CN110816643A - Control system and control method for preventing steering wheel from rotating during automobile collision and automobile - Google Patents
Control system and control method for preventing steering wheel from rotating during automobile collision and automobile Download PDFInfo
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- CN110816643A CN110816643A CN201910717446.9A CN201910717446A CN110816643A CN 110816643 A CN110816643 A CN 110816643A CN 201910717446 A CN201910717446 A CN 201910717446A CN 110816643 A CN110816643 A CN 110816643A
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- electric power
- steering
- power steering
- vehicle speed
- steering wheel
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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
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
- B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle
- B60K28/14—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle responsive to accident or emergency, e.g. deceleration, tilt of vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01204—Actuation parameters of safety arrangents
- B60R2021/01211—Expansion of air bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01204—Actuation parameters of safety arrangents
- B60R2021/01252—Devices other than bags
- B60R2021/01265—Seat belts
- B60R2021/01272—Belt tensioners
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Air Bags (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The invention relates to the technical field of automobile manufacturing, and particularly discloses a control system and a control method for preventing a steering wheel from rotating during automobile collision and an automobile. The safety system electronic control unit in the control system is electrically connected with the electric power steering system, so that data transmission and exchange are realized, the electric power steering system can identify and receive the safety system ignition instruction of automobile collision, and the steering of a steering wheel can be locked; the electric power-assisted steering system is also electrically connected with the data communication bus, can receive a vehicle speed signal sent by the data communication bus and relieves the steering of the steering wheel. The automobile is provided with the control system, so that the phenomenon that the steering wheel rotates along with the deflection of the wheels in the automobile collision can be avoided, and the protection effect of the safety airbag is improved. And the control system does not increase extra parts, only utilizes the existing vehicle body system to carry out function integration, and the control method is simple and easy to implement.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a control system and a control method for preventing a steering wheel from rotating during automobile collision and an automobile.
Background
With the increasing popularization of automobiles, traffic accidents are gradually increased. An air bag in an automobile is a passive safety protection system, and can be matched with a seat belt for use, so that effective anti-collision protection can be provided for passengers. When the automobile collides, the safety air bag can effectively protect the head and the chest of a human body so as to prevent the head and the chest from being injured or reduce the injury degree. The driver-side airbag is disposed in the steering wheel and the passenger-side airbag is typically disposed on the instrument panel.
When the automobile is collided, the steering wheel is usually rotated to different degrees along with the deflection of the wheels, so that the safety airbag on the side of the driver is deflected, the protection effect is reduced, and the safety of the driver is affected.
Disclosure of Invention
An object of the present invention is to provide a control system for preventing a steering wheel from rotating during a car collision, which can prevent the steering wheel from rotating along with the deflection of wheels during the car collision, and improve the protection effect of an airbag.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control system for preventing rotation of a steering wheel in a collision of a vehicle, comprising:
a safety system electronic control unit configured to be able to acquire a processed collision signal and send a safety system ignition instruction;
a data communication bus electrically connected to the safety system electronic control unit, the data communication bus configured to receive the safety system ignition command;
the vehicle speed detection unit is electrically connected with the data communication bus and is used for acquiring vehicle speed information of wheels and sending the vehicle speed information to the data communication bus;
an electric power steering system electrically connected to the safety system electronic control unit and the data communication bus and configured to receive the safety system ignition command and lock steering of a steering wheel according to the safety system ignition command; the electric power steering system is also configured to receive a vehicle speed signal of the data communication bus and release a steering lock-up state of the steering wheel according to the vehicle speed signal.
As a preferable technical solution of the above control system, the safety system electronic control unit includes an airbag controller, and a detector and an actuator electrically connected to the airbag controller, the airbag controller is installed at a front portion or a middle portion of a vehicle tunnel, the detector is configured to acquire the collision signal, and the airbag controller is configured to receive the collision signal and send an execution signal to the actuator.
As a preferable aspect of the control system, the detector includes a collision sensor, and the actuator includes an airbag ignition device and a seatbelt tensioning device.
