Integrated valve group for vehicle full power hydraulic brake steer-by-wire control

Abstract

The present application belongs to the technical field of vehicle brake control, and particularly relates to a kind of integrated valve groups of vehicle full power hydraulic brake drive-by-wire operation, the brake integrated valve group includes energy accumulator, pressure sensor, pressure tap, proportional pressure reducing valve, overflow valve, check valve, two-position three-way electromagnetic valve and aluminum brake valve body and its P / T / A three oil ports.The beneficial effects of the present application are that compared with the distributed installation of traditional brake system components, the integrated brake valve group is light in weight and compact in structure, a large number of external pipeline connections are saved, the pipeline layout of the brake system is simplified, and the risk of brake fluid leakage is reduced.The integrated valve group can realize drive-by-wire operation brake speed regulation and parking function, has emergency braking function in emergency situations, and can maximize the safety of vehicle driving.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle brake control, and particularly relates to an integrated valve group for vehicle full-power hydraulic brake drive-by-wire operation. BACKGROUND

[0002] In recent years, with the development of electric vehicles and intelligent driving technology in the passenger vehicle market, the brake power source and execution mode have undergone fundamental changes, and the safety of braking has attracted more and more attention. The response accuracy and reaction time of braking are also required to be higher and higher. For special vehicles using full-power hydraulic braking technology, they also face new demands for module electrification, integration and intelligentization. The traditional braking execution mode cannot fully adapt, and the application demand of the brake-by-wire system based on electric control operation is more and more obvious.

[0003] The traditional full-power hydraulic braking system has many components such as foot valve, liquid filling valve and accumulator, which are distributedly installed on the vehicle body, occupying a large space. Most of the components are made of cast iron, which is very heavy. The connection pipeline layout between the components is complex, which is prone to leakage and difficult to maintain. The response accuracy of the braking system is low, and it cannot meet the use demand of drive-by-wire operation under the intelligent trend. SUMMARY

[0004] (I) Technical problem to be solved

[0005] The technical problem to be solved by the present application is: in order to overcome the shortcomings of the prior art, how to provide a brake integrated valve group suitable for full-power hydraulic braking system, which can be operated by wire control, and integrates many functions such as liquid filling and energy storage, wire control operation, linear proportional output of braking pressure, pressure monitoring and safety redundancy. It is required to be lighter in quality, more compact in structure, faster in reaction and higher in response accuracy, so as to realize the functions of vehicle driving brake deceleration and emergency brake under sudden conditions, and effectively ensure the driving safety of the vehicle.

[0006] (II) Technical scheme

[0007] In order to solve the above technical problems, the present application provides an integrated valve group for vehicle full-power hydraulic brake drive-by-wire operation, which comprises a valve body, wherein an accumulator, a first pressure sensor, a second pressure sensor, a first pressure measuring connector, a second pressure measuring connector, a proportional pressure reducing valve, an overflow valve, a one-way valve, a normally open two-position three-way electromagnetic valve and a normally closed two-position three-way electromagnetic valve and their P, T and A three oil ports are arranged on the valve body.

[0008] The P port is an oil inlet end connected with a brake system hydraulic power source; the A port is an oil outlet end connected with a brake system brake; and the T port is an oil return end connected with a hydraulic power source oil tank.

[0009] The P port is connected with the oil inlet of the proportional pressure reducing valve and the oil inlet of the normally open two-position three-way electromagnetic valve through a first pipeline, and a one-way valve is arranged on the first pipeline between the P port and the proportional pressure reducing valve; the first pressure sensor and the first pressure tapping joint are connected with the accumulator and are arranged on a branch pipeline between the one-way valve and the proportional pressure reducing valve of the first pipeline;

