CN113911209A - Steering protection device and method, steering control system and vehicle - Google Patents
Steering protection device and method, steering control system and vehicle Download PDFInfo
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- CN113911209A CN113911209A CN202111137267.1A CN202111137267A CN113911209A CN 113911209 A CN113911209 A CN 113911209A CN 202111137267 A CN202111137267 A CN 202111137267A CN 113911209 A CN113911209 A CN 113911209A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D7/00—Steering linkage; Stub axles or their mountings
- B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system
- B62D7/226—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system acting on the steering gear
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Abstract
The invention discloses a steering protection device, a steering protection method, a steering control system and a vehicle, wherein the steering protection device comprises: the displacement sensor is arranged on the steering shaft rack; the moment sensor is used for monitoring stress information of a front wheel of the vehicle; the buffer units are respectively arranged on a transmission path between a front wheel of the vehicle and the steering shaft rack, connected with the power steering machine and used for controlling the connection state of the front wheel of the vehicle and the steering shaft rack; and the electronic control unit is used for determining whether the degree of the front wheels of the vehicle impacted meets a preset abnormal condition or not according to the stress information, the displacement change information and the torque information acquired by the torque sensor, and if so, sending a control signal to the power-assisted steering machine so that the power-assisted steering machine controls the buffer unit to be disconnected from the connection between the steering shaft rack and the front wheels. The protection device is beneficial to protecting the steering system component of the vehicle and improving the driving safety.
Description
Technical Field
The invention relates to the technical field of automatic control of vehicles, in particular to a steering protection device, a steering protection method, a steering control system and a vehicle.
Background
The steering wheel is usually hit by hands during the use of the automobile, for example, when the automobile suddenly encounters a bumpy road or a pit, the driver takes off the hands due to strong reverse acting force, the control on the steering wheel is lost, traffic accidents are caused, parts of a steering system are damaged if the situation is light, and people are damaged if the situation is heavy.
Disclosure of Invention
The embodiment of the application provides a steering protection device, a steering protection method, a steering control system and a vehicle, the protection device can effectively avoid damaging the steering system component of the automobile due to the reaction force caused by collision by disconnecting the rack of the steering shaft and the wheels when the wheels of the vehicle are impacted, so that a driver can lose control over a steering wheel, the steering system component of the vehicle can be protected, and the driving safety is improved.
In a first aspect, the present invention provides the following technical solutions through an embodiment of the present invention:
a steering protection device is applied to a steering control system, and the steering control system comprises: power steering, a steering shaft rack that meshes with a steering shaft, and a torque sensor that is mounted on the steering shaft, the steering protection device includes:
the displacement sensor is arranged on the steering shaft rack and used for detecting displacement change information of the steering shaft rack; the moment sensor is used for monitoring stress information of a front wheel of the vehicle; the buffer units are respectively arranged on a transmission path between the front wheel of the vehicle and the steering shaft rack, connected with the power steering machine and used for controlling the connection state of the front wheel of the vehicle and the steering shaft rack; and the electronic control unit is respectively connected with the torque sensor, the displacement sensor, the power-assisted steering machine and the torque sensor and is used for determining whether the degree of impact on the front wheels of the vehicle meets a preset abnormal condition or not according to the stress information, the displacement change information and the torque information acquired by the torque sensor, and if so, sending a control signal to the power-assisted steering machine so that the power-assisted steering machine controls the buffer unit to separate the connection between the steering shaft rack and the front wheels.
Preferably, the number of the buffer units is two, the two buffer units are respectively a first buffer unit and a second buffer unit, and the steering protection device further comprises a first moment rack and a second moment rack; the first buffer unit is connected with a first front wheel through the first torque rack and is used for controlling the connection state of the first front wheel and the first end of the steering shaft rack; the second buffer unit is connected with a second front wheel through the second moment rack and used for controlling the connection state of the second front wheel and the second end of the steering shaft rack.
Preferably, the first buffer unit and the second buffer unit each include: the power-assisted steering gear comprises a connecting shaft gear and a moving part, wherein the connecting shaft gear is connected with the moving part, the moving part is connected with the power-assisted steering gear, and a steering shaft rack is connected with a corresponding torque rack through the connecting shaft gear; the moving component is used for disconnecting the connecting shaft gear from the steering shaft rack when a disconnection signal sent by the power steering engine is received.
