Electronic hydraulic decoupling brake system

Abstract

The electronic hydraulic decoupling braking system is characterized in that an ESC auxiliary oil supply loop one-way valve is connected between a liquid storage pot and an ESC module; the liquid storage pot is respectively connected with the first cavity and the second cavity of the main cylinder; the self-checking valve is arranged between the liquid storage pot and the second cavity of the main cylinder; the brake pedal is connected with the master cylinder push rod; the self-checking valve parallel check valve is connected with the self-checking valve in parallel The main cylinder pressure sensor is arranged between the main cylinder first cavity and the first isolating valve; the pedal feeling simulator is connected between the outlet of the second cavity of the main cylinder and the second isolating valve; a pressurizing unit pressure sensor is arranged at an outlet of the pressure building unit; the first isolating valve and the second isolating valve are respectively arranged on an outlet of the first brake pipeline and an outlet of the second brake pipeline; the pressure buildup unit is connected with a first brake pipeline and a second brake pipeline through two suction valves, leads to the ESC module and is connected with a first cavity of a main cylinder through a pressure buildup unit electromagnetic valve. The control unit ECU receives signals of all the sensors and braking instructions and controls the electronic hydraulic decoupling braking system to execute a preset working mode.

Description

Technical Field

[0001] The invention relates to the field of automobiles, and in particular to an electronic hydraulic decoupling brake system. Background Art

[0002] Automobile braking performance is an important point that cannot be ignored to ensure safety and have a good driving experience. With the development of electric vehicles and intelligent driving technology, the performance of the braking system, such as redundant backup braking, wire control braking, high energy recovery, brake pedal feel and low noise, has received extensive attention.

[0003] At present, the commonly used solutions for automobile braking systems are the One Box solution and the Two Box (e-Booster electronic booster + ESC body stability system) solution. The One Box solution integrates e-Booster and ESC into the same module. The One Box solution is difficult to meet high-level braking driving requirements due to its low redundancy. The Two Box solution has a high degree of redundancy and can meet the needs of high-level autonomous driving, and is gradually recognized by major OEMs. Among them, the e-Booster in the Two Box solution can be roughly divided into the following solutions: non-decoupling, mechanical decoupling, and hydraulic decoupling. The non-decoupling solution cannot independently realize the braking energy collection, and the mechanical decoupling has the disadvantages of poor pedal feel. The hydraulic decoupling solution can make up for the shortcomings of the two and is gradually recognized by major OEMs. The electronic hydraulic decoupling braking system is an advanced automotive braking technology that uses an electronic control unit (ECU) to achieve precise control of the braking pressure, thereby providing better braking performance and safety.

[0004] Chinese patent CN112622854A discloses a decoupled intelligent braking system, including a pedal assembly, an ECU for logic control, a displacement sensor and a fluid reservoir, the fluid reservoir being connected to the first chamber of the master cylinder, the second chamber of the master cylinder, a servo system and a pedal simulator, a first isolation valve being provided at the outlet of the first chamber of the master cylinder, a pedal simulator valve and a first one-way valve being provided between the outlet of the first chamber of the master cylinder and the first isolation valve, the outlets of the pedal simulator valve and the first one-way valve being connected to the inlet of the pedal simulator; a second isolation valve and a master cylinder pressure sensor being provided at the outlet of the second chamber of the master cylinder; first and second control valves being provided at the outlet of the servo system respectively; the first and second isolation valves, and the first and second control valves being connected to ESC / ABS; the pedal assembly being connected to the first chamber of the master cylinder via a push rod; the function of the detection valve is not elaborated, and some working modes are imperfect.

[0005] Chinese patent CN113428121A discloses an electronic hydraulic brake system and method, including a brake fluid reservoir, a booster cylinder, a pedal simulator, a pedal travel sensor, a brake and a brake pipeline, wherein a first inlet pipeline is connected between the booster cylinder and the brake fluid reservoir, a first supply pipeline is connected between the booster cylinder and the brake pipeline, and a pressure supply valve is arranged on the first supply pipeline; a piston of the pedal simulator is used to connect with the pedal of the vehicle, a second inlet pipeline is connected between the pedal simulator and the brake fluid reservoir, a second supply pipeline is connected between the pedal simulator and the brake pipeline, a decoupling valve is arranged on the second supply pipeline, and a diagnostic valve is arranged on the second inlet pipeline; each brake is also connected to the brake fluid reservoir, a booster valve is arranged on the brake pipeline, and a pressure relief valve is arranged on the return pipeline. It cannot solve the problem of insufficient ESC brake fluid in the case of power compensation and power failure, and some working modes are imperfect. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which are all simplifications of the prior art in the field, and will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] The technical problem to be solved by the present invention is to provide an electronic hydraulic decoupling braking system which can ensure good brake pedal simulation feedback, sufficient fluid replenishment of the HBC working condition braking system, and independent energy recovery.