[0010] The T port is connected with the oil return port of the proportional pressure reducing valve and the oil return port of the normally open two-position three-way electromagnetic valve through a second pipeline; the overflow valve is arranged as a safety valve between the first pipeline and the second pipeline; the oil outlet of the proportional pressure reducing valve is connected with the oil inlet of the normally closed two-position three-way electromagnetic valve, the oil outlet of the normally closed two-position three-way electromagnetic valve is connected with the second pressure sensor and the second pressure tapping joint which is communicated with the A port, and the oil return port of the normally closed two-position three-way electromagnetic valve is connected with the oil outlet of the normally open two-position three-way electromagnetic valve;

[0011] The first pressure sensor and the first pressure tapping joint are used for monitoring the pressure of the accumulator, and the second pressure sensor and the pressure tapping joint are used for monitoring the pressure of the A port.

[0012] The accumulator, the first pressure sensor, the second pressure sensor, the first pressure tapping joint, the second pressure tapping joint, the proportional pressure reducing valve, the overflow valve, the one-way valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve are arranged on the upper surface of the valve body, the T port and the P port are arranged on the first side surface which is perpendicular to the upper surface, and the A port is arranged on the second side surface which is opposite to the first side surface.

[0013] The accumulator is used as an energy storage device and a temporary power source; the first pressure sensor and the second pressure sensor are used for measuring the pressure values of the positions and are used for pressure monitoring; and the pressure tapping joint is used for connecting a pressure gauge to facilitate debugging and maintenance.

[0014] The proportional pressure reducing valve is used for controlling the size of the output brake oil hydraulic pressure through a remote electrical signal; and the overflow valve is used for limiting the maximum working pressure of the brake integrated valve group.

[0015] The one-way valve ensures that the brake fluid can only enter the accumulator from the oil source through the P port and cannot flow in the reverse direction; the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve are used for controlling the on-off of the oil circuit; and the valve body is used for integrating the various elements together.

[0016] The proportional pressure reducing valve, the overflow valve, the one-way valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve are integrally installed in a plug-in manner.

[0017] The center line of the upper surface of the valve body is sequentially provided with an accumulator, a first pressure tap, a first pressure sensor and a proportional pressure reducing valve along the front-rear direction, a one-way valve, a relief valve and a normally open two-position three-way electromagnetic valve are arranged on one side of the center line along the front-rear direction, and a second pressure tap, a second pressure sensor and a normally closed two-position three-way electromagnetic valve are arranged on the other side of the center line along the front-rear direction.

[0018] The side where the T port and the P port are located is close to one side of the center line, and the side where the A port is located is close to the other side of the center line.

[0019] Each element is in a plug-in structure and is integrally installed on the aluminum valve body.

[0020] The P, T and A ports are in a threaded connection and end face sealing structure, which is used for installing a pipe joint and facilitates the connection of the brake integrated valve group and other components of the brake system through a pipeline.

[0021] (Three) beneficial effects

[0022] Compared with the prior art, the present application has the following beneficial effects after adopting the above technical solutions:

[0023] (1) The valve group of the present application integrates the accumulator, the pressure sensor, the pressure tap, the proportional pressure reducing valve, the relief valve, the one-way valve, the two-position three-way electromagnetic valve and other components on one valve body, thereby integrating many functions such as liquid charging, accumulator, linear proportional output of brake pressure, pressure monitoring and safety redundancy. The valve group has lighter weight, more compact structure, faster reaction and higher response accuracy, can realize the functions of vehicle driving brake deceleration and emergency brake under sudden conditions, and can effectively ensure the driving safety of the vehicle.

[0024] (2) The proportional pressure reducing valve, the relief valve, the one-way valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve are integrally installed in a plug-in structure, thereby having more compact structure, lighter weight and simple maintenance and repair.

[0025] (3) The present application can make the protruding components extend in one direction of the valve body, so that the surface is relatively flat, thereby saving space and making the structure more compact. Moreover, all the elements are integrally installed on the valve body in a plug-in structure, without pipeline connection, thereby reducing the risk of brake oil leakage.