As a preferable aspect of the control system, the collision sensor includes a center collision sensor provided at a front portion of the vehicle, a left front collision sensor provided at a left side of the vehicle, and a right front collision sensor provided at a right side of the vehicle.
As a preferred technical solution of the above control system, the electric power steering system includes an electric power steering electronic control unit and an electric power steering motor electrically connected thereto, the electric power steering electronic control unit is electrically connected to the safety system electronic control unit and the data communication bus, the electric power steering motor is in transmission connection with the steering wheel, and the electric power steering electronic control unit is configured to be capable of controlling the electric power steering motor to be locked according to the safety system ignition instruction so as to lock the steering of the steering wheel; the electric power steering electronic control unit is further configured to be able to release the lock-up state of the electric power steering motor in accordance with the vehicle speed signal to resume rotation of the steering wheel.
As a preferable technical solution of the above control system, the electric power steering system further includes a steering mechanism in transmission connection with the electric power steering motor, one end of the steering mechanism is connected with the steering wheel, and the other end is connected with the wheels.
As a preferable technical solution of the above control system, the vehicle speed detecting unit includes a vehicle speed sensor electrically connected to the data communication bus, and the vehicle speed sensor is mounted in the transaxle case or the transmission case.
Another object of the present invention is to provide a control method for preventing a steering wheel from rotating during an automobile collision, which can effectively prevent the steering wheel from rotating along with the deflection of wheels during the automobile collision, and improve the protection effect of an airbag.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method for preventing the steering wheel from rotating in the collision of the automobile adopts the control system for preventing the steering wheel from rotating in the collision of the automobile, and comprises the following steps:
when the automobile collides, the safety airbag controller of the safety system electronic control unit simultaneously transmits a safety system ignition instruction to the data communication bus and the electric power steering electronic control unit of the electric power steering system;
after receiving the ignition instruction of the safety system, the electric power steering electronic control unit controls a steering mechanism of the electric power steering system to be locked by controlling an electric power steering motor of the electric power steering system to be locked, and the steering mechanism locks the steering of a steering wheel;
the electric power steering electronic control unit receives a vehicle speed signal sent by the data communication bus, and can selectively remove the locking state of the electric power steering motor according to the vehicle speed signal to recover the steering of the steering wheel.
As a preferable technical solution of the control method, the electric power steering electronic control unit compares a vehicle speed corresponding to the vehicle speed signal with a preset threshold, and if the vehicle speed is lower than the preset threshold, executes the step of releasing the lock state of the electric power steering motor.
Still another object of the present invention is to provide an automobile, which can effectively prevent the steering wheel from rotating along with the deflection of the wheels during the collision of the automobile, and improve the protection effect of the airbag.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automobile applies the control method for preventing the steering wheel from rotating when the automobile collides.
Compared with the prior art, the invention has the advantages and beneficial effects that:
the invention provides a control system and a control method for preventing a steering wheel from rotating when an automobile collides, and the automobile.A safety system electric control unit in the control system is electrically connected with an electric power steering system, so that data transmission and exchange are realized, the electric power steering system can identify and receive a safety system ignition instruction of automobile collision and can lock the steering of the steering wheel; the electric power-assisted steering system is also electrically connected with the data communication bus, can receive a vehicle speed signal sent by the data communication bus and relieves the steering of the steering wheel. The automobile is provided with the control system, so that the phenomenon that the steering wheel rotates along with the deflection of the wheels in the automobile collision can be avoided, and the protection effect of the safety airbag is improved. And the control system does not increase extra parts, only utilizes the existing vehicle body system to carry out function integration, and the control method is simple and easy to implement.
Drawings
Fig. 1 is a schematic diagram of a control system for preventing a steering wheel from rotating in a collision of an automobile according to an embodiment of the present invention.