[0008] In order to solve the above technical problems, the electronic hydraulic decoupling brake system provided by the present invention comprises:

[0009] A liquid storage pot 2, which is connected to the first chamber 9-1 of the master cylinder and the second chamber 9-2 of the master cylinder respectively;

[0010] A self-checking valve 3, which is arranged between the liquid storage pot 1 and the second chamber 9-2 of the master cylinder;

[0011] The pedal displacement sensor 4 and the brake light switch 5 are arranged on the master cylinder push rod.

[0012] A brake pedal 6 connected to a master cylinder push rod;

[0013] The self-check valve is connected in parallel with the check valve 7, which is connected in parallel with the self-check valve 3;

[0014] A master cylinder pressure sensor 8, which is arranged between the master cylinder first chamber 9-1 and the first isolation valve 14;

[0015] A pedal feel simulator solenoid valve 10 disposed between the pedal feel simulator 11 and the second isolation valve 15;

[0016] a pedal feel simulator 11 connected between the outlet of the second chamber 9 - 2 of the master cylinder and the second isolation valve 15 ;

[0017] A boost unit pressure sensor 13, which is arranged at the outlet of the pressure building unit 16;

[0018] A first isolation valve 14, which is arranged at the outlet of the first chamber 9-1 of the master cylinder leading to the first brake pipeline;

[0019] A second isolation valve 15, which is arranged at the outlet of the second chamber 9-2 of the master cylinder leading to the second brake pipeline;

[0020] A pressure building unit 16, which is connected to the first brake line and the second brake line through a suction valve 17 and a suction valve 2 18 respectively and leads to the ESC module 20, and is connected to the first chamber 9-1 of the master cylinder through a pressure building unit solenoid valve 12;

[0021] The control unit ECU19 receives various sensor signals and brake commands, and controls the electronic hydraulic decoupling brake system to execute a predetermined working mode.

[0022] Preferably, the electronic hydraulic decoupling brake system further described in Ghost Sword performs the following control when the driver requests the power assist mode, including:

[0023] When the driver steps on the brake pedal 6, the control unit ECU19 detects the pedal displacement sensor 4 and the master cylinder pressure sensor signals and recognizes the driver's braking intention;

[0024] The control unit ECU19 controls the self-test valve 3 to open, the pedal feel simulator solenoid valve 10 to open, the pressure building unit solenoid valve 12 to close, the first isolation valve 14 and the second isolation valve 15 to close, and the suction valve 1 17 and the suction valve 2 18 to open;

[0025] The pressure building unit 16 builds up pressure to generate braking force; at the same time, the liquid in the second chamber 9 - 2 of the brake master cylinder passes through the pedal feel simulator solenoid valve 10 and flows into the pedal feel simulator 11 .

[0026] Preferably, the electronic hydraulic decoupling brake system described in Ghost Sword further performs the following control when executing the wire control brake mode, including:

[0027] The control unit ECU19 receives the braking command, controls the self-test valve 3, the pedal feeling simulator solenoid valve 10, the suction valve 1 17 and the suction valve 2 18 to open, and controls the pressure building unit solenoid valve 12, the first isolation valve 14 and the second isolation valve 15 to close;

[0028] The pressure building unit 16 builds up pressure to generate braking force.

[0029] Preferably, the electronic hydraulic decoupling brake system described in Ghost Sword further performs the following control when executing the active boost detection mode, including:

[0030] The control unit ECU19 recognizes that the boost detection condition is met;

[0031] The control unit ECU19 controls the self-test valve 3, the pedal feeling simulator solenoid valve 10, the pressure building unit solenoid valve 12, the suction valve 1 17 and the suction valve 2 18 to close; and controls the first isolation valve 14 and the second isolation valve 15 to open;

[0032] The pressure building unit 16 builds pressure, and the brake fluid in the pressure building unit 16 passes through the suction valve 17, the second isolation valve 15 and the second chamber 9-2 of the brake master cylinder, pushing the plunger of the first chamber 9-1 of the brake master cylinder to make the internal brake fluid flow into the master cylinder pressure sensor 8 and flow to the first isolation valve 14;

[0033] The control unit ECU 19 detects that if the hydraulic pressure output by the master cylinder pressure sensor 8 and the hydraulic pressure output by the boost unit pressure sensor 13 are within a specified range, the detection is passed; otherwise, the detection fails.

