CN118254744A - Adjustable braking system, method and vehicle - Google Patents

Abstract

The application provides an adjustable braking system, an adjustable braking method and a vehicle. Through increasing electromechanical braking module in the braking system, utilize hydraulic braking control module and electromechanical braking module to combine together the mode for hydraulic braking control module provides foundation braking based on empty load, and electromechanical braking module provides the reinforcement braking according to actual load, avoids in the related art because the locking pressure of full load design lead to the wheel is lower relatively, very easily reaches locking state and triggers anti-lock system's problem, has reached the effect that can guarantee the braking effect, can avoid the too early locking of wheel again. Thus, driving comfort and driving safety can be improved.

Description

Adjustable braking system, method and vehicle

Technical Field

The application relates to the technical field of automobiles, in particular to an adjustable braking system, an adjustable braking method and an automobile machine.

Background

With the rapid development of the transportation industry, the use of trucks is becoming increasingly popular. Particularly in the industries of logistics, freight transportation and the like, the truck plays a vital role. However, during actual driving, trucks also face some challenges. The braking process of the cargo vehicle is as follows, when a driver presses a brake pedal, the master cylinder booster assembly generates braking hydraulic pressure, and the hydraulic pressure is transmitted to the front and rear brake assemblies through the brake pipeline to generate braking moment, so that the safety and stability of the vehicle are ensured.

However, for trucks, the rear axle is light when empty and heavy when full. In general, a brake system of a vehicle is designed according to a full load state, and the vehicle in an empty load state is easily brought into a locked state and a control hydraulic pressure of an anti-lock brake system (ABS) is triggered due to a relatively low locking pressure of wheels due to a light weight of a rear axle. This situation not only affects the driving experience of the driver, but may also pose a potential threat to driving safety.

Therefore, for this situation, an effective solution is needed to be found, which can ensure the braking effect and avoid the premature locking of the wheels, so as to improve the driving comfort and the driving safety.

Disclosure of Invention

In view of the above, the application provides an adjustable braking system, an adjustable braking method and a vehicle, which can not only ensure the braking effect, but also avoid the premature locking of wheels, and improve the driving comfort and the driving safety.

In a first aspect, the present application provides an adjustable brake system, characterized in that the system comprises an electronic control unit, a load sensor, a hydraulic brake control module and an electromechanical brake module;

The hydraulic brake control module is used for responding to the fact that the actual stroke of the brake pedal is larger than or equal to a first set stroke, outputting brake fluid corresponding to the stroke of the brake pedal based on the mapping relation between the stroke of the brake pedal and the output quantity of the brake fluid, and keeping the brake pressure of wheels at a first set pressure value through a hydraulic brake pipeline; the mapping relation between the stroke of the brake pedal and the output quantity of brake fluid is determined based on the no-load of the vehicle;

The electronic control unit is used for responding to the fact that the actual stroke of the brake pedal is larger than or equal to the first set stroke, acquiring a load signal of the load sensor, and sending a second brake signal to the electromechanical brake module according to the load signal;

the electromechanical brake module is used for responding to the second brake signal and keeping the brake pressure of the vehicle wheel at a second set pressure value through a motor; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

Optionally, the sending a second braking signal to the electromechanical braking module according to the load signal includes:

the electronic control unit determines whether the electronic mechanical reinforcement braking is needed according to the load signal;

When the load signal is larger than a preset load signal, the electronic control unit acquires the braking hydraulic pressure of the hydraulic braking control module, and sends a second braking signal to the electromechanical braking module according to the load signal and the braking hydraulic pressure; the brake fluid pressure of the hydraulic brake control module is generated based on a mapping relationship between brake pedal travel and brake fluid output.

Optionally, the sending a second brake signal to the electromechanical brake module according to the load signal and the brake fluid includes:

the electronic control unit determines a boosting braking grade according to the load signal;

The electronic control unit determines a boosting braking value according to the boosting braking grade and the braking hydraulic pressure;

And the electronic control unit sends a second braking signal to the electromechanical braking module according to the boosting braking value.

Optionally, the maintaining, by the motor, the brake pressure of the vehicle wheel at the first set pressure value in response to the second brake signal includes:

the electromechanical braking module responds to the second braking signal and adjusts the operation parameter of the motor according to the second braking signal;

The motor maintains a brake pressure of the vehicle wheel at the second set pressure value based on the operating parameter.

Optionally, the hydraulic braking control module comprises a hydraulic braking module, the hydraulic braking module and the electronic mechanical braking module are integrated on a hydraulic and electronic mechanical braking integrated brake, and the hydraulic and electronic mechanical braking integrated brake at least comprises a motor, a speed changing mechanism, a screw, a force sensor, an antifriction gasket, a roller bearing, an O-shaped sealing ring, a brake caliper body, a screw sleeve, a piston, a rectangular sealing ring, a dust cover, an inner brake block, a brake disc, a support and an outer brake block.

