Brake system, control method thereof and automobile

Abstract

The invention relates to the technical field of vehicles, and discloses a braking system, a control method thereof and an automobile, and the method comprises the steps: responding to a braking pedal to trigger braking, obtaining the braking stroke and the braking force of the braking pedal, and uploading the braking stroke and the braking force to a calculation module, the calculation module determines a master cylinder target pressure for the brake master cylinder according to the brake stroke, the brake force and the driving data; and the main cylinder real-time pressure and the main cylinder target pressure of the brake main cylinder are obtained, and the piston motor is driven to rotate from the initial position to the target position in the target direction according to the main cylinder target pressure, so that the main cylinder real-time pressure of the brake main cylinder reaches the main cylinder target pressure. According to the method, when the brake pedal is stepped on, the main cylinder real-time pressure and the main cylinder target pressure of the brake main cylinder are obtained, the piston motor is driven to rotate, so that the main cylinder real-time pressure of the brake main cylinder reaches the target pressure, the brake idle stroke is eliminated, the time delay of brake control is shortened, and efficient and comfortable brake experience is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a control method of a braking system, a braking system and a vehicle. Background Art

[0002] At present, in the hydraulic brake system, under certain working conditions (such as the Anti-lock Braking System (ABS) working, energy recovery being enabled, etc.), since the brake pedal is connected to the vacuum booster and the brake master cylinder through a lever mechanism, when the Anti-lock Braking System, energy recovery and other working conditions occur, the brake fluid in the hydraulic pipeline will quickly and massively flow back into the brake master cylinder, the piston in the master cylinder will be impacted, and then push back the brake pedal, the driver will feel a strong impact on the pedal, resulting in an uncomfortable driving experience.

[0003] In addition, due to the hardware structure and working principle of the vacuum booster, there will be a period of idle travel after the driver steps on the brake pedal. During this stage, the vacuum booster has no output force, which will weaken the responsiveness and braking performance of the braking system. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose a control method for a brake system, which obtains the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder when the brake pedal is depressed, and drives the piston motor to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of brake control, and at the same time, prevent the pedal rebound vibration in the anti-lock braking system mode and energy recovery process, eliminate noise, and do not need to change the original hydraulic brake system, retaining mechanical redundancy and failure backup.

[0005] A second object of the present invention is to provide a braking system.

[0006] The third object of the present invention is to provide a car.

[0007] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present invention proposes a control method for a braking system, which is applied to a braking system, wherein the braking system includes a brake pedal, a sensor, a controller, a piston motor, a master cylinder piston and a brake master cylinder; the brake pedal is connected to the sensor, the sensor is connected to the controller, the controller is connected to the piston motor, and the piston motor is connected to the brake master cylinder through the master cylinder piston; the above-mentioned method includes: in response to the brake pedal triggering braking, obtaining the braking stroke and braking force of the brake pedal, and uploading the braking stroke and braking force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the braking stroke, braking force and driving data; obtaining the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and driving the piston motor to rotate from an initial position to a target direction to a target position according to the master cylinder target pressure, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure.

[0008] In addition, the control method of the brake system according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the method further comprises: in response to the brake pedal being released, driving the piston motor to rotate from the target position in a direction opposite to the target direction to an initial position.

[0010] According to some embodiments of the present invention, the method further comprises: in response to the brake pedal maintaining a state of triggering braking within a preset time interval, controlling the piston motor to maintain the target position.

[0011] According to some embodiments of the present invention, the method further comprises: in response to a brake failure of the brake pedal, driving the piston motor to rotate from a current position toward a target direction to a target position according to a uniform linear stroke.

[0012] The control method of the brake system according to the embodiment of the present invention comprises: in response to the brake pedal triggering the brake, obtaining the brake stroke and the brake force of the brake pedal, and uploading the brake stroke and the brake force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the brake stroke, the brake force and the driving data; obtaining the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and driving the piston motor to rotate from the initial position to the target direction to the target position according to the master cylinder target pressure, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure. Therefore, when the brake pedal is stepped on, the method obtains the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and drives the piston motor to rotate, so that the master cylinder real-time pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact feeling in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the brake idle stroke, reduce the time delay of the brake control, and at the same time, prevent the pedal rebound vibration in the anti-lock braking system mode and the energy recovery process, eliminate noise, and do not need to change the original hydraulic brake system, retaining mechanical redundancy and failure backup.