[0034] Preferably, the electronic hydraulic decoupling brake system further described in Ghost Sword performs the following control when executing the pressure building unit fluid replenishment mode, including:

[0035] The control unit ECU19 recognizes that the rehydration condition is met;

[0036] The control unit ECU19 controls the self-test valve 3, the pressure building unit solenoid valve 12, the suction valve 1 17 and the suction valve 2 PSV218 to be opened, and the pedal feel simulator solenoid valve 10, the first isolation valve 14 and the second isolation valve 15 to be closed;

[0037] The pressure building unit 16 performs fluid replenishment.

[0038] Preferably, the electronic hydraulic decoupling brake system described in Ghost Sword further performs the following control when executing the fail-safe backup brake mode, including:

[0039] The control unit ECU19 detects that a valve fails and performs a power-off operation. The self-test valve 3, the first isolation valve 14 and the second isolation valve 15 are powered off and opened, and the pedal feel simulator solenoid valve 10, the pressure building unit solenoid valve 12, the suction valve 1 17 and the suction valve 2 18 are powered off and closed;

[0040] When the driver steps on the brake pedal 6, the hydraulic pressure in the master brake cylinder 9 increases, and the brake fluid flows to the wheel cylinder through the first isolation valve 14, the second isolation valve 15 and the ESC module 20 to generate braking force.

[0041] Preferably, the electronic hydraulic decoupling brake system described in Ghost Sword further performs the following control when executing the HBC working condition fluid replenishment mode, including:

[0042] When the HBC function is triggered, if the brake fluid in the brake master cylinder 9 is insufficient, the brake fluid flows directly into the ESC module 20 through the ESC auxiliary oil supply circuit check valve 1 and the self-test valve parallel check valve 7.

[0043] Preferably, the electronic hydraulic decoupling brake system described in Ghost Sword further performs the following control when the driver requests the power-assist mode, including:

[0044] When the driver requests the power-assist mode to be triggered and the braking energy recovery conditions are met, the control unit ECU19 requests the vehicle to execute the designed recovery torque and controls the pressure building unit 16 to reduce the brake fluid pressure.

[0045] The electronic hydraulic decoupling brake system provided by the present invention adopts a seven-valve solution and is used in pure electric or hybrid electric vehicles, which can achieve the following technical effects:

[0046] 1. The present invention is a hydraulic decoupling brake system, which can ensure good pedal feel during braking due to the spring and damping effects of the pedal feel simulator.

[0047] 2. The present invention has an ESC auxiliary oil supply circuit, which can ensure sufficient fluid replenishment in HBC working conditions.

[0048] 3. In the hydraulic decoupling system of the present invention, the pressure build-up of the braking system is decoupled from the brake pedal force, so the system can independently achieve energy recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings of the present invention are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present invention, and to supplement the description in the specification. However, the drawings of the present invention are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment, and the drawings of the present invention should not be interpreted as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments of the present invention. The present invention is further described in detail below in conjunction with the drawings and specific embodiments:

[0050] Figure 1 It is a schematic diagram of the architecture of the present invention.

[0051] Description of reference numerals:

[0052] ESC auxiliary oil supply circuit check valve 1

[0053] Liquid storage pot 2

[0054] Self-check valve 3

[0055] Pedal displacement sensor 4

[0056] Brake light switch 5

[0057] Brake pedal 6

[0058] Self-check valve parallel check valve 7

[0059] Master cylinder pressure sensor 8

[0060] Master cylinder first chamber 9-1

[0061] Master cylinder second chamber 9-2

[0062] Pedal Feel Simulator Solenoid Valve 10

[0063] Pedal Feel Simulator 11

[0064] First isolation valve 14

[0065] Second isolation valve 15

[0066] Pressure building unit 16

[0067] Suction valve 17

[0068] Suction valve 218

[0069] Control unit ECU19

[0070] ESC module 20. DETAILED DESCRIPTION

[0071] The following is an explanation of the embodiments of the present invention by specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the general design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, the element can be directly connected or coupled to another element, or there can be an intermediate element. In addition, it should also be understood that although the terms "first", "second", etc. can be used here to describe different elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teaching of exemplary embodiments according to the present invention, the first element, component, region, layer or part discussed below may also be referred to as the second element, component, region, layer or part.