Optionally, the maintaining, by the motor, the brake pressure of the vehicle wheel at the first set pressure value in response to the second brake signal includes:

The motor responds to the second braking signal to adjust the self rotating speed and torque, and the rotating speed and the torque are transmitted to the screw rod through the speed change mechanism;

the screw rod rotates to drive the screw sleeve to move in a first direction to push the piston, and the piston transmits the pushing force to the inner brake block and transmits the reacting force to the brake inlay;

The brake inlay urges the outer brake pad to clamp against a brake disc to maintain a brake pressure of the vehicle wheel at the first set pressure value.

Optionally, the system further comprises:

the electronic control unit is used for monitoring the speed of each wheel in real time and sending a third braking signal to the electromechanical braking module according to the speed of each wheel;

The electromechanical brake module is configured to maintain a brake pressure of the vehicle wheel at the third set pressure value by an electric motor in response to the third brake signal.

Optionally, the system further comprises a force sensor, and the electronic control unit is further configured to collect pressure data of each wheel force sensor in real time, and send a third braking signal to the electromechanical braking module based on the pressure data of each wheel force sensor.

In a second aspect, the present application provides an anti-lock braking method applied to the adjustable braking system described in all the embodiments of the first aspect, the method comprising:

Responding to the actual stroke of a brake pedal being larger than or equal to a first set stroke, outputting brake fluid corresponding to the stroke of the brake pedal based on the mapping relation between the stroke of the brake pedal and the output quantity of the brake fluid, and keeping the brake pressure of wheels at a first set pressure value through a hydraulic brake pipeline; the mapping relation between the stroke of the brake pedal and the output quantity of brake fluid is determined based on the no-load of the vehicle;

responding to the fact that the actual stroke of a brake pedal is larger than or equal to a first set stroke, acquiring a load signal of a load sensor, and sending a second brake signal to the electromechanical brake module according to the load signal;

maintaining, by the motor, a brake pressure of the vehicle wheel at a second set pressure value in response to the second brake signal; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

In a third aspect, the present application provides a vehicle engine, which includes the adjustable braking system described in the embodiments of the first aspect.

The application provides an adjustable braking system, an adjustable braking method and a vehicle. By adding an electromechanical braking module in a braking system, firstly, a hydraulic braking control module responds to the fact that the actual stroke of a braking pedal is larger than or equal to a first set stroke, and based on the mapping relation between the stroke of the braking pedal and the output quantity of braking fluid, the hydraulic braking control module outputs the braking fluid corresponding to the stroke of the braking pedal, and the braking pressure of wheels is kept at a first set pressure value through a hydraulic braking pipeline; the mapping relation between the stroke of the brake pedal and the output quantity of brake fluid is determined based on the no-load of the vehicle; the rear electronic control unit responds to the fact that the actual stroke of the brake pedal is larger than or equal to the first set stroke, obtains a load signal of the load sensor, and sends a second brake signal to the electronic mechanical brake module according to the load signal; then, the electromechanical brake module responds to a second brake signal, and the brake pressure of the wheels of the vehicle is kept at a second set pressure value through the motor; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal. Therefore, through the mode that the hydraulic braking control module and the electronic mechanical braking module are combined, the hydraulic braking control module provides foundation braking based on no-load, the electronic mechanical braking module provides boosting braking according to actual load, the problem that in the related art, the locking pressure of wheels is relatively low due to full-load design, the locking state is easy to achieve, the anti-lock system is triggered, the braking effect is guaranteed, and the early locking effect of the wheels is avoided. Thus, driving comfort and driving safety can be improved.

Drawings

In order to more clearly illustrate this embodiment or the technical solutions of the prior art, the drawings that are required for the description of the embodiment or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a related art automotive brake system;

Fig. 2 is a schematic structural diagram of an adjustable braking system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an adjustable braking system according to an embodiment of the present application;

Fig. 4 is a control flow chart of an electronic control unit according to an embodiment of the present application;

FIG. 5 is a block diagram of an integrated hydraulic and electromechanical brake according to an embodiment of the present application;

FIG. 6 is a flow chart of an adjustable braking method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a vehicle machine according to an embodiment of the present application.

Detailed Description

As previously indicated, trucks are designed primarily for cargo, and therefore have significant differences in rear axle loading between empty and full conditions. Specifically, the rear axle is light when empty and heavy when full, this difference can have an effect on the braking system, which can apply a corresponding braking force depending on the loading situation due to the light load of the rear axle when empty. However, since the rear wheels are lightly loaded, the braking system may apply too low a braking pressure to the rear wheels, resulting in insufficient braking force and even failing to meet the demand for safe braking. In such cases, the brake pressure may not reach a sufficient level, resulting in an extended braking distance and increased risk of accident. And, when the rear wheel load is light, the braking force applied by the braking system easily exceeds the grip force of the rear wheel, resulting in locking of the rear wheel. Locking the rear wheels can result in loss of control of the vehicle, particularly in situations where the road friction coefficient is low during emergency braking or braking, slip, wander or runaway can occur, increasing the risk of vehicle safety.