[0013] The second purpose of the present invention is to propose a braking system, which obtains the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder when the brake pedal is depressed, and drives the piston motor to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact feeling existing in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of braking control, and at the same time, prevent pedal rebound vibration in the anti-lock braking system mode and energy recovery process, eliminate noise, and there is no need to change the original hydraulic braking system, retaining mechanical redundancy and failure backup.

[0014] To achieve the above-mentioned purpose, a second embodiment of the present invention proposes a braking system, including a brake pedal, a sensor, a controller, a piston motor, a master cylinder piston and a brake master cylinder; the brake pedal is connected to the sensor, the sensor is connected to the controller, the controller is connected to the piston motor, and the piston motor is connected to the brake master cylinder through the master cylinder piston; the sensor is configured to trigger braking in response to the brake pedal, obtain the braking stroke and braking force of the brake pedal, and upload the braking stroke and braking force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the braking stroke, braking force and driving data; the controller is configured to obtain the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and drive the piston motor to rotate from an initial position to a target position in a target direction according to the master cylinder target pressure; wherein the target position corresponds to the master cylinder target pressure; the piston motor is configured to drive the master cylinder piston to squeeze the brake fluid in the brake master cylinder, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure.

[0015] In addition, the braking system according to the above embodiment of the present invention may also have the following additional technical features:

[0016] According to some embodiments of the present invention, the sensor is also configured to send a brake release command to the controller in response to the brake pedal releasing the brake; the controller is also configured to drive the piston motor to rotate from the target position in the opposite direction of the target direction to the initial position in response to receiving the brake release command.

[0017] According to some embodiments of the present invention, the sensor is also configured to issue a pressure maintaining command to the controller in response to the brake pedal maintaining a state of triggering braking within a preset time interval; the controller is also configured to control the piston motor to maintain the target position in response to receiving the pressure maintaining command.

[0018] According to some embodiments of the present invention, the sensor is also configured to send a fault command to the controller in response to a brake failure of the brake pedal; the controller is also configured to drive the piston motor to rotate from the current position to the target position in a uniform linear stroke in response to receiving the fault command.

[0019] According to some embodiments of the present invention, the brake master cylinder is connected to the brake slave cylinder through a hydraulic pipeline, and the brake slave cylinder is connected to the friction plate; when the piston motor drives the master cylinder piston to squeeze the brake fluid in the brake master cylinder, the oil pressure in the hydraulic pipeline increases to push the brake slave cylinder, so that the brake slave cylinder pushes the friction plate to contact the brake disc to achieve braking.

[0020] According to an embodiment of the present invention, the braking system includes a brake pedal, a sensor, a controller, a piston motor, a master cylinder piston and a brake master cylinder; the brake pedal is connected to the sensor, the sensor is connected to the controller, the controller is connected to the piston motor, and the piston motor is connected to the brake master cylinder through the master cylinder piston; the sensor is configured to trigger braking in response to the brake pedal, obtain the braking stroke and braking force of the brake pedal, and upload the braking stroke and braking force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the braking stroke, braking force and driving data; the controller is configured to obtain the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and drive the piston motor to rotate from an initial position to a target position in a target direction according to the master cylinder target pressure; wherein the target position corresponds to the master cylinder target pressure; the piston motor is configured to drive the master cylinder piston to squeeze the brake fluid in the brake master cylinder, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure. Therefore, when the brake pedal is depressed, the system obtains the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder, and drives the piston motor to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure. This can solve the problems of invalid stroke and pedal impact feeling in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of braking control, and at the same time, prevent pedal rebound vibration in the anti-lock braking system mode and energy recovery process, eliminate noise, and there is no need to change the original hydraulic braking system, retaining mechanical redundancy and failure backup.

[0021] To achieve the above-mentioned object, a third aspect of the present invention provides an automobile, comprising the above-mentioned braking system.

[0022] According to the automobile of the embodiment of the present invention, through the above-mentioned braking system, when the brake pedal is pressed, the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder are obtained, and the piston motor is driven to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact feeling existing in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of braking control, and at the same time, prevent the pedal rebound vibration in the anti-lock braking system mode and the energy recovery process, eliminate noise, and there is no need to change the original hydraulic braking system, retaining mechanical redundancy and failure backup.

