KR20220000377A - Electric brake system - Google Patents

Abstract

An electronic brake system is disclosed. In accordance with the present invention, the electronic brake system includes: a first block including a master cylinder including a first master piston connected with a brake pedal, and a first master chamber changed in volume due to the displacement of the first master piston; a second block placed apart from the first block and including a pedal simulator, a fluid pressure supply device operating a hydraulic piston due to an electric signal to generate fluid pressure, and a fluid pressure control unit including a first hydraulic circuit controlling the fluid pressure delivered to two wheel cylinders, and a second hydraulic circuit controlling the fluid pressure delivered to the other two wheel cylinders; a plurality of electronic control units controlling all sorts of devices and valves based on fluid pressure information and displacement information of the brake pedal; and a connection line having one end connected to the first block and having the other end connected to the second block. Therefore, the present invention is capable of embodying stable and effective braking performance.

Description

Electronic brake system

The present invention relates to an electronic brake system, and more particularly, to an electronic brake system for improving pedal feel and reducing kickback occurrence.

A brake system for performing braking is essential to a vehicle, and various types of brake systems have been proposed for the safety of drivers and passengers.

The conventional brake system mainly uses a method of supplying hydraulic pressure required for braking to wheel cylinders using a mechanically connected booster when a driver presses a brake pedal. However, as the market demand to implement various braking functions in detail in response to the operating environment of the vehicle increases, recently, when the driver steps on the brake pedal, the driver's braking intention is electrically controlled from the pedal displacement sensor that detects the displacement of the brake pedal. An electronic brake system that receives a signal and operates a hydraulic pressure supply device based on the signal to supply hydraulic pressure required for braking to the wheel cylinders is widely used.

Such an electronic brake system generates and provides an electric signal for the driver's brake pedal operation in the normal operation mode or the braking judgment during autonomous driving of the vehicle, and based on this, the hydraulic pressure supply device is electrically operated and controlled to reduce the hydraulic pressure required for braking. formed and transferred to the wheel cylinder. As described above, the electronic brake system and operation method are electrically operated and controlled, and although complex and diverse braking actions can be implemented, when a technical problem occurs in the electrical components, the hydraulic pressure required for braking is not stably formed. There is a risk of jeopardizing the safety of passengers.

Since most of the components of the electronic brake system are controlled by electrical signals of the electronic control unit (ECU), a failure of the electronic control unit may cause a great problem. Therefore, the electronic brake system may include a plurality of electronic control units in case the electronic control unit fails, and even if one electronic control unit operates abnormally, the other electronic control unit that recognizes this is connected to operate to ensure the safety of passengers. also promote

On the other hand, the moment when a failure occurs in one electronic control unit that was operating in the normal mode and the other electronic control unit that recognizes it operates, the electronic brake system temporarily operates in an abnormal operation mode in which there is no electrical signal. , may cause discomfort, such as kickback, to the driver's pedal feeling when switching modes.

EP 2 520 473 A1 (Honda Motor Co., Ltd.) 2012. 11. 7.

An object of the present embodiment is to provide an electronic brake system that can effectively implement braking in various operating situations.

The present embodiment is intended to provide an electronic brake system with improved performance and operational reliability.

The present embodiment intends to provide an electronic brake system capable of improving the degree of design freedom of a vehicle.

An object of the present embodiment is to provide an electronic brake system capable of easily and efficiently installing and disposing a vehicle.

An object of the present embodiment is to provide an electronic brake system capable of stably providing a braking pressure even when a component element fails.

An object of the present embodiment is to provide an electronic brake system capable of improving safety through the redundancy function of a plurality of electronic control units.

An object of the present embodiment is to provide an electronic brake system capable of reducing a kickback and maintaining pedal feel to reduce a sense of heterogeneity in a driver's pedal feel.

According to an aspect of the present invention, a first block including a master cylinder having a first master piston connected to a brake pedal, and a first master chamber whose volume is changed by displacement of the first master piston; A pedal simulator, a hydraulic pressure supply device that generates hydraulic pressure by operating a hydraulic piston by an electrical signal, and a first hydraulic circuit that controls the hydraulic pressure delivered to the two wheel cylinders and the other two wheel cylinders. a second block including a hydraulic control unit having a second hydraulic circuit and spaced apart from the first block; a plurality of electronic control units for controlling various devices and valves based on hydraulic pressure information and displacement information of the brake pedal; and a connecting line having one end connected to the first block and the other end connected to the second block, wherein the connecting line has one end connected to the first master chamber and the other end connected to the pedal simulator side. We want to provide a brake system.

The master cylinder further includes a second master piston provided to be displaceable by the hydraulic pressure of the first master chamber, and a second master chamber whose volume is changed by displacement of the second master piston, wherein the connection line is An object of the present invention is to provide an electronic brake system further comprising a second connection line having one end connected to the second master chamber and the other end connected to the second hydraulic circuit side.

The first block further includes a main reservoir in which the pressurized medium is stored, the electronic unit further comprises a sub-reservoir in which the pressurized medium is stored, and the connection line has one end connected to the main reservoir and the other end connected to the sub-reservoir. An object of the present invention is to provide an electronic brake system further comprising a third connection line connected to the .

The second block includes an outlet passage connecting the first hydraulic circuit and the sub-reservoir, a first cut valve provided in the outlet passage to control the flow of the pressurized medium, and a flow of the pressurized medium provided in the second connecting line. An object of the present invention is to provide an electronic brake system further comprising a second cut valve for controlling the .

The second block further includes a first sub-reservoir passage connecting the sub-reservoir and the rear end of the first hydraulic circuit, and a second sub-reservoir passage connecting the sub-reservoir and the rear end of the second hydraulic circuit. We want to provide a brake system.

The second block further includes a simulator discharge flow path connected to the rear end of the pedal simulator, and the simulator discharge flow path joins the first sub-reservoir flow path to provide an electronic brake system connected to the sub-reservoir.

The hydraulic control unit is to provide an electromagnetic brake system further comprising a balance flow path connecting the first hydraulic circuit and the second hydraulic circuit, and a balance valve provided in the balance flow path to control the flow of the pressurized medium.

The first block is to provide an electronic brake system further comprising a pedal folding device provided between the first master piston and the brake pedal.

The first block further includes a main reservoir in which the pressurized medium is stored, the electronic unit further comprises a sub-reservoir in which the pressurized medium is stored, and the connection line has one end connected to the main reservoir and the other end connected to the sub-reservoir. An object of the present invention is to provide an electronic brake system further comprising a second connection line connected to the .

The second block further includes a first sub-reservoir passage connecting the sub-reservoir and the rear end of the first hydraulic circuit, and a second sub-reservoir passage connecting the sub-reservoir and the rear end of the second hydraulic circuit. We want to provide a brake system.

The second block includes a first outlet passage connecting the first hydraulic circuit and the first sub-reservoir passage, a second outlet passage connecting the second hydraulic circuit and the sub-reservoir, and in the first outlet passage. An object of the present invention is to provide an electronic brake system further comprising a first cut valve provided to control the flow of the pressurized medium, and a second cut valve provided to the second outlet flow path to control the flow of the pressurized medium.

The second block further includes a simulator discharge flow path connected to the rear end of the pedal simulator, and the simulator discharge flow path joins the first sub-reservoir flow path to provide an electronic brake system connected to the sub-reservoir.

The pedal folding device includes an actuator that generates and provides power, and a gear unit provided between an input rod connected to the brake pedal and the actuator to convert the rotational force of the actuator into a linear motion of the input rod. want to

The hydraulic pressure supply device is to provide an electronic brake system including a first pressure chamber provided in front of the hydraulic piston, and a second pressure chamber provided in the rear of the hydraulic piston.