Fig. 1 is a schematic structural diagram of a related art automotive brake system. As shown in connection with fig. 1, the vehicle brake system may include a brake pedal 1, a master cylinder booster assembly 2, an ABS hydraulic unit 3, an ABS controller 4, a left front wheel front hydraulic brake 5, a right front wheel front hydraulic brake 6, a left rear wheel hydraulic brake 7, and a right rear wheel hydraulic brake 8. The braking process based on the system specifically comprises the steps that in response to the fact that a brake pedal 1 is pressed, a master cylinder booster 2 assembly generates braking hydraulic pressure, the braking hydraulic pressure is transmitted to a left front wheel front hydraulic brake 5, a right front wheel front hydraulic brake 6, a left rear wheel hydraulic brake 7 and a right rear wheel hydraulic brake 8 through a braking pipeline to generate braking moment, and the braking hydraulic pressures of the left front wheel front hydraulic brake 5, the right front wheel front hydraulic brake 6, the left rear wheel hydraulic brake 7 and the right rear wheel hydraulic brake 8 are basically consistent and are output from the master cylinder booster, but for a truck, the weight of a rear axle in an empty state is light, the locking pressure of the rear wheels is low, the ABS control hydraulic pressure is triggered easily to reach a locking state, and the driving feel is affected.

In view of the above, the present application provides an adjustable braking system, an adjustable braking method and a vehicle. By adding an electromechanical braking module in a braking system, firstly, a hydraulic braking control module responds to the fact that the actual stroke of a braking pedal is larger than or equal to a first set stroke, and based on the mapping relation between the stroke of the braking pedal and the output quantity of braking fluid, the hydraulic braking control module outputs the braking fluid corresponding to the stroke of the braking pedal, and the braking pressure of wheels is kept at a first set pressure value through a hydraulic braking pipeline; the mapping relation between the stroke of the brake pedal and the output quantity of brake fluid is determined based on the no-load of the vehicle; the rear electronic control unit responds to the fact that the actual stroke of the brake pedal is larger than or equal to the first set stroke, obtains a load signal of the load sensor, and sends a second brake signal to the electronic mechanical brake module according to the load signal; then, the electromechanical brake module responds to a second brake signal, and the brake pressure of the wheels of the vehicle is kept at a second set pressure value through the motor; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

Therefore, through the mode that the hydraulic braking control module and the electronic mechanical braking module are combined, the hydraulic braking control module provides foundation braking based on no-load, the electronic mechanical braking module provides boosting braking according to actual load, the problem that in the related art, the locking pressure of wheels is relatively low due to full-load design, the locking state is easy to achieve, the anti-lock system is triggered, the braking effect is guaranteed, and the early locking effect of the wheels is avoided. Thus, driving comfort and driving safety can be improved.

Fig. 2 is a schematic structural diagram of an adjustable braking system according to an embodiment of the present application, and referring to fig. 2, the adjustable braking system according to an embodiment of the present application may include a brake pedal 11, a master cylinder booster assembly 12, an ECU (Electronic Control Unit ) 13, a load sensor 14, an ABS hydraulic unit 16, an ABS controller 16, a front left wheel hydraulic brake 17, a front right wheel hydraulic brake 18, a rear left wheel hydraulic and electromechanical brake 19, and a rear right wheel hydraulic and electromechanical brake 20. In the present embodiment, the electromechanical brake is added to the rear wheel of the vehicle as an example, and in the actual application process, the electromechanical brake may be provided in any combination of the front wheel and the rear wheel of the vehicle as required.

According to the adjustable braking system provided by the embodiment, the braking process can be specifically that the master cylinder booster assembly 12 generates braking hydraulic pressure in response to the pressing of the brake pedal 11, the ECU 13 reads a load signal of the whole vehicle through the load sensor 14 to judge whether the boosting braking is needed, if the boosting braking is needed, the ECU 13 determines the magnitude of the boosting needed by inputting and sends boosting braking signals to the left rear wheel hydraulic pressure and the right rear wheel hydraulic pressure and the electronic mechanical brake 18 through reading the hydraulic signal of the master cylinder booster assembly, the braking hydraulic pressure is transmitted to the left front wheel front hydraulic pressure brake 15, the right front wheel front hydraulic pressure brake 16, the left rear wheel hydraulic pressure and the electronic mechanical brake 17 and the right rear wheel hydraulic pressure and the electronic mechanical brake 18 through the braking pipeline to generate braking moment based on the hydraulic pressure, and meanwhile the electronic mechanical brake of the rear wheel brake receives the boosting braking signal sent by the ECU 13 to perform braking boosting, so that the braking force of the rear wheel is adjustable. In addition, the system provided by the embodiment of the application can quickly and smoothly complete braking moment adjustment by adjusting the input boosting size under the ABS triggering state.

