Method for Controlling Vehicle Parking, Electronic Parking Brake, Parking System and Vehicle

Abstract

The present invention discloses a method for controlling vehicle parking, an electronic parking brake, a vehicle parking system, and a vehicle. Among them, the method for controlling vehicle parking is used for the electronic parking brake, and the method includes: receiving a parking signal; obtaining a brake pipeline pressure value; obtaining a parking braking force according to the brake pipeline pressure value; and controlling a parking electric motor to brake the wheels according to the parking braking force. The method for controlling vehicle parking in the embodiments of the present invention does not require a ramp sensor, and the required hardware structure is simple, with low cost, easy to implement, and wide application range.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a method for controlling vehicle parking, an electronic parking brake, a vehicle parking system, and a vehicle. Background Art

[0002] During actual driving, after the vehicle brakes, it is necessary to activate the vehicle parking function to prevent the vehicle from rolling. During parking, generally, a slope sensor calculates the parking braking force to achieve vehicle parking.

[0003] In some solutions, an anti-rolling vehicle parking control system for electric vehicles without an inclination sensor is disclosed. In this system, the vehicle controller obtains various acquisition signals through an accelerator pedal signal acquisition device, a brake pedal signal acquisition device, and a shift lever signal acquisition device, and conducts information interaction with the motor controller. A DC power supply, a power unit, a current detection device, and a motor speed detection device are also provided. The motor controller controls the operation of the motor according to vehicle information, motor speed information, current information, etc., so as to achieve vehicle parking on a slope.

[0004] In the above solution, although a slope sensor is not provided, a variety of signal acquisition devices are provided, the hardware structure is relatively complex, and it is mainly applicable to electric vehicles, with a small scope of application. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, one of the objectives of the present invention is to propose a method for controlling vehicle parking, which does not require a slope sensor, has a simple hardware structure, low cost, is easy to implement, and has a wide range of applications.

[0006] The second objective of the present invention is to propose an electronic parking brake.

[0007] The third objective of the present invention is to propose a vehicle parking system.

[0008] The fourth objective of the present invention is to propose a vehicle.

[0009] To achieve the above objectives, a method for controlling vehicle parking according to the first aspect embodiment of the present invention is used for an electronic parking brake, and the method includes: receiving a parking signal; obtaining a brake line pressure value; obtaining a parking braking force according to the brake line pressure value; and controlling a parking motor to brake the wheels according to the parking braking force.

[0010] According to the method for controlling vehicle parking in an embodiment of the present invention, when a user has a parking requirement, a parking signal is received and the brake line pressure value is obtained, and the parking braking force is obtained according to the brake line pressure value, and the parking motor is controlled to brake the wheels according to the parking braking force, so as to realize the parking function. The method for controlling vehicle parking of the present invention does not require setting a variety of signal acquisition devices, only the parking signal and the brake line pressure need to be collected, the required hardware structure is simple, and it can quickly respond after reading the parking signal. It is also not necessary to calculate the parking braking force through a ramp sensor, and the parking braking force can be directly obtained according to the brake line pressure value, with low cost and easy implementation, and a wide range of applications.

[0011] In some embodiments of the present invention, obtaining the parking braking force according to the brake line pressure value includes: if the brake line pressure value is greater than zero, calculating the parking braking force according to the brake line pressure value and the size of the wheel brake; or, if the brake line pressure value is equal to zero, determining that the parking braking force is a first preset braking force value.

[0012] In some embodiments of the present invention, the method further includes: obtaining a wheel speed value; if the brake line pressure value is greater than zero and the wheel speed value is greater than zero, controlling the parking motor according to the first preset braking force value.

[0013] In some embodiments of the present invention, the method further includes: after controlling the parking motor according to the first preset braking force value, if it is determined that the wheel speed value is still greater than zero, controlling the parking motor according to a second preset braking force value, where the second preset braking force value is greater than the first preset braking force value.

[0014] In some embodiments of the present invention, the first preset value of the braking force corresponds to the braking force value of a 20% slope, and the second preset braking force value is the maximum allowable parking force value of the vehicle's electronic parking system.