Preferably, the moving part is an electric telescopic mechanism, and when the disconnection signal is received, the electric telescopic mechanism pushes the connecting shaft gear, so that the steering shaft rack is disconnected from the connecting shaft gear.
Preferably, the torque sensor comprises a first torque sensor mounted on the first torque rack and a second torque sensor mounted on the second torque rack.
In a second aspect, the present invention provides the following technical solutions through an embodiment of the present invention:
a steering protection method applied to the steering protection device of any one of the preceding first aspects, the method comprising:
monitoring stress information detected by a torque sensor, displacement change information detected by a displacement sensor and torque information acquired by a torque sensor; and determining whether the degree of the front wheels of the vehicle impacted meets a preset abnormal condition or not based on the stress information, the displacement change information and the torque information, and if so, sending a control signal to a power-assisted steering machine to enable a control buffer unit of the power-assisted steering machine to be disconnected from a steering shaft rack and the front wheels.
Preferably, the determining whether the degree of impact of the front wheel of the vehicle meets a preset abnormal condition based on the force-receiving information, the displacement change information and the torque information includes: determining whether the stress value is greater than a preset first stress threshold value or not based on the stress information; judging whether the stress information is larger than a preset first stress threshold value or not; if so, monitoring whether the torque value in the torque information exceeds a preset torque threshold value and/or monitoring whether the displacement change value in the displacement change information exceeds a preset displacement change range, and if so, determining that the degree of collision of the front wheels of the vehicle meets the preset abnormal condition.
Preferably, the method further comprises the following steps: if the stress value is smaller than a preset second stress threshold value, monitoring whether a displacement change value in the displacement change information exceeds a preset displacement change range; and if so, sending a recovery control signal to the power-assisted steering machine, so that the power-assisted steering machine controls the buffer unit to recover the connection between the steering shaft rack and the front wheel.
In a third aspect, the present invention provides the following technical solutions through an embodiment of the present invention:
a steering control system comprising a steering wheel, a power steering gear, a steering shaft rack, a torque sensor, and the steering protection device of any one of the preceding first aspects, wherein the steering shaft rack is engaged with the steering shaft, and the torque sensor is mounted on the steering shaft.
In a fourth aspect, the present invention provides the following technical solutions according to an embodiment of the present invention:
a vehicle comprising a vehicle body and the steering control system as described in the foregoing third aspect mounted in the vehicle body.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the embodiment of the invention provides a steering protection device, a steering protection method, a steering control system and a vehicle, wherein the protection device comprises: the device comprises a torque sensor for monitoring stress information of a front wheel of a vehicle, a displacement sensor arranged on a steering shaft rack, and a buffer unit arranged on a transmission path between the front wheel of the vehicle and the steering shaft rack, wherein the buffer unit is connected with a power-assisted steering machine and used for controlling the connection state of the front wheel of the vehicle and the steering shaft rack. The electronic control unit is connected with the torque sensor, the displacement sensor, the power steering gear and each torque sensor and used for determining whether the degree of impact of the front wheels of the vehicle meets preset abnormal conditions or not according to the stress information, the displacement change information and the torque information collected by the torque sensors, if so, a control signal is sent to the power steering gear, so that the power steering gear control buffer unit is disconnected from the connection between the steering shaft rack and the front wheels, and the steering wheel is far away from external force impact. The protection device effectively avoids the damage to the steering system component of the automobile due to the reaction force caused by collision when the wheels of the automobile are impacted by disconnecting the rack of the steering shaft from the front wheel, thereby leading the driver to lose the control on the steering wheel, being beneficial to protecting the steering system component of the automobile and improving the driving safety.
