CN210653061U

CN210653061U - Line control hydraulic brake system

Info

Publication number: CN210653061U
Application number: CN201920563418.1U
Authority: CN
Inventors: 徐文泉; 张升; 覃赞文; 袁永彬
Original assignee: WUHU BETHEL ELECTRONIC CONTROL SYSTEMS CO Ltd
Current assignee: WUHU BETHEL ELECTRONIC CONTROL SYSTEMS CO Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-06-02
Anticipated expiration: 2029-04-24

Abstract

The utility model provides a line control hydraulic braking system, through each solenoid valve of reasonable hydraulic circuit connection, brushless motor, worm gear, rack and pinion, footboard sense simulator, master cylinder, liquid storage pot, stopper, realize the line control hydraulic braking function of full decoupling zero, can accomplish line control foundation braking function, anti-lock system's pressurize function, anti-lock system's step-down function, anti-lock system's pressurized cylinder fluid infusion function, initiative pressure boost function, leak failure function in the self-checking detection return circuit.

Description

Line control hydraulic brake system

Technical Field

The utility model relates to an automobile brake control field especially relates to a line control hydraulic braking system.

Background

The boosting of the traditional automobile braking system is realized by utilizing vacuum generated by the work of an engine or vacuum generated by the work of an electronic vacuum pump in a vacuum booster. When braking, a driver steps on a brake pedal to drive a brake master cylinder to build pressure on a brake to generate brake hydraulic pressure through an electric control pressure regulating unit ABS/ESC 2; in the process, the vacuum booster is required to amplify the pedal force in proportion, so that the driver can realize the braking force meeting the braking requirement of the whole vehicle under the appropriate pedal feeling force.

With the development of new energy technology and braking technology of automobiles, the demand for a brake system without vacuum assistance is increasing. The method is mainly embodied in two aspects: the development of new energy automobiles, such as electric automobiles, has the disadvantages that the whole automobile is not provided with a vacuum booster for vacuumizing a power source, namely an engine, and is required to be externally connected with an electronic vacuum pump, and the electric energy consumption and the noise are obvious; and secondly, the development of an active safety braking technology, for example, the vehicle can identify expected danger after being matched with a radar wave or a visual sensor, and the vehicle is actively built to be braked or is emergently braked to avoid collision.

Therefore, the technology of the hydraulic brake-by-wire system is developed, for example, the technology of the hydraulic brake-by-wire system described in patent application No. US20170320477a1 is composed of a brake pedal (1), a master cylinder (2), a pedal sensing unit (3), a liquid storage tank (4), a pressure increasing unit (5), pressure increasing solenoid valves (6 a, 6b, 6c, 6 d), pressure reducing solenoid valves (7 a, 7b, 7c, 7 d), a brake RR (8), a brake RL (9), a brake FR (10), a brake FL (11), an ECU electronic control unit (12), isolation solenoid valves (23 a, 23 b), pump isolation solenoid valves (26 a, 26 b), a detection solenoid valve (28) and a pedal sensing unit solenoid valve (32). However, the above structure is expensive when performing a braking operation, and is expensive when performing a brake-by-wire basic braking function, an anti-lock braking system function, or an active supercharging function. Therefore, it is important to design a hydraulic brake-by-wire system with simple structure and multiple functions.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing a line control hydraulic braking system, through each solenoid valve of reasonable hydraulic circuit connection, brushless motor, worm gear, rack and pinion, footboard sense simulator, master cylinder, liquid storage pot, stopper, realize the line control hydraulic braking function of full decoupling zero, can accomplish line control foundation braking function, anti-lock system's pressurize function, anti-lock system's step-down function, anti-lock system's pressurized cylinder fluid infusion function, initiative pressure boost function, leak failure function in the self-checking detection return circuit.