[0026] (3) The present application can realize the function of driving brake line control operation by controlling the actions of the proportional pressure reducing valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve through remote electrical signals.

[0027] (5)The application is a normally open two-position three-way electromagnetic valve and a normally closed two-position three-way electromagnetic valve, and in the case of power loss, the accumulator directly outputs high pressure to the brake to realize emergency braking function in emergency situations, which can effectively ensure the driving safety of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is the principle structure diagram of the brake integrated valve group of the application.

[0029] Figure 2 is the structure schematic diagram of the brake integrated valve group of the application.

[0030] Figure 3 is the shaft side schematic diagram of the brake integrated valve group of the application.

[0031] In the above drawings:

[0032] 1, accumulator; 2, first pressure sensor; 3, first pressure measuring connector; 4, proportional pressure reducing valve; 5, normally open two-position three-way electromagnetic valve; 6, overflow valve; 7, check valve; 8, normally closed two-position three-way electromagnetic valve; 9, second pressure measuring connector; 10, second pressure sensor; 11, valve body. DETAILED DESCRIPTION

[0033] In order to make the purpose, content and advantages of the application more clear, the specific embodiments of the application are further described in detail below in combination with the drawings and examples.

[0034] Figures 1-3 The brake integrated valve group of the application is disclosed. As shown in Figures 1-3 The valve group includes a valve body 11, and the valve body is provided with an accumulator 1, a first pressure sensor 2, a first pressure measuring connector 3, a proportional pressure reducing valve 4, a normally open two-position three-way electromagnetic valve 5, an overflow valve 6, a check valve 7, a normally closed two-position three-way electromagnetic valve 8, a second pressure measuring connector 9, and a second pressure sensor 10. As shown in Figure 1As shown, the P port is connected to the oil inlet of the proportional pressure reducing valve 4 and the oil inlet of the normally open two-position three-way electromagnetic valve 5 through a first pipeline, a one-way valve 7 is arranged on the first pipeline between the P port and the proportional pressure reducing valve 4; the first pressure sensor 2 and the first pressure tapping joint 3 are connected to the accumulator 1 and are arranged on a branch pipeline between the one-way valve 7 and the proportional pressure reducing valve 4 of the first pipeline; the T port is connected to the oil return port of the proportional pressure reducing valve 4 and the oil return port of the normally open two-position three-way electromagnetic valve 5 through a second pipeline; the overflow valve 6 is arranged as a safety valve between the first pipeline and the second pipeline; the oil outlet of the proportional pressure reducing valve 4 is connected to the oil inlet of the normally closed two-position three-way electromagnetic valve 8, the oil outlet of the normally closed two-position three-way electromagnetic valve 8 is connected to the second pressure sensor 10 and the second pressure tapping joint 9 is communicated with the A port, and the oil return port of the normally closed two-position three-way electromagnetic valve 8 is connected to the oil outlet of the normally open two-position three-way electromagnetic valve 5. Among them, the first pressure sensor 2 and the first pressure tapping joint 3 are used to monitor the accumulator pressure, and the second pressure sensor 10 and the pressure tapping joint 9 are used to monitor the A port pressure.

[0035] The accumulator, the first pressure sensor, the second pressure sensor, the first pressure tapping joint, the second pressure tapping joint, the proportional pressure reducing valve, the overflow valve, the one-way valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve are arranged on the upper surface of the valve body, the T port and the P port are arranged on the first side surface perpendicular to the upper surface, and the A port is arranged on the second side surface opposite to the first side surface; wherein the P port is an oil inlet end connected to the brake system hydraulic power source, the A port is an oil outlet end connected to the brake system brake, and the T port is an oil return end connected to the hydraulic power source tank.