[0015] In some embodiments of the present invention, obtaining the brake line pressure value includes: obtaining the brake line pressure value when the wheel speed value is zero; or, obtaining the average brake line pressure value during the period from the start of the braking action to the disappearance of the braking action.

[0016] To achieve the above object, an electronic parking brake proposed in the second aspect embodiment of the present invention includes: a receiving module for receiving a parking signal; a pressure acquisition module for acquiring a brake line pressure value; a braking force acquisition module for obtaining a parking braking force according to the brake line pressure value; and a control module for controlling the parking motor to brake the wheels according to the parking braking force.

[0017] According to the electronic parking brake of the embodiment of the present invention, after the receiving module receives the parking signal, the pressure acquisition module acquires the brake pipeline pressure, the braking force acquisition module obtains the parking braking force according to the brake pipeline pressure value, and the control module controls the parking electric motor to brake the wheels according to the parking braking force. Based on architectures such as the receiving module, the pressure acquisition module, the braking force acquisition module, and the control module, for tasks such as executing signal reception processing and parameter calculation, it can quickly respond to the parking signal, thereby realizing the parking function of the vehicle. There is no need to set a ramp sensor, and the cost is low and it is easy to implement.

[0018] To achieve the above object, the vehicle parking system proposed in the third aspect embodiment of the present invention includes: a parking switch for outputting a parking signal according to a parking operation; a parking motor connected to the brake of the vehicle for driving the brake to perform a 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 vehicle parking described in any one of the above embodiments.

[0019] According to the vehicle parking system of the embodiment of the present 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 action of the parking motor according to the parking braking force, and the parking motor drives the brake to perform a braking action, thereby realizing the parking function. In the vehicle parking system of the present invention, under different vehicle parking conditions, when the user operates the parking switch, the entire system can respond in a timely manner, and the electronic parking controller directly reads the signal, calculates and obtains the parking braking force, and controls the action of the parking motor. There is no need to set a ramp sensor, the structure is simple, the cost is low and it is easy to implement, and the applicable range is wide.

[0020] In some embodiments of the present invention, the vehicle parking system further includes: a wheel speed sensor connected to the electronic parking controller for detecting the wheel speed value.

[0021] To achieve the above object, a vehicle proposed in the fourth aspect embodiment of the present invention includes: a brake pedal, an auxiliary boost system, a vehicle electronic stability system, and a brake. The auxiliary boost system is connected to the brake pedal, the vehicle electronic stability system is connected to the auxiliary boost system, the vehicle electronic stability system is connected to the brake through a brake pipeline, and the vehicle electronic stability system is used to detect the brake pipeline pressure value of the brake pipeline; the vehicle parking system described in the third aspect embodiment, and the vehicle parking system is connected to the vehicle electronic stability system.

[0022] For a vehicle according to an embodiment of the present invention, when the driver controls the vehicle to decelerate, the vehicle electronic stability system detects and stores the braking pipeline pressure value of the braking pipeline. When the user controls the vehicle to park, the vehicle parking system reads the braking pipeline pressure value stored in the vehicle electronic stability system, calculates the parking braking force based on the braking pipeline pressure value, and thus controls the vehicle to park. By arranging the vehicle parking system in the vehicle, the vehicle parking system obtains the parking braking force and controls the vehicle to park, without the need to arrange a ramp sensor, with a simple structure, low cost and easy implementation, and a wide range of applications.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a flowchart of a method for controlling vehicle parking according to an embodiment of the present invention;

[0026] Figure 2 is a flowchart of a method for controlling vehicle parking according to another embodiment of the present invention;

[0027] Figure 3 is a flowchart of a method for controlling vehicle parking according to still another embodiment of the present invention;

[0028] Figure 4 is a flowchart of a method for controlling vehicle parking according to still another embodiment of the present invention;

[0029] Figure 5 is a block diagram of an electronic parking brake according to an embodiment of the present invention;

[0030] Figure 6 is a block diagram of a vehicle parking system according to an embodiment of the present invention;

[0031] Figure 7 is a block diagram of a vehicle parking system according to another embodiment of the present invention;

[0032] Figure 8 is a block diagram of a vehicle according to an embodiment of the present invention;

[0033] Figure 9 is a schematic diagram of a vehicle according to an embodiment of the present invention.