The utility model provides a line control hydraulic braking system, including liquid storage pot, return circuit detection valve, stroke sensor, master cylinder, footboard sensation simulator isolating valve, footboard sensation simulator, master cylinder isolating valve I, master cylinder isolating valve II, master cylinder pressure sensor, pressure cylinder isolating valve I, pressure cylinder isolating valve II, pressure cylinder, reduction gears, brushless motor, pressure valve I, pressure valve II, pressure valve III, pressure valve IV, relief pressure valve I, relief pressure valve II, relief pressure valve III, relief pressure valve IV, ECU controller, the master cylinder divide into chamber I and chamber II, the liquid storage pot passes through the oil circuit and is connected with the master cylinder, the liquid storage pot passes through return circuit detection valve and is connected with chamber I of master cylinder, the liquid storage pot directly links to each other with master cylinder chamber II; the cavity I and the cavity II of the main cylinder are respectively provided with a liquid outlet oil duct, the cavity I is connected to a main cylinder isolation valve I, the cavity II is connected to a main cylinder isolation valve II, the liquid outlet oil duct of the main cylinder cavity I is connected with a pedal feel simulator isolation valve, and a main cylinder pressure sensor is arranged between the main cylinder isolation valve I and the pedal feel simulator isolation valve on the liquid outlet oil duct of the main cylinder cavity I; the liquid outlet oil duct of the main cylinder cavity I is connected with the pedal feel simulator isolation valve and then connected with the pedal feel simulator, and the back cavity of the pedal feel simulator is hydraulically connected with the liquid storage tank; the hydraulic circuit I where the main cylinder isolation valve I is located is connected with a pressure increasing valve I and a pressure increasing valve II, and the hydraulic circuit II where the main cylinder isolation valve II is located is connected with a pressure increasing valve III and a pressure increasing valve IV; the pressure increasing valve I is connected with a brake I on the whole vehicle, the pressure increasing valve II is connected with a brake II on the whole vehicle, the pressure increasing valve III is connected with a brake III on the whole vehicle, and the pressure increasing valve IV is connected with a brake IV on the whole vehicle; a pressure reducing valve I is arranged between the pressure increasing valve I and a brake I on the whole vehicle, a pressure reducing valve II is arranged between the pressure increasing valve II and a brake II on the whole vehicle, a pressure reducing valve III is arranged between the pressure increasing valve III and a brake III on the whole vehicle, and a pressure reducing valve IV is arranged between the pressure increasing valve IV and a brake IV on the whole vehicle; the pressure reducing valve I, the pressure reducing valve II, the pressure reducing valve III and the pressure reducing valve IV are connected to the liquid storage tank; the brushless motor is mechanically connected with the speed reducing mechanism, the speed reducing mechanism is mechanically connected with the pressure cylinder, and the transmission torque output by the brushless motor linearly pushes and returns the pressure cylinder through the speed reducing mechanism; the output of the pressure cylinder is hydraulically connected with a pressure cylinder isolation valve I and a pressure cylinder isolation valve II, and an oil duct between the pressure cylinder and the pressure cylinder isolation valve I and an oil duct between the pressure cylinder and the pressure cylinder isolation valve II are hydraulically connected with the liquid storage tank; the hydraulic pressure output by the pressure cylinder is respectively connected to a hydraulic circuit II and a hydraulic circuit I through a pressure cylinder isolation valve I and a pressure cylinder isolation valve II; the circuit detection valve, the stroke sensor, the main cylinder, the pedal feel simulator isolation valve, the main cylinder isolation valve I, the main cylinder isolation valve II, the main cylinder pressure sensor, the pressure cylinder isolation valve I, the pressure cylinder isolation valve II, the brushless motor, the pressure valve I, the pressure valve II, the pressure valve III, the pressure valve IV, the pressure reducing valve I, the pressure reducing valve II, the pressure reducing valve III and the pressure reducing valve IV are all in electrical signal connection with the ECU controller and controlled by the ECU controller.

The further improvement lies in that: the liquid storage tank is internally divided into three inner cavities and provided with three liquid outlets, and each inner cavity corresponds to one liquid outlet.

The further improvement lies in that: be provided with filter screen Ia and filter screen IIb on the return circuit check valve, filter screen Ia and filter screen IIb set up in the both ends oil duct of return circuit check valve, be provided with check valve IC on the return circuit check valve, the direction of switching on of check valve IC is for accesss to the master cylinder from the liquid storage pot.

The further improvement lies in that: the travel sensor is provided with more than two paths of electric signals.

The further improvement lies in that: the pedal feel simulator isolation valve is characterized in that a filter screen III a and a filter screen IV b are arranged on the pedal feel simulator isolation valve, the filter screen III a and the filter screen IV b are arranged on oil ducts at two ends of the pedal feel simulator isolation valve, a one-way valve IIc is further arranged on the pedal feel simulator isolation valve, and the conduction direction of the one-way valve IIc is from the pedal feel simulator to the main cylinder.

The further improvement lies in that: the main cylinder isolation valve I and the main cylinder isolation valve II are respectively provided with a filter screen Va, a filter screen VIb, a filter screen VIIa and a filter screen VIII b, the filter screen Va and the filter screen VIb are located on oil ducts at two ends of the main cylinder isolation valve I, and the filter screen VIIa and the filter screen VIII b are located on oil ducts at two ends of the main cylinder isolation valve II.