[0036] The accumulator, the first pressure sensor, the second pressure sensor, the first pressure tapping joint, the second pressure tapping joint, the proportional pressure reducing valve, the overflow valve, the one-way valve, the normally open two-position three-way valve and the normally closed two-position three-way electromagnetic valve are arranged on the upper surface of the valve body, the T port and the P port are arranged on the first side surface perpendicular to the upper surface, and the A port is arranged on the second side surface opposite to the first side surface; wherein the P port is an oil inlet end connected to the brake system hydraulic power source, the A port is an oil outlet end connected to the brake system brake, and the T port is an oil return end connected to the hydraulic power source tank.

[0037] As preferred, the proportional pressure reducing valve, the overflow valve, the one-way valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve can be integrally installed in a plug-in type, which is convenient to disassemble and maintain.

[0038] As preferred, the accumulator 1 is used as an energy storage device as a temporary power source; the pressure sensor 2 can measure the pressure value of the valve group oil inlet, and the pressure sensor 10 can measure the pressure value of the valve group oil outlet; the pressure measuring connector 3 and the pressure measuring connector 9 are used to connect the pressure gauge for debugging and maintenance; the proportional pressure reducing valve 4 is used to control the size of the output brake pressure through the line control analog signal; the overflow valve 6 is used to limit the maximum working pressure of the brake integrated valve group; the check valve 7 ensures that the brake fluid can only enter the accumulator through the P port from the oil source and cannot flow in the opposite direction, thereby playing a pressure maintaining role; the normally open two-position three-way electromagnetic valve 5 and the normally closed two-position three-way electromagnetic valve 8 control the on-off of the oil circuit; the brake valve body is used to integrate each element together; the P / T / A three oil ports are used to realize the connection of the brake integrated valve group and other components of the brake system.

[0039] As preferred, as shown in Figure 2 、 3 the center line of the upper surface of the valve body is sequentially provided with the accumulator 1, the first pressure measuring connector 3, the first pressure sensor 2 and the proportional pressure reducing valve 4 along the front-rear direction, the check valve 7, the overflow valve 6 and the normally open two-position three-way electromagnetic valve 5 are arranged on one side of the center line along the front-rear direction, and the second pressure measuring connector 9, the second pressure sensor 10 and the normally closed two-position three-way electromagnetic valve 8 are arranged on the other side of the center line along the front-rear direction. As preferred, the side where the T port and the P port are located is close to one side of the center line, and the side where the A port is located is close to the other side of the center line. It should be noted that the front-rear position here only represents the relative position of each component, and is not the real front-rear position, with the accumulator position as the rear and the proportional pressure reducing valve 4 position as the front.

[0040] The present application can concentrate the protruding components in one direction of the valve body, so that the surface is relatively flat, thereby saving space and making the structure more compact. Moreover, through the layout and arrangement of each component, there is no pipeline connection, which reduces the risk of brake oil leakage.

[0041] The specific way of realizing the function of the brake integrated valve group is as follows:

[0042] The brake integrated valve group contains P, T and A three oil ports, wherein the P port is the oil inlet end connected with the brake system hydraulic power source; the A port is the oil outlet end connected with the brake system brake; and the T port is the oil return end connected with the hydraulic power source tank.

[0043] The accumulator liquid storage process: when the sensor 2 pressure is monitored to the lower limit of the set, open hydraulic power source for brake integrated valve group liquid, hydraulic oil through the oil supply P into the valve group, through the one-way valve 7 for the accumulator 1 liquid, when the sensor 2 monitoring the pressure of the accumulator after the liquid reaches the set upper limit, close the hydraulic power source to stop the accumulator liquid. In this process, if the hydraulic power source is rapidly started or stopped or load changes cause the hydraulic oil to produce pulse or instantaneous impact pressure, the excess oil is discharged through the overflow valve 6, the pressure of the overflow valve is set higher than the accumulator pressure set value 0.5-1Mpa, to protect the system. This road is reserved for pressure connection 3, used for connection pressure gauge during debugging or maintenance, to facilitate real-time monitoring of accumulator pressure changes.