The second block further includes a dump control unit provided between the sub-reservoir and the hydraulic pressure supply device to control the flow of the pressurized medium, and the dump control unit controls the flow of the pressurized medium between the first pressure chamber and the sub-reservoir. An object of the present invention is to provide an electronic brake system including a first dump control unit and a second dump control unit for controlling a flow of a pressurized medium between the second pressure chamber and the sub-reservoir.

The second block further includes a third sub-reservoir flow path connecting the sub-reservoir and the first dump control unit, and a fourth sub-reservoir flow path connecting the sub-reservoir and the second dump control unit. want to

The plurality of electronic control units include a first electronic control unit for controlling various devices and valves, and a second electronic control unit for controlling the electronic unit when the first electronic control unit operates abnormally. would like to provide

The electronic brake system according to the present embodiment can stably and effectively implement braking in various operating situations of the vehicle.

The electronic brake system according to the present embodiment can improve the design freedom of the vehicle.

The electronic brake system according to the present embodiment can easily and efficiently perform the installation and arrangement of the vehicle.

In the electronic brake system according to the present embodiment, product performance and operational reliability may be improved.

The electronic brake system according to the present embodiment can stably provide a braking pressure even when a component element fails.

The electronic brake system according to the present embodiment may improve safety through the redundancy function of the plurality of electronic control units.

The electronic brake system according to the present embodiment reduces kickback and maintains pedal feel, thereby reducing the sense of heterogeneity in the driver's pedal feel.

1 is a hydraulic circuit diagram showing an electronic brake system according to a first embodiment of the present invention.
2 is a hydraulic circuit diagram illustrating an operation in the first normal mode of the electronic brake system according to the first embodiment of the present invention.
3 is a hydraulic circuit diagram illustrating an operation in a switching state of the electronic brake system according to the first embodiment of the present invention.
4 is a hydraulic circuit diagram illustrating an operation in a second normal mode of the electronic brake system according to the first embodiment of the present invention.
5 is a hydraulic circuit diagram illustrating an operation in a fallback mode of the electronic brake system according to the first embodiment of the present invention.
6 is a hydraulic circuit diagram showing an electromagnetic brake system according to a modified example of the first embodiment of the present invention.
7 is a hydraulic circuit diagram illustrating an electronic brake system according to a second embodiment of the present invention.
8 is a hydraulic circuit diagram illustrating an operation in the first normal mode of the electronic brake system according to the second embodiment of the present invention.
9 is a hydraulic circuit diagram illustrating an operation in a switching state of the electronic brake system according to the second embodiment of the present invention.
10 is a hydraulic circuit diagram illustrating an operation in the second normal mode of the electronic brake system according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein, and may be embodied in other forms. The drawings may omit the illustration of parts not related to the description in order to clarify the present invention, and slightly exaggerate the size of the components to help understanding.

1 is a hydraulic circuit diagram showing an electromagnetic brake system 1000 according to a first embodiment of the present invention.

Referring to FIG. 1 , the electronic brake system 1000 according to the first embodiment of the present invention includes a first block 100 including a master cylinder 1200 , a pedal simulator 1250 , and a hydraulic pressure supply device 1300 . and a second block 200 including a hydraulic control unit 1400 and spaced apart from the first block 100 , a plurality of electronic control units 300 , one end connected to the first block 100 and the other end It may be provided including a connection line 1600 connected to the second block 200 .

The first block 100 has a mechanical part connected and interlocked with the brake pedal 10 to provide a mechanical operation, and the second block 200 includes a valve and a sensor whose operation is controlled by an electronic control unit (ECU, 300). An electronically operated and controlled electronic part is disposed. The first block 100 and the second block 200 are disposed to be spaced apart from each other in the vehicle and may be hydraulically connected by a plurality of connection lines 1600, thereby improving the vehicle mountability of the electronic brake system 1000 and , and furthermore, by promoting the degree of freedom in the design of the vehicle, it is possible to efficiently arrange the space.

The mechanism unit includes parts and elements that perform a mechanical operation in conjunction with the brake pedal 10 irrespective of the control signal of the electronic control unit, and may be disposed in the first block 100 .

The first block 100 includes a main reservoir 1100a in which a pressurized medium such as brake oil is stored, and a master cylinder 1200 that pressurizes and discharges a pressurized medium such as brake oil accommodated inside according to the pedal effort of the brake pedal 10 . , main reservoir flow paths 1110a and 1120a connecting the main reservoir 1100a and the master cylinder 1200 may be included.

The master cylinder 1200 is configured to include at least one hydraulic chamber, and may pressurize and discharge an inner pressurizing medium. The master cylinder 1200 includes a first master chamber 1220a and a second master chamber 1230a, and a first master piston 1220 and a second master piston 1230 provided in each master chamber 1220a and 1230a. can be provided

The first master chamber 1220a may be formed on the inlet side (the right side of FIG. 1 ) of the cylinder block 1210 to which the brake pedal 10 is connected, and the first master piston 1220a has the first master chamber 1220a. 1220 may be accommodated reciprocally.

In the first master chamber 1220a, the pressurized medium may be introduced and discharged through the first hydraulic port 1280a and the second hydraulic port 1280b. The first hydraulic port 1280a is connected to a first main reservoir flow path 1110a to be described later to introduce a pressurized medium from the main reservoir 1100a to the first master chamber 1220a, and the front of the first hydraulic port 1280a A pair of sealing members may be provided on the (left side relative to FIG. 1) and rear (right side relative to FIG. 1) sides to seal the first master chamber 1220a. The second hydraulic port 1280b is connected to a first connection line 1610 to be described later so that the pressurized medium of the first master chamber 1220a is discharged to the first connection line 1610, or conversely, the first connection line 1610. A pressurized medium may be introduced into the first master chamber 1220a from the .

The first master piston 1220 is provided to be accommodated in the first master chamber 1220a, pressurizing the pressurizing medium accommodated in the first master chamber 1220a by moving forward, or moving backward in the first master chamber 1220a. It can create negative pressure. Specifically, when the first master piston 1220 moves forward, as the volume of the first master chamber 1220a decreases, the pressurizing medium present in the first master chamber 1220a is pressurized to form hydraulic pressure. . On the contrary, as the volume of the first master chamber 1220a increases when the first master piston 1220 moves backward, the pressurized medium present in the first master chamber 1220a may be decompressed, and at the same time, the first A negative pressure may be formed in the master chamber 1220a.

The second master chamber 1230a may be formed on the front side (left side with reference to FIG. 1) of the first master chamber 1220a on the cylinder block 1210, and the second master piston 1230a has the second master chamber 1230a. 1230 may be accommodated reciprocally.

In the second master chamber 1230a, the pressurized medium may be introduced and discharged through the third hydraulic port 1280c and the fourth hydraulic port 1280d. The third hydraulic port 1280c is connected to a second main reservoir flow path 1120a to be described later so that the pressurized medium flows from the main reservoir 1100a to the second master chamber 1230a, and the front of the third hydraulic port 1280c A pair of sealing members may be provided at (left based on FIG. 1 ) and rear (right side based on FIG. 1 ) to seal the second master chamber 1230a. The fourth hydraulic port 1280d is connected to a second connection line 420 to be described later so that the pressurized medium of the second master chamber 1230a is discharged to the second connection line 420 or, conversely, the second connection line 420 . A pressurized medium may be introduced from the to the second master chamber 1230a.