The further improvement lies in that: be provided with filter screen IX a, filter screen XB and filter screen XIIa, filter screen XIIb on pressure cylinder isolating valve I and the pressure cylinder isolating valve II respectively, filter screen IX a, filter screen XB set up on the both ends oil duct of pressure cylinder isolating valve I, filter screen XIIa, filter screen XIIb set up on the both ends oil duct of pressure cylinder isolating valve II.

The further improvement lies in that: the pressure cylinder is provided with a one-way valve IIIa beside, the conduction direction of the one-way valve IIIa is from the liquid storage tank to the pressure cylinder, and the pressure cylinder is provided with a filter screen XIIIb between the one-way valve IIIa and the liquid storage tank.

The further improvement lies in that: the speed reducing mechanism comprises a worm a, a worm wheel b, a gear c and a rack d, wherein the worm a is mechanically connected with the brushless motor, the worm a is mechanically connected with the worm wheel b, the worm wheel b is mechanically connected with the gear c, the gear c is mechanically connected with the rack d, and the rack d is mechanically connected with a piston d of the pressure cylinder.

The further improvement lies in that: the pressure-increasing valve I is provided with a pressure-increasing valve filter screen Ia and a pressure-increasing valve filter screen IIb, the pressure-increasing valve II is provided with a pressure-increasing valve filter screen IIIa and a pressure-increasing valve filter screen IVb, the pressure-increasing valve III is provided with a pressure-increasing valve filter screen Va and a pressure-increasing valve filter screen VIb, a one-way valve IVc is arranged beside the pressure-increasing valve I, the conduction direction is from the brake I to the pressure-increasing cylinder isolation valve II, a one-way valve Vc is arranged beside the pressure-increasing valve II, the conduction direction is from the brake II to the pressure-increasing cylinder isolation valve II, a one-way valve VIc is arranged beside the pressure-increasing valve III, the conduction direction is from the brake III to the pressure-increasing cylinder isolation valve I, a one-way valve VIIc is arranged beside the pressure-increasing valve IV, and the conduction direction is from the brake IV to the pressure-increasing.

The further improvement lies in that: a brake filter screen Ia is arranged on an oil duct between the pressure reducing valve I and the brake I, a brake filter screen IIa is arranged on an oil duct between the pressure reducing valve II and the brake II, a brake filter screen IIIa is arranged on an oil duct between the pressure reducing valve III and the brake III, and a brake filter screen IVa is arranged on an oil duct between the pressure reducing valve IV and the brake IV.

The brake-by-wire basic brake function: when a driver steps on a brake pedal, an ECU controller receives an electric signal from a pedal stroke sensor, logic judgment is carried out on the braking requirement of the driver, the ECU controller sends a control instruction to a brushless motor to enable the motor to act according to a target, the brushless motor drives a speed reducing mechanism, the speed reducing mechanism pushes a pressure cylinder to achieve liquid drainage and pressurization, and discharged hydraulic pressure passes through a pressure cylinder isolating valve I, a pressure cylinder isolating valve II, a pressure valve I, a pressure valve II, a pressure valve III and a pressure valve IV to a brake I, a brake II, a brake III and a brake IV so as to achieve wheel braking; meanwhile, oil discharged by the main cylinder enters the pedal feel simulator through the pedal feel simulator isolation valve, so that the brake pedal feel of a driver is realized; in the process, the master cylinder isolating valve I and the master cylinder isolating valve II are controlled by the ECU controller to decouple and isolate the brake boosting process and the pedal feeling generation process.

Function of the anti-lock system: when a driver steps on a brake pedal under the condition that wheels are locked in emergency braking, the ECU controller receives a signal from the whole vehicle to judge that the wheels are locked, and the brake pressure of the brake is prevented from further rising. And the ECU controller controls the pressure increasing valve I, the pressure increasing valve II, the pressure increasing valve III and the pressure increasing valve IV to close the hydraulic channel, and prevents the hydraulic pressure of the pressure increasing cylinder from being output to the brake I, the brake II, the brake III and the brake IV, so that the pressure maintaining function of an anti-lock system is realized. When the ECU controller receives a signal from the whole vehicle to judge that the wheels still are locked, the ECU controller controls the pressure reducing valve I, the pressure reducing valve II, the pressure reducing valve III and the pressure reducing valve IV to reduce the pressure of the brake on the basis of preventing the brake pressure of the brake from further rising, and the pressure reducing function of the anti-lock brake system is realized. The ECU controller receives a signal from the whole vehicle to judge that the wheel is locked and released, and when the brake hydraulic pressure is required to be supplemented, the ECU controller controls the booster valve I, the booster valve II, the booster valve III and the booster valve IV to open the hydraulic channel, and the hydraulic pressure of the booster cylinder is output to the brake I, the brake II, the brake III and the brake IV to realize the boosting function of the anti-lock system.