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

[0024] Figure 1 is a block diagram of a braking system according to some embodiments of the present invention;

[0025] Figure 2 is a flowchart of a method for controlling a braking system according to some embodiments of the present invention;

[0026] Figure 3 is a flow chart of a control method of a braking system according to some other embodiments of the present invention;

[0027] Figure 4 is a block diagram of a car according to some embodiments of the present invention.

[0028] Description of reference numerals:

[0029] 100-brake system, 10-brake pedal, 20-sensor, 30-controller, 40-piston motor, 50-master cylinder piston, 60-brake master cylinder and 400-car. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] As mentioned in the background technology section, currently, in a hydraulic brake system, under certain operating conditions (such as when the anti-lock brake system is working, energy recovery is enabled, etc.), the driver will feel a strong impact on the pedal, resulting in an uncomfortable driving experience.

[0033] In the process of implementing the present invention, the applicant discovered that the reason for the strong impact feeling of the pedal may be that the brake pedal is connected to the vacuum booster and the brake master cylinder through a lever mechanism. When the anti-lock braking system, energy recovery and other working conditions occur, the brake fluid in the hydraulic pipeline quickly and massively flows back to the brake master cylinder, and the piston in the master cylinder will be impacted, thereby pushing the brake pedal back.

[0034] In addition, due to the hardware structure and working principle of the vacuum booster, there will be a period of idle travel after the driver steps on the brake pedal. During this stage, the vacuum booster has no output force, which will weaken the responsiveness and braking performance of the braking system.

[0035] Therefore, the present invention can obtain the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder when the brake pedal is depressed, and drive the piston motor to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact feeling in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of braking control, and at the same time, prevent pedal rebound vibration in the anti-lock braking system mode and energy recovery process, eliminate noise, and there is no need to change the original hydraulic braking system, retaining mechanical redundancy and failure backup.

[0036] The following describes a control method for a braking system, a braking system, and a vehicle according to an embodiment of the present invention with reference to the accompanying drawings.

[0037] refer to Figure 1 , is a block diagram of a brake system according to some embodiments of the present invention. The brake system 100 according to the embodiment of the present invention includes a brake pedal 10, a sensor 20, a controller 30, a piston motor 40, a master cylinder piston 50, and a brake master cylinder 60. The brake pedal 10 is connected to the sensor 20, the sensor 20 is connected to the controller 30, the controller 30 is connected to the piston motor 40, and the piston motor 40 is connected to the brake master cylinder 60 through the master cylinder piston 50. Thus, by releasing the strong coupling between the brake pedal 10 and the brake master cylinder 60 of the hydraulic system, the brake pedal 10 and the brake master cylinder 60 are isolated, and the brake pedal 10 can be controlled. Reference Figure 2 , which is a flow chart of a method for controlling a braking system according to some embodiments of the present invention.

[0038] like Figure 2 As shown, the control method of the braking system according to the embodiment of the present invention may include the following steps:

[0039] S201, in response to the brake pedal triggering the brake, obtain the braking stroke and braking force of the brake pedal, and upload the braking stroke and braking force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the braking stroke, braking force and driving data.

[0040] Specifically, when the brake pedal triggers braking, where the brake pedal triggering braking may be the driver stepping on the brake pedal, receiving a start command triggered by the brake pedal, or when the brake pedal is an electric pedal, the pulse of the brake pedal is greater than a certain threshold, and when the brake pedal is a mechanical pedal, the travel of the brake pedal is greater than a certain threshold, the brake travel and braking force of the brake pedal may be detected by a sensor, where the sensor may be a pedal sensor, and the brake travel and braking force may be uploaded to a calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the brake travel, the braking force and the driving data, where the driving data may include information such as the current vehicle speed, acceleration, and slip rate of the vehicle. Then, the calculation module sends the master cylinder target pressure for the brake master cylinder to the controller.

[0041] Among them, the slip rate refers to the proportion of the sliding component during the movement of the wheel, which reflects the relative slip degree between the wheel and the ground.

[0042] S202, obtaining the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and driving the piston motor to rotate from the initial position to the target position in the target direction according to the master cylinder target pressure, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure.