The second master piston 1230 is provided to be accommodated in the second master chamber 1230a, pressurizing the pressurizing medium accommodated in the second master chamber 1230a by moving forward, or moving backward in the second master chamber 1230a. It can create negative pressure. Specifically, when the second master piston 1230 moves forward, as the volume of the second master chamber 1230a decreases, the pressurizing medium present in the second master chamber 1230a is pressurized to form hydraulic pressure. . Conversely, when the second master piston 1230 moves backward, as the volume of the second master chamber 1230a increases, the pressurized medium present in the second master chamber 1230a may be decompressed, and at the same time 2 A negative pressure may be formed in the master chamber 1230a.

The first piston spring 1220b and the second piston spring 1230b are provided to elastically support the first master piston 1220 and the second master piston 1230, respectively. To this end, the first piston spring 1220b is disposed between the front surface (left end of FIG. 1 ) of the first master piston 1220 and the rear surface (right end of FIG. 1 ) of the second master piston 1230 . may be disposed, and the second piston spring 1230b may be disposed between the front surface (left end of FIG. 1 ) of the second master piston 1230 and the inner surface of the cylinder block 1210 . When displacement occurs in the first master piston 1220 and the second master piston 1230 according to an operation such as braking, the first piston spring 1220b and the second piston spring 1230b are compressed, respectively, and then braking, etc. When released by the operation of the first piston spring 1220b and the second piston spring 1230b expand by the elastic force, the first master piston 1220 and the second master piston 1230 may return to their original positions, respectively. .

The main reservoir 1100a may accommodate and store the pressurized medium therein. The main reservoir 1100a may be connected to component elements such as the master cylinder 1200 and a third connection line 1630 to be described later to supply or receive a pressurized medium.

The main reservoir 1100a may be provided by being divided into a plurality of chambers by a partition wall 1105a. The main reservoir 1100a may include a plurality of main reservoir chambers 1101a, 1102a, and 1103a, and the plurality of main reservoir chambers 1101a, 1102a, 1103a may be arranged side by side in a row. Specifically, the main reservoir 1100a includes a first main reservoir chamber 1101a disposed in the central portion, a second main reservoir chamber 1102a disposed at one side, and a third main reservoir chamber 1103a disposed at the other side. can be distinguished.

The partition walls 1105a may be provided between adjacent main reservoir chambers, respectively, and each partition wall 1105a may be provided with at least a portion of an upper end thereof open. Accordingly, the adjacent main reservoir chambers 1101a, 1102a, and 1103a communicate with each other so that the pressurized medium can move. For example, when a large amount of pressurized medium flows into the first main reservoir chamber 1101a, the pressurized medium passes through the upper end of the partition wall 1105a to the second main reservoir chamber 1102a or the third main reservoir chamber 1103a. can be transmitted.

The first main reservoir chamber 1101a may be connected to a third connection line 1630 to be described later to supply the pressurized medium to the sub-reservoir 1100b or to receive the pressurized medium from the sub-reservoir 1100b. Also, the second main The reservoir chamber 1102a is connected to a first main reservoir flow path 1110a to be described later, and the third main reservoir chamber 1103a is connected to a second main reservoir flow path 1120a to supply a pressurized medium to the master cylinder 1200 side. or can be delivered.

As described above, since the main reservoir 1100a is divided into the first to third main reservoir chambers 1101a, 1102a, and 1103a, the stable operation of the electronic brake system 1000 can be promoted. For example, if the main reservoir 1100a is formed as a single chamber and the capacity of the pressurized medium is not sufficient, it is impossible to stably supply the pressurized medium not only to the sub-reservoir 1100b but also to the master cylinder 1200 side. Accordingly, the first main reservoir chamber 1101a in which the main reservoir 1100a is connected to the sub-reservoir 1100b of the second block 200, and the second and third main reservoir chambers connected to the master cylinder 1200 side ( By separating 1102a and 1103a), even when the pressurized medium cannot be supplied to any one component element, the vehicle can be braked by supplying the pressurized medium to the other component element.

The main reservoir flow path is provided to hydraulically connect the master cylinder 1200 and the main reservoir 1100a.

The main reservoir flow path includes a first main reservoir flow path 1110a connecting the first master chamber 1220a and the second main reservoir chamber 1102a of the main reservoir 1100a, a second master chamber 1230a and the main reservoir ( It may include a second main reservoir flow path 1120a connecting the third main reservoir chamber 1103a of 1100a. To this end, one end of the first main reservoir flow path 1110a communicates with the first master chamber 1220a of the master cylinder 1200, and the other end communicates with the second main reservoir chamber 1102a of the main reservoir 1100a. One end of the second main reservoir flow path 1120a communicates with the second master chamber 1230a of the master cylinder 1200, and the other end communicates with the third main reservoir chamber 1103a of the main reservoir 1100a. have.

The electronic unit includes components that are electronically operated and controlled by a control signal of the electronic control unit (ECU, 300 ), and may be disposed in the second block ( 200 ).

The second block 200 includes a sub-reservoir 1100b that auxiliaryly stores a pressurized medium therein, a pedal simulator 1250 that provides a reaction force to the driver's pedal effort on the brake pedal 10 , and a displacement of the brake pedal 10 . The hydraulic pressure supplied by the hydraulic pressure supply device 1300 and the hydraulic pressure supply device 1300 for generating hydraulic pressure of the pressurized medium through mechanical operation by receiving the driver's braking intention as an electrical signal by the pedal displacement sensor 11 that detects and the first to fourth wheel cylinders 21, 22, 23, and 24, hydraulically connecting the hydraulic control unit 1400, the sub-reservoir 1100b, and the hydraulic pressure supply device 1300 for controlling the hydraulic pressure delivered to, but these A plurality of sub-reservoir flow paths 1710 and 1720 that connect the dump control unit 1800 for controlling the flow of the pressurized medium therebetween and the sub-reservoir 1100b to the first and second hydraulic circuits 1510 and 1520 and the dump control unit 1800 side. , 1730, 1740), a plurality of cut valves (411, 422a) provided in the connection line to control the flow of the pressurized medium, an inspection valve (1900) for inspecting a leak of the master cylinder 1200, a hydraulic pressure supply device ( It may include a circuit pressure sensor PS1 for detecting the hydraulic pressure of the pressurized medium provided by 1300 and a cylinder pressure sensor PS2 for detecting the hydraulic pressure of the second master chamber 1230a.

The electronic control unit 300 may receive electrical signals detected by various sensors, transmit electrical signals to various devices and components such as valves, and determine whether there is an abnormality.

For example, the electronic control unit 300 may determine whether the electronic control unit 300 is abnormal through signals detected by sensors such as the pedal displacement sensor 11 and the pressure sensors PS1 and PS2.

A plurality of electronic control units 300 may be provided to have a redundancy function. Specifically, the electronic control unit 300 may include a first electronic control unit 310 and a second electronic control unit 320 , and the first electronic control unit 310 normally controls various devices and valves. and the second electronic control unit 320 may operate to control various devices and valves on behalf of the first electronic control unit 310 when the first electronic control unit 310 operates abnormally. That is, when the first electronic control unit 310 operates abnormally, the sensor recognizes whether there is an abnormality, blocks the signal of the first electronic control unit 310, and the second electronic control unit 320 controls various devices and valves. can act to control.

The sub-reservoir 1100b may be disposed in the second block 200 to auxiliaryly store a pressurized medium. As the second block 200 by the sub-reservoir 1100b also stores the pressurized medium auxiliary, the hydraulic pressure supply device 1300, the dump control unit 1800, the first and second hydraulic circuits 1510, 1520, etc. Even within the block 200, the pressurized medium may be smoothly supplied and delivered.