The active supercharging function is as follows: the active boosting function is the basic function of the drive anti-slip ASR, the electronic stability control ESC, the automatic emergency brake AEB and the self-adaptive cruise ACC functions of the drive-by-wire hydraulic brake system serving as an electric control brake system.

When the ECU controller receives a deceleration request from the whole vehicle, a control instruction is sent to the brushless motor to enable the motor to act according to a control target, the brushless motor drives the speed reducing mechanism, the speed reducing mechanism pushes the pressure cylinder to achieve liquid discharge and pressurization, and discharged hydraulic pressure passes through the pressure cylinder isolating valve I, the pressure cylinder isolating valve II, the pressure valve I, the pressure valve II, the pressure valve III and the pressure valve IV to the brake I, the brake II, the brake III and the brake IV so as to achieve target deceleration generated by wheel braking.

The utility model has the advantages that: the hydraulic control system has the advantages that the hydraulic control system is connected with the electromagnetic valves, the brushless motor, the worm gear, the gear rack, the pedal feel simulator, the main cylinder, the liquid storage tank and the brake through a reasonable hydraulic loop, so that a fully-decoupled hydraulic control-by-wire brake function is realized, and the basic brake control function, the pressure maintaining function of the anti-lock system, the pressure reducing function of the anti-lock system, the liquid supplementing function of the pressure cylinder of the anti-lock system, the active pressurizing function and the leakage failure function in the self-checking detection loop.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein: 1-a liquid storage tank, 2-a loop detection valve, 2 a-a filter screen I, 2 b-a filter screen II, 2 c-a check valve I, 4-a travel sensor, 5-a master cylinder, 6-a pedal feel simulator isolation valve, 6 a-a filter screen III, 6 b-a filter screen IV, 6 c-a check valve II, 7-a pedal feel simulator, 8-a master cylinder isolation valve I, 8 a-a filter screen V, 8 b-a filter screen VI, 9-a master cylinder isolation valve II, 9 a-a filter screen VII, 9 b-a filter screen VIII, 10-a master cylinder pressure sensor, 11-a pressure cylinder pressure sensor, 12-a pressure cylinder isolation valve I, 12 a-a filter screen VI, 12 b-a filter screen IX, 13-a pressure cylinder isolation valve II, 13 a-a filter screen I, 13 b-a filter screen XII, 14-pressure cylinder, 14 a-one-way valve III, 15-speed reducing mechanism, 15 a-worm, 15 b-worm wheel, 15 c-gear, 15 d-rack, 16-brushless motor, 17-pressure valve I, 17 a-pressure valve filter I, 17 b-pressure valve filter II, 17 c-one-way valve IV, 18-pressure valve II, 18 a-pressure valve filter III, 18 b-pressure valve filter IV, 18 c-one-way valve V, 19-pressure valve III, 19 a-pressure valve filter V, 19 b-pressure valve filter VI, 19 c-one-way valve VI, 20-pressure valve IV, 20 a-pressure valve filter VII, 20 b-pressure valve filter VIII, 20 c-one-way valve VII, 21-pressure reducing valve I, 21 a-brake filter I, 22-pressure reducing valve II, 22 a-brake filter screen II, 23-pressure reducing valve III, 23 a-brake filter screen III, 24-pressure reducing valve IV, 24 a-brake filter screen IV, 25-brake I, 26-brake II, 27-brake III, 28-brake IV and 29-ECU controller.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be described in detail with reference to the following embodiments, which are only used for explaining the present invention and do not limit the protection scope of the present invention.

