CN115534913A - Method for controlling parking of vehicle, electronic parking brake, parking system and vehicle - Google Patents
Method for controlling parking of vehicle, electronic parking brake, parking system and vehicle Download PDFInfo
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- CN115534913A CN115534913A CN202110740188.3A CN202110740188A CN115534913A CN 115534913 A CN115534913 A CN 115534913A CN 202110740188 A CN202110740188 A CN 202110740188A CN 115534913 A CN115534913 A CN 115534913A
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- 238000004364 calculation method Methods 0.000 description 14
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a method for controlling parking of a vehicle, an electronic parking brake, a vehicle parking system and the vehicle. Wherein, the method for controlling the parking of the vehicle is used for an electronic parking brake, the method comprises: receiving a parking signal; acquiring a brake pipeline pressure value; obtaining parking braking force according to the pressure value of the brake pipeline; and controlling the parking motor to brake the wheels according to the parking braking force. The method for controlling the parking of the vehicle does not need to be provided with a ramp sensor, and has the advantages of simple required hardware structure, lower cost, easiness in implementation and wide application range.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a method for controlling parking of a vehicle, an electronic parking brake, a vehicle parking system and the vehicle.
Background
In the actual driving process, after the vehicle is braked, the parking function of the vehicle needs to be started to prevent the vehicle from sliding, and in the parking process, the parking braking force is generally calculated by a gradient sensor to realize the parking of the vehicle.
In the system, a vehicle controller acquires various acquisition signals through an accelerator pedal signal acquisition device, a brake pedal signal acquisition device and a gear shift handle signal acquisition device and performs information interaction with a motor controller, and is further provided with a direct-current power supply, a power unit, a current detection device and a motor rotating speed detection device, and the motor controller controls the motor to operate according to vehicle information, motor rotating speed information, current information and the like, so that the vehicle is parked on the ramp.
In the above scheme, although not setting up the ramp sensor, but set up multiple signal pickup assembly, the hardware structure is comparatively complicated, and mainly is applicable to electric automobile, and application scope is little.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, one of the objectives of the present invention is to provide a method for controlling parking of a vehicle, which does not require a ramp sensor, and has the advantages of simple hardware structure, low cost, easy implementation, and wide application range.
The second objective of the present invention is to provide an electronic parking brake.
The invention also aims to provide a vehicle parking system.
The fourth purpose of the invention is to provide a vehicle.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for controlling parking of a vehicle, for an electronic parking brake, the method including: receiving a parking signal; acquiring a brake pipeline pressure value; obtaining parking braking force according to the pressure value of the brake pipeline; and controlling a parking motor to brake the wheels according to the parking braking force.
According to the method for controlling the parking of the vehicle, when a parking requirement exists, a parking signal is received, a brake pipeline pressure value is obtained, a parking braking force is obtained according to the brake pipeline pressure value, and a parking motor is controlled to brake wheels according to the parking braking force, so that a parking function is achieved. The parking braking force can be directly obtained according to the pressure value of the brake pipeline without calculating the parking braking force through a ramp sensor, the cost is low, the implementation is easy, and the application range is wide.
In some embodiments of the present invention, deriving a parking brake force from the brake line pressure value comprises: if the brake pipeline pressure value is larger than zero, the parking braking force is obtained through calculation according to the brake pipeline pressure value and the size of a wheel brake; or, if the pressure value of the brake pipeline is equal to zero, determining that the parking brake force is a first preset brake force value.
In some embodiments of the invention, the method further comprises: acquiring a wheel speed value; and if the pressure value of the brake pipeline is greater than zero and the wheel speed value is greater than zero, controlling the parking motor according to a first preset brake force value.
In some embodiments of the invention, the method further comprises: after the parking motor is controlled according to the first preset braking force value, if the wheel speed value is determined to be still larger than zero, the parking motor is controlled according to a second preset braking force value, wherein the second preset braking force value is larger than the first preset braking force value.
In some embodiments of the invention, the first preset power value corresponds to a 20% grade braking power value and the second preset braking power value is a maximum allowable parking power value of an electronic parking system of the vehicle.