[0043] Specifically, the real-time master cylinder pressure of the brake master cylinder can be detected by the pressure sensor arranged on the brake master cylinder, and the real-time master cylinder pressure of the brake master cylinder can be sent to the controller. When the controller receives the master cylinder target pressure for the brake master cylinder sent by the calculation module and the real-time master cylinder pressure of the brake master cylinder detected by the pressure sensor, the piston motor is driven to rotate from the initial position to the target direction (positive direction) to the target position according to the master cylinder target pressure, and the real-time master cylinder pressure of the brake master cylinder is increased, so that the real-time master cylinder pressure of the brake master cylinder reaches the master cylinder target pressure, wherein the target position can represent the position of the piston motor corresponding to the position where the car stops. Thus, the problems of invalid stroke and pedal impact feeling existing in the application of vacuum booster can be solved, and an efficient and comfortable braking experience can be provided. The brake pedal is decoupled from the brake master cylinder, the brake idle stroke is eliminated, and the time delay of the brake control is reduced. At the same time, the pedal rebound vibration in the anti-lock braking system mode and the energy recovery process is prevented, and the noise is eliminated. There is no need to change the original hydraulic brake system, and the mechanical redundancy and failure backup are retained.

[0044] In some embodiments of the present invention, the method further comprises: in response to the brake pedal being released, driving the piston motor to rotate from the target position in a direction opposite to the target direction to an initial position.

[0045] Specifically, when the brake pedal is released, where the action of releasing the brake pedal can be the driver releasing the brake pedal, receiving a command to release the brake pedal, or when the brake pedal is an electric pedal, the pulse of the brake pedal is less than a certain threshold, and when the brake pedal is a mechanical pedal, the stroke of the brake pedal is less than a certain threshold, the controller can detect that the brake pedal is not depressed, drive the piston motor to rotate from the target position in the opposite direction (reverse) of the target direction to the initial position, drive the master cylinder piston back to the initial position, thereby reducing the real-time master cylinder pressure of the brake master cylinder.

[0046] In some embodiments of the present invention, the method further comprises: in response to the brake pedal maintaining a state of triggering braking within a preset time interval, controlling the piston motor to maintain the target position. The preset time interval can be set according to actual conditions.

[0047] Specifically, it is determined whether the brake pedal maintains the state of triggering the brake within a preset time interval. When the brake pedal maintains the state of triggering the brake within the preset time interval, it can be indicated that the brake pedal has been in the state of triggering the brake and is not in the state of releasing the brake pedal, that is, the driver has not released the brake pedal. In order to stop the vehicle, the piston motor is controlled to maintain the target position at this time, so that the real-time master cylinder pressure of the master cylinder of the brake master cylinder always maintains the master cylinder target pressure. When the brake pedal does not maintain the state of triggering the brake within the preset time interval, it can be indicated that the brake pedal is in the state of releasing the brake pedal, that is, the driver has released the brake pedal, driving the piston motor to rotate from the target position to the opposite direction of the target direction to the initial position, driving the master cylinder piston to return to the initial position, thereby reducing the real-time master cylinder pressure of the brake master cylinder.

[0048] In some embodiments of the present invention, the method further comprises: in response to a brake failure of the brake pedal, driving the piston motor to rotate from a current position toward a target direction to a target position according to a uniform linear stroke.

[0049] Specifically, it is possible to determine whether a brake pedal failure occurs by determining the brake pedal stroke, checking the brake fluid, checking the brake system hardware, checking the electronic control system, or performing a brake performance test. For example, when an emergency brake test is performed in a safe venue, if the braking distance is too long, the vehicle deviates, or shakes during braking, it indicates that a brake pedal failure occurs. For another example, when a diagnostic tool is used to read the fault code of the brake system and a fault related to the electronic control unit or the vacuum booster is checked, it indicates that a brake pedal failure occurs. When a brake pedal failure occurs, the controller will enable the vehicle failure mode. In the failure mode, the piston motor is driven to rotate from the current position to the target direction to the target position according to a uniform linear stroke (i.e., smoothly), thereby pushing the master cylinder piston to stabilize the brake master cylinder and increase the real-time master cylinder pressure of the brake master cylinder, so that the car can safely and smoothly decelerate to a stop state.

[0050] In some embodiments, during the process of driving the piston motor to rotate from the target position in the opposite direction of the target direction to the initial position, if the braking is triggered in response to the brake pedal (i.e., the driver steps on the brake pedal), the driving piston motor stops rotating from the target position in the opposite direction of the target direction to the initial position, and then, the braking stroke and braking force of the brake pedal are obtained, and the braking stroke and braking force are uploaded to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder based on the braking stroke, braking force and driving data.