As shown in fig. 1, the present embodiment provides a line-controlled hydraulic brake system, which includes a reservoir 1, a loop detection valve 2, a stroke sensor 4, a master cylinder 5, a pedal feel simulator isolation valve 6, a pedal feel simulator 7, a master cylinder isolation valve i 8, a master cylinder isolation valve ii 9, a master cylinder pressure sensor 10, a booster cylinder pressure sensor 11, a booster cylinder isolation valve i 12, a booster cylinder isolation valve ii 13, a booster cylinder 14, a speed reduction mechanism 15, a brushless motor 16, a booster valve i 17, a booster valve ii 18, a booster valve iii 19, a booster valve iv 20, a pressure reduction valve i 21, a pressure reduction valve ii 22, a pressure reduction valve iii 23, a pressure reduction valve iv 24, and an ECU controller 29, the main cylinder 5 is divided into a cavity I and a cavity II, the liquid storage tank 1 is connected with the main cylinder 5 through an oil way, the liquid storage tank 1 is connected with the cavity I of the main cylinder 5 through the loop detection valve 2, and the liquid storage tank 1 is directly connected with the cavity II of the main cylinder; the cavity I and the cavity II of the main cylinder 5 are respectively provided with a liquid outlet oil duct, the cavity I is connected to a main cylinder isolation valve I8, the cavity II is connected to a main cylinder isolation valve II 9, the liquid outlet oil duct of the cavity I of the main cylinder 5 is connected with a pedal feel simulator isolation valve 6, and a main cylinder pressure sensor 10 is arranged between the main cylinder isolation valve I8 and the pedal feel simulator isolation valve 6 on the liquid outlet oil duct of the cavity I of the main cylinder 5; the liquid outlet oil duct of the cavity I of the main cylinder 5 is connected with the pedal feel simulator isolation valve 6 and then connected with the pedal feel simulator 7, and the back cavity of the pedal feel simulator 7 is hydraulically connected with the liquid storage tank 1; a hydraulic circuit I where the main cylinder isolation valve I8 is located is connected with a pressure increasing valve I17 and a pressure increasing valve II 18, and a hydraulic circuit II where the main cylinder isolation valve II 9 is located is connected with a pressure increasing valve III 19 and a pressure increasing valve IV 20; the pressure increasing valve I17 is connected with a brake I25 on the whole vehicle, the pressure increasing valve II 18 is connected with a brake II 26 on the whole vehicle, the pressure increasing valve III 19 is connected with a brake III 27 on the whole vehicle, and the pressure increasing valve IV 20 is connected with a brake IV 28 on the whole vehicle; a pressure reducing valve I21 is arranged between a pressure increasing valve I17 and a brake I25 on the whole vehicle, a pressure reducing valve II 22 is arranged between a pressure increasing valve II 18 and a brake II 26 on the whole vehicle, a pressure reducing valve III 23 is arranged between a pressure increasing valve III 19 and a brake III 27 on the whole vehicle, and a pressure reducing valve IV 24 is arranged between a pressure increasing valve IV 20 and a brake IV 28 on the whole vehicle; the pressure reducing valve I21, the pressure reducing valve II 22, the pressure reducing valve III 23 and the pressure reducing valve IV 24 are connected to the liquid storage tank 1; the brushless motor 16 is mechanically connected with the speed reducing mechanism 15, the speed reducing mechanism 15 is mechanically connected with the pressure cylinder 14, and the transmission torque output by the brushless motor 16 linearly pushes and returns the pressure cylinder 14 through the speed reducing mechanism 15; the output of the pressure cylinder 14 is hydraulically connected with a pressure cylinder isolation valve I12 and a pressure cylinder isolation valve II 13, and an oil passage between the pressure cylinder 14 and the pressure cylinder isolation valve I12 and the pressure cylinder isolation valve II 13 is hydraulically connected with the liquid storage tank 1; the hydraulic pressure output by the pressure cylinder 14 is respectively connected to the hydraulic circuit II and the hydraulic circuit I through a pressure cylinder isolation valve I12 and a pressure cylinder isolation valve II 13; the loop detection valve 2, the stroke sensor 4, the main cylinder 5, the pedal feel simulator isolation valve 6, the main cylinder isolation valve I8, the main cylinder isolation valve II 9, the main cylinder pressure sensor 10, the pressure cylinder pressure sensor 11, the pressure cylinder isolation valve I12, the pressure cylinder isolation valve II 13, the brushless motor 16, the pressure increasing