[0044] The working principle of service brake: when the vehicle is in normal driving state, the normally open two-position three-way electromagnetic valve 5 is always in the power state, the proportional pressure reducing valve 4 and the normally closed two-position three-way valve 8 are in the power-off state, and the high pressure oil in the accumulator is kept at the inlet of the normally open two-position three-way electromagnetic valve 5 and the proportional pressure reducing valve 4. At this time, A port is communicated with T port through normally closed two-position three-way electromagnetic valve 8 and normally open two-position three-way electromagnetic valve 5, and the brake pressure is zero, so the vehicle can drive normally. When the vehicle needs to be braked, the normally closed two-position three-way electromagnetic valve 8 is powered on to make its own oil inlet and oil outlet connected, so that the oil of the oil outlet of the proportional pressure reducing valve 4 reaches the A port through the normally closed two-position three-way electromagnetic valve 8. The size of the input electric signal of the proportional pressure reducing valve 4 is controlled to realize the linear proportional adjustable brake pressure of A port. When the input electric signal size is I, the pressure value output by the oil outlet of the proportional pressure reducing valve 4 is P:

[0045]

[0046] Wherein: I is the input electric signal of proportional valve 4; I min is the output pressure of proportional valve 4, which is 0; I max is the maximum electric signal of proportional valve 4, P max is the output pressure of proportional valve 4 corresponding to the electric signal I max .

[0047] According to the braking strength needs, when the input electric signal I of the proportional pressure reducing valve 4 is changed from small to large, the high-pressure oil of the accumulator 1 reaches the A port into the brake through the proportional pressure reducing valve 4 and the normally closed two-position three-way electromagnetic valve 8, the brake pressure is increased accordingly with the input signal I, and the brake torque generated by the brake is also increased accordingly. According to the braking strength needs, when the input electric signal I of the proportional pressure reducing valve 4 is changed from large to small, the output pressure P of the proportional pressure reducing valve 4 overflowed into the oil inlet is reduced, the excess high-pressure oil in the brake returns to the oil tank through the T port through the normally closed two-position three-way electromagnetic valve 8 and the oil return port of the proportional pressure reducing valve 4, the brake pressure is reduced, and the brake torque generated by the brake is also reduced accordingly. When the vehicle no longer needs braking, the normally open two-position three-way electromagnetic valve 5 is kept in the electric state, the proportional pressure reducing valve 4 and the normally closed two-position three-way electromagnetic valve 8 are de-energized, the high-pressure oil in the brake returns to the oil tank through the A port, the normally closed two-position three-way electromagnetic valve 8 and the normally open two-position three-way electromagnetic valve 5, the brake pressure of the brake is reduced to zero, and the brake is completely released.

[0048] Emergency braking working principle: when an emergency occurs, the proportional pressure reducing valve 4, the normally closed two-position three-way valve 8 and the normally open two-position three-way electromagnetic valve 5 of the brake integrated valve group are all de-energized, the high-pressure oil in the accumulator 1 reaches the A port through the normally open two-position three-way electromagnetic valve 5 and the normally closed two-position three-way valve 8, and directly enters the brake, the brake pressure reaches the maximum, and then the vehicle stops with the maximum braking strength, avoiding the safety hazard of the vehicle running. When the vehicle is turned off and the whole vehicle is de-energized, the proportional pressure reducing valve 4, the normally closed two-position three-way valve 8 and the normally open two-position three-way electromagnetic valve 5 of the brake integrated valve group are also automatically de-energized, and the vehicle also stops with the maximum braking strength, ensuring the safety of driving.

