Intelligent decoupling brake system

Abstract

An intelligent decoupling brake system includes a controller and an actuator, the actuator includes an oil tank, a pedal master cylinder, a pedal simulator, a pressure building module and an ESC module, the oil tank is used to store brake fluid, the pedal master cylinder is connected with the oil tank, the oil tank provides brake fluid to the pedal master cylinder through a pipeline, two output ends of the pedal master cylinder are connected with the ESC module through pipeline one and pipeline two respectively, characterized in that: a loop isolation valve is arranged on the pipeline one and the pipeline two, the pedal simulator is connected with the oil tank and the pipeline one respectively, a pipeline three is arranged between the pressure building module and the oil tank and connected with the oil tank through the pipeline three, the loop isolation valve can accurately control the flow direction of the brake fluid, effectively prevent the backflow of the brake fluid in unnecessary cases, and ensure the stability and reliability of the brake system. The pedal simulator can simulate the real pedal feeling by connecting with the oil tank and the pipeline one, and provide more comfortable and accurate brake feedback for the driver. The pressure building module is connected with the oil tank through the pipeline three, which can quickly establish brake pressure when needed, and ensure the rapid response of the brake system.

Description

Technical Field

[0001] This utility model relates to the field of intelligent decoupling technology, specifically to an intelligent decoupling braking system. Background Technology

[0002] The intelligent decoupled braking system supports pedal feel adjustment and efficient brake energy recovery. When used in conjunction with ESC, it enables more powerful system functions. One type of intelligent decoupled braking system provides braking pressure to all wheels, while ESC handles individual wheel braking force adjustment and pressure control, serving as backup in case of failure and meeting the redundancy requirements of advanced autonomous driving. Summary of the Invention

[0003] In view of this, the present invention provides an intelligent decoupling braking system.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An intelligent decoupled braking system includes a reservoir, an ESC module, an actuator, and a controller. The actuator is connected to both the reservoir and the ESC module, and the actuator communicates with the controller. The actuator includes a valve body and a one-way valve assembly, a solenoid valve assembly, and a sensor assembly mounted on the valve body. The one-way valve assembly is fixed inside the valve body by riveting, and the solenoid valve assembly is fixed to the valve body by pre-pressurization.

[0005] Preferably, the actuator further includes a pressure build-up module, a master cylinder, and a pedal simulator, and the solenoid valve group includes a CSV valve, a PSV valve, an SSV valve, a TSV valve, and a POV valve, wherein two of each of the CSV valve and PSV valve are provided.

[0006] Preferably, the actuator has an energy recovery state. In the energy recovery state, the pedal master cylinder senses the pedal displacement and pedal displacement speed and transmits them to the pedal simulator. The pedal simulator converts the received pedal displacement and pedal displacement speed into corresponding electrical signals and transmits them to the controller. The controller controls the actuator to close the PSV valve according to the received electrical signals and outputs an electrical signal to the vehicle controller. The vehicle controller controls the vehicle drive motor to stop supplying power, and uses the inertia of the wheels to drive the motor to rotate, so the motor becomes a generator and generates current.

[0007] Preferably, the actuator has a boost pressure state. In the boost pressure state, the CSV valve is closed, the SSV valve is open, the pedal simulator simulates pedal force, and the pedal position sensor outputs a curve to the controller based on the magnetic strip displacement speed and displacement amount. The controller outputs an electronic control signal to the pressure building module. Upon receiving the electronic control signal, the pressure building module responds by increasing the pressure in the braking system. Under high pressure, the brake fluid flows more efficiently to the ESC module through the pipeline. The ESC module distributes the braking force to each wheel according to the controller's instructions.

[0008] Preferably, the actuator has a failover backup state, in which the ESC module is directly connected to the oil reservoir, and the ESC module utilizes the braking pressure directly provided by the oil reservoir.

[0009] Preferably, the actuator has a self-detection function for internal leaks. In the self-detection state, SSV, CSV2, TSV, and OV are in the off state, and POV is turned on to supply liquid; when pressure is built up, POV is turned off, the pressure sensor detects pressure changes and transmits the output curve to the controller, which determines whether there is an internal leak.

[0010] Preferably, the actuator has a self-detection function for internal leaks. In the self-detection state, the PSV is closed and the POV is opened to supply liquid; during pressure build-up, the POV is closed, the pressure sensor detects pressure changes and transmits the output curve to the controller, which determines whether an internal leak exists.

[0011] Preferably, the pressure building module includes a motor and a plunger. The motor drives the plunger to perform reciprocating linear motion within the cylinder to achieve the intake and discharge of brake fluid.