In some embodiments of the present invention, the obtaining the brake line pressure value includes: acquiring a brake pipeline pressure value when the wheel speed value is zero; or acquiring the average brake pipeline pressure value in the time period from the beginning of the braking action to the disappearance of the braking action.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides an electronic parking brake, including: the receiving module is used for receiving a parking signal; the pressure acquisition module is used for acquiring a pressure value of a brake pipeline; the braking force obtaining module is used for obtaining parking braking force according to the braking pipeline pressure value; and the control module is used for controlling the parking motor to brake the wheels according to the parking braking force.
According to the electronic parking brake provided by the embodiment of the invention, after the receiving module receives a parking signal, the pressure obtaining module obtains the pressure of a brake pipeline, the value braking force obtaining module obtains the parking braking force according to the pressure value of the brake pipeline, and the control module controls the parking motor to brake the wheel according to the parking braking force. Based on the receiving module, the pressure obtaining module, the braking force obtaining module, the control module and other structures, the parking signal can be quickly responded to the execution signal receiving processing, the parameter calculation and other work, so that the parking function of the vehicle is realized, a ramp sensor is not required to be arranged, the cost is low, and the implementation is easy.
In order to achieve the above object, a vehicle parking system according to an embodiment of a third aspect of the present invention includes: a parking switch for outputting a parking signal according to a parking operation; the parking motor is connected with a brake of a vehicle and used for driving the brake to perform braking action; and the electronic parking controller is connected with the parking switch and the parking motor and is used for controlling the parking motor according to the method for controlling the parking of the vehicle in any embodiment.
According to the vehicle parking system provided by the embodiment of the invention, after the electronic parking controller receives the parking signal output by the parking switch, the electronic parking controller calculates the parking braking force and controls the parking motor to act according to the parking braking force, and the parking motor drives the brake to act, so that the parking function is realized. According to the vehicle parking system, under different parking working conditions of a vehicle, when a user operates a parking switch, the whole system can respond in time, signals are directly read and the parking braking force is obtained through the electronic parking controller through calculation and the parking motor is controlled to act, a ramp sensor is not needed, the structure is simple, the cost is low, the implementation is easy, and the application range is wide.
In some embodiments of the present invention, the vehicle parking system further comprises: and the wheel speed sensor is connected with the electronic parking controller and used for detecting a wheel speed value.
In order to achieve the above object, a fourth aspect of the present invention provides a vehicle, comprising: the auxiliary power-assisted system is connected with the brake pedal, the vehicle electronic stabilizing system is connected with the auxiliary power-assisted system, the vehicle electronic stabilizing system is connected with the brake through a brake pipeline, and the vehicle electronic stabilizing system is used for detecting the pressure value of the brake pipeline; the vehicle parking system of the third aspect is connected with the vehicle electronic stability system.
According to the vehicle provided by the embodiment of the invention, when the driver controls the vehicle to decelerate, the vehicle electronic stability system detects and stores the brake pipeline pressure value of the brake pipeline. When a user controls the vehicle to park, the vehicle parking system reads a brake pipeline pressure value stored in the vehicle electronic stabilizing system and calculates according to the brake pipeline pressure value to obtain parking braking force, so that the vehicle is controlled to park. The parking system is arranged in the vehicle, the parking braking force is acquired by the parking system and the vehicle is controlled to park, a ramp sensor is not required, the structure is simple, the cost is low, the implementation is easy, and the application range is wide.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a method of controlling parking of a vehicle according to one embodiment of the present invention;
FIG. 2 is a flowchart of a method of controlling parking of a vehicle according to another embodiment of the present invention;
FIG. 3 is a flowchart of a method of controlling parking of a vehicle according to yet another embodiment of the present invention;
FIG. 4 is a flowchart of a method of controlling parking of a vehicle according to yet another embodiment of the present invention;
FIG. 5 is a block diagram of an electronic parking brake of one embodiment of the present invention;
FIG. 6 is a block diagram of a vehicle park system in accordance with an embodiment of the present invention;
FIG. 7 is a block diagram of a vehicle park system in accordance with another embodiment of the present invention;
FIG. 8 is a block diagram of a vehicle in accordance with one embodiment of the present invention;
FIG. 9 is a schematic illustration of a vehicle according to one embodiment of the present invention.