[0049] Emergency braking manual release working principle: when the vehicle power cannot be restored and the emergency braking state needs to be released for towing or maintenance operation, the push rod at the top of the normally open two-position three-way electromagnetic valve 5 can be pressed by hand, so that the normally open two-position three-way electromagnetic valve 5 is switched to the right position as shown in the figure, the high-pressure oil in the brake reaches the T port through the A port, the normally closed two-position three-way electromagnetic valve 8 and the normally open two-position three-way electromagnetic valve 5, and returns to the oil tank, the brake pressure of the brake is reduced to zero, and the emergency braking is completely released. Figure 1

[0050] Embodiment 1

[0051] To solve the above technical problems, the basic idea of the technical scheme adopted by the present application is:

[0052] ​The brake integrated valve group comprises a valve body, characterized in that an accumulator, a first pressure sensor, a second pressure sensor, a first pressure tap, a second pressure tap, a proportional pressure reducing valve, an overflow valve, a check valve, a normally open two-position three-way electromagnetic valve, a normally closed two-position three-way electromagnetic valve and a P / T / A three oil ports are arranged on the valve body; the P port is connected with the oil inlet of the proportional pressure reducing valve and the oil inlet of the normally open two-position three-way electromagnetic valve through a first pipeline, and the check valve is arranged on the first pipeline between the P port and the proportional pressure reducing valve; the first pressure sensor and the first pressure tap are connected with the accumulator and arranged on a branch pipeline between the check valve and the proportional pressure reducing valve of the first pipeline; the T port is connected with the oil return port of the proportional pressure reducing valve and the oil return port of the normally open two-position three-way electromagnetic valve through a second pipeline; the overflow valve is arranged between the first pipeline and the second pipeline as a safety valve; the oil outlet of the proportional pressure reducing valve is connected with the oil inlet of the normally closed two-position three-way electromagnetic valve, the oil outlet of the normally closed two-position three-way electromagnetic valve is connected with the second pressure sensor, the second pressure tap is communicated with the port, and the oil return port of the normally closed two-position three-way electromagnetic valve is connected with the oil outlet of the normally open two-position three-way electromagnetic valve.

[0053] The accumulator, the first pressure sensor, the second pressure sensor, the first pressure tap, the second pressure tap, the proportional pressure reducing valve, the overflow valve, the check valve, the normally open two-position three-way electromagnetic valve and the normally closed two-position three-way electromagnetic valve are arranged on the upper surface of the valve body, the T port and the P port are arranged on the first side surface perpendicular to the upper surface, and the A port is arranged on the second side surface opposite to the first side surface.

[0054] The P port is connected with a hydraulic power source of a brake system as an oil inlet end, the A port is connected with a brake of the brake system as an oil outlet end, and the T port is connected with an oil tank of the hydraulic power source as an oil return end.

[0055] The accumulator serves as an energy storage device and a temporary power source to provide power for brake operation.

[0056] The pressure sensors are respectively used for remotely displaying and monitoring the accumulator pressure and the brake circuit pressure in real time.

[0057] The pressure taps are used for connecting pressure gauges to display the accumulator pressure and the brake circuit pressure in real time during maintenance and debugging.

[0058] The proportional pressure reducing valve can remotely control the output of the brake pressure, and the brake pressure is linearly adjustable by controlling the size of the electrical signal input.

[0059] The overflow valve is used to limit the maximum working pressure of the brake integrated valve group to ensure the safety of the brake system.

[0060] The one-way valve ensures that the oil can only enter the accumulator from the power oil source and cannot flow in the opposite direction, ensuring that the oil in the accumulator cannot leak.

[0061] The normally open and normally closed two-position three-way electromagnetic valve is used to control the on-off of the oil circuit, and can realize emergency braking through remote drive-by-wire, and can manually realize emergency braking state release through hand control emergency function.

[0062] The brake integrated valve group adopts plug-in structure, and is integrally installed on the aluminum brake valve body, so that the structure is light and maintenance is quick.

[0063] The P / T / A three oil ports adopt a threaded connection and end face sealing structure, which is used for installing pipe joints, so that the brake integrated valve group and other components of the brake system can be connected through pipelines.