The sub-reservoir 1100b may be connected to the main reservoir 1100a of the first block 100 by a third connection line 1630 to be described later. In addition, the sub-reservoir 1100b may be respectively connected to the first hydraulic circuit 1510 and the second hydraulic circuit 1520 by a first sub-reservoir flow path 1710 and a second sub-reservoir flow path 1720 to be described later, The third sub-reservoir passage 1730 and the fourth sub-reservoir passage 1740 may be connected to the dump control unit 1800 .

The hydraulic pressure supply device 1300 is provided to generate hydraulic pressure of the pressurized medium through mechanical operation by receiving the driver's braking intention as an electrical signal from the pedal displacement sensor 11 that detects the displacement of the brake pedal 10 .

The hydraulic pressure supply device 1300 includes a hydraulic pressure supply unit that provides the pressurized medium pressure transmitted to the wheel cylinder 20 , a motor (not shown) that generates a rotational force by an electrical signal of the pedal displacement sensor 11 , and the motor It may include a power conversion unit (not shown) that converts the rotational motion into a linear motion and transmits it to the hydraulic pressure providing unit.

The hydraulic pressure providing unit includes a cylinder block 1310 in which a pressurized medium is accommodated, a hydraulic piston 1320 accommodated in the cylinder block 1310, and a pressure chamber provided between the hydraulic piston 1320 and the cylinder block 1310 . It includes a sealing member 1350 for sealing the parts 1330 and 1340 and a driving shaft 1390 for transmitting the power output from the power conversion unit to the hydraulic piston 1320 .

The pressure chambers 1330 and 1340 are a first pressure chamber 1330 located in the front (left direction of the hydraulic piston 1320 with reference to FIG. 1) of the hydraulic piston 1320, and the rear of the hydraulic piston 1320 ( A second pressure chamber 1340 positioned in the right direction of the hydraulic piston 1320 with reference to FIG. 1 may be included. That is, the first pressure chamber 1330 is partitioned by the front surface of the cylinder block 1310 and the hydraulic piston 1320 and is provided so that the volume varies according to the movement of the hydraulic piston 1320 , and the second pressure chamber 1340 . ) is partitioned by the rear surface of the cylinder block 1310 and the hydraulic piston 1320 so that the volume varies according to the movement of the hydraulic piston 1320 .

The first pressure chamber 1330 is connected to a first hydraulic flow passage 1401 to be described later through a first communication hole formed in the cylinder block 1310 , and the second pressure chamber 1340 is formed in the cylinder block 1310 . It is connected to a second hydraulic flow passage 1402 to be described later through a second communication hole.

The sealing member includes a piston sealing member 1350a provided between the hydraulic piston 1320 and the cylinder block 1310 to seal between the first pressure chamber 1330 and the second pressure chamber 1340, the drive shaft 1390 and the cylinder A drive shaft sealing member 1350b provided between the blocks 1310 and sealing the openings of the second pressure chamber 1340 and the cylinder block 1310 is included. The hydraulic pressure or negative pressure of the first pressure chamber 1330 and the second pressure chamber 1340 generated by the forward or backward movement of the hydraulic piston 1320 is sealed by the piston sealing member 1350a and the drive shaft sealing member 1350b. It may be transmitted to the first hydraulic flow path 1401 and the second hydraulic flow path 1402 to be described later without leakage. In addition, a chamber sealing member 1350c may be provided between the second pressure chamber 1340 and the driving shaft sealing member 1350b, and the chamber sealing member 1350c is provided with a second pressure through an auxiliary inflow passage 1850 to be described later. The flow of the pressurized medium flowing into the chamber 1340 is allowed, but the flow of the pressurized medium leaking from the second pressure chamber 1340 to the auxiliary inflow passage 1850 may be blocked.

A motor (not shown) is provided to generate a driving force of the hydraulic piston 1320 by an electrical signal output from the electronic control unit 300 . The motor may be provided including a stator and a rotor, and may provide power for generating displacement of the hydraulic piston 1320 by rotating in a forward or reverse direction through this. The rotation angular speed and rotation angle of the motor can be precisely controlled by the motor control sensor. Since the motor is a well-known technology, a detailed description thereof will be omitted.

The power conversion unit (not shown) is provided to convert the rotational force of the motor into linear motion. The power conversion unit may be provided in a structure including, for example, a worm shaft (not shown), a worm wheel (not shown), and a drive shaft 1390 .

The worm shaft may be integrally formed with the rotation shaft of the motor, and a worm may be formed on the outer circumferential surface to rotate the worm wheel by engaging with the worm wheel. The worm wheel is connected to engage the drive shaft 1390 to move the drive shaft 1390 in a straight line, and the drive shaft 1390 is connected to the hydraulic piston 1320 to operate integrally. Through this, the hydraulic piston 1320 is a cylinder It may be slidably moved within the block 1310 .

In describing the above operations again, when a displacement of the brake pedal 10 is detected by the pedal displacement sensor 11 , the detected signal is transmitted to the electronic control unit 300 , and the electronic control unit 300 drives the motor to rotate the worm shaft in one direction. The rotational force of the worm shaft is transmitted to the drive shaft 1390 via the worm wheel, and the hydraulic piston 1320 connected to the drive shaft 1390 advances in the cylinder block 1310 to generate hydraulic pressure in the first pressure chamber 1330. have.

Conversely, when the pedal effort of the brake pedal 10 is released, the electronic control unit 300 drives the motor to rotate the worm shaft in the opposite direction. Accordingly, the worm wheel may also rotate in the opposite direction and the hydraulic piston 1320 connected to the drive shaft 1390 may generate negative pressure in the first pressure chamber 1330 while moving backward in the cylinder block 1310 .

The generation of hydraulic pressure and negative pressure in the second pressure chamber 1340 may be implemented by operating in opposite directions. That is, when displacement of the brake pedal 10 is detected by the pedal displacement sensor 11, the detected signal is transmitted to the electronic control unit 300, and the electronic control unit 300 drives the motor to reverse the worm shaft. rotate in the direction The rotational force of the worm shaft is transmitted to the drive shaft 1390 via the worm wheel, and the hydraulic piston 1320 connected to the drive shaft 1390 moves backward in the cylinder block 1310 to generate hydraulic pressure in the second pressure chamber 1340. have.

Conversely, when the pedal effort of the brake pedal 10 is released, the electronic control unit drives the motor in one direction to rotate the worm shaft in one direction. Accordingly, the worm wheel also rotates in the opposite direction and the hydraulic piston 1320 connected to the drive shaft 1390 advances in the cylinder block 1310 to generate negative pressure in the second pressure chamber 1340 .

As such, the hydraulic pressure supply device 1300 may generate hydraulic pressure or negative pressure in the first pressure chamber 1330 and the second pressure chamber 1340, respectively, depending on the rotation direction of the worm shaft by driving the motor. It can be determined by controlling the valves whether to implement the braking by using a negative pressure or to release the braking by using the negative pressure.