[0034] Reference Signs:

[0035] Vehicle 1;

[0036] Electronic parking brake 100;

[0037] Receiving module 101, pressure acquisition module 102, braking force acquisition module 103, control module 104;

[0038] Vehicle parking system 10, brake pedal 20, auxiliary boosting system 30, vehicle electronic stability system 40, brake 50;

[0039] Parking switch 11, parking motor 12, electronic parking controller 13, wheel speed sensor 14;

[0040] Brake pipeline L, left front wheel FL, right front wheel FR, left rear wheel RL, right rear wheel RR. Detailed implementation manner

[0041] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0042] Reference will be made below Figures 1-4 to describe a method for controlling vehicle parking according to an embodiment of the present invention. It should be noted that the step numbers in this application, such as S1, S2, S3, and S4, etc., are only for the convenience of describing the solution and should not be construed as a limitation on the order of the steps. That is to say, for example, the execution order of steps S1, S2, S3, and S4, etc., can be specifically determined according to actual needs, not limited to the order of the steps in the following embodiments.

[0043] In some embodiments of the present invention, as Figure 1 shown, it is a flowchart of a method for controlling vehicle parking according to an embodiment of the present invention. Among them, the method for controlling vehicle parking is used for an electronic parking brake. The method includes steps S1 - S4, which are specifically as follows.

[0044] S1, a parking signal is received.

[0045] In the embodiment, when the user has a parking requirement, the user can send a parking signal by operating a parking switch or the like. The parking switch may include a handbrake lever or an electronic parking button or the like. Or, in a vehicle with a hill - start assist function, when the user is driving the vehicle uphill, during the hill - start, the system can automatically send a parking signal to provide short - time braking.

[0046] S2, the brake pipeline pressure value is acquired.

[0047] Specifically, acquiring the brake pipeline pressure value may include acquiring the brake pipeline pressure value when the wheel speed value is zero, or acquiring the average brake pipeline pressure value during the period from the start of the braking action to the disappearance of the braking action. The vehicle electronic stability system will detect and store the brake pipeline pressure value of the brake pipeline.

[0048] For example, the vehicle electronic stability system can store the brake line pressure values during the entire driving process from the vehicle's power-on to power-off this time, or can store the brake line pressure values within a fixed mileage up to this vehicle's current driving, or when the driver steps on the brake pedal to control the vehicle from running to a stationary state, the number of occurrences of this process can be preset, and the brake line pressure values within the corresponding number of times can be stored, etc.

[0049] S3. Obtain the parking braking force according to the brake line pressure value.

[0050] In an embodiment, an electronic parking controller can be set. The electronic parking controller obtains the brake line pressure value from the vehicle electronic stability system and obtains the parking braking force according to the brake line pressure value. Specifically, parameters such as the calculation method of the parking braking force and the size of the wheel brake can be stored in the electronic parking controller. A program can also be stored in the electronic parking controller. When the program runs, it can execute the calculation method of the parking braking force to obtain the corresponding parking braking force according to the brake line pressure value.

[0051] S4. Control the parking motor to brake the wheels according to the parking braking force. After obtaining the parking braking force, the parking motor drives the parking mechanism to perform a parking action according to the parking braking force. The parking mechanism can output torque according to the parking braking force to brake the wheels, thereby realizing the parking function.

[0052] According to the method for controlling vehicle parking according to an embodiment of the present invention, when the user has a parking requirement, a parking signal is received and the brake line pressure value is obtained, and the parking braking force is obtained according to the brake line pressure value, and the parking motor is controlled to brake the wheels according to the parking braking force, thereby realizing the parking function. The method for controlling vehicle parking according to the present invention does not require setting a variety of signal acquisition devices, only needs to collect the parking signal and the brake line pressure, the required hardware structure is simple, and it can respond quickly after reading the parking signal. It also does not need to calculate the parking braking force through a ramp sensor, can directly obtain the parking braking force according to the brake line pressure value, has a low cost and is easy to implement, and has a wide range of applications.

[0053] In some embodiments of the present invention, as Figure 2 shown, it is a flowchart of a method for controlling vehicle parking according to another embodiment of the present invention. Among them, obtaining the parking braking force according to the brake line pressure value, that is, the above step S3 can include step S31 or step S32, specifically as follows.