[0064] The above only describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An integrated valve group for the fully power hydraulic brake-by-wire control of a vehicle, characterized in that, The integrated valve group includes a valve body, on which are installed an accumulator, a first pressure sensor, a second pressure sensor, a first pressure testing connector, a second pressure testing connector, a proportional pressure reducing valve, a relief valve, a check valve, a normally open two-position three-way solenoid valve, a normally closed two-position three-way solenoid valve, and its three oil ports P, T, and A. Wherein, port P is the oil inlet and is connected to the hydraulic power source of the braking system; port A is the oil outlet and is connected to the brake of the braking system; port T is the oil return and is connected to the oil tank of the hydraulic power source. The P port is connected to the oil inlet of the proportional pressure reducing valve and the oil inlet of the normally open two-position three-way solenoid valve through the first pipeline. A check valve is installed on the first pipeline between the P port and the proportional pressure reducing valve. The first pressure sensor and the first pressure measuring connector are connected to the accumulator and are on the branch pipeline between the check valve and the proportional pressure reducing valve in the first pipeline. The T port is connected to the return port of the proportional pressure reducing valve and the return port of the normally open two-position three-way solenoid valve through the second pipeline; the overflow valve is set between the first pipeline and the second pipeline as a safety valve; the oil outlet of the proportional pressure reducing valve is connected to the oil inlet of the normally closed two-position three-way solenoid valve, the oil outlet of the normally closed two-position three-way solenoid valve is connected to the second pressure sensor and the second pressure measuring connector and communicates with the A port; the return port of the normally closed two-position three-way solenoid valve is connected to the oil outlet of the normally open two-position three-way solenoid valve. The first pressure sensor and the first pressure measuring connector are used to monitor the accumulator pressure, and the second pressure sensor and the pressure measuring connector are used to monitor the pressure at port A.

2. The integrated valve group for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The accumulator, first pressure sensor, second pressure sensor, first pressure measuring connector, second pressure measuring connector, proportional pressure reducing valve, overflow valve, check valve, normally open two-position three-way solenoid valve, and normally closed two-position three-way solenoid valve are arranged on the upper surface of the valve body. The T port and P port are arranged on the first side perpendicular to the upper surface, and the A port is arranged on the second side opposite to the first side.

3. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The accumulator serves as an energy storage device and a temporary power source; the first pressure sensor and the second pressure sensor are used to measure the pressure value at their location for pressure monitoring; the pressure measuring connector is used to connect a pressure gauge for easy debugging and maintenance.

4. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The proportional pressure reducing valve is used to control the output brake fluid pressure via a remote electrical signal; the relief valve is used to limit the maximum working pressure of the brake integrated valve assembly.

5. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The one-way valve ensures that brake fluid can only enter the accumulator from the oil source through port P and cannot flow in the reverse direction; the normally open two-position three-way solenoid valve and the normally closed two-position three-way solenoid valve are used to control the opening and closing of the oil circuit; the valve body is used to integrate the various components together.

6. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The proportional pressure reducing valve, relief valve, check valve, normally open two-position three-way solenoid valve, and normally closed two-position three-way solenoid valve are integrated and mounted in a cartridge manner.

7. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The accumulator, the first pressure testing connector, the first pressure sensor and the proportional pressure reducing valve are arranged sequentially along the front-back direction on the center line of the upper surface of the valve body. On one side of the center line, a check valve, an overflow valve and a normally open two-position three-way solenoid valve are arranged along the front-back direction. On the other side of the center line, a second pressure testing connector, a second pressure sensor and a normally closed two-position three-way solenoid valve are arranged along the front-back direction.

8. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The side containing the T port and P port is closer to the center line, and the side containing the A port is closer to the center line on the other side.

9. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, All components are cartridge-mounted and integrated into an aluminum valve body.

10. The integrated valve assembly for the fully power hydraulic brake-by-wire control of a vehicle as described in claim 1, characterized in that, The three oil ports P, T, and A are threaded and have end-face sealing structures, used for installing pipe fittings, which facilitates the connection of the brake integrated valve group with other components of the brake system through pipelines.

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