Reference numerals:
a vehicle 1;
an electronic parking brake 100;
the braking force control system comprises a receiving module 101, a pressure obtaining module 102, a braking force obtaining module 103 and a control module 104;
the system comprises a vehicle parking system 10, a brake pedal 20, an auxiliary power assisting system 30, a vehicle electronic stabilizing system 40 and a brake 50;
the parking device comprises a parking switch 11, a parking motor 12, an electronic parking controller 13 and a wheel speed sensor 14;
brake line L, front left wheel FL, front right wheel FR, rear left wheel RL, and rear right wheel RR.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
A method of controlling parking of a vehicle according to an embodiment of the present invention will be described with reference to fig. 1 to 4. It should be noted that the step numbers such as S1, S2, S3, and S4 in the present application are only for convenience of describing the present solution, and are not to be construed as limiting the order of the steps. That is, the execution order of, for example, steps S1, S2, S3, S4, etc. may be specifically determined according to actual requirements, and is not limited to the control in the order of steps in the following embodiments.
In some embodiments of the present invention, as shown in fig. 1, a flowchart of a method of controlling parking of a vehicle, wherein the method of controlling parking of the vehicle is used for an electronic parking brake, according to an embodiment of the present invention, comprises steps S1-S4, as follows.
And S1, receiving a parking signal.
In an embodiment, when a user has a parking requirement, a parking signal may be sent by operating a parking switch or the like, wherein the parking switch may include a hand brake lever or an electronic parking button or the like. Alternatively, in a vehicle with a hill hold function, the system may automatically send a parking signal to provide a short-time brake when the user starts the vehicle on a hill while driving the vehicle up a hill.
And S2, acquiring a brake pipeline pressure value.
Specifically, obtaining the brake line pressure value may include obtaining the brake line pressure value when the wheel speed value is zero, or obtaining an average brake line pressure value in a period from the start of the braking action to the disappearance of the braking action. The vehicle electronic stability system detects and stores a brake pipe pressure value of a brake pipe.
For example, the vehicle electronic stability system may store a brake line pressure value in the entire driving process from the current vehicle power-on to the vehicle power-off, or may store a brake line pressure value within a fixed distance of the current driving of the vehicle, or the driver may step on the brake pedal to control the vehicle to move from a stationary state, may preset the occurrence frequency of the process, and may store the brake line pressure value within the corresponding frequency, and the like.
And S3, obtaining parking braking force according to the pressure value of the brake pipeline.
In an embodiment, an electronic parking controller may be provided, the electronic parking controller obtains a brake pipeline pressure value from a vehicle electronic stabilization system, and obtains a parking braking force according to the brake pipeline pressure value, specifically, parameters such as a calculation method of the parking braking force and a size of a wheel brake may be stored in the electronic parking controller, a program may be further stored in the electronic parking controller, and the program may execute the calculation method of the parking braking force when running, so as to obtain a corresponding parking braking force according to the brake pipeline pressure value.
And S4, controlling the parking motor to brake the wheels according to the parking braking force. After the parking braking force is obtained, the parking motor drives the parking mechanism to perform parking action according to the parking braking force, and the parking mechanism can perform torque output according to the parking braking force so as to brake wheels, so that the parking function is realized.
According to the method for controlling the parking of the vehicle, when a parking requirement exists in a user, a parking signal is received, a brake pipeline pressure value is obtained, the parking braking force is obtained according to the brake pipeline pressure value, and the parking motor is controlled to brake the wheel according to the parking braking force, so that the parking function is achieved. The parking braking force can be directly obtained according to the pressure value of the brake pipeline without calculating the parking braking force through a ramp sensor, the cost is low, the implementation is easy, and the application range is wide.
In some embodiments of the present invention, as shown in fig. 2, a flowchart of a method for controlling parking of a vehicle according to another embodiment of the present invention is shown, wherein the parking braking force is obtained according to a brake pipe pressure value, i.e. step S3 above may include step S31 or step S32, as follows.
And S31, if the pressure value of the brake pipeline is greater than zero, calculating according to the pressure value of the brake pipeline and the size of the wheel brake to obtain the parking braking force. The electronic parking controller can be pre-stored with a parking braking force calculation formula, and can calculate the obtained brake pipeline pressure value and the size parameter of the wheel brake according to a preset calculation formula to obtain the parking braking force.
And S32, if the pressure value of the brake pipeline is equal to zero, determining that the parking brake force is a first preset brake force value. Wherein the first preset power value corresponds to a 20% grade braking power value.
