle loses Stability or loses Stability due to insufficient road adhesion coefficient or other relevant factors during continuous braking, the braking torque of the rear axle wheels may be turned off or reduced in an arbitration manner.
In some optional embodiments, the control device may further include: the Lane line identification unit (LDW) is used for detecting and identifying Lane line information in front of a vehicle in real time and calculating the distance between the center line of the vehicle and the Lane lines on two sides respectively, namely the distance between the center line of the vehicle and the Lane line on the left side and the distance between the center line of the vehicle and the Lane line on the right side; the Lane line identification unit (LDW) may also send the distance data between the vehicle center line and the Lane lines on both sides to the vehicle CAN network according to a set communication protocol, so that a subsequent Electric Power Steering control unit (EPS) may control the magnitude of the Steering resistance torque according to the change in the distance between the vehicle center line and the Lane lines on both sides, in this embodiment, the data of the Lane lines of the forward camera used by the driver assistance system is mainly used as an input value to be input to the Lane line identification unit; the control device may further include a vehicle BUS (CAN BUS) connecting the tire pressure monitoring unit, the electric power steering control unit, the electronic stability control unit, the engine control unit, and the lane line identification unit, so that the tire pressure monitoring unit, the electric power steering control unit, the electronic stability control unit, the engine control unit and the lane line identification unit CAN perform information interaction through the vehicle BUS (CAN BUS), and each associated control unit receives signals according to a set communication protocol, and the vehicle CAN detect a tire burst event type signal from a vehicle bus CAN network, an independent controller is not required to be additionally added to realize the function of keeping the vehicle running in the lane direction after the vehicle has a tire burst, and each control unit coordinately works according to a set signal communication interface and a function software module. The control device is used for controlling a steering power-assisted motor to generate a preset steering resistance moment by an electric power-assisted steering control unit (EPS) in combination with lane line information detected by a lane line identification unit (LDW) when receiving a tire burst signal of the vehicle detected by a tire pressure monitoring unit (TPMS); meanwhile, an electronic stability control unit (ESC) provides a preset braking target deceleration; the engine control unit (EMS) reduces the driving force to the idle speed torque state of the vehicle through a quick fuel cut-off mode, achieves the purposes of quickly responding to the quick control requirement of the tire burst working condition and finely and specifically adjusting the subsequent operation procedures, and achieves the function of keeping the lane direction driving after the vehicle bursts.
An embodiment of the present invention further provides a vehicle, which may include: the vehicle is provided with the control device, so that the vehicle can realize the function of keeping the vehicle running in the lane direction after the vehicle is blown out.
The embodiment of the invention provides a control method and a control device suitable for vehicle tire burst and a vehicle, and the principle of the vehicle is as follows:
because the steering power-assisted motor is controlled to generate the preset steering resistance torque when the tire burst happens to the vehicle, the preset braking torque is applied to the rear axle wheels of the vehicle, meanwhile, the driving torque of the vehicle is controlled to be reduced to 0 or the minimum idling torque, the combination of the preset tire burst control logic, the real-time monitoring of road conditions and the operation auxiliary conditions obtained by the calculation of control parameters achieves the rapid control requirement of rapidly responding to the tire burst working condition and the fine specific adjustment of subsequent operation procedures, the problem that the vehicle loses stability due to the fact that the emergency braking action is possibly carried out under the specific working conditions such as the imbalance of the front axle braking torque caused by wet and slippery road surfaces or collision is avoided, in addition, the steering resistance torque and the braking torque are used for monitoring and adjusting instead of resistance or power parameters, and the rapid steering and direction deflection of the vehicle in the tire burst instant can be avoided, meanwhile, the driving torque of the vehicle is controlled to assist the braking of the whole vehicle to a certain extent, the control strategy of the vehicle is not conflicted with the regulation and control strategies of other safety systems, the universality is better, the functional operation of the vehicle is not influenced, and the active braking function of the rear axle driven by a tire burst signal is supported besides the normal ABS and ESC functions of the vehicle.