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 are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a steering protection device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a complete structure of a steering protection device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a buffer unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another buffer unit according to an embodiment of the present invention;
FIG. 5 is a flow chart of a steering protection method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
The embodiment of the application provides a steering protection device, a steering protection method, a steering control system and a vehicle, wherein the protection device can effectively avoid that a reaction force caused by collision damages a steering system component of the automobile when a vehicle wheel is impacted, so that a driver loses control over a steering wheel, the steering system component of the vehicle is protected, and the driving safety is improved.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a steering protection device is applied to a steering control system, and the steering control system further comprises: power assisted steering machine, with the steering spindle rack of steering spindle meshing and install the torque sensor on the steering spindle, turn to protection device and include: the displacement sensor is arranged on the steering shaft rack and used for detecting the displacement change information of the steering shaft rack; the moment sensor is used for monitoring stress information of a front wheel of the vehicle; the buffer units are respectively arranged on a transmission path between a front wheel of the vehicle and a steering shaft rack, connected with the power steering machine and used for controlling the connection state of the front wheel of the vehicle and the steering shaft rack; and the electronic control unit is respectively connected with the torque sensor, the displacement sensor, the power steering gear and the torque sensor and is used for determining whether the degree of impact of the front wheels of the vehicle meets a preset abnormal condition or not according to the stress information, the displacement change information and the torque information acquired by the torque sensor, and if so, sending a control signal to the power steering gear so that the power steering gear control buffer unit is disconnected from the connection between the steering shaft rack and the front wheels.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
In a first aspect, a steering protection device provided in an embodiment of the present invention is applied to a steering control system, and as shown in fig. 1, the steering control system further includes: a power steering gear 201, a steering shaft rack 203 engaged with a steering shaft 202, and a torque sensor 205 mounted on the steering shaft.
Specifically, the steering protection device includes: a displacement sensor 101 mounted on the steering shaft rack 203 for detecting displacement change information of the steering shaft rack 203; the moment sensor 102 is used for monitoring stress information of a front wheel of the vehicle; and the buffer units 103 are respectively arranged on a transmission path between the front wheels of the vehicle and the steering shaft rack 203, are connected with the power steering unit 201, and are used for controlling the connection state of the front wheels of the vehicle and the steering shaft rack 203. In fig. 1, rectangular objects on both sides represent the front wheels of the vehicle.
Specifically, the power steering unit 201 may be an electro-hydraulic power steering unit, an electric power steering unit, or the like. In addition, the steering shaft 202 is engaged with a steering shaft rack 203 via a steering shaft gear 204.
An Electronic Control Unit (ECU) 104 is connected to the torque sensor 205, the displacement sensor 101, the power steering Unit 201, and each torque sensor 102, respectively, and is configured to determine whether the degree of impact on the front wheel of the vehicle meets a preset abnormal condition according to the force information, the displacement change information, and the torque information collected by the torque sensor, and if so, send a Control signal to the power steering Unit 201, so that the power steering Unit 201 controls the buffer Unit 103 to disconnect the steering shaft rack 203 from the front wheel, so that the steering wheel is away from the external force impact. Specifically, after the connecting shaft gear is separated from the steering shaft rack, the steering shaft avoids the reverse force caused by the impact force on the wheels, and the impact of the external force is fully relieved.
It should be noted that the steering control system further includes: a steering angle sensor 206, which may be mounted on the steering shaft, is connected to the ECU. The control flow of the steering control system can be simply described as follows: when a signal that a driver operates a steering wheel is received, the ECU determines a target current of the power steering machine according to the monitored vehicle speed signal, the monitored rotation angle, the monitored rotation direction, the monitored torque signal and the monitored torque signal, and sends an instruction to the power steering machine, so that the power steering machine outputs a steering power-assisted torque with a corresponding size and direction, and power is assisted.
In a specific embodiment, determining whether the degree of impact of the front wheel of the vehicle meets a preset abnormal condition based on the force information, the displacement change information and the torque information may specifically include: determining whether the stress value is greater than a preset first stress threshold value or not based on the stress information; and if so, monitoring whether the torque value in the torque information exceeds a preset torque threshold value and/or monitoring whether the torque change value in the displacement change information exceeds a preset displacement change range, and if so, determining that the degree of collision of the front wheels of the vehicle meets a preset abnormal condition.
The preset first force threshold may be obtained based on a test: the vehicle is provided with a torque sensor, the torque sensor is used for detecting stress information of a front wheel, so that the vehicle runs on a bumpy or hollow road, and when a steering wheel of the vehicle is subjected to a 'thrashing' phenomenon due to reaction force or a driver feels that the steering wheel is not controlled, the stress information detected by the torque sensor is used as a stress detection value. In order to obtain accurate test data, multiple tests are required to obtain an arithmetic stress average value, and the arithmetic stress average value is used as a preset first stress threshold value. For example, the preset first stress threshold may be set to 80-100N/m.
Of course, in order to make the steering protection device more sensitive and fully ensure driving safety, the actually set preset stress threshold may be slightly smaller than the preset stress threshold obtained in the test.