It should be noted that the adjustable brake system connection structure of the present application provides a simplified implementation manner, and aims to solve the adaptability problem of the adjustable brake system under specific situations. This structure is particularly suitable for ABS systems for commercial and residential vehicles, although the brake cylinders are connected in slightly different relationships. For example, commercial vehicles generally select a mode in which a wheel cylinder of a front wheel is braked separately from a wheel cylinder of a wheel in accordance with a higher demand for accuracy of brake pressure control. Therefore, they can be well adapted to the connection relationship of the "front wheel brake assembly" and the "wheel brake assembly" described in the present application. In the case of a civil vehicle, in order to ensure uniform distribution of brake pressure, it is common to connect the left and right front wheels, and the left and right front wheels, respectively, to the master cylinder in a crossed pair. The control structure of the front wheel of the vehicle connected by the X-shaped pipeline is not greatly adjusted on the overall control concept of the adjustable braking system, but the scheme of the application can still be adapted to the ABS system structure of the civil vehicle through a fine tuning structure and a control logic.

In addition, considering that two pressure type braking approaches of hydraulic pressure and pneumatic pressure exist in the traditional ABS system, the hydraulic braking system is a system for transmitting pressure by using brake oil, the brake oil is compressed by the force transmitted by a brake pedal to generate brake pressure and then is transmitted to wheel brakes by a brake pipeline, so that braking is realized, and the pneumatic booster braking system is used for assisting braking by utilizing negative pressure generated by a vacuum pump or a vacuum booster, so that a driver is helped to apply larger braking force, but the two pressure type braking systems are not essentially different from the braking principle in a pipeline connection mode, so that the application is introduced by taking a hydraulic braking system which is more widely used in the traditional vehicle type as an example. This does not mean that the solution according to the application is not applicable after replacement of the pressure-conducting medium in the ABS system.

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Fig. 3 is a schematic structural diagram of an adjustable braking system according to an embodiment of the present application. In connection with the adjustable brake system shown in fig. 3, an embodiment of the present application provides that the adjustable brake system may include a hydraulic brake control module 21, an electronic control unit 22, a load sensor 23, and an electromechanical brake module 24.

The hydraulic brake control module 23 is configured to output brake fluid corresponding to a brake pedal stroke based on a mapping relationship between the brake pedal stroke and a brake fluid output amount in response to the brake pedal actual stroke being equal to or greater than a first set stroke, and maintain a brake pressure of wheels at a first set pressure value through a hydraulic brake line.

Hydraulic braking is a way to transfer energy using hydraulic pressure to effect braking. In a hydraulic brake system, a brake pedal transmits force through a piston connected to a master cylinder to generate pressure on brake fluid in the master cylinder, thereby pushing the fluid into a brake to achieve braking.

Specifically, during braking, the driver depresses the brake pedal, and the master cylinder piston advances to push the brake fluid out of the master cylinder to the brake. The piston end in the brake is pressed by the brake liquid and acts on the other end, so that the brake lining in the brake clamps the brake drum shell to brake.

An anti-lock brake system (ABS) refers to an automotive braking system that aims to prevent wheels from being completely locked and losing grip during braking. Conventional braking systems may cause the wheels to lock up when the vehicle is braked suddenly, thereby disabling the steering ability of the vehicle. The ABS system ensures that the driver is still able to steer the vehicle by monitoring the speed of each wheel and adjusting the brake pressure when the wheel is about to lock, keeping the wheel rotating and in contact with the ground.

In this embodiment, the truck takes into account its prevailing use situation, typically for loading, which means that the pressure to which the rear axle of the vehicle is subjected increases in a fully loaded state, in which the possibility of locking the rear wheels is higher, and thus the ABS system is typically designed to intervene more aggressively in this situation. However, in an unloaded condition, the pressure of the rear wheel is low, which may cause the ABS system to be too sensitive under light load, easily triggering locking. In this case, there may be problems such as an increase in the braking distance of the vehicle, an out of control of the vehicle, and the like.

Therefore, in the present embodiment, the map between the brake pedal stroke and the brake fluid output amount is first established based on the vehicle no-load. The purpose is to provide foundation braking for the vehicle based on the use of the hydraulic brake control module 23.

Specifically, the hydraulic brake control module 23 monitors the stroke of the brake pedal in real time. This task is typically accomplished by a sensor or similar device. When the stroke of the brake pedal reaches a certain level, the hydraulic brake control module 23 starts to respond, based on the mapping relationship between the stroke of the brake pedal and the output amount of brake fluid, the hydraulic brake control module 23 determines the amount of brake fluid to be output according to the monitored stroke of the brake pedal, and once the amount of brake fluid to be output is determined, the hydraulic brake control module 23 controls the output of brake fluid through a hydraulic control unit or a similar mechanism, for example, by adjusting a hydraulic pump or a hydraulic valve.

Further, the output brake fluid is transmitted to the brakes of the respective wheels through the hydraulic brake lines. At the brake, the brake fluid applies pressure to bring the brake pads or drums into contact with the wheels, thereby decelerating the vehicle. The system is required to ensure that the brake pressure of the wheel is maintained at the first set pressure value by monitoring the brake pressure of the wheel and adjusting the brake fluid output accordingly.

Since the basis of the hydraulic braking in this embodiment is designed based on the empty load, the anti-lock function of the vehicle is not easily activated when the empty vehicle is braked by the hydraulic brake control module 23.