[0051] As a specific example, Figure 3 As shown, the flowchart of the control method of the braking system of the present invention may include the following steps:

[0052] S301, the piston motor and the master cylinder piston are in an initial state.

[0053] In this step, the piston motor and the master cylinder piston are both in an initial non-operating state, that is, the system is in a standby state, waiting for a braking command.

[0054] S302, determine whether the brake pedal triggers braking. If yes, execute step S303; if not, return to step S301.

[0055] In this step, the system starts to detect whether the brake pedal is stepped on to trigger braking. If the brake pedal is stepped on, the system proceeds to step S303. If the brake pedal is not stepped on, the system continues to remain in the initial state (return to step S301).

[0056] S303, obtaining the braking stroke and braking force of the brake pedal.

[0057] In this step, when the brake pedal is pressed, the system obtains the braking stroke (ie, the distance the pedal is pressed) and the braking force (ie, the force with which the pedal is pressed) of the brake pedal.

[0058] S304: Determine a master cylinder target pressure for the brake master cylinder according to the braking stroke, the braking force and the driving data.

[0059] In this step, the system calculates the target pressure that the brake master cylinder needs to reach based on the braking stroke, braking force and current driving data (such as vehicle speed, load, etc.).

[0060] S305 , driving the piston motor to rotate from the initial position to the target direction to the target position according to the master cylinder target pressure, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure.

[0061] In this step, according to the calculated master cylinder target pressure, the system drives the piston motor to rotate from the initial position until it reaches a position (target position) at which the brake master cylinder can generate the required target pressure.

[0062] S306, determine whether the brake pedal is released. If yes, execute step S307; if not, execute step S308.

[0063] In this step, the system continues to detect the state of the brake pedal. If the brake pedal is released, the system proceeds to step S307. If the brake pedal is still depressed, the system maintains the current state, that is, the pressure of the master cylinder is maintained at the target pressure (execute step S308).

[0064] S307, driving the piston motor to rotate from the target position in the opposite direction of the target direction to the initial position.

[0065] In this step, when the brake pedal is released, the system drives the piston motor to rotate in the opposite direction from the target position until it returns to the initial position, preparing for the next braking operation.

[0066] S308, the real-time master cylinder pressure of the brake master cylinder is maintained at the master cylinder target pressure.

[0067] In this step, if the brake pedal is not released, the system will continue to maintain the pressure of the brake master cylinder at the target pressure to ensure that the vehicle can brake stably.

[0068] In summary, the control method of the brake system according to the embodiment of the present invention includes: in response to the brake pedal triggering the brake, obtaining the brake stroke and the brake force of the brake pedal, and uploading the brake stroke and the brake force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the brake stroke, the brake force and the driving data; obtaining the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and driving the piston motor to rotate from the initial position to the target direction to the target position according to the master cylinder target pressure, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure. Therefore, when the brake pedal is stepped on, the method obtains the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and drives the piston motor to rotate, so that the master cylinder real-time pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the brake idle stroke, reduce the delay of the brake control, and at the same time, prevent the pedal rebound vibration in the anti-lock braking system mode and the energy recovery process, eliminate noise, and do not need to change the original hydraulic brake system, retaining mechanical redundancy and failure backup.

[0069] It should be noted that some embodiments of the present invention are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0070] In some embodiments of the present invention, the sensor 20 is configured to trigger braking in response to the brake pedal 10, obtain the braking stroke and braking force of the brake pedal 10, and upload the braking stroke and braking force to the computing module, so that the computing module determines the master cylinder target pressure for the brake master cylinder 60 based on the braking stroke, braking force and driving data.

[0071] In some embodiments of the present invention, the controller 30 is configured to obtain the real-time master cylinder pressure and the master cylinder target pressure of the brake master cylinder 60, and drive the piston motor 40 to rotate from the initial position to the target position in the target direction according to the master cylinder target pressure; wherein the target position corresponds to the master cylinder target pressure.

[0072] In some embodiments of the present invention, the piston motor 40 is configured to drive the master cylinder piston 50 to squeeze the brake fluid in the master cylinder 60 so that the real-time master cylinder pressure of the master cylinder 60 reaches the master cylinder target pressure.

[0073] In some embodiments of the present invention, the sensor 20 is also configured to send a brake release command to the controller 30 in response to the brake pedal 10 releasing the brake; the controller 30 is also configured to drive the piston motor 40 to rotate from the target position to the initial position in the opposite direction of the target direction in response to receiving the brake release command.