Specifically, when the automobile is in large bump, the steering tie rod drives the steering shaft to rotate when being subjected to displacement caused by external force, and the torque sensor detects the reverse force and sends a detected reverse force signal to the ECU. The torque sensor detects a reverse force generated by the steering shaft and sends a detected reverse force signal to the ECU. The displacement sensor detects the displacement change information of the steering shaft rack and sends the detected displacement change information to the ECU. And the ECU receives the stress information sent by the torque sensor, the torque information sent by the torque sensor and the displacement change information sent by the displacement sensor to make judgment.
Specifically, when the torque detected by the torque sensor is greater than the preset torque threshold, for example, when the torque is greater than 100-: when the displacement change information of more than 10 teeth, where 10 teeth denotes 10 teeth of the steering shaft rack, is generated within one second. The ECU sends a control signal to the power-assisted steering machine, and the power-assisted steering machine controls the buffer unit to start working: the control buffer unit is disconnected from the connection between the steering shaft rack and the front wheel.
In a specific embodiment, determining whether the degree of impact of the front wheels of the vehicle meets a preset abnormal condition based on the force information, the displacement change information and the torque information further includes: if the stress value is smaller than a preset second stress threshold value, monitoring whether the displacement change value in the displacement change information exceeds a preset displacement change range; and if so, sending a recovery control signal to the power-assisted steering machine, so that the power-assisted steering machine control buffer unit recovers the connection between the steering shaft rack and the front wheel.
Specifically, when the stress value detected by the torque sensor is reduced to a preset second stress threshold value, the ECU monitors the displacement change value of the steering shaft rack detected by the displacement sensor in real time, if the displacement change value does not exceed the preset displacement change range, the ECU sends a control signal to the power steering gear, the power steering gear sends a pop-up signal to the electric telescopic mechanism, the electric telescopic mechanism contracts, the connection between the steering shaft rack and the front wheel is recovered, and a driver takes over the steering wheel again.
Here, the preset second stress threshold may also be obtained based on a test. For example, the preset second force threshold may be 20-40N/m.
Of course, the displacement sensor here detects the displacement change value of the steering shaft rack, and may be understood as detecting the relative positional relationship between the steering shaft rack and the axial shaft gear.
Preferably, as shown in fig. 2, the number of the steering protection devices is two, and the steering protection devices are respectively a first buffer unit and a second buffer unit, and the steering protection device further includes a first moment rack 104 and a second moment rack 105; the first buffer unit is connected with the first front wheel through the first torque rack 104 and is used for controlling the connection state of the first front wheel and the first end of the steering shaft rack 202; the second damping unit is connected to the second front wheel via the second torque rack 105, and is configured to control a connection state of the second front wheel to the second end of the steering shaft rack 202. Here, the first front wheel may be a left front wheel, and the second front wheel may be a right front wheel.
Of course, as another alternative embodiment, the steering protection device may be provided with only one buffer unit, the buffer unit may be provided at the first end of the connecting shaft gear for controlling the connection state of the first front wheel and the first end of the connecting shaft gear, or the buffer unit may be provided at the second end of the connecting shaft gear for controlling the connection state of the second front wheel and the first end of the connecting shaft gear. Therefore, the damage to the steering control component caused by the reverse force generated by the front wheel on a specific side of the vehicle can be avoided.
Specifically, the first end of the steering shaft rack 203 may be coupled to the first moment rack 104 in an up-down staggered manner in a first buffer unit capable of controlling the coupling of the first front wheel to the first end of the steering shaft rack 203. The second end of the steering shaft rack 203 and the second moment rack 105 are connected to a second buffer unit in a vertically staggered manner, and the second buffer unit can control the connection of the second front wheel and the second end of the steering shaft rack 203.
As an alternative embodiment, as shown in fig. 3, each of the first buffer unit and the second buffer unit may include: a connecting shaft gear 1031 and a moving part 1032, the connecting shaft gear 1031 is connected with the moving part 1032, the moving part 1032 is connected with the power steering gear 201, and the connecting shaft gear 1031 is respectively connected with one end of the steering shaft rack 202 and one end of the corresponding torque rack; the moving member 1032 is configured to disconnect the connecting shaft gear 1031 from the steering shaft rack 202 upon receiving a disconnection signal from the power steering gear 201.
In a specific embodiment, the moving member 1032 may include an electric retracting mechanism, and when receiving a disconnection signal from the power steering 201, the electric retracting mechanism pushes the connecting shaft gear so that the steering shaft rack is disconnected from the connecting shaft gear.