valve I17, the pressure increasing valve II 18, the pressure increasing valve III 19, the pressure increasing valve IV 20, the pressure reducing valve I21, the pressure reducing valve II 22, the pressure reducing valve III 23 and the pressure reducing valve IV 24 are all in electrical signal connection with an ECU controller 29 and controlled by the ECU controller 29. The liquid storage tank 1 is internally divided into three inner cavities and provided with three liquid outlets, and each inner cavity corresponds to one liquid outlet. Be provided with filter screen I2 a and filter screen II 2b on the return circuit check valve 2, filter screen I2 a and filter screen II 2b set up in return circuit check valve 2's both ends oil duct, be provided with check valve I2 c on the return circuit check valve 2, check valve I2 c's the direction of switching on leads to master cylinder 5 for following liquid storage pot 1. The pedal feel simulator isolation valve 6 is provided with a filter screen III 6a and a filter screen IV 6b, the filter screen III 6a and the filter screen IV 6b are arranged on oil ducts at two ends of the pedal feel simulator isolation valve 6, the pedal feel simulator isolation valve 6 is further provided with a one-way valve II 6c, and the conduction direction of the one-way valve II 6c is from the pedal feel simulator 7 to the main cylinder 5. The main cylinder isolation valve I8 and the main cylinder isolation valve II 9 are respectively provided with a filter screen V8 a, a filter screen VI 8b, a filter screen VII 9a and a filter screen VIII 9b, the filter screen V8 a and the filter screen VI 8b are located on oil ducts at two ends of the main cylinder isolation valve I8, and the filter screen VII 9a and the filter screen VIII 9b are located on oil ducts at two ends of the main cylinder isolation valve II 9. A filter screen IX 12a, a filter screen X12 b, a filter screen XI 13a and a filter screen XII 13b are respectively arranged on the pressure cylinder isolation valve I12 and the pressure cylinder isolation valve II 13, the filter screen IX 12a and the filter screen XII 12b are arranged on oil ducts at two ends of the pressure cylinder isolation valve I12, and the filter screen XII 13a and the filter screen XII 13b are arranged on oil ducts at two ends of the pressure cylinder isolation valve II 13. A one-way valve III 14a is arranged beside the pressure cylinder 14, the conducting direction of the one-way valve III 14a is from the liquid storage tank 1 to the pressure cylinder 14, and a filter screen XIII 14b is arranged between the one-way valve III 14a and the liquid storage tank 1 in the pressure cylinder 14. The speed reducing mechanism 15 comprises a worm 15a, a worm wheel 15b, a gear 15c and a rack 15d, wherein the worm 15a is mechanically connected with the brushless motor 16, the worm 15a is mechanically connected with the worm wheel 15b, the worm wheel 15b is mechanically connected with the gear 15c, the gear 15c is mechanically connected with the rack 15d, and the rack 15d is mechanically connected with the piston 14d of the pressure cylinder 14. A pressure valve filter screen I17 a and a pressure valve filter screen II 17b are arranged on the pressure valve I17, a pressure valve filter screen III 18a and a pressure valve filter screen IV 18b are arranged on the pressure valve II 18, a pressure valve filter screen V19 a and a pressure valve filter screen VI 19b are arranged on the pressure valve III 19, a pressure valve filter screen VII 20a and a pressure valve filter screen VIII 20b are arranged on the pressure valve IV 20, a one-way valve IV 17c is arranged beside the pressure increasing valve I17, the conduction direction is from a brake I25 to a pressure increasing cylinder isolation valve II 13, a one-way valve V18 c is arranged beside the booster valve II 18, the conduction direction is from the brake II 26 to the booster cylinder isolating valve II 13, a one-way valve VI 19c is arranged beside the pressure increasing valve III 19, the conduction direction is from a brake III 27 to the pressure increasing cylinder isolating valve I12, and a one-way valve VII c is arranged beside the pressurizing valve IV 20, and the conducting direction is from the brake IV 28 to the pressurizing cylinder isolating valve I12. A brake filter I21 a is arranged on an oil passage between the pressure reducing valve I21 and the brake I25, a brake filter II 22a is arranged on an oil passage between the pressure reducing valve II 22 and the brake II 26, a brake filter III 23a is arranged on an oil passage between the pressure reducing valve III 23 and the brake III 27, and a brake filter IV 24a is arranged on an oil passage between the pressure reducing valve IV 24 and the brake IV 28.