On the other hand, the power conversion unit according to the present embodiment is not limited to any one structure as long as it can convert the rotational motion of the motor into the linear motion of the hydraulic piston 1320, and it is understood the same even if it consists of devices of various structures and methods. it should be

The hydraulic pressure supply device 1300 may be hydraulically connected to the sub-reservoir 1100b by the dump control unit 1800 . The dump control unit 1800 includes a first dump control unit for controlling the flow of the pressurized medium between the first pressure chamber 1330 and the sub-reservoir 1100b, and the pressure between the second pressure chamber 1340 and the sub-reservoir 1100b. It may include a second dump control unit for controlling the flow of the medium. The first dump control unit includes a first dump flow path 1810 connecting the first pressure chamber 1330 and the sub-reservoir 1100b, and a first bypass flow path 1830 that branches off and rejoins on the first dump flow path 1810 . ), and the second dump control unit is a second dump flow path 1820 connecting the second pressure chamber 1340 and the sub-reservoir 1100b, and a second rejoined after branching on the second dump flow path 1820 . A bypass flow path 1840 may be included.

A first dump check valve 1811 and a first dump valve 1831 for controlling the flow of the pressurized medium may be provided in the first dump flow path 1810 and the first bypass flow path 1830 , respectively. The first dump check valve 1811 may be provided to allow only the flow of the pressurized medium from the sub-reservoir 1100b to the first pressure chamber 1330, and block the flow of the pressurized medium in the opposite direction. A first bypass flow path 1830 is connected in parallel to the first dump check valve 1811 to 1810 , and a first bypass flow path 1830 is provided between the first pressure chamber 1330 and the sub-reservoir 1100b. A first dump valve 1831 for controlling the flow of the pressurized medium may be provided. In other words, the first bypass flow path 1830 may be connected by bypassing the front and rear ends of the first dump check valve 1811 on the first dump flow path 1810 , and the first dump valve 1831 is the first pressure It may be provided as a two-way solenoid valve that controls the flow of the pressurized medium between the chamber 1330 and the sub-reservoir 1100b. The first dump valve 1831 may be provided as a normally closed type solenoid valve that is normally closed and operates to open when an electrical signal is received from the electronic control unit.

A second dump check valve 1821 and a second dump valve 1841 for controlling the flow of the pressurized medium may be provided in the second dump flow path 1820 and the second bypass flow path 1840 , respectively. The second dump check valve 1821 may be provided to allow only the flow of the pressurized medium from the sub-reservoir 1100b to the second pressure chamber 1330, and block the flow of the pressurized medium in the opposite direction. A second bypass flow path 1840 is connected in parallel to the second dump check valve 1821 to 1820 , and a second bypass flow path 1840 is provided between the second pressure chamber 1330 and the sub-reservoir 1100b. A second dump valve 1841 for controlling the flow of the pressurized medium may be provided. In other words, the second bypass flow path 1840 may be connected by bypassing the front and rear ends of the second dump check valve 1821 on the second dump flow passage 1820 , and the second dump valve 1841 is the second pressure It may be provided as a two-way solenoid valve that controls the flow of the pressurized medium between the chamber 1330 and the sub-reservoir 1100b. The second dump valve 1841 may be provided as a normally open type solenoid valve that is normally open and operates to close when an electrical signal is received from the electronic control unit.

In addition, the dump control unit 1800 may include an auxiliary inflow passage 1850 connecting the sub-reservoir 1100b and the second pressure chamber 1340 to fill the second pressure chamber 1340 with a pressurized medium. The auxiliary inflow passage 1850 may be connected to the rear (right side with reference to FIG. 1 ) of the chamber sealing member 1350c on the cylinder body 1310 . Accordingly, the pressurized medium is introduced into the second pressure chamber 1340 from the sub-reservoir 1100b through the auxiliary inflow passage 1850, and the second pressure chamber 1340 through the auxiliary inflow passage (1340) by the chamber sealing member 1350c. 1850), the flow of the leaking pressurized medium can be blocked.

The hydraulic control unit 1400 may be provided to control the hydraulic pressure transmitted to each wheel cylinder 20 , and the electronic control unit (ECU) is configured to operate with the hydraulic pressure supply device 1300 and various types based on the hydraulic pressure information and the pedal displacement information. provided to control the valves.

The hydraulic control unit 1400 includes a second hydraulic circuit 1520 for controlling the flow of hydraulic pressure transmitted to the first and second wheel cylinders 21 and 22 among the four wheel cylinders 20, and the third and third A first hydraulic circuit 1510 for controlling the flow of hydraulic pressure transferred to the four wheel cylinders 23 and 24 may be provided, and a plurality of hydraulic pressure supplies to control the hydraulic pressure transferred from the hydraulic pressure supply device 1300 to the wheel cylinder 20 . of flow paths and valves.

The first hydraulic flow path 1401 may be provided to communicate with the first pressure chamber 1330 , and the second hydraulic flow path 1402 may be provided to communicate with the second pressure chamber 1340 . After the first hydraulic oil passage 1401 and the second hydraulic oil passage 1402 merge into the third hydraulic oil passage 1403 , the fourth hydraulic oil passage 1404 connected to the second hydraulic circuit 1520 and the first hydraulic pressure It may be provided by branching back to the fifth hydraulic flow path 1405 connected to the circuit 1510 .

The sixth hydraulic oil passage 1406 is provided to communicate with the second hydraulic circuit 1520 , and the seventh hydraulic oil passage 1407 is provided to communicate with the first hydraulic circuit 1510 . After the sixth and seventh hydraulic passages 1406 and 1407 merge into the eighth hydraulic passage 1408 , the ninth hydraulic passage 1409 communicating with the first pressure chamber 1330 and the second pressure It may be provided by branching back to the tenth hydraulic flow path 1410 communicating with the chamber 1340 .

A first valve 1431 for controlling the flow of the pressurized medium may be provided in the first hydraulic flow path 1401 . The first valve 1431 may be provided as a check valve that allows the flow of the pressurized medium discharged from the first pressure chamber 1330 but blocks the flow of the pressurized medium in the opposite direction. In addition, a second valve 1432 for controlling the flow of the pressurized medium may be provided in the second hydraulic flow path 1402 , and the second valve 1432 is the flow of the pressurized medium discharged from the second pressure chamber 1340 . However, it may be provided as a check valve that blocks the flow of the pressurized medium in the opposite direction.

The fourth hydraulic oil passage 1404 is branched again from the third hydraulic oil passage 1403 where the first hydraulic oil passage 1401 and the second hydraulic oil passage 1402 join, and is connected to the second hydraulic circuit 1520 . A third valve 1433 for controlling the flow of the pressurized medium may be provided in the fourth hydraulic flow path 1404 . The third valve 1433 may be provided as a check valve that allows only the flow of the pressurized medium from the third hydraulic flow path 1403 to the second hydraulic circuit 1520 and blocks the pressurized medium flow in the opposite direction.

The fifth hydraulic oil passage 1405 is branched again from the third hydraulic oil passage 1403 where the first hydraulic oil passage 1401 and the second hydraulic oil passage 1402 join, and is connected to the first hydraulic circuit 1510 . A fourth valve 1434 for controlling the flow of the pressurized medium may be provided in the fifth hydraulic flow path 1405 . The fourth valve 1434 may be provided as a check valve that allows only the flow of the pressurized medium from the third hydraulic flow path 1403 to the first hydraulic circuit 1510 and blocks the pressurized medium flow in the opposite direction.

The sixth hydraulic oil passage 1406 communicates with the second hydraulic circuit 1520, the seventh hydraulic oil passage 1407 communicates with the first hydraulic circuit 1510, and is provided to merge into the eighth hydraulic oil passage 1408. . A fifth valve 1435 for controlling the flow of the pressurized medium may be provided in the sixth hydraulic flow path 1406 . The fifth valve 1435 may be provided as a check valve that allows only the flow of the pressurized medium discharged from the second hydraulic circuit 1520 and blocks the flow of the pressurized medium in the opposite direction. In addition, a sixth valve 1436 for controlling the flow of the pressurized medium may be provided in the seventh hydraulic flow path 1407 . The sixth valve 1436 may be provided as a check valve that allows only the flow of the pressurized medium discharged from the first hydraulic circuit 1510 and blocks the flow of the pressurized medium in the opposite direction.