Through the description of the above embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A control method suitable for a vehicle tyre burst, characterized in that it comprises the following steps:
judging whether the vehicle has a tire burst according to the vehicle tire burst signal;
if so, controlling the power-assisted steering motor to generate a preset steering resistance torque, applying a preset braking torque to rear axle wheels of the vehicle, and simultaneously controlling the driving torque of the vehicle to be reduced to 0 or the idle speed minimum torque.
2. The control method for a vehicle tire burst according to claim 1, wherein the controlling the steering assist motor to generate a preset steering resistance torque comprises:
when the vehicle tire burst signal identifies that a tire burst occurs on the front left wheel, the steering power-assisted motor generates the steering resistance torque in the clockwise direction;
when the vehicle tire burst signal identifies that a tire burst occurs on the right front wheel, the steering power-assisted motor generates the steering resistance torque in the counterclockwise direction.
3. The control method for a vehicle tire puncture according to claim 2, wherein the controlling the steering assist motor to generate a preset steering resistance torque, further comprises:
at the moment of tire burst of the vehicle, controlling the numerical value of the steering resistance torque to be a first preset value and lasting for a first preset time t1；
Determining t after a vehicle tire burst1At the moment, whether the distance between the central line of the vehicle and the lane lines on the two sides changes by less than 50 percent relative to the data change at the moment of tire burst or not is judged;
if so, maintaining the value of the steering resistance torque as a first preset value,
otherwise, controlling the value of the steering resistance torque to continuously increase from the first preset value to a second preset value according to a preset speed rate, and keeping the value constant.
4. A control method for a vehicle tire burst as set forth in claim 1, wherein said applying a preset braking torque to rear axle wheels of the vehicle comprises:
when the tire burst wheel is positioned on the front axle of the vehicle, brake fluid is pumped into the rear axle brake wheel cylinder through an oil pump in the vehicle, and a preset brake deceleration is generated for the rear axle wheel.
5. A control method for a vehicle tire burst as set forth in claim 4, wherein said applying a preset braking torque to rear axle wheels of the vehicle further comprises:
monitoring the stability state of the vehicle in real time in the process of braking the rear axle wheels;
if the vehicle loses stability, the braking torque of the rear axle wheels is turned off or reduced.
6. A control method adapted for a vehicle tire burst as set forth in claim 1, wherein said controlling the driving torque of the vehicle to be reduced to 0 or an idle minimum torque comprises:
at the moment of tire burst of the vehicle, the driving torque of the vehicle is reduced to 0 or the idling minimum torque by means of quick fuel cut.
7. A control device adapted for use in a vehicle tyre burst, characterized in that it comprises:
the tire pressure monitoring unit is used for judging whether the vehicle has a tire burst according to the vehicle tire burst signal;
an electric power steering control unit for controlling the power steering motor to generate a preset steering resistance torque;
the electronic stability control unit is used for applying preset braking torque to rear axle wheels of the vehicle;
and an engine control unit for controlling a driving torque of the vehicle to be reduced to 0 or an idle minimum torque.
8. A control device adapted for a vehicle tire burst as set forth in claim 7, wherein:
the electronic stability control unit is also used for monitoring the stability state of the vehicle in real time.
9. A control device adapted for a vehicle tire burst as set forth in claim 7, wherein said control device further comprises:
the lane line identification unit is used for detecting and identifying lane line information in front of the vehicle in real time and calculating the distance between the central line of the vehicle and the lane lines on two sides;
and a vehicle bus connecting the tire pressure monitoring unit, the electric power steering control unit, the electronic stability control unit, the engine control unit, and the lane line identification unit.
10. A vehicle, characterized in that it comprises: a vehicle frame, and a control device for a vehicle tyre burst as claimed in any one of claims 7-9 mounted on the vehicle frame.
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