In the figure:
1-a security system electronic control unit; 2-a data communication bus; 3-vehicle speed detection unit; 4, an electric power steering electronic control unit; 5, an electric power steering motor; 6-a steering mechanism; 7-a steering wheel; 8-vehicle wheels.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The embodiment provides a control system for preventing a steering wheel from rotating in the process of automobile collision, no additional part is added in the control system, only the existing automobile body system is utilized for function integration, the control method is simple and easy to implement, the phenomenon that the steering wheel 7 rotates along with the deflection of wheels 8 in the process of automobile collision is prevented, and the protection effect on a driver is improved.
As shown in fig. 1, the control system for preventing the steering wheel from rotating during the collision of the automobile according to the present embodiment includes a safety system electronic control unit 1, a data communication bus 2, a vehicle speed detection unit 3, and an electric power steering system. The safety system electronic control unit 1, the data communication bus 2 and the electric power steering system are electrically connected, and the safety system electronic control unit 1 can acquire and process collision signals and send safety system ignition instructions to the data communication bus 2 and the electric power steering system. The electric power steering system is also electrically connected with the data communication bus 2, can simultaneously receive the data communication bus 2 and a safety system ignition instruction of the safety system electronic control unit 1, and can lock the steering of the steering wheel 7 according to the instruction after receiving the safety system ignition instruction so as to prevent the steering wheel from rotating along with the deflection of the wheels 8.
The vehicle speed detection unit 3 is electrically connected with the data communication bus 2, and the vehicle speed detection unit 3 is used for acquiring vehicle speed information of the vehicle wheel 8 and sending the vehicle speed information to the data communication bus 2. The electric power steering system can receive a vehicle speed signal sent by the data communication bus 2, compare the vehicle speed corresponding to the vehicle speed signal with a preset threshold value, and if the vehicle speed is lower than the preset threshold value, remove the steering lock state of the steering wheel 7 and recover the rotation function of the steering wheel 7. If the vehicle speed is higher than the preset threshold value, the steering lock state of the steering wheel 7 is continuously maintained. Specifically, the vehicle speed detection unit 3 includes a vehicle speed sensor electrically connected to the data communication bus 2, and the vehicle speed sensor is mounted in the transaxle case or the transmission case, and the structure thereof is prior art and is not described herein again.
The data communication bus 2, namely a CAN bus (Controller Area Network), is a serial communication Network that effectively supports distributed control or real-time control, and is responsible for data communication among electronic control systems of the automobile. The method has the advantages of strong real-time performance of data communication among nodes of the network, short development period and the like.
Specifically, the safety system electronic control unit 1 includes an airbag controller, and a detector and an actuator electrically connected to the airbag controller. The safety air bag controller is a core component of a passive safety system of an automobile and mainly comprises system hardware and system software. Typically in the front or middle of a vehicle tunnel. Common product models are Oriental Jiule L23052 and the like. The safety airbag controller is electrically connected with the data communication bus 2 and the electric power steering system and is used for sending a safety system ignition instruction. The detector is used for acquiring a collision signal, the safety airbag controller receives the collision signal and processes the collision signal through an algorithm to judge whether an ignition signal is sent out or not, and sends an execution signal to actuators such as an airbag ignition device, a safety belt tensioning device and the like and a safety system ignition instruction to the data communication bus 2 and the electric power steering system according to a judgment result. Meanwhile, the airbag controller needs to communicate with other control units of the vehicle body, such as a vehicle door controller and the like, and the details are not repeated herein.
Still further, the detector includes an impact sensor. The collision sensor includes a center collision sensor provided in a front portion of the automobile, a left front collision sensor provided in a left side of the automobile, and a right front collision sensor provided in a right side of the automobile. The structure of the collision sensor is the existing structure and is not described in detail here.