The ninth hydraulic flow path 1409 is branched from the eighth hydraulic flow path 1408 where the sixth and seventh hydraulic flow paths 1406 and 1407 join and is connected to the first pressure chamber 1330 . A seventh valve 1437 for controlling the flow of the pressurized medium may be provided in the ninth hydraulic flow path 1409 . The seventh valve 1437 may be provided as a two-way control valve for controlling the flow of the pressurized medium transmitted along the ninth hydraulic flow path 1409 . The seventh valve 1437 may be provided as a normally closed type solenoid valve that is normally closed and operates to open when an electrical signal is received from the electronic control unit.

The tenth hydraulic flow path 1410 is branched from the eighth hydraulic flow path 1408 where the sixth hydraulic flow path 1406 and the seventh hydraulic flow path 1407 join and is connected to the second pressure chamber 1340 . An eighth valve 1438 for controlling the flow of the pressurized medium may be provided in the tenth hydraulic flow path 1410 . The eighth valve 1438 may be provided as a two-way control valve for controlling the flow of the pressurized medium transmitted along the tenth hydraulic flow path 1410 . Like the seventh valve 1437, the eighth valve 1438 is a normally closed solenoid valve that operates to open when receiving an electrical signal from the electronic control unit after being normally closed. can be

The hydraulic control unit 1400 has the hydraulic pressure formed in the first pressure chamber 1330 according to the advance of the hydraulic piston 1320 by the arrangement of the hydraulic oil passages and valves in the first hydraulic passage 1401, the third hydraulic passage ( 1403) and the fourth hydraulic passage 1404 may be sequentially transmitted to the second hydraulic circuit 1520, and sequentially pass through the first hydraulic passage 1401 and the fifth hydraulic passage 1405 to the first hydraulic circuit. (1510). In addition, the hydraulic pressure formed in the second pressure chamber 1340 according to the backward movement of the hydraulic piston 1320 is transferred to the second hydraulic circuit 1520 through the second hydraulic passage 1402 and the fourth hydraulic passage 1404 in sequence. and may be transmitted to the first hydraulic circuit 1510 through the second hydraulic oil passage 1402 , the third hydraulic oil passage 1403 , and the fifth hydraulic oil passage 1405 in sequence.

Conversely, the negative pressure formed in the first pressure chamber 1330 according to the backward movement of the hydraulic piston 1320 causes the pressurized medium provided to the second hydraulic circuit 1520 to pass through the sixth hydraulic passage 1406, the eighth hydraulic oil passage 1408, The ninth hydraulic passage 1409 may be sequentially recovered to the first pressure chamber 1330 , and the pressurized medium provided to the first hydraulic circuit 1510 may be transferred to the seventh hydraulic passage 1407 and the eighth hydraulic oil passage 1408 . , may be recovered to the first pressure chamber 1330 through the ninth hydraulic flow path 1409 sequentially. In addition, the negative pressure formed in the second pressure chamber 1340 according to the advance of the hydraulic piston 1320 causes the pressurized medium provided to the second hydraulic circuit 1520 to pass through the sixth hydraulic passage 1406, the eighth hydraulic passage 1408, and the second pressure medium. The 10 hydraulic flow path 1410 can be sequentially recovered to the first pressure chamber 1340, and the pressurized medium provided to the first hydraulic circuit 1510 is transferred to the 7th hydraulic flow path 1407, the 8th hydraulic flow path 1408, It may be recovered to the second pressure chamber 1340 through the tenth hydraulic flow path 1410 sequentially.

The second hydraulic circuit 1520 of the hydraulic control unit 1400 is the hydraulic pressure of the first and second wheel cylinders 21 and 22, which are two wheel cylinders 20 among the four wheels RR, RL, FR, and FL. , and the first hydraulic circuit 1510 may control the hydraulic pressures of the third and fourth wheel cylinders 23 and 24 that are the other two wheel cylinders 20 .

The second hydraulic circuit 1520 may receive hydraulic pressure through the fourth hydraulic passage 1404 and discharge hydraulic pressure through the sixth hydraulic passage 1406 . To this end, as shown in FIG. 1 , the fourth hydraulic oil passage 1404 and the sixth hydraulic oil passage 1406 merge, and then two passages connected to the first wheel cylinder 21 and the second wheel cylinder 22 . It may be provided by branching into . In addition, the first hydraulic circuit 1510 may receive hydraulic pressure through the fifth hydraulic passage 1405 and discharge the hydraulic pressure through the seventh hydraulic passage 1407, and accordingly, as shown in FIG. After the 5 hydraulic flow path 1405 and the 7th hydraulic flow path 1407 merge, it may be provided by branching into two flow paths connected to the third wheel cylinder 23 and the fourth wheel cylinder 24 . However, the connection of the hydraulic flow path shown in FIG. 1 is an example for helping understanding of the present invention, and the structure is not limited thereto. It is connected to the circuit 1520 side, and can be branched and connected independently to the first wheel cylinder 21 and the second wheel cylinder 22, and similarly, the fifth hydraulic oil passage 1405 and the seventh hydraulic oil passage 1407. It should be understood the same even when connected in various ways and structures, such as each connected to the first hydraulic circuit 1510 side, and independently branched and connected to the third wheel cylinder 23 and the fourth wheel cylinder 24 something to do.

The first and second hydraulic circuits 1510 and 1520 have first to fourth inlet valves 1511a and 1511b for controlling the flow of the pressurized medium toward the first to fourth wheel cylinders 21, 22, 23, and 24, respectively. , 1521a, 1521b) may be included. The first to fourth inlet valves 1511a, 1511b, 1521a, and 1521b are respectively disposed on the upstream sides of the first to fourth wheel cylinders 21, 22, 23 and 24, and are normally open and then electronically controlled. It may be provided as a solenoid valve of a normally open type that operates to close the valve when receiving an electrical signal from the unit 300 .

The first and second hydraulic circuits 1510 and 1520 are first to fourth check valves 1513a, 1513b, 1523a provided in parallel to the first to fourth inlet valves 1511a, 1511b, 1521a, and 1521b. , 1523b) may include. The first to fourth check valves 1513a, 1513b, 1523a, and 1523b are front and rear of the first to fourth inlet valves 1511a, 1511b, 1521a, 1521b on the first and second hydraulic circuits 1510 and 1520. may be provided in a bypass flow path connecting The first to fourth check valves 1513a, 1513b, 1523a, and 1523b can quickly release the hydraulic pressure of the pressurized medium applied to each wheel cylinder, and the first to fourth inlet valves 1511a, 1511b, 1521a, 1521b ) does not operate normally, the hydraulic pressure of the pressurized medium applied to the wheel cylinder can be smoothly discharged.