The electronic control unit 22 is configured to obtain a load signal of the load sensor in response to the actual stroke of the brake pedal being greater than or equal to the first set stroke, and send a second brake signal to the electromechanical brake module according to the load signal.

As described above, the hydraulic brake control module is designed according to the empty load of the vehicle, in which case the brake system may not provide sufficient braking force when the vehicle is fully loaded, resulting in problems of excessively long braking distance or poor braking effect. Therefore, in the embodiment, the vehicle can be boosted and braked according to the load signal by acquiring the real-time load of the vehicle, and the supplementary hydraulic braking control module fails to provide complete braking force after being designed based on the no-load, so that the vehicle can brake according to the braking force corresponding to the pedal stroke.

Specifically, the electronic control unit monitors the stroke of the brake pedal to determine the driver's braking intent. When the stroke of the brake pedal is larger than or equal to the first set stroke, the electronic control unit can acquire a load signal from the load sensor. Load sensors are typically mounted on the suspension system or chassis structure of the vehicle for detecting the actual load conditions of the vehicle, i.e. the weight the vehicle is subjected to. According to the obtained load signal, the electronic control unit calculates a corresponding braking control strategy and sends a second braking signal to the electromechanical braking module. This signal will control the electromechanical braking module to apply the corresponding braking force to achieve the optimal braking effect.

In an alternative embodiment, the electronic control unit determines that there are a plurality of possible implementations of the second brake signal, for example determining the second brake signal directly from the load signal or dividing the level of the boost brake from the load signal, determining the second brake signal based on different levels. Therefore, fig. 4 is a control flow chart of an electronic control unit according to an embodiment of the application. As shown in connection with fig. 4, sending a second braking signal to the electromechanical braking module based on the load signal may include:

s401, the electronic control unit determines whether the electronic mechanical reinforcement braking is needed according to the load signal.

In this embodiment, the ecu compares the current load with a preset threshold or reference value to determine whether electromechanical brake boosting is required. In an alternative embodiment, the empty load signal of the vehicle may be set to the preset load signal.

Specifically, when the load signal is equal to or less than the preset load signal, it generally means that the vehicle is lightly loaded, and at this time, no electromechanical boosting braking is required; when the load signal is greater than the preset load signal, which indicates that the vehicle is heavily loaded, it may be necessary to increase the braking effort to accommodate this situation. The intelligent braking system design can be correspondingly adjusted according to actual load conditions so as to ensure that the vehicle can provide safe and effective braking effect under various conditions.

By monitoring the actual load condition, the vehicle is ensured to provide proper braking force under different load states, the driving safety and the driving comfort are improved, and the service life of a braking system is prolonged.

And S402, when the load signal is larger than a preset load signal, the electronic control unit acquires the braking hydraulic pressure of the hydraulic braking control module, and sends a second braking signal to the electronic mechanical braking module according to the load signal and the braking hydraulic pressure.

In this embodiment, the brake fluid pressure of the hydraulic brake control module is generated based on a map relationship between a brake pedal stroke and a brake fluid output amount. When the load signal is greater than the preset load signal, that is, the electromechanical boosting brake is required, since in the present brake system, the hydraulic brake control module already provides a part of the brake pressure, the electronic control unit needs to acquire the brake hydraulic pressure of the hydraulic brake control module first, determine the brake force generated by the hydraulic brake control module by analyzing the brake hydraulic pressure of the hydraulic brake control module, then determine a second brake signal at the acquired corresponding load signal and brake hydraulic pressure and send the second brake signal to the electromechanical brake module, so that the electromechanical brake module realizes the boosting brake.

In an alternative embodiment, in order that the electronic control unit can control the force of the boost braking more precisely, ensuring safety and efficiency, the sending the second braking signal to the electromechanical braking module according to the load signal and the braking fluid comprises: the electronic control unit determines the boosting braking grade according to the load signal; the electronic control unit determines a boosting braking value according to the boosting braking grade and the braking hydraulic pressure; the electronic control unit sends a second braking signal to the electromechanical braking module according to the boosting braking value.

Specifically, if the force-increasing braking is required, the electronic control unit classifies or ranks the force-increasing magnitude according to the load of the vehicle so as to accurately control the braking force to meet the requirements of different situations. After determining the boost level, the electronic control unit determines the desired boost level based on the read master cylinder booster assembly hydraulic signal. The relation between the two steps is that the step of judging the reinforcement level is to classify or grade the braking force, so that the reinforcement level can be adjusted in a targeted manner according to the current situation of the vehicle and the requirement of the braking force when the actually required reinforcement level is determined. In other words, the boost level is determined to take into account the different levels of braking demand when determining the boost level so that the electronic control unit can more precisely control the braking effort, ensuring safety and efficiency.

For example, the electronic control unit reads the load signal of the whole vehicle through the load sensor, judges that the boosting braking is needed, and classifies the boosting grades into three grades according to the current situation: high, medium, low.