[0054] S31. If the brake pipeline pressure value is greater than zero, the parking braking force is calculated based on the brake pipeline pressure value and the size of the wheel brake. Among them, the electronic parking controller can pre-store the calculation formula of the parking braking force, and the obtained brake pipeline pressure value and the size parameter of the wheel brake can be calculated according to the preset calculation formula to obtain the parking braking force.

[0055] S32. If the brake pipeline pressure value is equal to zero, it is determined that the parking braking force is the first preset braking force value. Among them, the first preset value of the braking force corresponds to the braking force value of a 20% slope.

[0056] Specifically, the brake pipeline pressure being equal to zero means that the brake pipeline pressure value cannot be obtained. For example, in the case where the electronic parking controller cannot obtain the brake pipeline pressure value from the vehicle electronic stability system due to a system failure. Another example is that during the operation of the vehicle, when the user does not step on the brake pedal and the vehicle stops running due to factors such as resistance, the brake does not work, and the brake pipeline pressure value in the brake pipeline may be zero. At this time, the electronic parking controller can directly use the first preset braking force value as the parking braking force, that is, the electronic parking controller directly calculates the parking braking force according to a 20% slope to control the parking electric motor to brake the wheels.

[0057] In some embodiments of the present invention, as Figure 3 shown, it is a flowchart of a method for controlling vehicle parking according to another embodiment of the present invention. Among them, the method for controlling vehicle parking further includes step S5 and step S6, which are specifically as follows.

[0058] S5. Obtain the wheel speed value.

[0059] A wheel speed sensor can be set at the wheel to detect the 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.

[0060] Specifically, during the vehicle parking process, after the vehicle is braked, the temperature of the brake is relatively high. After the vehicle has been parked for a period of time, the braking system cools down and the temperature decreases, which may cause insufficient parking force after cooling. If parked on a slope, there may be a safety hazard. Therefore, after the first application of the parking braking force, the electronic parking controller can read the wheel speed value from the wheel speed sensor to judge whether the parking is complete. If the obtained wheel speed value is equal to zero, it is determined that the vehicle is in a stationary state and the parking is completed.

[0061] S6. If the brake pipeline pressure value is greater than zero and the wheel speed value is greater than zero, control the parking motor according to the first preset braking force value.

[0062] In an embodiment, the brake line pressure value is greater than zero. After the electronic parking controller applies the parking braking force for the first time according to the brake line pressure value, if the obtained wheel speed value is greater than zero, it indicates that the vehicle is not completely parked, and phenomena such as vehicle creep may occur, posing a safety hazard. It is necessary to apply the parking braking force again for parking. At this time, the electronic parking controller can directly control the parking motor according to the first preset braking force value, that is, the electronic parking controller directly calculates the parking braking force according to a 20% slope to control the parking motor to brake the wheels.

[0063] In some embodiments of the present invention, as Figure 4 shown, it is a flowchart of a method for controlling vehicle parking according to another embodiment of the present invention. Among them, after controlling the parking motor according to the first preset braking force value, the method for controlling vehicle parking further includes step S7, which is specifically as follows.

[0064] S7. If it is determined that the wheel speed value is still greater than zero, then control the parking motor according to the second preset braking force value, where the second preset braking force value is greater than the first preset braking force value. Among them, the second preset braking force value is the maximum allowable parking force value of the vehicle's electronic parking system.

[0065] After the electronic parking controller has controlled 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 determine whether the parking is complete. If the wheel speed value read this time is equal to zero, it is determined that the parking is complete. If the wheel speed value read this time is greater than zero, it indicates that the vehicle is not completely parked, posing a safety hazard. It is necessary to apply a greater parking braking force again for parking. 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 vehicle's electronic parking system.

[0066] During the parking process, by detecting the wheel speed value in real time, the electronic parking controller can judge the parking situation according to the wheel speed value and can also provide a secondary clamping function. After applying the parking force, the parking force can be increased again according to the parking effect to avoid potential safety hazards caused by insufficient parking force.