Specifically, as shown in fig. 3, the electric telescopic mechanism may be located above the connecting shaft gear and connected to the connecting shaft gear in a compression manner, and when the electric telescopic mechanism receives a disconnection signal sent by the power steering gear, the electric telescopic mechanism pushes the connecting shaft gear to the lower side of the vehicle body, so that the connecting shaft gear is disconnected from the steering shaft rack. Alternatively, the connecting shaft gear may still be engaged with the torque rack in the event that the connecting shaft gear is disengaged from the steering shaft rack. When the electric telescopic mechanism receives a connection signal sent by the power steering gear, the electric telescopic mechanism pulls back the connecting shaft gear, so that the connecting shaft gear is connected with the steering shaft rack again.
As another alternative, as shown in fig. 4, the moving part 1032 may include two electric telescoping mechanisms, namely a first electric telescoping mechanism 1032 and a second electric telescoping mechanism 1033, the first electric telescoping mechanism 1032 and the second electric telescoping mechanism 1033 are both connected to the connecting shaft gear 1031, and the power steering gear is connected to the first electric telescoping mechanism and the second electric telescoping mechanism respectively. The first electric telescopic mechanism is used for receiving a disconnection signal sent by the power-assisted steering machine, and the second electric telescopic mechanism is used for receiving a connection signal sent by the power-assisted steering machine.
Specifically, the first electric retracting mechanism 1032 may be located above the connecting shaft gear 1031 and be in compression connection with the connecting shaft gear, and the second electric retracting mechanism 1033 may be located below the connecting shaft gear 1031 and be in gear connection with the connecting shaft. When the first electric telescopic mechanism receives a disconnection signal sent by the power steering gear, the first electric telescopic mechanism pushes the connecting shaft gear to the lower part of the vehicle body, so that the connecting shaft gear is separated from the steering shaft rack, and the second electric telescopic mechanism is in compression connection with the connecting shaft gear. When the second electric telescopic mechanism receives a connection signal sent by the power-assisted steering machine, the second electric telescopic mechanism pushes the connecting shaft gear to the upper part of the vehicle body, so that the connecting shaft gear is reconnected with the steering shaft rack, and the first electric telescopic mechanism and the connecting shaft gear recover to be compressed and connected.
Of course, as another alternative embodiment, the first electric telescopic mechanism may be located at the right side of the connecting shaft gear and connected with the connecting shaft gear in a compression manner, and the second electric telescopic mechanism may be located at the left side of the connecting shaft gear and connected with the connecting shaft gear. When the first electric telescopic mechanism receives a disconnection signal sent by the power steering gear, the first electric telescopic mechanism pushes the connecting shaft gear to the direction of the second electric telescopic mechanism, so that the connecting shaft gear is separated from the steering shaft rack, and the second electric telescopic mechanism and the connecting shaft gear form compression connection. When the second electric telescopic mechanism receives a connection signal sent by the power-assisted steering machine, the second electric telescopic mechanism pushes the connecting shaft gear to the first electric telescopic mechanism, so that the connecting shaft gear is reconnected with the steering shaft rack, and the first electric telescopic mechanism and the connecting shaft gear recover to be compressed and connected.
Preferably, as shown in fig. 2, the steering protection device may include two torque sensors, a first torque sensor mounted on the first torque rack and a second torque sensor mounted on the second torque rack.
Of course, as another alternative, the first torque sensor may be mounted on the intermediate path from the first front wheel to the first torque rack, and the second torque sensor may be mounted on the intermediate path from the second front wheel to the second torque rack. For example, the first torque sensor is mounted inboard of the first front wheel and the second torque sensor is mounted inboard of the second front wheel.
In addition, in order to meet the actual measurement requirement, the steering protection device can also comprise three or more torque sensors, so that the detection result of the stress information is more accurate.
The embodiment of the invention provides a steering protection device, which is characterized in that a buffer unit is arranged on a path from a wheel to a steering shaft rack, a power-assisted steering machine is connected with the buffer unit, an ECU determines whether the degree of impact on the front wheel of the vehicle meets a preset abnormal condition or not according to received stress information and displacement change information, and if the degree of impact meets the preset abnormal condition, the ECU sends a control signal to the power-assisted steering machine so that the power-assisted steering machine controls an electric telescopic mechanism to disconnect a connecting shaft gear from the steering shaft rack. The device can be when guaranteeing driver's both hands safety, protect each part of a steering system, avoid the part to receive external force impact damage, accomplish the steering wheel and resume the operation rapidly, can not lead to long-time direction control that breaks away from. And the steering protection device can quickly and effectively correct the position of the steering wheel and the position of the power-assisted steering machine, thereby preventing the steering wheel from deviating to a certain extent.