If the current situation is that high-level boost braking is required, the ECU reads the hydraulic signal of the master cylinder booster assembly and determines the specific boost level required according to the signal. In this case, it is possible that the hydraulic signal indicates that the greatest degree of braking effort is required to cope with an emergency situation or steep incline. Thus, the ECU will increase the brake pressure accordingly to provide the high level of boost required.

Conversely, if only a low level of boost braking is required in the present situation, the ECU will determine a smaller boost level based on the read hydraulic signal. This may mean that the vehicle is traveling on a gentle road, requiring only a slight braking effort to maintain speed or slow down. Thus, the ECU will adjust the brake system to provide a suitably low level of boost to avoid over-braking or unnecessary stopping of the vehicle.

Through the process, the ECU can accurately control the braking system according to the current reinforcement level and the read hydraulic signals so as to meet the braking requirements under different driving conditions and ensure driving safety and comfort.

And an electromechanical braking module 23 for maintaining the braking pressure of the vehicle wheel at a second set pressure value by the motor in response to a second braking signal.

In this embodiment, the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

In an alternative embodiment, maintaining the brake pressure of the vehicle wheel at the first set pressure value by the motor in response to the second brake signal comprises: the electromechanical braking module responds to the second braking signal and adjusts the operation parameter of the motor according to the second braking signal; the motor maintains a brake pressure of the vehicle wheel at the first set pressure value based on the operating parameter.

In this embodiment, the ECU sends a second brake signal to the motor controller, the second brake signal possibly including information about the power output, the rotational speed requirement, etc. of the motor. After receiving the second braking signal sent by the ECU, the motor controller analyzes the signal content, processes the signal according to a set control algorithm and determines the operation parameters required by the motor. According to the analyzed signal content and the control algorithm, the motor controller can adjust parameters such as current, voltage and the like of the motor, control the rotating speed, torque or power output of the motor, and keep the braking pressure of the wheels of the vehicle at the second set pressure value.

Therefore, the boosting braking is realized by the electromechanical braking module, and the braking force can be dynamically adjusted according to the actual load condition, so that the vehicle can provide proper braking effect under different load conditions, thereby enhancing the driving safety and reducing the possibility of accidents.

In an alternative embodiment, the hydraulic brake control module comprises a hydraulic brake module, the hydraulic brake module and the electro-mechanical brake module being integrated on a hydraulic and electro-mechanical brake integrated brake. Fig. 5 is a block diagram of a hydraulic and electromechanical integrated brake according to an embodiment of the present application. As shown in fig. 5, the hydraulic and electromechanical integrated brake may include a motor 1, a gear mechanism 2, a screw 3, a force sensor 4, an antifriction pad 5, a roller bearing 6, an O-ring 7, a caliper body 8, a threaded sleeve 9, a piston 10, a rectangular ring 11, a dust cover 12, an inner brake pad 13, a brake disc 14, a bracket 15, and an outer brake pad 16.

In connection with the integrated hydraulic and electromechanical brake illustrated in fig. 5, wherein the specific process of braking the hydraulic brake module may include transmitting brake hydraulic pressure generated in response to the master cylinder booster assembly to the integrated hydraulic and electromechanical brake through the brake line, the hydraulic brake related structure maintaining the brake pressure of the vehicle wheels at the first set pressure value.

In connection with the hydraulic and electromechanical integrated brake shown in fig. 5, the specific braking process of the electromechanical braking module may include that the motor 1 adjusts its own rotational speed and torque in response to the second braking signal, and the rotational speed and torque are transmitted to the screw 3 through the speed change mechanism 2; the screw rotation 3 drives the screw sleeve 9 to move in a first direction to push the piston 10, and the piston 10 transmits the pushing force to the inner brake block 13 and transmits the reacting force to the brake inlay 8; the brake inlay 8 pushes the outer brake pad 16 to clamp the brake disc 14 to maintain the brake pressure of the vehicle wheel at the second set pressure value.

In an alternative embodiment, the hydraulic brake antilock system is described above to increase the braking effectiveness and handling and driving safety by monitoring the rotational speed of the wheels in real time and by controlling the adjustment of the brake pressure to prevent the wheels from locking and slipping. However, ABS systems operate to cause a pulsing feel to the brake pedal, as the system rapidly applies and releases brake pressure to prevent wheel locking. Such a feeling may cause the driver to feel uncomfortable or unaccustomed, affecting the driving comfort. Therefore, in the embodiment of the application, the ABS triggering can be realized by adjusting the output size of the electromechanical brake module, and the electromechanical brake control reaction is faster, so that the safety is higher, the whole vehicle reaction is small, and the driving feeling of the ABS triggering can be improved.

In an embodiment of the present application, the system further includes: the electronic control unit is used for monitoring the speed of each wheel in real time and sending a third braking signal to the electromechanical braking module according to the speed of each wheel; the electromechanical brake module is configured to maintain a brake pressure of the vehicle wheel at the third set pressure value by an electric motor in response to the third brake signal.