[0067] In some embodiments of the present invention, as Figure 5 shown, it is a block diagram of an electronic parking brake according to an embodiment of the present invention. Among them, the electronic parking brake 100 includes a receiving module 101, a pressure acquisition module 102, a braking force acquisition module 103, and a control module 104.

[0068] The receiving module 101 is used to receive the parking signal. When the user has a parking requirement, the parking signal can be sent by operating the parking switch or the like and received by the receiving module 101. The pressure acquisition module 102 is used to acquire the brake pipeline pressure value. For example, the pressure acquisition module 102 may include a pressure sensor or the like, which can directly detect the pipeline pressure value. Alternatively, since the brake pipeline contains brake fluid, parameters such as the density of the brake fluid can be acquired, and the brake pipeline pressure value can be obtained according to the calculation formula of liquid pressure and pressure. The acquired brake pipeline pressure value can be the brake pipeline pressure value when the wheel speed is zero, or the average brake pipeline pressure value during the period from the start of the braking action to the disappearance of the braking action.

[0069] The braking force acquisition module 103 is used to obtain the parking braking force according to the brake pipeline pressure value. Specifically, the parking braking force can be calculated according to the brake pipeline pressure value and the size of the wheel brake 50. The control module 104 is used to control the parking electric motor to brake the wheels according to the parking braking force.

[0070] For the electronic parking brake 100 according to the embodiment of the present invention, after the receiving module 101 receives the parking signal, the pressure acquisition module 102 acquires the brake pipeline pressure value, the braking force acquisition module 103 obtains the parking braking force according to the brake pipeline pressure value, and the control module 104 controls the parking electric motor to brake the wheels according to the parking braking force. Based on the architectures such as the receiving module 101, the pressure acquisition module 102, the braking force acquisition module 103, and the control module 104, for performing tasks such as signal reception processing and parameter calculation, it can quickly respond to the parking signal, thereby realizing the parking function of the vehicle. There is no need to set a ramp sensor, and the cost is low and it is easy to implement.

[0071] In some embodiments of the present invention, as Figure 6 shown, it is a block diagram of a vehicle parking system according to an embodiment of the present invention. Among them, the vehicle parking system 10 includes a parking switch 11, a parking electric motor 12, and an electronic parking controller 13.

[0072] The parking switch 11 is used to output a parking signal according to the parking operation. The parking switch 11 may include a handbrake lever or an electronic parking button, etc. When the user confirms the need for parking, the parking switch 11 can be operated to send a parking signal.

[0073] The parking motor 12 is connected to the vehicle's brake 50 and is used to drive the brake 50 to perform a braking action. Among them, the parking motor 12 can be installed beside the wheel and be in contact connection with the wheel. The parking motor 12 can control the action of the brake 50 according to a control signal, thereby braking the wheel or releasing the wheel. For example, the brake 50 can include components such as a brake caliper, a brake disc, brake pads or friction pads, etc. By increasing the braking friction force between the brake 50 and the wheel to brake the wheel, the parking function is thus realized. The brake 50 can be arranged at the rear wheels of the vehicle and connected to the rear wheels to achieve rear-wheel braking. Or, the brake 50 can also be arranged at the wheels of the whole vehicle and connected to the wheels of the whole vehicle to achieve four-wheel braking.

[0074] The electronic parking controller 13 is connected to both the parking switch 11 and the parking motor 12, and is used to control the parking motor 12 according to the method for controlling vehicle parking in any one of the above embodiments. Among them, the electronic parking controller 13 can obtain the parking signal output by the parking switch 11. And when the electronic parking controller 13 receives the parking signal, it also obtains the parking braking force, and controls the action of the parking motor 12 according to the parking braking force, thereby realizing the parking function. Among them, the electronic parking controller 13 can be a parking ECU (Electronic Control Unit), and the parking motor 12 and / or the electronic parking controller 13 can also be integrally arranged in the vehicle's brake 50 (not marked in Figure 6 ). The electronic parking controller 13 can realize functions such as signal reading and processing, and sending control signals or instructions through software.