In summary, according to the steering protection device provided by the embodiment of the invention, when the vehicle runs on a bumpy road, a large pothole road or a traffic accident and involves damage to both hands of a driver due to a steering system, the steering protection device controls the rack of the steering shaft to be disconnected from the front wheel, so that the situation that the steering system component of the vehicle is damaged by reaction force caused by the collision is avoided, the driver loses control over the steering wheel, the steering system component of the vehicle is protected, and the driving safety is improved.
In a second aspect, an embodiment of the present invention provides a steering protection method, specifically, as shown in fig. 5, the method includes the following steps S101 to S102.
Step S101, determining whether the stress value is larger than a preset first stress threshold value or not based on stress information;
and S102, if yes, monitoring whether a torque value in the torque information exceeds a preset torque threshold value and/or monitoring whether a displacement change value in the displacement change information exceeds a preset displacement change range, and if yes, determining that the degree of the front wheels of the vehicle impacted meets a preset abnormal condition.
In an optional embodiment, the determining whether the degree of impact of the front wheel of the vehicle meets a preset abnormal condition based on the force-bearing information, the displacement change information and the torque information includes:
judging whether the stress information is larger than a preset first stress threshold value or not; and if so, monitoring whether the torque information exceeds a preset torque threshold value and/or monitoring whether the displacement change information exceeds a preset displacement change range, and if so, determining that the collision degree of the front wheels of the vehicle meets a preset abnormal condition.
In an alternative embodiment, the steering protection further comprises:
if the stress value is smaller than a preset second stress threshold value, monitoring whether the displacement change value in the displacement change information exceeds a preset displacement change range; and if so, sending a recovery control signal to the power-assisted steering machine, so that the power-assisted steering machine control buffer unit recovers the connection between the steering shaft rack and the front wheel.
The embodiment of the present invention provides a steering protection method, which has the same implementation principle and the same technical effect as the embodiments of the apparatus of the first aspect, and for brief description, reference may be made to the corresponding contents in the foregoing embodiments of the apparatus where no mention is made in the apparatus embodiments.
In a third aspect, based on the same inventive concept, the present embodiment provides a steering control system 400, comprising a steering wheel, a power steering, a steering shaft rack, a torque sensor, and the steering protection device of any one of the first aspect, wherein the steering shaft rack is engaged with the steering shaft, and the torque sensor is mounted on the steering shaft.
The implementation principle and the technical effect of the steering control system provided by the embodiment of the present invention are the same as those of the embodiment of the apparatus of the first aspect, and for the sake of brief description, reference may be made to the corresponding content in the foregoing embodiment of the apparatus where no mention is made in part.
In a fourth aspect, based on the same inventive concept, the present embodiment provides a vehicle 500, as shown in fig. 6, including a vehicle body 501 and a steering control system 400 as described in the foregoing first aspect mounted in the vehicle body.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A steering protection device is characterized by being applied to a steering control system, and the steering control system further comprises: power steering, a steering shaft rack that meshes with a steering shaft, and a torque sensor that is mounted on the steering shaft, the steering protection device includes:
the displacement sensor is arranged on the steering shaft rack and used for detecting displacement change information of the steering shaft rack;
the moment sensor is used for monitoring stress information of a front wheel of the vehicle;
the buffer units are respectively arranged on a transmission path between the front wheel of the vehicle and the steering shaft rack, connected with the power steering machine and used for controlling the connection state of the front wheel of the vehicle and the steering shaft rack;
and the electronic control unit is respectively connected with the torque sensor, the displacement sensor, the power-assisted steering machine and the torque sensor and is used for determining whether the degree of impact on the front wheels of the vehicle meets a preset abnormal condition or not according to the stress information, the displacement change information and the torque information acquired by the torque sensor, and if so, sending a control signal to the power-assisted steering machine so that the power-assisted steering machine controls the buffer unit to separate the connection between the steering shaft rack and the front wheels.
2. The device of claim 1, wherein the number of the buffer units is two, and the buffer units are a first buffer unit and a second buffer unit, respectively, and the steering protection device further comprises a first moment rack and a second moment rack;
the first buffer unit is connected with a first front wheel through the first torque rack and is used for controlling the connection state of the first front wheel and the first end of the steering shaft rack;
the second buffer unit is connected with a second front wheel through the second moment rack and used for controlling the connection state of the second front wheel and the second end of the steering shaft rack.