In this embodiment, the electronic control unit detects the impending locking of the wheel by means of a sensor. These sensors are typically mounted near each wheel and can monitor the speed and rotation of the wheel. When the wheel is about to lock, its speed may suddenly drop or the speed difference from other wheels may increase significantly. It should be noted that the process may also be implemented by an ABS system. The electronic control unit or the ABS system can send instructions to the electromechanical brake, and the output size of the motor is required to be adjusted, and the braking force of the wheels is increased or reduced by increasing or decreasing the output torque and the rotating speed of the motor or adjusting other related parameters. The adjustment is real-time and dynamic, and can be accurately controlled according to the locking degree of the wheel and the driving condition so as to ensure the stability and controllability of the vehicle during braking.

The ABS system can control braking force more quickly by adjusting the output of the electromechanical brake, so that the reaction time of the whole automobile is reduced, and the driving feel is improved. The driver can feel more stable and controllable during braking, excessive braking force and braking pulse feeling are avoided, and driving comfort and safety are improved.

In combination with the hydraulic and electromechanical integrated brake shown in fig. 5, the system further includes force sensors, and the electronic control unit is further configured to collect pressure data of each wheel force sensor in real time, and send a third braking signal to the electromechanical braking module based on the pressure data of each wheel force sensor.

In this embodiment, each wheel is typically provided with a force sensor for monitoring the braking pressure conditions of the wheel. These sensors will send brake pressure data of the wheels to the ECU in real time. The ECU is a control unit responsible for managing the entire ABS system. It receives and processes data from the wheel force sensors in real time as well as data from other sensors, such as a vehicle speed sensor, etc. When the ECU detects that a wheel is about to lock, it calculates an appropriate braking force based on the collected data and then sends a third braking signal to the electro-mechanical braking module. This signal tells the brake module to adjust the magnitude of the brake output to achieve accurate control of the braking effort. After the electromechanical brake module receives the third brake signal, the output size of the brake is adjusted accordingly. Such adjustment is typically accomplished by increasing or decreasing the output torque of the motor to increase or decrease the braking effort of the wheel.

In general, the ECU collects pressure data of the wheel force sensors in real time and transmits a third brake signal based on the data, so that the ABS system can take measures rapidly when the wheels are about to lock, and maintain stability and controllability of the vehicle.

In summary, in the embodiment of the application, by combining the hydraulic braking control module and the electromechanical braking module, the hydraulic braking control module provides basic braking based on no-load, and the electromechanical braking module provides boosting braking according to actual load, so that the problem that in the related art, the locking pressure of the wheels is relatively low due to full-load design, the locking state is easy to be achieved, and the anti-lock system is triggered is solved, and the effects of ensuring braking effect and avoiding premature locking of the wheels are achieved. Thus, driving comfort and driving safety can be improved.

The embodiments of the present application provide some specific implementations of an adjustable braking system, and based on this, the present application also provides a corresponding method. The anti-lock braking method according to the embodiment of the present application will be described in terms of the method.

Referring to a flowchart of an anti-lock braking method shown in fig. 6, an anti-lock braking method provided by an embodiment of the present application may include:

s601, outputting brake fluid corresponding to the brake pedal stroke based on a mapping relation between the brake pedal stroke and the brake fluid output quantity in response to the brake pedal actual stroke being equal to or larger than a first set stroke, and maintaining the brake pressure of the wheels at a first set pressure value through a hydraulic brake pipeline.

Wherein the mapping between brake pedal travel and brake fluid output is determined based on the vehicle no-load. The specific implementation process refers to the above, and will not be described herein.

S602, responding to the fact that the actual stroke of the brake pedal is larger than or equal to the first set stroke, acquiring a load signal of a load sensor, and sending a second brake signal to the electronic mechanical brake module according to the load signal.

S603, responding to a second braking signal, and keeping the braking pressure of the wheels of the vehicle at a second set pressure value through a motor; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

Fig. 7 is a schematic diagram of a vehicle machine according to an embodiment of the present application. As shown in connection with fig. 7, the vehicle 700 includes an adjustable brake system as described above.

The embodiment of the application also provides corresponding equipment and a computer storage medium, which are used for realizing the scheme provided by the embodiment of the application.

The device comprises a memory and a processor, wherein the memory is used for storing instructions or codes, and the processor is used for executing the instructions or codes so as to enable the device to execute the anti-lock braking method according to any embodiment of the application.

The computer storage medium stores codes, and when the codes are executed, the device for executing the codes realizes the anti-lock braking method according to any embodiment of the application.

The "first" and "second" in the names of "first", "second" (where present) and the like in the embodiments of the present application are used for name identification only, and do not represent the first and second in sequence.

From the above description of embodiments, it will be apparent to those skilled in the art that all or part of the steps of the above described example methods may be implemented in software plus general hardware platforms. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a read-only memory (ROM)/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a router) to perform the method according to the embodiments or some parts of the embodiments of the present application.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the device embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

The foregoing description of the exemplary embodiments of the application is merely illustrative of the application and is not intended to limit the scope of the application.