Specifically, the brake line pressure is equal to zero, indicating that the brake line pressure value has not been obtained. For example, the electronic parking controller may not be able to obtain the brake line pressure value from the vehicle electronic stability system due to a system failure. For another example, during the operation of the vehicle, the user does not step on the brake pedal, and the brake does not work due to factors such as resistance, and the pressure value of the brake pipe in the brake pipe may be zero. At the moment, the electronic parking controller can directly take the first preset brake force value as the parking brake force, namely, the electronic parking controller directly calculates the parking brake force according to the 20% gradient so as to control the parking motor to brake the wheels.
In some embodiments of the present invention, as shown in fig. 3, a flowchart of a method for controlling parking of a vehicle according to another embodiment of the present invention is provided, wherein the method for controlling parking of a vehicle further includes step S5 and step S6, which are described as follows.
And S5, acquiring a wheel speed value.
The electronic parking controller can read the wheel speed value detected by the wheel speed sensor and judge the running state of the vehicle according to the wheel speed value.
Specifically, in the process of parking the vehicle, after the vehicle is braked, the temperature of a brake is high, after the vehicle is parked for a period of time, a brake system is cooled, the temperature is reduced, and the situation that the parking force is insufficient after cooling may be caused. And if the acquired wheel speed value is equal to zero, determining that the vehicle is in a static state, and finishing parking.
And S6, controlling the parking motor according to the first preset braking force value if the pressure value of the brake pipeline is greater than zero and the wheel speed value is greater than zero.
In an embodiment, the pressure value of the brake pipeline is greater than zero, and after the electronic parking controller applies the parking braking force for the first time according to the pressure value of the brake pipeline, if the obtained wheel speed value is greater than zero, the parking of the vehicle is incomplete, phenomena such as vehicle sliding and the like may occur, a potential safety hazard exists, the parking braking force needs to be applied again for parking, at this time, the electronic parking controller can directly control the parking motor according to the first preset braking force value, namely, the electronic parking controller directly calculates the parking braking force according to a 20% gradient so as to control the parking motor to brake the wheels.
In some embodiments of the present invention, as shown in fig. 4, a flowchart of a method for controlling parking of a vehicle according to still another embodiment of the present invention is provided, wherein the method for controlling parking of a vehicle further includes a step S7 after controlling a parking motor according to a first preset braking force value, which is described as follows.
And S7, controlling the parking motor according to a second preset braking force value when the wheel speed value is still larger than zero, wherein the second preset braking force value is larger than the first preset braking force value. Wherein the second preset braking force value is a maximum allowable parking force value of an electronic parking system of the vehicle.
After the electronic parking controller controls the parking motor according to the first preset braking force value, the electronic parking controller reads the wheel speed value from the wheel speed sensor again to judge whether parking is complete, and if the read wheel speed value is equal to zero, the parking is determined to be completed. If the wheel speed value read at this time is greater than zero, it indicates that the vehicle is not parked completely, there is a potential safety hazard, and a larger parking braking force needs to be applied again for parking, and at this time, the electronic parking controller can control the parking motor according to the second preset braking force value, that is, the electronic parking controller 13 controls the vehicle to park according to the maximum allowable parking force value of the electronic parking system of the vehicle.
In the parking process, the electronic parking controller can judge the parking condition according to the wheel speed value by detecting the wheel speed value in real time, can also provide a secondary clamping function, can increase the parking force again according to the parking effect after applying the parking force, and avoids the potential safety hazard problem caused by the insufficient parking force.
In some embodiments of the present invention, as shown in fig. 5, it is a block diagram of an electronic parking brake according to an embodiment of the present invention, wherein the electronic parking brake 100 includes a receiving module 101, a pressure obtaining module 102, a braking force obtaining module 103, and a control module 104.
The receiving module 101 is configured to receive a parking signal, and when a user has a parking request, the parking signal may be transmitted to be received by the receiving module 101 by operating a parking switch or the like. The pressure obtaining module 102 is configured to obtain a brake line pressure value, for example, the pressure obtaining module 102 may include a pressure sensor and the like, and may directly detect the line pressure value, or the brake line includes a brake fluid, and may obtain parameters such as density of the brake fluid, and obtain the brake line pressure value according to a calculation formula of the liquid pressure and the pressure. The obtained brake line pressure value may be a brake line pressure value when the wheel speed value is zero, or an average brake line pressure value in a period from the start of the braking action to the disappearance of the braking action is obtained.