[0075] Specifically, during the parking process, the user can send a parking signal by operating the parking switch 11. After the electronic parking controller 13 receives the parking signal, it can obtain the brake line pressure value and make a judgment. For example, when the brake line pressure value is greater than zero, the parking braking force is calculated according to the brake line pressure value and the size of the wheel brake. Or, when the brake line pressure value is equal to zero, the parking braking force is directly calculated according to a 20% slope. The electronic parking controller 13 sends a control signal to the parking motor 12 according to the obtained parking braking force. The parking motor 12 responds to the control signal and drives the brake 50 to perform a braking action, thereby realizing the parking function.

[0076] For the vehicle parking system 10 according to an embodiment of the present 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 operation of the parking motor 12 according to the parking braking force. The parking motor 12 drives the brake 50 to perform a braking action, thereby realizing the parking function. In the vehicle parking system 10 of the present invention, under different vehicle parking conditions, when the user operates the parking switch 11, the entire system 10 can respond in a timely manner, and the electronic parking controller 13 directly reads the signal, calculates to obtain the parking braking force, and controls the operation of the parking motor 12 without setting a ramp sensor. The structure is simple, the cost is low and it is easy to implement, and the applicable range is wide.

[0077] In some embodiments of the present invention, as Figure 7 shown, it is a block diagram of a vehicle parking system according to another embodiment of the present invention. Among them, 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 the wheel speed value.

[0078] The wheel speed sensor 14 can be set at the wheel to detect the wheel speed value. For example, the wheel speed sensor 14 can be installed at all four wheels, so as to detect the wheel speed values of the four wheels. The electronic parking controller 13 can judge the running state of the vehicle according to the detected four wheel speed values. For example, when the wheel speed sensor 14 detects that the wheel speed value is equal to zero, it is determined that the vehicle is stationary. Or, when the wheel speed sensor 14 detects that the wheel speed value is greater than zero, it is determined that the vehicle is in a moving state. The electronic parking controller 13 can also directly calculate to obtain the parking braking force.

[0079] Specifically, during the vehicle parking process, after the electronic parking controller 13 obtains the parking braking force according to the brake pipeline pressure value 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. If it is determined that the wheel speed value is equal to zero, it is determined that the parking is completed. If it is determined that the wheel speed value is greater than zero, the electronic parking controller 13 controls the operation of the parking motor 12 according to the first preset braking force value, that is, the electronic parking controller 13 directly calculates the parking braking force according to a 20% gradient 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. If the wheel speed value is equal to zero, it is determined that the parking is completed. If it is determined that the wheel speed value is still greater than zero, the parking motor 12 is controlled 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 vehicle's electronic parking system.

[0080] During the parking process, the wheel speed sensor 14 is set to detect the wheel speed value in real time. The electronic parking controller 13 can judge the parking situation according to the wheel speed value. The vehicle parking system 10 can provide a secondary clamping function. After applying the parking force, the parking force can be increased again according to the parking effect to avoid potential safety hazards caused by insufficient parking force.

[0081] In some embodiments of the present invention, as Figure 8 shown, it is a block diagram of a vehicle according to an embodiment of the present invention. Among them, the vehicle 1 includes a brake pedal 20, an auxiliary boost system 30, a vehicle electronic stability system 40, a brake 50, and the vehicle parking system 10 in the third aspect embodiment above.

[0082] Among them, the auxiliary boost system 30 is connected to the brake pedal 20, the vehicle electronic stability system 40 is connected to the auxiliary boost system 30, the vehicle electronic stability system 40 is connected to the brake 50 through a brake line L, and the vehicle electronic stability system 40 is used to detect the brake line pressure value of the brake line L. The brake line pressure value can be the brake line pressure value when the wheel speed value is zero, or the average brake line pressure value during the period from the start of the braking action to the disappearance of the braking action.

[0083] Among them, the vehicle electronic stability system 40 can store the detected brake line pressure value, and can also store the brake line pressure value within a fixed time period. For example, the vehicle electronic stability system 40 can store the brake line pressure value during the entire driving process from the power-on of the vehicle 1 to the power-off of the vehicle 1, or can store the brake line pressure value within a fixed mileage up to the current driving of the vehicle 1. Or, when the driver steps on the brake pedal 20 to control the vehicle 1 from running to a stationary state, the number of occurrences of this process can be preset, and the brake line pressure values within the corresponding number of times can be stored, etc.

[0084] In the embodiment, the vehicle parking system 10 reads the brake line pressure value from the vehicle electronic stability system 40.