[0012] The beneficial effects of this invention are as follows: By setting up an intelligent decoupled braking system, precise distribution and dynamic adjustment of braking force can be achieved, improving the response speed and stability of the braking system. The controller in this system analyzes and calculates the optimal braking force required for each wheel in real time based on the vehicle's driving status and the driver's operating intentions, and then sends commands to the actuators. The solenoid valve assembly in the actuators precisely controls the flow direction and flow rate of the brake fluid according to the controller's commands, thereby achieving independent braking control for different wheels. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Appendix Figure 1 This is a hydraulic schematic diagram of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] This utility model provides the following technical solution: As attached Figure 1 As shown, this utility model discloses an intelligent decoupled braking system, including a reservoir 1, an ESC module 2, an actuator 3, and a controller (not shown). The actuator 3 is connected to both the reservoir 1 and the ESC module 2, and is communicatively connected to the controller. The actuator 3 includes a valve body and a one-way valve assembly, a solenoid valve assembly, and a sensor assembly mounted on the valve body. The one-way valve assembly is riveted to the inside of the valve body, and the solenoid valve assembly is pre-pressurized and fixed to the valve body. Specifically, the ESC module 2 can utilize existing technology, which will not be elaborated here. By setting up an intelligent decoupled braking system, precise distribution and dynamic adjustment of braking force can be achieved, improving the response speed and stability of the braking system. The controller in this system analyzes and calculates the optimal braking force required for each wheel in real time based on the vehicle's driving status and the driver's operating intentions, and then issues commands to the actuator 3. The solenoid valve assembly in the actuator 3 precisely controls the flow direction and flow rate of the brake fluid according to the controller's commands, thereby achieving independent braking control for different wheels.

[0018] Furthermore, the actuator 3 also includes a pressure-building module 4, a master cylinder 5, and a pedal simulator 6. The solenoid valve group includes a CSV valve, a PSV valve, an SSV valve, a TSV valve, and a POV valve, wherein two CSV valves and two PSV valves are provided. Specifically, in this embodiment, the pressure-building module 4 is connected to the oil reservoir 1 to quickly build up the required hydraulic pressure during braking to achieve efficient braking. The pedal simulator 6 is mechanically connected to the master cylinder 5 and interacts with the controller via electrical signals, accurately simulating the force and travel feedback when the driver presses the brake pedal, providing the driver with a realistic and comfortable braking feel. The CSV valve and PSV valve are respectively located in the key hydraulic circuit of the actuator 3. The two CSV valves work together to precisely control the flow direction and flow rate of brake fluid under different braking conditions, ensuring the stability of the braking system; the two PSV valves are mainly used to adjust the pressure balance of the braking system to prevent problems such as brake failure caused by abnormal pressure. The SSV valve, TSV valve, and POV valve each have their own unique hydraulic control functions. They work together with the solenoid valve group and sensor group to enable the entire intelligent decoupled braking system to adjust the braking strategy in real time and accurately according to the vehicle's driving status, the driver's operating intention, and road conditions, thereby achieving intelligent braking control.

[0019] Furthermore, the actuator 3 has an energy recovery state. In this state, the pedal master cylinder 5 senses the pedal displacement and speed and transmits them to the pedal position sensor. The pedal position sensor converts the received pedal displacement and speed into corresponding electrical signals and transmits them to the controller. The controller, based on the received electrical signals, controls the actuator to close the PSV valve and outputs an electrical signal to the vehicle controller. The vehicle controller then controls the vehicle drive motor to stop supplying power, using the inertia of the wheels to rotate the motor, which then becomes a generator, producing current. Specifically, in this embodiment, when the vehicle is in a deceleration or downhill condition where energy recovery is possible, the intelligent decoupled braking system automatically switches to energy recovery mode. In this mode, the pedal master cylinder senses the displacement and speed of the driver pressing the brake pedal in real time and quickly transmits this information to the pedal simulator. The pedal simulator, with its high-precision sensors and advanced signal processing technology, accurately converts the received mechanical displacement information into corresponding electrical signals and then transmits them quickly and stably to the controller. Upon receiving these electrical signals, the controller quickly makes a judgment based on a pre-set algorithm and program and controls the actuator to close the PSV valve. Simultaneously, the controller outputs an electrical signal to the vehicle controller. Upon receiving the signal, the vehicle controller immediately stops supplying power to the vehicle's drive motor. At this point, the wheels continue to rotate due to inertia, thus driving the motor to rotate. During this rotation, the motor becomes a generator, converting the vehicle's kinetic energy into electrical energy, achieving energy recovery and reuse, improving the vehicle's energy efficiency, and reducing energy consumption.