[0072] Example

[0073] refer to Figure 1 As shown, the electronic hydraulic decoupling brake system provided by the present invention comprises:

[0074] An ESC auxiliary oil supply circuit one-way valve 1, which is connected between the reservoir 2 and the ESC module 20;

[0075] A liquid storage pot 2, which is connected to the first chamber 9-1 of the master cylinder and the second chamber 9-2 of the master cylinder respectively;

[0076] A self-checking valve 3, which is arranged between the liquid storage pot 1 and the second chamber 9-2 of the master cylinder;

[0077] The pedal displacement sensor 4 and the brake light switch 5 are arranged on the master cylinder push rod.

[0078] A brake pedal 6 connected to a master cylinder push rod;

[0079] The self-check valve is connected in parallel with the check valve 7, which is connected in parallel with the self-check valve 3;

[0080] A master cylinder pressure sensor 8, which is arranged between the master cylinder first chamber 9-1 and the first isolation valve 14;

[0081] A pedal feel simulator solenoid valve 10 disposed between the pedal feel simulator 11 and the second isolation valve 15;

[0082] a pedal feel simulator 11 connected between the outlet of the second chamber 9 - 2 of the master cylinder and the second isolation valve 15 ;

[0083] A boost unit pressure sensor 13, which is arranged at the outlet of the pressure building unit 16;

[0084] A first isolation valve 14, which is arranged at the outlet of the first chamber 9-1 of the master cylinder leading to the first brake pipeline;

[0085] A second isolation valve 15, which is arranged at the outlet of the second chamber 9-2 of the master cylinder leading to the second brake pipeline;

[0086] A pressure building unit 16, which is connected to the first brake line and the second brake line through a suction valve 17 and a suction valve 2 18 respectively and leads to the ESC module 20, and is connected to the first chamber 9-1 of the master cylinder through a pressure building unit solenoid valve 12;

[0087] The control unit ECU19 receives various sensor signals and brake commands, and controls the electronic hydraulic decoupling brake system to execute a predetermined working mode.

[0088] The above describes the specific composition of the present invention, and the following further describes the operation of each mode of the present invention.

[0089] When the driver requests the power assist mode, the following controls are performed, including:

[0090] When the driver steps on the brake pedal 6, the control unit ECU19 detects the signals of the pedal displacement sensor 4 and the master cylinder pressure sensor 8 and recognizes the driver's braking intention;

[0091] The control unit ECU19 controls the self-test valve 3 to open, the pedal feel simulator solenoid valve 10 to open, the pressure building unit solenoid valve 12 to close, the first isolation valve 14 and the second isolation valve 15 to close, and the suction valve 1 17 and the suction valve 2 18 to open;

[0092] The pressure building unit 16 drives the pressure building master cylinder to build pressure through the motor and transmission mechanism, thereby increasing the wheel cylinder pressure to generate braking force; at the same time, the liquid in the second chamber 9-2 of the brake master cylinder passes through the pedal feel simulator solenoid valve 10 and flows into the pedal feel simulator 11. Due to the action of the spring and damping, a good pedal feel can be guaranteed.

[0093] When brake-by-wire mode is in effect, the following controls are performed, including:

[0094] The control unit ECU19 receives the braking command, and the control unit ECU19 controls the self-test valve 3 to open, the pedal feeling simulator solenoid valve 10 to open, the pressure building unit solenoid valve 12 to close, the first isolation valve 14 and the second isolation valve 15 to close, and the suction valve 1 17 and the suction valve 2 18 to open;

[0095] The pressure building unit 16 drives the pressure building master cylinder to build pressure through the motor and the transmission mechanism, thereby increasing the wheel cylinder pressure to generate braking force.