Claims

1. A line-controlled hydraulic brake system is characterized in that: comprises a liquid storage tank (1), a loop detection valve (2), a stroke sensor (4), a main cylinder (5), a pedal feel simulator isolation valve (6), a pedal feel simulator (7), a main cylinder isolation valve I (8), a main cylinder isolation valve II (9), a main cylinder pressure sensor (10), a pressure cylinder pressure sensor (11), a pressure cylinder isolation valve I (12), a pressure cylinder isolation valve II (13), a pressure cylinder (14), a speed reducing mechanism (15), a brushless motor (16), a pressure valve I (17), a pressure valve II (18), a pressure valve III (19), a pressure valve IV (20), a pressure reducing valve I (21), a pressure reducing valve II (22), a pressure reducing valve III (23), a pressure reducing valve IV (24) and an ECU controller (29), wherein the main cylinder (5) is divided into a cavity I and a cavity II, the liquid storage tank (1) is connected with the main cylinder (5) through an oil path, the liquid storage tank (1) is connected with the cavity I of the main cylinder (5) through, the liquid storage tank (1) is directly connected with the main cylinder cavity II; a cavity I and a cavity II of the master cylinder (5) are respectively provided with a liquid outlet oil duct, the cavity I is connected to a master cylinder isolation valve I (8), the cavity II is connected to a master cylinder isolation valve II (9), the liquid outlet oil duct of the cavity I of the master cylinder (5) is connected with a pedal feel simulator isolation valve (6), and a master cylinder pressure sensor (10) is arranged between the master cylinder isolation valve I (8) on the liquid outlet oil duct of the cavity I of the master cylinder (5) and the pedal feel simulator isolation valve (6); the liquid outlet oil duct of the cavity I of the master cylinder (5) is connected with the pedal feel simulator isolation valve (6) and then connected with the pedal feel simulator (7), and the back cavity of the pedal feel simulator (7) is hydraulically connected with the liquid storage tank (1); a hydraulic circuit I where the main cylinder isolation valve I (8) is located is connected with a booster valve I (17) and a booster valve II (18), and a hydraulic circuit II where the main cylinder isolation valve II (9) is located is connected with a booster valve III (19) and a booster valve IV (20); the pressure increasing valve I (17) is connected with a brake I (25) on the whole vehicle, the pressure increasing valve II (18) is connected with a brake II (26) on the whole vehicle, the pressure increasing valve III (19) is connected with a brake III (27) on the whole vehicle, and the pressure increasing valve IV (20) is connected with a brake IV (28) on the whole vehicle; a pressure reducing valve I (21) is arranged between a pressure increasing valve I (17) and a brake I (25) on the whole vehicle, a pressure reducing valve II (22) is arranged between a pressure increasing valve II (18) and a brake II (26) on the whole vehicle, a pressure reducing valve III (23) is arranged between a pressure increasing valve III (19) and a brake III (27) on the whole vehicle, and a pressure reducing valve IV (24) is arranged between a pressure increasing valve IV (20) and a brake IV (28) on the whole vehicle; the pressure reducing valve I (21), the pressure reducing valve II (22), the pressure reducing valve III (23) and the pressure reducing valve IV (24) are connected to the liquid storage tank (1); the brushless motor (16) is mechanically connected with the speed reducing mechanism (15), the speed reducing mechanism (15) is mechanically connected with the pressure cylinder (14), and the transmission torque output by the brushless motor (16) linearly pushes and returns the pressure cylinder (14) through the speed reducing mechanism (15); the output of the pressure cylinder (14) is hydraulically connected with a pressure cylinder isolation valve I (12) and a pressure cylinder isolation valve II (13), and an oil duct between the pressure cylinder (14) and the pressure cylinder isolation valve I (12) and the pressure cylinder isolation valve II (13) is hydraulically connected with the liquid storage tank (1); the hydraulic pressure output by the pressure cylinder (14) is respectively connected to the hydraulic circuit II and the hydraulic circuit I through a pressure cylinder isolation valve I (12) and a pressure cylinder isolation valve II (13); the device comprises a loop detection valve (2), a stroke sensor (4), a main cylinder (5), a pedal feel simulator isolation valve (6), a main cylinder isolation valve I (8), a main cylinder isolation valve II (9), a main cylinder pressure sensor (10), a pressure cylinder pressure sensor (11), a pressure cylinder isolation valve I (12), a pressure cylinder isolation valve II (13), a brushless motor (16), a pressure valve I (17), a pressure valve II (18), a pressure valve III (19), a pressure valve IV (20), a pressure reducing valve I (21), a pressure reducing valve II (22), a pressure reducing valve III (23) and a pressure reducing valve IV (24), wherein the loop detection valve I (2), the stroke sensor (4), the main cylinder (5), the pedal feel simulator isolation valve I (6), the pressure cylinder isolation valve II (13.

2. The hydraulic by-wire brake system according to claim 1, wherein: the liquid storage tank (1) is internally divided into three inner cavities and provided with three liquid outlets, and each inner cavity corresponds to one liquid outlet.