The braking force obtaining module 103 is configured to obtain a parking braking force according to the brake line pressure value, and specifically, the parking braking force may be obtained by calculation according to the brake line pressure value and the size of the wheel brake 50. The control module 104 is configured to control the parking motor to brake the wheel based on the parking brake force.
According to the electronic parking brake 100 of the embodiment of the invention, after the receiving module 101 receives the parking signal, the pressure obtaining module 102 obtains the brake pipe pressure, the value braking force obtaining module 103 obtains the parking braking force according to the brake pipe pressure value, and the control module 104 controls the parking motor to brake the wheel according to the parking braking force. Based on the architectures of the receiving module 101, the pressure obtaining module 102, the braking force obtaining module 103, the control module 104, and the like, the parking signal can be quickly responded to the execution of the signal receiving processing, the parameter calculation, and the like, so that the parking function of the vehicle is realized, a ramp sensor is not required, the cost is low, and the implementation is easy.
In some embodiments of the present invention, as shown in fig. 6, a block diagram of a vehicle parking system according to an embodiment of the present invention is shown, wherein the vehicle parking system 10 includes a parking switch 11, a parking motor 12, and an electronic parking controller 13.
The parking switch 11 is used for outputting a parking signal according to a parking operation, wherein the parking switch 11 may include a hand brake lever or an electronic parking button, etc., and the parking signal may be transmitted by operating the parking switch 11 when a user confirms that parking is required.
The parking motor 12 is connected with a brake 50 of the vehicle for driving the brake 50 to perform a braking action, wherein the parking motor 12 can be installed beside a wheel and can be in contact connection with the wheel, and the parking motor 12 can control the brake 50 to act according to a control signal, so as to brake the wheel or release the wheel. For example, the brake 50 may include a brake caliper, a brake disc, a brake pad, or a friction pad, etc., and the parking function is performed by increasing a braking frictional force between the brake 50 and the wheel to brake the wheel. The brake 50 may be disposed at a rear wheel of the vehicle to be connected to the rear wheel to implement rear wheel braking, or the brake 50 may be disposed at a wheel of the entire vehicle to be connected to a wheel of the entire vehicle to implement four-wheel braking.
The electronic parking controller 13 is connected to both the parking switch 11 and the parking motor 12, and is configured to control the parking motor 12 according to any one of the above embodiments. The electronic parking controller 13 may obtain a parking signal output by the parking switch 11, and when the electronic parking controller 13 receives the parking signal, further obtain a parking braking force, and control the parking motor 12 to operate according to the parking braking force, thereby implementing a parking function. The Electronic parking controller 13 may be a parking ECU (Electronic Control Unit), and the parking motor 12 and/or the Electronic parking controller 13 may also be integrated into a brake 50 (not shown in fig. 6) of the vehicle, and the Electronic parking controller 13 may implement functions such as reading and processing signals and sending Control signals or commands through software.
Specifically, in the parking process, a user may send a parking signal by operating the parking switch 11, and after receiving the parking signal, the electronic parking controller 13 may obtain a brake line pressure value and determine the brake line pressure value. For example, when the brake pipe pressure value is greater than zero, the parking braking force is obtained through calculation according to the brake pipe pressure value and the size of the wheel brake, or when the brake pipe pressure value is equal to zero, the parking braking force is directly calculated according to the 20% gradient. The electronic parking controller 13 sends a control signal to the parking motor 12 according to the obtained parking braking force, and the parking motor 12 responds to the control signal and drives the brake 50 to perform a braking action, thereby implementing a parking function.
According to the vehicle parking system 10 of the embodiment of the invention, after the electronic parking controller 13 receives the parking signal output by the parking switch 11, the electronic parking controller 13 calculates to obtain the parking braking force and controls the parking motor 12 to act according to the parking braking force, and the parking motor 12 drives the brake 50 to act, so that the parking function is realized. According to the vehicle parking system 10, under different parking working conditions of a vehicle, when a user operates the parking switch 11, the whole system 10 can respond in time, signals are directly read and the parking braking force is obtained through the electronic parking controller 13 and calculated and the parking motor 12 is controlled to act, a ramp sensor is not needed, the structure is simple, the cost is low, the implementation is easy, and the application range is wide.