An Electric Power Steering (EPS) system includes an Electric Power Steering (EPS) electronic control unit (4) and an Electric Power Steering (EPS) motor (5) electrically connected thereto. The electric power steering electronic control unit 4 is a control mechanism of an electric power steering system, and the electric power steering motor 5 is an actuator of the electric power steering system. When a driver steers the steering wheel 7, the electric power steering electronic control unit 4 outputs an execution instruction through a torque voltage signal, a rotation direction, a vehicle speed signal and the like detected by the torque sensor, so that the electric power steering motor 5 outputs a steering power steering torque of a corresponding magnitude and direction, thereby generating auxiliary power. When the automobile does not turn, the electric power steering electronic control unit 4 does not send an instruction to the controller of the electric power steering motor 5, and the electric power steering motor 5 does not work.
In the present embodiment, the electric power steering control unit 4 is electrically connected to the airbag controller and the data communication bus 2, the electric power steering motor 5 is drivingly connected to the steering wheel 7, and the electric power steering control unit 4 is configured to control the electric power steering motor 5 to be locked according to the safety system ignition command, so as to lock the steering wheel 7 to prevent the steering wheel 7 from rotating during a collision. The electric power steering electronic control unit 4 also receives a vehicle speed signal of the data communication bus 2, and can judge whether to release the locking state of the electric power steering motor 5 by comparing the vehicle speed corresponding to the vehicle speed signal with a preset threshold value so as to recover the rotating function of the steering wheel 7. And if the vehicle speed is lower than the preset threshold value, the steering lock-up state of the steering wheel 7 is released, and the rotating function of the steering wheel 7 is recovered. If the vehicle speed is higher than the preset threshold value, the steering lock state of the steering wheel 7 is continuously maintained.
Furthermore, the electric power steering system further comprises a steering mechanism 6 in transmission connection with the electric power steering motor 5, wherein one end of the steering mechanism 6 is connected with a steering wheel 7, and the other end is connected with wheels 8. The electric power steering motor 5 controls the steering of a steering wheel 7 through a steering mechanism 6.
The embodiment also provides a control method for preventing the steering wheel from rotating during the collision of the automobile, and the control system for preventing the steering wheel from rotating during the collision of the automobile mainly comprises the following steps:
when the automobile collides, the safety airbag controller simultaneously sends a safety system ignition instruction to the data communication bus 2 and the electric power steering electronic control unit 4;
after receiving the ignition instruction of the safety system, the electric power steering electronic control unit 4 controls the electric power steering motor 5 to be locked to control the steering mechanism 6 to be locked, and the steering mechanism 6 locks the steering of the steering wheel 7;
the electric power steering electronic control unit 4 receives the vehicle speed signal sent by the data communication bus 2, and can selectively remove the locking state of the electric power steering motor 5 according to the vehicle speed signal to recover the steering of the steering wheel 7.
Further, the electric power steering electronic control unit 4 compares the vehicle speed corresponding to the vehicle speed signal with a preset threshold, and if the vehicle speed is lower than the preset threshold, performs a step of releasing the lock state of the electric power steering motor 5, and restores the turning function of the steering wheel 7. If the steering wheel is higher than the preset threshold value, the steering wheel 7 is kept in the steering lock state.
The embodiment also provides an automobile which comprises the control system for preventing the steering wheel from rotating during the automobile collision and the control method for preventing the steering wheel from rotating during the automobile collision. The automobile has the control system and the control method for preventing the steering wheel from rotating during automobile collision, so that the phenomenon that the steering wheel rotates along with the deflection of wheels during automobile collision can be avoided, and the protection effect of the safety airbag is improved. And no additional part is added, the function integration is carried out only by utilizing the existing vehicle body system, and the control method is simple and easy to implement.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A control system for preventing rotation of a steering wheel during a collision of a vehicle, comprising:
a safety system electronic control unit (1) configured to be able to acquire a processed collision signal and to send a safety system ignition command;
a data communication bus (2) electrically connected to the safety system electronic control unit (1), the data communication bus (2) being configured to be able to receive the safety system ignition command;
the vehicle speed detection unit (3) is electrically connected with the data communication bus (2), and the vehicle speed detection unit (3) is used for acquiring vehicle speed information of wheels (8) and sending the vehicle speed information to the data communication bus (2);
an electric power steering system electrically connected to the safety system electronic control unit (1) and the data communication bus (2), and configured to be able to receive the safety system ignition command and to lock the steering of a steering wheel (7) according to the safety system ignition command; the electric power steering system is also configured to be capable of receiving a vehicle speed signal of the data communication bus (2) and releasing a steering lock state of the steering wheel (7) according to the vehicle speed signal.