The second hydraulic circuit 1520 may include first and second outlet valves 1522a and 1522b for controlling the discharge of the pressurized medium to improve performance when the first and second wheel cylinders 21 and 22 are braked off. can The first and second outlet valves 1522a and 1522b sense the braking pressure of the first and second wheel cylinders 21 and 22 and are selectively opened when pressure reduction braking is required, such as in ABS dump mode, to selectively open the first and second wheels. The pressurized medium applied to the cylinders 21 and 22 may be discharged to the sub-reservoir 1100b through a second sub-reservoir flow path 1720 to be described later. The first and second outlet valves 1522a and 1512b are normally closed and are normally closed type solenoid valves that operate to open the valve when receiving an electrical signal from the electronic control unit 300 can be

The first hydraulic circuit 1510 may include third and fourth outlet valves 1512a and 1512b for controlling the discharge of the pressurized medium to improve performance when the third and fourth wheel cylinders 23 and 24 are released from braking. can The third and fourth outlet valves 1512a and 1512b sense the braking pressure of the third and fourth wheel cylinders 23 and 24 and are selectively opened when pressure reduction braking such as ABS dump mode is required to selectively open the third and fourth wheels The pressurized medium applied to the cylinders 23 and 24 may be discharged to the sub-reservoir 1100b through a first sub-reservoir flow path 1710 to be described later. The third and fourth outlet valves 1512a and 1512b are normally closed and are normally closed type solenoid valves that operate to open when receiving an electrical signal from the electronic control unit 300 . can be

The outlet passage 1530 may be provided to connect the first hydraulic circuit 1510 and the sub-reservoir 1100b to control the discharge of the pressurized medium from the third and fourth wheel cylinders 23 and 24 . A first cut valve 1531 for controlling the discharge of the pressurized medium may be provided in the outlet flow path 1530 . The first cut valve 1531 may be provided as a normally open type solenoid valve that is normally open and operates to close the valve when receiving an electrical signal from the electronic control unit 300 .

In the normal operating mode, which is a general braking situation, the first cut valve 1531 is controlled to be closed, so that the pressurized medium supplied to the first hydraulic circuit 1510 does not leak to the sub-reservoir 110b and the third and fourth It can be stably supplied to the wheel cylinders (23, 24).

The pedal simulator 1250 is provided to provide a reaction force to the driver's pedal effort for operating the brake pedal 10 .

The pedal simulator 1250 has a front end connected to a first connection line 1610 to be described later, and a rear end connected to the sub-reservoir 1100b through a simulator discharge passage 1251 .

The pedal simulator 1250 includes a simulation piston 1252a that is provided to be displaceable by a pressurized medium introduced through the first connection line 1610, and the volume is changed by displacement of the simulation piston 1252a, and the simulator discharges at the rear end. It includes a simulation chamber 1252b communicating with the flow path 1251 and a simulation spring 1252c elastically supporting the simulation piston 1252a.

The simulation piston 1252a is provided to be displaceable in the simulation chamber 1252b by the pressurized medium introduced through the first connection line 1610 . Specifically, the hydraulic pressure of the pressurized medium flowing in through the first connection line 1610 is transmitted to the front surface (the right side with reference to FIG. 1) of the simulation piston 1252a, and displacement occurs in the simulation piston 1252a, As the volume of the simulation chamber 1252b formed on the rear surface (left side with reference to FIG. 1) of the simulation piston 1252a by the displacement of the simulation piston 1252a decreases, the pressurized medium accommodated in the simulation chamber 1252b decreases. It may be supplied to the sub-reservoir 1100b through the simulator discharge passage 1251 . The simulation spring 1252c is compressed according to the displacement of the simulation piston 1252a by elastically supporting the simulation piston 1252a, and an elastic restoring force for this may be provided to the driver as a pedal feeling.

Meanwhile, in the drawings, as an example, the simulation spring 1252c is illustrated as a coil spring, but in addition to providing an elastic force to the simulation piston 1252a and providing an elastic restoring force, various structures may be formed. For example, it may be made of a material such as rubber, or may be made of various members capable of storing elastic force such as a leaf spring.

The simulator discharge passage 1251 may be connected to the rear end of the pedal simulator 1250 so that one end communicates with the simulation chamber 1252b and the other end joins a first sub-reservoir passage 1710 to be described later. By connecting the simulation chamber 1252b and the sub-reservoir 1100b through this, the pressurized medium discharged from the simulation chamber 1252b is supplied to the sub-reservoir 1100b, or conversely, from the sub-reservoir 1100b to the simulation chamber 1252b. A pressurized medium may be supplied.

The operation of the pedal simulator 1250 will be described. When the driver operates the brake pedal 10 to apply a pedal force, the first master piston 1220 advances and the pressurized medium in the first master chamber 1220a is transferred to the first connection line. It is supplied and pressed to the front surface of the simulation piston 1252a via 1610 . Accordingly, while displacement occurs in the simulation piston 1252a, the simulation spring 1252c is compressed, and the elastic restoring force of the simulation spring 1252c may be provided to the driver as a pedal feeling. At this time, the pressurized medium filled in the simulation chamber 1252b is transferred to the sub-reservoir 1100b through the simulator discharge passage 1251 and the first sub-reservoir passage 1710 . After that, when the driver releases the pedaling force of the brake pedal 10, the simulation spring 1252c expands by the elastic restoring force, the simulation piston 1252a returns to its original position, and the pressurizing medium that presses the front surface of the simulation piston 1252a returns to the first master chamber 1220a through the first connection line 1610 . The simulation chamber 1252b is supplied with a pressurized medium from the sub-reservoir 1100b through the first sub-reservoir flow path 1710 and the simulator discharge path 1251 sequentially, so that the inside of the simulation chamber 1252b is filled with the pressurized medium again. can

As such, since the inside of the simulation chamber 1252b is always filled with a pressurized medium, the friction of the simulation piston 1252a is minimized when the pedal simulator 1250 is operated, so that the durability of the pedal simulator 1250 is improved as well as the external The inflow of foreign substances may be blocked.

In addition, the pedal simulator 1250 of the present invention is connected to the first master chamber 1220a through the first connection line 1610 to form a feeling of pedal, but since it does not include a simulator valve, the electronic control unit 300 operates normally. In case of operation or abnormal operation, a feeling of pedal can always be formed. Furthermore, since the pedal simulator 1250 can maintain the pedal feeling to the driver even at the moment of the switching operation when the first electronic control unit 310 abnormally operates and the second electronic control unit 320 is switched to, discomfort due to kickback There are advantages to reducing

Meanwhile, the sub-reservoir 1100b may be provided by being partitioned into a plurality of chambers by a partition wall 1105b. The sub-reservoir 1100b includes a plurality of sub-reservoir chambers 1101b, 1102b, and 1103b, and the plurality of sub-reservoir chambers 1101b, 1102b, and 1103b may be arranged side by side in a row. Specifically, the sub-reservoir 1100b includes a first sub-reservoir chamber 1101b disposed in the central portion, a second sub-reservoir chamber 1102b disposed at one side, and a third sub-reservoir chamber 1103b disposed at the other side. can be distinguished.

The partition walls 1105b may be provided between adjacent sub-reservoir chambers, and each partition wall 1105b may be provided with at least a portion of an upper end thereof open. Accordingly, the adjacent sub-reservoir chambers 1101b, 1102b, and 1103b communicate with each other so that the pressurized medium can move. For example, when a large amount of pressurized medium flows into the first sub-reservoir chamber 1101b, the pressurized medium passes through the upper end of the partition wall 1105b to the second sub-reservoir chamber 1102b or the third sub-reservoir chamber 1103b. can be transmitted.

The first sub-reservoir chamber 1101b and the third sub-reservoir chamber 1103b may be connected to the first dump controller and the second dump controller, respectively, and the second sub-reservoir chamber 1102b is connected to a third connection line 1630 to be described later. ) and the first and second hydraulic circuits 1510 and 1520, the pressurized medium may be transmitted to each other.