In some embodiments of the present invention, as shown in fig. 7, a block diagram of a vehicle parking system according to another embodiment of the present invention is shown, wherein the vehicle parking system 10 further includes a wheel speed sensor 14, and the wheel speed sensor 14 is connected to the electronic parking controller 13 for detecting a wheel speed value.
The wheel speed sensors 14 may be disposed at the wheels to detect wheel speed values, for example, the wheel speed sensors 14 may be installed at four wheels, so as to detect the wheel speed values of the four wheels, and the electronic parking controller 13 may determine the operating state of the vehicle according to the detected four wheel speed values, for example, when the wheel speed sensors 14 detect that the wheel speed values are equal to zero, it is determined that the vehicle is stationary, or when the wheel speed sensors 14 detect that the wheel speed values are greater than zero, it is determined that the vehicle is in a moving state, and the electronic parking controller 13 may also directly obtain the parking braking force through calculation.
Specifically, in the process of parking the vehicle, after the electronic parking controller 13 obtains the parking braking force according to the pressure value of the brake pipeline and controls the vehicle to park according to the parking braking force, the electronic parking controller 13 reads the wheel speed value from the wheel speed sensor 14, and if the wheel speed value is determined to be equal to zero, it is determined that the parking is finished. If the wheel speed value is determined to be larger than zero, the electronic parking controller 13 controls the parking motor 12 to act according to the first preset braking force value, namely, the electronic parking controller 13 directly calculates the parking braking force according to the 20% gradient so as to control the vehicle to park. After controlling the parking motor 12 according to the first preset braking force value, the electronic parking controller 13 reads the wheel speed value from the wheel speed sensor 14 again, and determines that parking is completed if the wheel speed value is equal to zero. If the wheel speed value is still larger than zero, the parking motor 12 is controlled according to a second preset braking force value, that is, the electronic parking controller 13 controls the vehicle to park according to the maximum allowable parking force value of the electronic parking system of the vehicle.
In the parking process, through setting up the fast value of fast sensor 14 real-time detection wheel, the electronic parking controller 13 can judge the parking condition according to the fast value of wheel, and vehicle parking system 10 can provide the secondary and press from both sides tight function, and after exerting the parking power, can increase the parking power once more according to the parking effect, avoids appearing the potential safety hazard problem because of the not enough problem of parking power causes.
In some embodiments of the present invention, as shown in fig. 8, a block diagram of a vehicle according to an embodiment of the present invention is shown, wherein the vehicle 1 includes a brake pedal 20, an auxiliary boosting system 30, a vehicle electronic stabilizing system 40 and a brake 50, and the vehicle parking system 10 of the above third aspect embodiment.
The auxiliary power assisting system 30 is connected with the brake pedal 20, the vehicle electronic stabilizing system 40 is connected with the auxiliary power assisting system 30, the vehicle electronic stabilizing system 40 is connected with the brake 50 through the brake pipeline L, and the vehicle electronic stabilizing system 40 is used for detecting the brake pipeline pressure value of the brake pipeline L. The brake line pressure value may be a brake line pressure value when the wheel speed value is zero, or an average brake line pressure value in a period from the start of the braking action to the disappearance of the braking action.
Wherein, the vehicle electronic stability system 40 may store the detected brake line pressure value and may store the brake line pressure value within a fixed time period. For example, the vehicle electronic stability system 40 may store a brake pipe pressure value during a whole driving process from the power-on of the vehicle 1 to the power-off of the vehicle 1, or may store a brake pipe pressure value within a fixed distance of the current driving of the vehicle 1, or may further control the vehicle 1 to move from a stationary state by the driver stepping on the brake pedal 20, may preset the occurrence frequency of the process, and store the brake pipe pressure value within the corresponding frequency, and the like.
In an embodiment, the vehicle park system 10 reads a brake line pressure value from the vehicle electronic stability system 40.
The functions of the vehicle parking system 10, such as reading and processing signals and sending control signals or instructions, may be implemented by software. Partial structures in the vehicle parking system 10, such as the parking motor 12 and/or the electronic parking controller 13, may be integrated into the brake 50 of the vehicle, and when a parking operation is required, the vehicle parking system 10 may directly read a brake line pressure value from the vehicle electronic stability system 40.