[0085] Among them, the functions of the vehicle parking system 10 for signal reading, processing, and sending control signals or instructions can be realized by software. Some structures in the vehicle parking system 10, such as the parking motor 12 and / or the electronic parking controller 13, etc., can be integrally arranged in the vehicle brake 50. When a parking operation is required, the vehicle parking system 10 can directly read the brake line pressure value from the vehicle electronic stability system 40.

[0086] Specifically, during the process of the vehicle 1 decelerating from normal driving to parking, there is a deceleration braking process for the vehicle 1. When the driver steps on the brake pedal 20 to control the vehicle 1 to decelerate, the auxiliary boost system 30 generates braking pressure and sends it to the vehicle electronic stability system 40. The vehicle electronic stability system 40 transmits the braking pressure through the brake pipeline L to the brake 50, and the brake 50 operates to achieve the deceleration of the vehicle 1. During the whole process, the vehicle electronic stability system 40 detects and stores the braking pipeline pressure value of the brake pipeline L. After the vehicle 1 decelerates to zero, when the user controls the vehicle 1 to park, the vehicle parking system 10 reads the braking pipeline pressure value stored in the vehicle electronic stability system 40, and calculates the parking braking force based on the braking pipeline pressure value and the size of the wheel brake 50, so as to control the vehicle 1 to park.

[0087] For the vehicle 1 according to the embodiment of the present invention, when the driver controls the vehicle 1 to decelerate, the vehicle electronic stability system 40 detects and stores the braking pipeline pressure value of the brake pipeline L. When the user controls the vehicle 1 to park, the vehicle parking system 10 reads the braking pipeline pressure value stored in the vehicle electronic stability system 40, and calculates to obtain the parking braking force, 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 obtains the parking braking force and controls the vehicle to park. There is no need to set a ramp sensor, the structure is simple, the cost is low and it is easy to implement, and the applicable range is wide.

[0088] In some embodiments of the present invention, as Figure 9 shown, it is a schematic diagram of a vehicle according to an embodiment of the present invention. Among them, FL represents the left front wheel, FR represents the right front wheel, RL represents the left rear wheel, RR represents the right rear wheel, and a wheel speed sensor 14 is provided at each wheel, respectively used to collect the wheel speed values of the four wheels, and the four wheels are all connected to the vehicle electronic stability system 40 through the brake pipeline 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, etc. can be integrally arranged in the brake 50 ( Figure 9 not marked in the figure). The solid lines in the figure represent the hardware pipeline connections, and the dashed lines represent the signal transmission directions. The signal transmission process can be realized through software.

[0089] In an embodiment, when controlling the vehicle 1 to decelerate and park, the driver steps on the brake pedal 20, and the auxiliary boost system 30 generates a braking pressure and sends it to the vehicle electronic stability system 40. The vehicle electronic stability system 40 transmits the braking pressure to the brake 50 through the brake line L, and the brake 50 operates to decelerate the vehicle 1. During the whole process, the vehicle electronic stability system 40 detects and stores the braking line pressure value of the brake line L. After the vehicle 1 decelerates to zero, the user operates the parking switch 11 to send a parking signal. After receiving the parking signal, the electronic parking controller 13 can read the braking line pressure value from the vehicle electronic stability system 40 and make a judgment. For example, when the braking line pressure value is greater than zero, the parking braking force is calculated based on the braking line pressure value and the size of the wheel brake. Or, when the braking line pressure value is equal to zero, that is, the electronic parking controller 13 cannot obtain the braking line pressure value, the parking braking force is directly calculated according to a 20% slope, 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 outputs torque according to the parking braking force to brake the wheels, thereby realizing the parking function.

[0090] Meanwhile, the wheel speed sensor 14 continuously detects the wheel speed value. After the electronic parking controller 13 obtains the parking braking force based on the read braking line pressure value and the parking motor 12 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. If it is determined that the wheel speed value is equal to zero, it is determined that the parking is completed. If it is determined that the wheel speed value is greater than zero, the electronic parking controller 13 directly calculates the parking braking force according to a 20% slope to control the vehicle to park. Also, 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. If the wheel speed value is equal to zero, it is determined that the parking is completed. If it is determined that the wheel speed value is still greater than zero, the parking motor 12 is controlled 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 vehicle's electronic parking system.