3. The hydraulic by-wire brake system according to claim 1, wherein: be provided with filter screen I (2 a) and filter screen II (2 b) on return circuit check valve (2), filter screen I (2 a) and filter screen II (2 b) set up in the both ends oil duct of return circuit check valve (2), be provided with check valve I (2 c) on return circuit check valve (2), the direction of switching on of check valve I (2 c) is for accesss to master cylinder (5) from liquid storage pot (1).

4. The hydraulic by-wire brake system according to claim 1, wherein: a filter screen III (6 a) and a filter screen IV (6 b) are arranged on the pedal feel simulator isolation valve (6), the filter screens III (6 a) and the filter screens IV (6 b) are arranged on oil ducts at two ends of the pedal feel simulator isolation valve (6), a one-way valve II (6 c) is further arranged on the pedal feel simulator isolation valve (6), and the conduction direction of the one-way valve II (6 c) is communicated to the main cylinder (5) from the pedal feel simulator (7).

5. The hydraulic by-wire brake system according to claim 1, wherein: the main cylinder isolation valve I (8) and the main cylinder isolation valve II (9) are respectively provided with a filter screen V (8 a), a filter screen VI (8 b), a filter screen VII (9 a) and a filter screen VIII (9 b), the filter screen V (8 a) and the filter screen VI (8 b) are located on oil ducts at two ends of the main cylinder isolation valve I (8), and the filter screen VII (9 a) and the filter screen VIII (9 b) are located on oil ducts at two ends of the main cylinder isolation valve II (9).

6. The hydraulic by-wire brake system according to claim 1, wherein: be provided with filter screen IX (12 a), filter screen X (12 b) and filter screen XI (13 a), filter screen XII (13 b) on pressure cylinder isolating valve I (12) and pressure cylinder isolating valve II (13) respectively, filter screen IX (12 a), filter screen XII (12 b) set up on the both ends oil duct of pressure cylinder isolating valve I (12), filter screen XII (13 a), filter screen XII (13 b) set up on the both ends oil duct of pressure cylinder isolating valve II (13).

7. The hydraulic by-wire brake system according to claim 1, wherein: one-way valve III (14 a) is arranged beside pressure cylinder (14), the conduction direction of one-way valve III (14 a) is from liquid storage tank (1) to pressure cylinder (14), and pressure cylinder (14) is provided with filter screen XIII (14 b) between one-way valve III (14 a) and liquid storage tank (1).

8. The hydraulic by-wire brake system according to claim 1, wherein: the speed reducing mechanism (15) comprises a worm (15 a), a worm wheel (15 b), a gear (15 c) and a rack (15 d), the worm (15 a) is mechanically connected with the brushless motor (16), the worm (15 a) is mechanically connected with the worm wheel (15 b), the worm wheel (15 b) is mechanically connected with the gear (15 c), the gear (15 c) is mechanically connected with the rack (15 d), and the rack (15 d) is mechanically connected with a piston (14 d) of the pressurizing cylinder (14).

9. The hydraulic by-wire brake system according to claim 1, wherein: a pressure valve filter screen I (17 a) and a pressure valve filter screen II (17 b) are arranged on the pressure valve I (17), a pressure valve filter screen III (18 a) and a pressure valve filter screen IV (18 b) are arranged on the pressure valve II (18), a pressure valve filter screen V (19 a) and a pressure valve filter screen VI (19 b) are arranged on the pressure valve III (19), a pressure valve filter screen VII (20 a) and a pressure valve filter screen VIII (20 b) are arranged on the pressure valve IV (20), a one-way valve IV (17 c) is arranged beside the pressure valve I (17), the conduction direction is from the brake I (25) to the pressure cylinder isolation valve II (13), a one-way valve V (18 c) is arranged beside the pressure valve II (18), the conduction direction is from the brake II (26) to the pressure cylinder isolation valve II (13), a one-way valve VI (19 c) is arranged beside the pressure valve III (19), and the conduction direction is from the brake I (27) to the pressure cylinder isolation valve II (12), and a one-way valve VII (20 c) is arranged beside the booster valve IV (20), and the conduction direction is from the brake IV (28) to the booster cylinder isolating valve I (12).

10. The hydraulic by-wire brake system according to claim 1, wherein: the brake device is characterized in that a brake filter screen I (21 a) is arranged on an oil duct between the pressure reducing valve I (21) and the brake I (25), a brake filter screen II (22 a) is arranged on an oil duct between the pressure reducing valve II (22) and the brake II (26), a brake filter screen III (23 a) is arranged on an oil duct between the pressure reducing valve III (23) and the brake III (27), and a brake filter screen IV (24 a) is arranged on an oil duct between the pressure reducing valve IV (24) and the brake IV (28).