3. The apparatus of claim 2, wherein the first buffer unit and the second buffer unit each comprise: the power-assisted steering gear comprises a connecting shaft gear and a moving part, wherein the connecting shaft gear is connected with the moving part, the moving part is connected with the power-assisted steering gear, and a steering shaft rack is connected with a corresponding torque rack through the connecting shaft gear;
the moving component is used for disconnecting the connecting shaft gear from the steering shaft rack when a disconnection signal sent by the power steering engine is received.
4. The apparatus of claim 3, wherein the moving member is an electric retracting mechanism that pushes the connecting shaft gear such that the steering shaft rack is disengaged from the connecting shaft gear when the disconnect signal is received.
5. The apparatus of claim 2, wherein the torque sensor comprises a first torque sensor mounted on the first torque rack and a second torque sensor mounted on the second torque rack.
6. A steering protection method characterized by being applied to the steering protection device according to any one of claims 1 to 5, the method comprising:
monitoring stress information detected by a torque sensor, displacement change information detected by a displacement sensor and torque information acquired by a torque sensor;
and determining whether the degree of the front wheels of the vehicle impacted meets a preset abnormal condition or not based on the stress information, the displacement change information and the torque information, and if so, sending a control signal to a power-assisted steering machine to enable a control buffer unit of the power-assisted steering machine to be disconnected from a steering shaft rack and the front wheels.
7. The method of claim 6, wherein the determining whether the degree of impact of the front wheels of the vehicle satisfies a preset abnormal condition based on the force-receiving information, the displacement change information, and the torque information includes:
determining whether the stress value is greater than a preset first stress threshold value or not based on the stress information;
if so, monitoring whether the torque value in the torque information exceeds a preset torque threshold value and/or monitoring whether the displacement change value in the displacement change information exceeds a preset displacement change range, and if so, determining that the degree of collision of the front wheels of the vehicle meets the preset abnormal condition.
8. The method of claim 7, further comprising:
if the stress value is smaller than a preset second stress threshold value, monitoring whether a displacement change value in the displacement change information exceeds a preset displacement change range;
and if so, sending a recovery control signal to the power-assisted steering machine, so that the power-assisted steering machine controls the buffer unit to recover the connection between the steering shaft rack and the front wheel.
9. A steering control system comprising a steering wheel, a power steering gear, a steering shaft rack, a torque sensor, and the steering protection device according to any one of claims 1 to 5, wherein the steering shaft rack is engaged with the steering shaft, and the torque sensor is mounted on the steering shaft.
10. A vehicle characterized by comprising a vehicle body and a steering control system as recited in claim 9 mounted in the vehicle body.
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| CN202111137267.1A CN113911209B (en) | 2021-09-27 | 2021-09-27 | Steering protection device and method, steering control system and vehicle |
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| JP2001063607A (en) * | 1999-08-27 | 2001-03-13 | Honda Motor Co Ltd | Rear-wheel steering device |
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| CN104108417A (en) * | 2013-04-18 | 2014-10-22 | 福特环球技术公司 | Steering System Clatter Mitigation |
| CN104512458A (en) * | 2013-09-30 | 2015-04-15 | 福特全球技术公司 | Semi-decoupled steering system |
| CN112660236A (en) * | 2020-12-29 | 2021-04-16 | 东风汽车集团有限公司 | Vehicle steering control method and device and vehicle steering system |
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2021
- 2021-09-27 CN CN202111137267.1A patent/CN113911209B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001063607A (en) * | 1999-08-27 | 2001-03-13 | Honda Motor Co Ltd | Rear-wheel steering device |
| KR20040019556A (en) * | 2002-08-28 | 2004-03-06 | 현대자동차주식회사 | a hydraulic steering system with a control valve and cylinder |
| CN104108417A (en) * | 2013-04-18 | 2014-10-22 | 福特环球技术公司 | Steering System Clatter Mitigation |
| CN104512458A (en) * | 2013-09-30 | 2015-04-15 | 福特全球技术公司 | Semi-decoupled steering system |
| CN112660236A (en) * | 2020-12-29 | 2021-04-16 | 东风汽车集团有限公司 | Vehicle steering control method and device and vehicle steering system |
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| CN113911209B (en) | 2022-12-20 |
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