[0074] In some embodiments of the present invention, the sensor 20 is also configured to send a pressure-maintaining instruction to the controller 30 in response to the brake pedal 10 maintaining a triggered braking state within a preset time interval; the controller 30 is also configured to control the piston motor 40 to maintain the target position in response to receiving the pressure-maintaining instruction.

[0075] In some embodiments of the present invention, the sensor 20 is also configured to send a fault command to the controller 30 in response to a brake failure of the brake pedal 10; the controller 30 is also configured to drive the piston motor 40 to rotate from the current position to the target position in a uniform linear stroke in response to receiving the fault command.

[0076] In some embodiments of the present invention, the master cylinder 60 is connected to the brake cylinder through a hydraulic pipeline, and the brake cylinder is connected to the friction plate. When the driver steps on the brake pedal 10, the master cylinder piston 50 in the master cylinder 60 is pushed, and the movement of the master cylinder piston 50 compresses the brake fluid in the master cylinder 60, so that the brake fluid generates pressure, and the oil pressure in the hydraulic pipeline increases. These high-pressure brake fluids are transported to the brake cylinders of each wheel through the hydraulic pipeline (usually composed of copper pipes and rubber hoses). When the high-pressure brake fluid enters the brake cylinder, it will push the piston in the brake cylinder to move outward to push the brake cylinder, so that the brake cylinder pushes the friction plate to contact with the brake disc, slowing down the rotation speed of the wheel and achieving braking.

[0077] It should be noted that for details not disclosed in the braking system of the embodiment of the present invention, please refer to the details disclosed in the control method of the braking system of the embodiment of the present invention, and no further details will be given.

[0078] In summary, the braking system according to the embodiment of the present invention includes a brake pedal, a sensor, a controller, a piston motor, a master cylinder piston and a brake master cylinder; the brake pedal is connected to the sensor, the sensor is connected to the controller, the controller is connected to the piston motor, and the piston motor is connected to the brake master cylinder through the master cylinder piston; the sensor is configured to trigger braking in response to the brake pedal, obtain the braking stroke and braking force of the brake pedal, and upload the braking stroke and braking force to the calculation module, so that the calculation module determines the master cylinder target pressure for the brake master cylinder according to the braking stroke, braking force and driving data; the controller is configured to obtain the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder, and drive the piston motor to rotate from an initial position to a target position in a target direction according to the master cylinder target pressure; wherein the target position corresponds to the master cylinder target pressure; the piston motor is configured to drive the master cylinder piston to squeeze the brake fluid in the brake master cylinder, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure. Therefore, when the brake pedal is depressed, the system obtains the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder, and drives the piston motor to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure. This can solve the problems of invalid stroke and pedal impact feeling in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of braking control, and at the same time, prevent pedal rebound vibration in the anti-lock braking system mode and energy recovery process, eliminate noise, and there is no need to change the original hydraulic braking system, retaining mechanical redundancy and failure backup.

[0079] For the convenience of description, the above system is described by dividing it into various modules according to its functions. Of course, when implementing the present invention, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0080] The system of the above embodiment is used to implement the corresponding method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0081] Corresponding to the above embodiment, refer to Figure 4 , is a block diagram of a car according to some embodiments of the present invention. The present invention also proposes a car 400, including the above-mentioned braking system 410.

[0082] According to the automobile of the embodiment of the present invention, through the above-mentioned braking system, when the brake pedal is pressed, the real-time master cylinder pressure and the target master cylinder pressure of the brake master cylinder are obtained, and the piston motor is driven to rotate so that the real-time master cylinder pressure of the brake master cylinder reaches the target pressure, which can solve the problems of invalid stroke and pedal impact feeling existing in the application of vacuum booster, provide efficient and comfortable braking experience, decouple the brake pedal from the brake master cylinder, eliminate the idle brake stroke, reduce the time delay of braking control, and at the same time, prevent the pedal rebound vibration in the anti-lock braking system mode and the energy recovery process, eliminate noise, and there is no need to change the original hydraulic braking system, retaining mechanical redundancy and failure backup.

[0083] In addition, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. On the contrary, the steps depicted in the flow chart can be performed in a different order. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be decomposed into multiple steps.