Specifically, during the process of the vehicle 1 from normal driving to parking, the vehicle 1 has a deceleration braking process, when the driver steps on the brake pedal 20 to control the vehicle 1 to decelerate, the auxiliary power system 30 generates brake pressure and sends the brake pressure to the vehicle electronic stabilizing system 40, the vehicle electronic stabilizing system 40 transmits the brake pressure to the brake 50 through the brake pipeline L, and the brake 50 acts to decelerate the vehicle 1. Throughout the process, the vehicle electronic stability system 40 will detect and store the brake line pressure value of the brake line L. When the vehicle 1 decelerates to zero, and the user controls the vehicle 1 to park, the vehicle parking system 10 reads the brake line pressure value stored in the vehicle electronic stability system 40, and calculates the parking braking force according to the brake line pressure value and the size of the wheel brake 50 to control the vehicle 1 to park.
According to the vehicle 1 of the embodiment of the invention, when the driver controls the vehicle 1 to decelerate, the vehicle electronic stability system 40 detects the brake line pressure value of the brake line L and stores it. When a user controls the vehicle 1 to park, the vehicle parking system 10 reads a brake pipe pressure value stored in the vehicle electronic stability system 40, and calculates a parking braking force according to the brake pipe pressure value, so as to control the vehicle 1 to park. The vehicle parking system 10 is arranged in the vehicle 1, the vehicle parking system 10 acquires parking braking force and controls the vehicle to park, a ramp sensor is not required, the structure is simple, the cost is low, the implementation is easy, and the application range is wide.
In some embodiments of the present invention, as shown in FIG. 9, a schematic view of a vehicle according to one embodiment of the present invention is shown. Wherein FL represents the front left wheel, FR represents the front right wheel, RL represents the rear left wheel, RR represents the rear right wheel, and a wheel speed sensor 14 is disposed at each wheel for acquiring wheel speed values of the four wheels, and the four wheels are connected to the vehicle electronic stability system 40 through the brake pipe L. Taking a brake 50 connected to the left rear wheel RL as an example, the parking motor 12, the electronic parking controller 13, the wheel speed sensor 14, and the like may be integrated in the brake 50 (not shown in fig. 9). In the figure, the solid line represents the hardware pipeline connection, the dotted line represents the signal transmission direction, and the signal transmission process can be realized through software.
In the embodiment, when the vehicle 1 is controlled to decelerate and park, the driver depresses the brake pedal 20, the auxiliary power assisting system 30 generates brake pressure and transmits the brake pressure to the vehicle electronic stabilizing system 40, the vehicle electronic stabilizing system 40 transmits the brake pressure to the brake 50 through the brake pipeline L, and the brake 50 acts to decelerate the vehicle 1. Throughout the process, the vehicle electronic stability system 40 will detect and store the brake line pressure value of the brake line L. When the vehicle 1 decelerates to zero, the user operates the parking switch 11 to send a parking signal, and after the electronic parking controller 13 receives the parking signal, the electronic parking controller can read and judge a brake pipe pressure value from the vehicle electronic stabilizing system 40. For example, when the brake pipe pressure value is greater than zero, the parking brake force is obtained through calculation according to the brake pipe pressure value and the size of the wheel brake, or when the brake pipe pressure value is equal to zero, that is, the electronic parking controller 13 cannot obtain the brake pipe pressure value, the parking brake force is directly calculated according to the 20% gradient, and a control signal is sent to the parking motor 12, the parking motor 12 responds to the control signal and drives the brake 50 to perform a braking action, and the brake 50 performs torque output according to the parking brake force to brake the wheel, so that a parking function is achieved.
Meanwhile, the wheel speed sensor 14 detects a wheel speed value in real time, the electronic parking controller 13 obtains parking braking force according to the read brake pipeline pressure value, the electronic parking controller 13 reads the wheel speed value from the wheel speed sensor 14 after the parking motor 12 controls the vehicle to park according to the parking braking force, and if the wheel speed value is determined to be equal to zero, the parking is determined to be completed. If the wheel speed value is determined to be larger than zero, the electronic parking controller 13 directly calculates the parking braking force according to the 20% gradient to control the vehicle to park. And, after the parking motor 12 has been controlled according to the first preset braking force value, the electronic parking controller 13 again reads the wheel speed value from the wheel speed sensor 14, and determines that parking is completed if the wheel speed value is equal to zero. If the wheel speed value is still larger than zero, the parking motor 12 is controlled according to a second preset braking force value, that is, the electronic parking controller 13 controls the vehicle to park according to the maximum allowable parking force value of the electronic parking system of the vehicle.