[0096] When the active boost detection mode is executed, the following controls are performed, including:

[0097] The control unit ECU19 recognizes that the boost detection condition is met; the boost detection condition can be specified according to the actual situation of the system and the ECU determines whether it is met;

[0098] The control unit ECU19 controls the self-test valve 3 to be closed, the pedal feeling simulator solenoid valve 10 to be closed, the pressure building unit solenoid valve 12 to be closed, the first isolation valve 14 to be closed, the second isolation valve 15 to be opened, the suction valve 17 to be opened, and the suction valve 2 PSV218 to be closed; then, the pressure building unit 16 drives the pressure building master cylinder to build pressure through the motor and the transmission mechanism, and the brake fluid in the pressure building unit 16 passes through the suction valve 17, the second isolation valve 15, and the second chamber 9-2 of the brake master cylinder, and then pushes the plunger of the first chamber 9-1 of the brake master cylinder to make the internal brake fluid flow into the master cylinder pressure sensor 8, and finally flow to the first isolation valve 14;

[0099] The control unit ECU 19 detects that if the hydraulic pressure output by the master cylinder pressure sensor 8 and the hydraulic pressure output by the boost unit pressure sensor 13 are within a certain range, the detection is passed; otherwise, the detection fails.

[0100] When executing the pressure building unit fluid replenishment mode, the following controls are performed, including:

[0101] The control unit ECU19 recognizes that the refilling condition is met; for example, the pressure recognized by the ECU is less than a specified threshold;

[0102] The control unit ECU19 controls the self-test valve 3 to open, the pedal feel simulator solenoid valve 10 to close, the pressure building unit solenoid valve 12 to open, the first isolation valve 14 to close, the second isolation valve 15 to close, the suction valve 1 17 and the suction valve 2 18 to open;

[0103] The pressure building unit 16 drives the pressure building main cylinder to move left and right through the motor and the transmission mechanism to replenish fluid.

[0104] When the fail-safe braking mode is executed, the following controls are performed, including:

[0105] The control unit ECU19 recognizes that a valve fails. When any of the seven valves fails, the power is turned off. The self-test valve 3, the first isolation valve 14 and the second isolation valve 15 are powered off and opened, and the pedal feel simulator solenoid valve 10, the pressure building unit solenoid valve 12, the suction valve 1 17 and the suction valve 2 18 are powered off and closed;

[0106] When the driver steps on the brake pedal 6, the hydraulic pressure in the master brake cylinder 9 increases, and the brake fluid flows to the wheel cylinder through the first isolation valve 14, the second isolation valve 15 and the ESC module 20 to generate braking force.

[0107] When executing HBC working condition rehydration mode, the following controls are performed, including:

[0108] When the HBC function is triggered, if the brake fluid in the brake master cylinder 9 is insufficient, the brake fluid flows directly into the ESC module 20 through the ESC auxiliary oil supply circuit check valve 1 and the self-test valve parallel check valve 7.

[0109] When the driver requests power-assist mode, the following controls are performed, including:

[0110] When the driver requests the power-assist mode to be triggered and the braking energy recovery conditions are met, the control unit ECU19 requests the vehicle to execute the designed recovery torque and controls the pressure building unit 16 to reduce the brake fluid pressure.

[0111] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless expressly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not interpreted in an ideal or overly formal sense.

[0112] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An electronic hydraulic decoupling brake system, characterized in that: include: An ESC auxiliary oil supply circuit one-way valve (1), which is connected between the liquid reservoir (2) and the ESC module (20); A liquid storage pot (2) connected to the first chamber (9-1) of the master cylinder and the second chamber (9-2) of the master cylinder respectively; A self-checking valve (3) is arranged between the liquid storage pot (1) and the second chamber (9-2) of the main cylinder; The pedal displacement sensor (4) and the brake light switch (5) are arranged on the master cylinder push rod. A brake pedal (6) connected to a master cylinder push rod; The self-checking valve is connected in parallel with the one-way valve (7), which is connected in parallel with the self-checking valve (3); A master cylinder pressure sensor (8) disposed between the first chamber (9-1) of the master cylinder and the first isolation valve (14); A pedal feel simulator solenoid valve (10) disposed between the pedal feel simulator (11) and the second isolation valve (15); A pedal feeling simulator (11) connected between the outlet of the second chamber (9-2) of the master cylinder and the second isolation valve (15); A pressure sensor (13) for a boost unit, arranged at the outlet of a pressure building unit (16); A first isolation valve (14) is arranged at an outlet of the first chamber (9-1) of the master cylinder leading to the first brake pipeline; A second isolation valve (15) is arranged at an outlet of the second chamber (9-2) of the master cylinder leading to the second brake pipeline; A pressure building unit (16), which is connected to the first brake line and the second brake line respectively through a suction valve 1 (17) and a suction valve 2 (18) and leads to an ESC module (20), and is connected to the first chamber (9-1) of the master cylinder through a pressure building unit solenoid valve (12); The control unit ECU (19) receives various sensor signals and a braking command, and controls the electronic hydraulic decoupling braking system to execute a predetermined working mode.

2. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When the driver requests the power assist mode, the following controls are performed, including: When the driver steps on the brake pedal (6), the control unit ECU (19) detects the pedal displacement sensor (4) and the master cylinder pressure sensor signals and recognizes the driver's braking intention; The control unit ECU (19) controls the self-test valve (3) to open, the pedal feeling simulator solenoid valve (10) to open, the pressure building unit solenoid valve (12) to close, the first isolation valve (14) and the second isolation valve (15) to close, and the suction valve 1 (17) and the suction valve 2 (18) to open; The pressure building unit (16) builds up pressure to generate braking force; at the same time, the liquid in the second chamber (9-2) of the brake master cylinder flows into the pedal feeling simulator (11) through the pedal feeling simulator solenoid valve (10).

3. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When brake-by-wire mode is in effect, the following controls are performed, including: The control unit ECU (19) receives a braking command, controls the self-test valve (3), the pedal feeling simulator solenoid valve (10), the first suction valve (17) and the second suction valve (18) to open, and controls the pressure building unit solenoid valve (12), the first isolation valve (14) and the second isolation valve (15) to close; The pressure building unit (16) builds up pressure to generate braking force.

4. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When the active boost detection mode is executed, the following controls are performed, including: The control unit ECU (19) recognizes that a boost detection condition is met; The control unit ECU (19) controls the self-test valve (3), the pedal feeling simulator solenoid valve (10), the pressure building unit solenoid valve (12), the first suction valve (17) and the second suction valve (18) to be closed; and controls the first isolation valve (14) and the second isolation valve (15) to be opened; The pressure building unit (16) builds pressure, and the brake fluid in the pressure building unit (16) passes through the suction valve 1 (17), the second isolation valve (15) and the second chamber (9-2) of the brake master cylinder, pushing the plunger of the first chamber (9-1) of the brake master cylinder so that the brake fluid inside the brake master cylinder flows into the master cylinder pressure sensor (8) and flows to the first isolation valve (14); The control unit ECU (19) detects that the output fluid pressure of the master cylinder pressure sensor (8) and the output fluid pressure of the boost unit pressure sensor (13) are within a specified range, and the detection is passed; otherwise, the detection fails.

5. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When executing the pressure building unit fluid replenishment mode, the following controls are performed, including: The control unit ECU (19) recognizes that the rehydration condition is met; The control unit ECU (19) controls the self-test valve (3), the pressure building unit solenoid valve (12), the first suction valve (17) and the second suction valve PSV2 (18) to open, and the pedal feel simulator solenoid valve (10), the first isolation valve (14) and the second isolation valve (15) to close; The pressure building unit (16) performs fluid replenishment.

6. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When the fail-safe braking mode is executed, the following controls are performed, including: The control unit ECU (19) performs a power-off operation after recognizing that a valve fails, the self-test valve (3), the first isolation valve (14) and the second isolation valve (15) are powered off and opened, and the pedal feeling simulator solenoid valve (10), the pressure building unit solenoid valve (12), the suction valve 1 (17) and the suction valve 2 (18) are powered off and closed; When the driver steps on the brake pedal (6), the hydraulic pressure in the brake master cylinder (9) increases, and the brake fluid flows to the wheel cylinder through the first isolation valve (14), the second isolation valve (15) and the ESC module (20) to generate braking force.

7. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When executing HBC working condition rehydration mode, the following controls are performed, including: When the HBC function is triggered, if the brake fluid in the brake master cylinder (9) is insufficient, the brake fluid flows directly into the ESC module (20) through the ESC auxiliary oil supply circuit check valve (1) and the self-check valve parallel check valve (7).

8. The electronic hydraulic decoupling brake system according to claim 1, characterized in that: When the driver requests power-assist mode, the following controls are performed, including: When the driver requests the power-assist mode to be triggered and the braking energy recovery condition is met, the control unit ECU (19) requests the vehicle to execute the designed recovery torque and controls the pressure building unit (16) to reduce the brake fluid pressure.

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