[0091] For the vehicle 1 according to the embodiment of the present invention, during the whole parking process, the electronic parking controller 13 performs operations such as signal reading or calculation to obtain the parking braking force and control the vehicle to park. There is no need to set a ramp sensor, the structure is simple, the cost is low and it is easy to implement. The electronic parking controller 13 can also judge the parking situation according to the wheel speed value. After applying the parking force, the parking force can be increased again according to the parking effect to provide a secondary clamping function, avoiding potential safety hazards caused by insufficient parking force.

[0092] 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 here.

[0093] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0094] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for controlling vehicle parking, characterized in that, For an electronic parking brake, the method includes: Receiving a parking signal; Obtaining a brake pipeline pressure value, where the brake pipeline pressure value is the brake pipeline pressure value when the vehicle decelerates during braking until the wheel speed value becomes zero, or the brake pipeline pressure value is the average brake pipeline pressure value of the brake pipeline pressure values stored during the period from the start to the disappearance of the braking action; Obtaining a parking braking force based on the brake pipeline pressure value, where if the brake pipeline pressure value is greater than zero, the parking braking force is calculated based on the brake pipeline pressure value and the size of the wheel brake, or if the brake pipeline pressure value is equal to zero, the parking braking force is determined to be a first preset braking force value; Controlling a parking electric motor to brake the wheels based on the parking braking force; The method further includes: obtaining a wheel speed value, and if the brake pipeline pressure value is greater than zero and the wheel speed value is greater than zero, controlling the parking electric motor based on the first preset braking force value.

2. The method for controlling vehicle parking according to claim 1, wherein The method further includes: After controlling the parking electric motor based on the first preset braking force value, if it is determined that the wheel speed value is still greater than zero, controlling the parking electric motor based on a second preset braking force value, where the second preset braking force value is greater than the first preset braking force value.

3. The method for controlling vehicle parking according to claim 2, wherein The first preset braking force value corresponds to the braking force value for a 20% slope, and the second preset braking force value is the maximum allowable parking force value of the vehicle's electronic parking system.

4. An electronic parking brake, characterized in that, Including: A receiving module for receiving a parking signal; A pressure obtaining module for obtaining a brake pipeline pressure value, where the brake pipeline pressure value is the brake pipeline pressure value when the vehicle decelerates during braking until the wheel speed value becomes zero, or the brake pipeline pressure value is the average brake pipeline pressure value of the brake pipeline pressure values stored during the period from the start to the disappearance of the braking action; A braking force obtaining module for obtaining a parking braking force based on the brake pipeline pressure value, where if the brake pipeline pressure value is greater than zero, the parking braking force is calculated based on the brake pipeline pressure value and the size of the wheel brake, or if the brake pipeline pressure value is equal to zero, the parking braking force is determined to be a first preset braking force value, and is further used for obtaining a wheel speed value, and if the brake pipeline pressure value is greater than zero and the wheel speed value is greater than zero, controlling the parking electric motor based on the first preset braking force value; A control module for controlling a parking electric motor to brake the wheels based on the parking braking force.

5. A vehicle parking system, characterized in that, Including: A parking switch for outputting a parking signal according to a parking operation; A parking electric motor, which is connected to the vehicle's brake and is used to drive the brake to perform a braking action; An electronic parking controller, which is connected to both the parking switch and the parking electric motor, and is used to control the parking electric motor according to the method for controlling vehicle parking according to any one of claims 1 - 3; A wheel speed sensor, which is connected to the electronic parking controller and is used to detect a wheel speed value.

6. A vehicle, characterized in that, Including: A brake pedal, an auxiliary boost system, a vehicle electronic stability system, and a brake. The auxiliary boost system is connected to the brake pedal. The vehicle electronic stability system is connected to the auxiliary boost system. The vehicle electronic stability system is connected to the brake through a brake pipeline. The vehicle electronic stability system is configured to detect a brake pipeline pressure value of the brake pipeline. The vehicle parking system according to claim 5, wherein the vehicle parking system reads the brake pipeline pressure value from the vehicle electronic stability system.

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