[0020] Furthermore, the actuator 3 has a booster mode. In this booster mode, the CSV valve is closed, the SSV valve is open, the pedal simulator 6 simulates pedal force, and the pedal position sensor outputs a curve to the controller based on the magnetic strip displacement speed and displacement amount. The controller outputs an electronic control signal to the pressure-building module 4. Upon receiving the electronic control signal, the pressure-building module 4 responds by increasing the pressure within the braking system. Under high pressure, the brake fluid flows more efficiently to the ESC module 2 through the pipeline. The ESC module 2 distributes the braking force to each wheel according to the controller's instructions. Specifically, in this embodiment, when the vehicle requires additional braking assistance, such as emergency braking after rapid acceleration or heavy-load uphill braking, the intelligent decoupled braking system automatically switches to booster mode. In this mode, the system first closes the CSV valve to block a specific hydraulic circuit to prevent pressure leakage; simultaneously, it opens the SSV valve to ensure smooth brake fluid flow. The pedal simulator 6 accurately simulates the corresponding pedal force feedback based on the force and speed at which the driver depresses the brake pedal, allowing the driver to experience a realistic and linear braking response. The pedal position sensor monitors the pedal's displacement speed and amount in real time, converting this data into curves and outputting them to the controller. Upon receiving the sensor signal, the controller combines this data with current vehicle driving parameters, such as vehicle speed and engine speed, to calculate the required boost pressure. Subsequently, the controller outputs a precise electronic control signal to the pressure-building module 4. Upon receiving the signal, the pressure-building module 4 responds immediately, increasing the pressure within the braking system to allow the brake fluid to flow more efficiently to the ESC module 2 under high pressure. The ESC module 2, according to the controller's instructions, intelligently distributes the braking force to each wheel, ensuring the vehicle receives sufficient braking force while maintaining optimal braking balance and stability.

[0021] Furthermore, the actuator 3 has a fail-safe backup state. In this fail-safe backup state, the ESC module 2 is directly connected to the reservoir 1, and the ESC module 2 utilizes the braking pressure directly provided by the reservoir 1. Specifically, in this embodiment, when certain key components of the intelligent decoupled braking system, such as the sensor group or solenoid valve group, malfunction, causing the system to be unable to perform intelligent braking control normally, the system will automatically switch to fail-safe backup mode. In this mode, the ESC module 2 is directly connected to the reservoir 1, bypassing the potentially faulty actuator 3, and utilizes the braking pressure directly provided by the reservoir 1 to maintain basic braking function. This design ensures that even in the event of partial system failure, the vehicle still has a certain braking capability, thereby greatly improving the reliability and safety of the braking system. In the fail-safe backup state, the ESC module 2 will perform basic distribution of braking force to each wheel according to a preset braking strategy. Although this distribution method may not be as precise and efficient as intelligent control, it is sufficient to guarantee the vehicle's basic braking needs in emergency situations.

[0022] Furthermore, the actuator 3 has a self-detection function for internal leaks. In the self-detection state, SSV, CSV2, TSV, and OV are closed, while POV is open for fluid supply. During pressure build-up, POV closes, the pressure sensor detects pressure changes, and transmits the output curve to the controller, which determines whether an internal leak exists. Specifically, in this embodiment, after the self-detection function is activated, the system first ensures that the key valves SSV, CSV2, TSV, and OV are closed to isolate specific hydraulic circuits and prevent external interference. Subsequently, the POV valve opens, allowing brake fluid to enter the circuit to be tested, preparing for subsequent pressure build-up. When the brake fluid fills the circuit and reaches a certain initial pressure, the POV valve quickly closes, cutting off further brake fluid flow. At this time, the pressure sensor begins to closely monitor pressure changes within the circuit. The pressure sensor converts the real-time collected pressure data into a curve and transmits it to the controller. After receiving this data, the controller uses a built-in algorithm for analysis and processing, comparing the rate of pressure drop with a preset safety threshold to determine whether an internal leak exists. If the pressure drop rate exceeds the threshold, it indicates an internal leak in the circuit, and the controller will immediately issue an alarm signal to prompt maintenance personnel to inspect and repair it. If the pressure drop rate is within the normal range, it indicates that the circuit is well-sealed and there is no internal leak. This self-detection internal leak function greatly improves the maintenance efficiency and safety of the intelligent decoupled braking system, enabling early detection of potential problems and preventing braking performance degradation or failure due to internal leaks, thereby ensuring vehicle driving safety.