[0084] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0085] Although the spirit and principle of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined to benefit, and this division is only for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims. The scope of the attached claims conforms to the broadest interpretation, thereby including all such modifications and equivalent structures and functions.

Claims

1. A method for controlling a braking system, characterized in that: Applied to a braking system, the braking system comprises a brake pedal, a sensor, a controller, a piston motor, a master cylinder piston and a brake master cylinder; the brake pedal is connected to the sensor, the sensor is connected to the controller, the controller is connected to the piston motor, and the piston motor is connected to the brake master cylinder through the master cylinder piston; The method comprises: In response to the brake pedal triggering the brake, obtaining the brake stroke and the brake force of the brake pedal, and uploading the brake stroke and the brake force to a calculation module, so that the calculation module determines a master cylinder target pressure for the brake master cylinder according to the brake stroke, the brake force and the driving data; The master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder are obtained, and the piston motor is driven to rotate from an initial position to a target position in a target direction according to the master cylinder target pressure, so that the master cylinder real-time pressure of the brake master cylinder reaches the master cylinder target pressure.

2. The control method of the brake system according to claim 1, characterized in that: The method further comprises: In response to the brake pedal being released, the piston motor is driven to rotate from the target position to the initial position in a direction opposite to the target direction.

3. The control method of the braking system according to claim 1, characterized in that: The method further comprises: In response to the brake pedal maintaining the braking-triggered state for a preset time interval, the piston motor is controlled to maintain the target position.

4. The control method of the brake system according to claim 1, characterized in that: The method further comprises: In response to a brake failure of the brake pedal, the piston motor is driven to rotate from a current position toward the target direction to the target position according to a uniform linear stroke.

5. A braking system, characterized in that: The invention comprises a brake pedal (10), a sensor (20), a controller (30), a piston motor (40), a master cylinder piston (50) and a brake master cylinder (60); the brake pedal (10) is connected to the sensor (20), the sensor (20) is connected to the controller (30), the controller (30) is connected to the piston motor (40), and the piston motor (40) is connected to the brake master cylinder (60) via the master cylinder piston (50); The sensor (20) is configured to acquire the braking stroke and braking force of the brake pedal (10) in response to the brake pedal (10) triggering braking, and upload the braking stroke and the braking force to a calculation module, so that the calculation module determines a master cylinder target pressure for the brake master cylinder (60) according to the braking stroke, the braking force and driving data; The controller (30) is configured to obtain the master cylinder real-time pressure and the master cylinder target pressure of the brake master cylinder (60), and drive the piston motor (40) to rotate from an initial position to a target position in a target direction according to the master cylinder target pressure; wherein the target position corresponds to the master cylinder target pressure; The piston motor (40) is configured to drive the master cylinder piston (50) to squeeze the brake fluid in the brake master cylinder (60) so that the master cylinder real-time pressure of the brake master cylinder (60) reaches the master cylinder target pressure.

6. The braking system according to claim 5, characterized in that: The sensor (20) is further configured to send a brake release instruction to the controller (30) in response to the brake pedal (10) releasing the brake; The controller (30) is further configured to drive the piston motor (40) to rotate from the target position to the initial position in the opposite direction of the target direction in response to receiving the brake release instruction.

7. The braking system according to claim 5, characterized in that: The sensor (20) is further configured to send a pressure-maintaining instruction to the controller (30) in response to the brake pedal (10) maintaining the braking-triggered state within a preset time interval; The controller (30) is further configured to control the piston motor (40) to maintain the target position in response to receiving the pressure-maintaining instruction.

8. The braking system according to claim 5, characterized in that: The sensor (20) is further configured to send a fault instruction to the controller (30) in response to a brake fault occurring in the brake pedal (10); The controller (30) is further configured to drive the piston motor (40) to rotate from a current position toward the target direction to the target position according to a uniform linear stroke in response to receiving the fault instruction.

9. The braking system according to claim 5, characterized in that: The brake master cylinder (60) is connected to the brake cylinder via a hydraulic pipeline, and the brake cylinder is connected to the friction plate; When the piston motor (40) drives the master cylinder piston (50) to squeeze the brake fluid in the brake master cylinder (60), the oil pressure in the hydraulic pipeline increases to push the brake cylinder, so that the brake cylinder pushes the friction plate to contact the brake disc to achieve braking.

10. An automobile, characterized in that: A braking system (100) comprising any one of claims 5 to 9.

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