According to the vehicle 1 provided by the embodiment of the invention, in the whole parking process, the electronic parking controller 13 executes signal reading or calculation and other operations to obtain the parking braking force and control the vehicle to park, a ramp sensor is not required, and the vehicle parking device is simple in structure, low in cost and easy to implement. The electronic parking controller 13 can also judge the parking condition according to the wheel speed value, and after the parking force is applied, the parking force can be increased again according to the parking effect to provide a secondary clamping function, so that the potential safety hazard problem caused by the insufficient parking force is avoided.
Other configurations and operations of the vehicle 1 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling parking of a vehicle, for an electronic parking brake, the method comprising:
receiving a parking signal;
acquiring a brake pipeline pressure value;
obtaining parking braking force according to the pressure value of the brake pipeline;
and controlling a parking motor to brake the wheels according to the parking braking force.
2. The method of controlling parking of a vehicle of claim 1, wherein deriving a parking brake force from the brake line pressure value comprises:
if the pressure value of the brake pipeline is greater than zero, calculating according to the pressure value of the brake pipeline and the size of a wheel brake to obtain the parking braking force;
or, if the pressure value of the brake pipeline is equal to zero, determining that the parking brake force is a first preset brake force value.
3. The method of controlling parking of a vehicle of claim 2, further comprising:
acquiring a wheel speed value;
and if the pressure value of the brake pipeline is greater than zero and the wheel speed value is greater than zero, controlling the parking motor according to a first preset braking force value.
4. The method of controlling parking of a vehicle of claim 3, further comprising:
after the parking motor is controlled according to the first preset braking force value, if the wheel speed value is still larger than zero, the parking motor is controlled according to a second preset braking force value, wherein the second preset braking force value is larger than the first preset braking force value.
5. Method for controlling the parking of a vehicle according to claim 4, characterized in that said first preset power value corresponds to a 20% gradient braking power value and said second preset braking power value is the maximum allowed parking power value of the electronic parking system of the vehicle.
6. The method of controlling parking of a vehicle of claim 2, wherein said obtaining a brake line pressure value comprises:
acquiring a brake pipeline pressure value when the wheel speed value is zero;
or acquiring the average brake pipeline pressure value in the time period from the beginning of the braking action to the disappearance of the braking action.
7. An electronic parking brake, comprising:
the receiving module is used for receiving a parking signal;
the pressure acquisition module is used for acquiring a pressure value of a brake pipeline;
the braking force obtaining module is used for obtaining parking braking force according to the braking pipeline pressure value;
and the control module is used for controlling the parking motor to brake the wheels according to the parking braking force.
8. A vehicle parking system, comprising:
a parking switch for outputting a parking signal according to a parking operation;
the parking motor is connected with a brake of a vehicle and used for driving the brake to perform braking action;
an electronic parking controller, connected to both the parking switch and the parking motor, for controlling the parking motor according to the method for controlling parking of a vehicle as claimed in any one of claims 1 to 6.
9. The vehicle park system according to claim 8, further comprising:
and the wheel speed sensor is connected with the electronic parking controller and used for detecting a wheel speed value.
10. A vehicle, characterized by comprising:
the auxiliary power-assisted system is connected with the brake pedal, the vehicle electronic stabilizing system is connected with the auxiliary power-assisted system, the vehicle electronic stabilizing system is connected with the brake through a brake pipeline, and the vehicle electronic stabilizing system is used for detecting the pressure value of the brake pipeline;
the vehicle park system of claim 8 or 9, reading the brake line pressure value from the vehicle electronic stability system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110740188.3A CN115534913A (en) | 2021-06-30 | 2021-06-30 | Method for controlling parking of vehicle, electronic parking brake, parking system and vehicle |
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| CN202110740188.3A CN115534913A (en) | 2021-06-30 | 2021-06-30 | Method for controlling parking of vehicle, electronic parking brake, parking system and vehicle |
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