[0023] Furthermore, the actuator 3 has a self-detection function for internal leaks. In the self-detection state, the PSV is closed and the POV is open for fluid supply. During pressure build-up, the POV is closed, the pressure sensor detects pressure changes, and transmits the output curve to the controller, which determines whether an internal leak exists. Specifically, in this embodiment, during the specific process of activating the self-detection function, the system first ensures that the PSV is closed to block the relevant hydraulic circuit and eliminate interference factors that may affect the detection results. Simultaneously, the POV valve opens, allowing brake fluid to flow into the circuit area to be detected, laying the foundation for subsequent pressure build-up. As brake fluid continues to fill, the pressure within the circuit gradually increases. When the preset initial pressure value is reached, the POV valve quickly closes, creating a relatively closed space in the circuit. Subsequently, the pressure sensor begins to function, monitoring the pressure changes within the circuit in real time and accurately, and converting the collected pressure data into a curve. This pressure curve data is promptly transmitted to the controller, which uses a built-in intelligent algorithm to analyze and process the data. By meticulously comparing the actual monitored pressure drop rate with a preset safety threshold, the controller can accurately determine whether an internal leak exists in the circuit.

[0024] Furthermore, the pressure building module 4 includes a motor and a plunger. The motor drives the plunger to perform reciprocating linear motion within the cylinder to achieve the intake and discharge of brake fluid.

[0025] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent decoupled braking system, comprising a reservoir, an ESC module, an actuator, and a controller, wherein the actuator is connected to both the reservoir and the ESC module, and the actuator and the controller are communicatively connected, characterized in that: The actuator includes a valve body and a one-way valve assembly, a solenoid valve assembly, and a sensor assembly disposed on the valve body. The one-way valve assembly is fixed inside the valve body by riveting, and the solenoid valve assembly is fixed on the valve body by pre-pressurization.

2. The intelligent decoupling braking system according to claim 1, characterized in that: The actuator also includes a pressure build-up module, a master cylinder and a pedal simulator, and the solenoid valve group includes a CSV valve, a PSV valve, an SSV valve, a TSV valve and a POV valve, wherein two of each of the CSV valve and PSV valve are provided.

3. The intelligent decoupling braking system according to claim 2, characterized in that: The actuator has an energy recovery state. In this state, the pedal master cylinder senses the pedal displacement and pedal displacement speed and transmits them to the pedal position sensor. The pedal position sensor converts the received pedal displacement and pedal displacement speed into corresponding electrical signals and transmits them to the controller. The controller controls the actuator to close the PSV valve based on the received electrical signals and outputs an electrical signal to the vehicle controller. The vehicle controller then controls the vehicle drive motor to stop supplying power. The inertia of the wheels drives the motor to rotate, and the motor becomes a generator, producing current.

4. The intelligent decoupling braking system according to claim 2, characterized in that: The actuator has a boost pressure state. In the boost pressure state, the CSV valve is closed, the SSV valve is open, the pedal simulator simulates pedal force, and the pedal position sensor outputs a curve to the controller based on the magnetic strip displacement speed and displacement amount. The controller outputs an electronic control signal to the pressure building module. After receiving the electronic control signal, the pressure building module responds by increasing the pressure in the braking system. Under high pressure, the brake fluid flows more efficiently to the ESC module through the pipeline. The ESC module distributes the braking force to each wheel according to the controller's instructions.

5. The intelligent decoupling braking system according to claim 2, characterized in that: The actuator has a fail-safe backup state. In the fail-safe backup state, the ESC module is directly connected to the oil reservoir, and the ESC module utilizes the braking pressure directly provided by the oil reservoir.

6. The intelligent decoupling braking system according to claim 2, characterized in that: The actuator has a self-detection function for internal leaks. In the self-detection state, SSV, CSV2, TSV, and OV are in the closed state, and POV is turned on to supply liquid. When pressure is built up, POV is turned off, the pressure sensor detects the pressure change and transmits the output curve to the controller, which determines whether there is an internal leak.

7. The intelligent decoupled braking system according to claim 2, characterized in that: the actuator has a self-detection internal leakage function; when the self-detection internal leakage is in the state, the PSV is closed and the POV is opened to supply liquid; during the pressure build-up process, the POV is closed, the pressure sensor detects the pressure change and transmits the output curve to the controller, which determines whether there is an internal leakage.

8. The intelligent decoupling braking system according to claim 2, characterized in that: The pressure building module includes a motor and a plunger. The motor drives the plunger to perform reciprocating linear motion in the cylinder to realize the intake and discharge of brake fluid.

Images