2. The control system according to claim 1, wherein the safety system electronic control unit (1) includes an airbag controller, and a detector and an actuator electrically connected to the airbag controller, the airbag controller being installed at a front or middle portion of a vehicle tunnel, the detector being configured to acquire the collision signal, and the airbag controller being configured to receive the collision signal and send an execution signal to the actuator.
3. The control system of claim 2, wherein the detector comprises a crash sensor and the actuator comprises an air bag ignition device and a seat belt tensioning device.
4. The control system of claim 3, wherein the impact sensors include a center impact sensor disposed at a front of the vehicle, a left front impact sensor disposed at a left side of the vehicle, and a right front impact sensor disposed at a right side of the vehicle.
5. The control system according to claim 1, wherein the electric power steering system comprises an electric power steering electronic control unit (4) and an electric power steering motor (5) electrically connected therewith, the electric power steering electronic control unit (4) is electrically connected with the safety system electronic control unit (1) and the data communication bus (2), the electric power steering motor (5) is in transmission connection with the steering wheel (7), and the electric power steering electronic control unit (4) is configured to control the electric power steering motor (5) to be locked according to the safety system ignition instruction so as to lock the steering of the steering wheel (7); the electric power steering electronic control unit (4) is further configured to be able to release the lock-up state of the electric power steering motor (5) in accordance with the vehicle speed signal to resume rotation of the steering wheel (7).
6. The control system according to claim 5, characterized in that the electric power steering system further comprises a steering mechanism (6) in driving connection with the electric power steering motor (5), one end of the steering mechanism (6) being connected with the steering wheel (7) and the other end being connected with the wheels (8).
7. A control system according to claim 1, characterised in that the vehicle speed detection unit (3) comprises a vehicle speed sensor electrically connected to the data communication bus (2), the vehicle speed sensor being mounted in a transaxle case or transmission case.
8. A control method for preventing rotation of a steering wheel in a car collision, which employs the control system for preventing rotation of a steering wheel in a car collision according to any one of claims 1 to 7, comprising the steps of:
when an automobile collides, a safety airbag controller of the safety system electronic control unit (1) sends a safety system ignition instruction to the data communication bus (2) and an electric power steering electronic control unit (4) of the electric power steering system at the same time;
after receiving the ignition instruction of the safety system, the electric power steering electronic control unit (4) controls a steering mechanism (6) of the electric power steering system to be locked by controlling an electric power steering motor (5) of the electric power steering system to be locked, and the steering mechanism (6) locks the steering of a steering wheel (7);
the electric power-assisted steering electronic control unit (4) receives a vehicle speed signal sent by the data communication bus (2), selectively releases the locking state of the electric power-assisted steering motor (5) according to the vehicle speed signal, and restores the steering of the steering wheel (7).
9. The control method according to claim 8, wherein the electric power steering electronic control unit (4) compares a vehicle speed corresponding to the vehicle speed signal with a preset threshold value, and performs the step of releasing the lock-up state of the electric power steering motor (5) if the vehicle speed is lower than the preset threshold value.
10. An automobile characterized by applying the control method for preventing the steering wheel from turning at the time of collision of the automobile according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910717446.9A CN110816643A (en) | 2019-08-05 | 2019-08-05 | Control system and control method for preventing steering wheel from rotating during automobile collision and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910717446.9A CN110816643A (en) | 2019-08-05 | 2019-08-05 | Control system and control method for preventing steering wheel from rotating during automobile collision and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN110816643A true CN110816643A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910717446.9A Pending CN110816643A (en) | 2019-08-05 | 2019-08-05 | Control system and control method for preventing steering wheel from rotating during automobile collision and automobile |
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