Claims (10)

1. An adjustable braking system is characterized by comprising an electronic control unit, a load sensor, a hydraulic braking control module and an electronic mechanical braking module;

The hydraulic brake control module is used for responding to the fact that the actual stroke of the brake pedal is larger than or equal to a first set stroke, outputting brake fluid corresponding to the stroke of the brake pedal based on the mapping relation between the stroke of the brake pedal and the output quantity of the brake fluid, and keeping the brake pressure of wheels at a first set pressure value through a hydraulic brake pipeline; the mapping relation between the stroke of the brake pedal and the output quantity of brake fluid is determined based on the no-load of the vehicle;

The electronic control unit is used for responding to the fact that the actual stroke of the brake pedal is larger than or equal to the first set stroke, acquiring a load signal of the load sensor, and sending a second brake signal to the electromechanical brake module according to the load signal;

the electromechanical brake module is used for responding to the second brake signal and keeping the brake pressure of the vehicle wheel at a second set pressure value through a motor; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

2. The adjustable brake system according to claim 1, wherein said transmitting a second brake signal to said electromechanical brake module in accordance with said load signal comprises:

the electronic control unit determines whether the electronic mechanical reinforcement braking is needed according to the load signal;

When the load signal is larger than a preset load signal, the electronic control unit acquires the braking hydraulic pressure of the hydraulic braking control module, and sends a second braking signal to the electromechanical braking module according to the load signal and the braking hydraulic pressure; the brake fluid pressure of the hydraulic brake control module is generated based on a mapping relationship between brake pedal travel and brake fluid output.

3. The adjustable brake system according to claim 2, wherein said transmitting a second brake signal to said electromechanical brake module based on said load signal and said brake fluid comprises:

the electronic control unit determines a boosting braking grade according to the load signal;

The electronic control unit determines a boosting braking value according to the boosting braking grade and the braking hydraulic pressure;

And the electronic control unit sends a second braking signal to the electromechanical braking module according to the boosting braking value.

4. The adjustable brake system of claim 1, wherein said maintaining the brake pressure of the vehicle wheel at the first set pressure value by the motor in response to the second brake signal comprises:

the electromechanical braking module responds to the second braking signal and adjusts the operation parameter of the motor according to the second braking signal;

The motor maintains a brake pressure of the vehicle wheel at the second set pressure value based on the operating parameter.

5. The adjustable brake system of claim 1, wherein the hydraulic brake control module comprises a hydraulic brake module, the hydraulic brake module and the electro-mechanical brake module being integrated on a hydraulic and electro-mechanical brake integrated brake, the hydraulic and electro-mechanical brake integrated brake comprising at least a motor, a speed change mechanism, a screw, a force sensor, an antifriction pad, a roller bearing, an O-ring, a brake caliper, a screw sleeve, a piston, a rectangular ring, a dust cover, an inner brake pad, a brake disc, a bracket, an outer brake pad.

6. The adjustable brake system according to claim 5, wherein said maintaining the brake pressure of the vehicle wheel at the first set pressure value by the motor in response to the second brake signal comprises:

The motor responds to the second braking signal to adjust the self rotating speed and torque, and the rotating speed and the torque are transmitted to the screw rod through the speed change mechanism;

the screw rod rotates to drive the screw sleeve to move in a first direction to push the piston, and the piston transmits the pushing force to the inner brake block and transmits the reacting force to the brake inlay;

The brake inlay urges the outer brake pad to clamp against a brake disc to maintain a brake pressure of the vehicle wheel at the first set pressure value.

7. The adjustable brake system according to claim 1, wherein the system further comprises:

the electronic control unit is used for monitoring the speed of each wheel in real time and sending a third braking signal to the electromechanical braking module according to the speed of each wheel;

The electromechanical brake module is configured to maintain a brake pressure of the vehicle wheel at the third set pressure value by an electric motor in response to the third brake signal.

8. The adjustable brake system according to claim 7, further comprising force sensors, wherein the electronic control unit is further configured to collect pressure data for each wheel force sensor in real time, and send a third brake signal to the electro-mechanical brake module based on the pressure data for each wheel force sensor.

9. An anti-lock braking method applied to an adjustable braking system according to any one of claims 1 to 8, the method comprising:

Responding to the actual stroke of a brake pedal being larger than or equal to a first set stroke, outputting brake fluid corresponding to the stroke of the brake pedal based on the mapping relation between the stroke of the brake pedal and the output quantity of the brake fluid, and keeping the brake pressure of wheels at a first set pressure value through a hydraulic brake pipeline; the mapping relation between the stroke of the brake pedal and the output quantity of brake fluid is determined based on the no-load of the vehicle;

responding to the fact that the actual stroke of a brake pedal is larger than or equal to a first set stroke, acquiring a load signal of a load sensor, and sending a second brake signal to the electromechanical brake module according to the load signal;

maintaining, by the motor, a brake pressure of the vehicle wheel at a second set pressure value in response to the second brake signal; the second set pressure value is a brake pressure corresponding to an actual stroke of the brake pedal under the load signal.

10. A vehicle comprising an adjustable brake system according to any one of claims 1-8.