As described above, since the sub-reservoir 1100b is divided into the first to third sub-reservoir chambers 1101b, 1102b, and 1103b, the stable operation of the electronic brake system 1000 can be promoted. As an example, when the sub-reservoir 1100b is formed as a single chamber and the capacity of the pressurized medium is not sufficient, it is possible to stably supply the pressurized medium not only to the main reservoir 1100a, but also to the dump control unit 1800 and the hydraulic pressure supply device 1300. becomes impossible Therefore, by providing the sub-reservoir 1100b by separating the first to third sub-reservoir chambers 1101b, 1102b, and 1103b, even when the pressurized medium cannot be supplied to any one component element, the pressurized medium is supplied to another component element. Vehicle braking can be implemented.

The sub-reservoir flow path is provided to hydraulically connect the first hydraulic circuit 1510 , the second hydraulic circuit 1520 , and the hydraulic pressure supply device 1300 to the sub-reservoir 1100b. The sub-reservoir flow path includes a first sub-reservoir flow path 1710 connecting the sub-reservoir 1100b and the rear end of the first hydraulic circuit 1510, and a sub-reservoir 1100b connecting the rear end of the second hydraulic circuit 1520. The second sub-reservoir flow path 1720, the third sub-reservoir flow path 1730 connecting the sub-reservoir 1100b and the first dump control unit, and the fourth sub-reservoir connecting the sub-reservoir 1100b and the second dump control unit A flow path 1740 may be included.

The first sub-reservoir flow path 1710 has one end connected to the second sub-reservoir chamber 1102b of the sub-reservoir 1100b and the third and fourth outlet valves 1522a and 1522b of the first hydraulic circuit 1510 at the other end. ) is connected to the downstream side, and the simulator discharge passage 1251 may join at the middle portion. In addition, the second sub-reservoir flow path 1720 has one end connected to the second sub-reservoir chamber 1102b of the sub-reservoir 1100b, and the other end of the first and second outlet valves 1512a of the second hydraulic circuit 1520, 1512b) downstream. In addition, the third sub-reservoir flow path 1730 has one end connected to the third sub-reservoir chamber 1103b of the sub-reservoir 1100b, the other end connected to the first dump controller side, and a fourth sub-reservoir flow path 1740 . may have one end connected to the first sub-reservoir chamber 1101b of the sub-reservoir 1100b and the other end connected to the second dump controller side.

The inspection valve 1900 is provided to diagnose or determine whether the master cylinder 1200 has a leak. The inspection valve 1900 may be provided at the front end of the pedal simulator 1250 on a first connection line 1610 to be described later to control the flow of the pressurized medium. The inspection valve 1900 may inspect whether the master cylinder 1200 is leaking by blocking the discharge of the pressurized medium from the first master chamber 1220a through the first connection line 1610 in the inspection mode. To this end, the inspection valve 1900 may be provided as a normally open type solenoid valve that operates to open when receiving an electrical signal from the electronic control unit after being normally open.

The second block 200 is a circuit pressure sensor (PS1) for detecting the hydraulic pressure of the pressurized medium provided by the hydraulic pressure supply device (1300), and a cylinder pressure sensor (PS2) for detecting the hydraulic pressure of the second master chamber (1230a) may include The circuit pressure sensor PS1 is provided on the side of the first hydraulic circuit 1510 , and can sense the hydraulic pressure of the pressurized medium generated and provided from the hydraulic pressure supply device 1300 and transmitted to the first hydraulic circuit 1510 , and the cylinder The pressure sensor PS2 may be provided between the second master chamber 1230a and the second cut valve 1621 on a second connection line 1620 to be described later to detect the hydraulic pressure of the pressurized medium in the second master chamber 1230a. . Information on the pressure value of the pressurized medium detected by the circuit pressure sensor PS1 and the cylinder pressure sensor PS2 may be transmitted to the electronic control unit 300, and the electronic control unit 300 is detected by the circuit pressure sensor PS1 Based on one hydraulic pressure value and the hydraulic pressure value sensed by the cylinder pressure sensor PS2, the inspection mode may be performed or vehicle driving or braking information may be acquired.

In addition, the second block 200 includes a first cut valve 1531 provided in the outlet flow path 1530 to control the flow of the pressurized medium, and a second block 200 provided to the second connection line 1620 to control the flow of the pressurized medium. A cut valve 1621 may be included. A detailed description thereof will be provided later.

The connection line 1600 is provided to connect the first block 100 and the second block 200 spaced apart from each other.

The connection line 1600 is a first connection line 1610 connecting the master cylinder 1200 of the first block 100 to the pedal simulator 1250 side of the hydraulic control unit 1400, and the master cylinder 1200. The second connection line 1620 connected to the second hydraulic circuit 1520 side of the hydraulic control unit 1400, the main reservoir 1100a of the first block 100, and the sub-reservoir of the second block 200 ( 1100b) may include a third connection line 1630 connecting them to each other.

One end of the first connection line 1610 may be connected to the first master chamber 1220a of the master cylinder 1200 , and the other end may be connected to the front end of the pedal simulator 1250 .

The second connection line 1620 has one end connected to the second master chamber 1230a of the master cylinder 1200 and the other end downstream of the first and second inlet valves 1511a and 1512a of the second hydraulic circuit 1520 . Alternatively, it may be connected to the rear end side.

A second cut valve 1621 may be provided in the second connection line 1620 to control the flow of the pressurized medium between the second master chamber 1230a of the master cylinder 1200 and the second hydraulic circuit 1520 . The second cut valve 1621 may be provided as a normally open type solenoid valve that is normally open and operates to close the valve when a closing signal is received from the electronic control unit 300 .

In the normal operation mode, which is a general braking situation, the second cut valve 1621 is controlled to be closed, so that the pressurized medium accommodated in the second master chamber 1230a is applied to the second hydraulic circuit ( 1520) is not transmitted to the side. In addition, in the normal operation mode, the second cut valve 1621 is controlled to be closed, so that the hydraulic pressure of the pressurized medium provided from the hydraulic pressure supply device 1300 leaks toward the master cylinder 1200 along the second connection line 1620 . It can be stably supplied toward the wheel cylinders (21, 22, 23, 24).

However, in the fallback mode, which is switched when the electronic control unit 300 becomes inoperable, the second cut valve 1621 is placed in an open state, and thus the pressurized medium discharged from the second master chamber 1230a of the master cylinder 1200 . is supplied to the first and second wheel cylinders 21 and 22 through the second connection line 1620 to implement braking.

The third connection line 1630 may have one end communicating with the main reservoir 1100a and the other end communicating with the sub-reservoir 1100b. The third connection line 1630 allows the transfer of the pressurized medium between the reservoirs when the pressurized medium is excessively large or small in the reservoir on one side, thereby promoting the smooth supply of the pressurized medium to each component element.

The first connection line 1610 and the second connection line 1620 may be provided as a pipe having a predetermined strength, and the third connection line 1630 may be provided as a hose having elasticity. The first connection line 1610 and the second connection line 1620 are the first and second master chambers 1220a and 1230a through which the pressurized medium having hydraulic pressure is transferred, and a pipe having strength to withstand the hydraulic pressure is provided. Product durability and performance can be promoted. On the other hand, the third connection line 1630 is provided in connection with the main reservoir 1100a or the sub-reservoir 1100b having an internal pressure of the atmospheric pressure level, and the pressurized medium in which the hydraulic pressure is not formed is delivered. Therefore, it may be provided with a hose having elasticity to promote ease of installation according to the arrangement position of the first block 100 and the second block 200 . The first connection line 1610 and the second connection line 1620 may be installed on the vehicle body by a fastening member (not shown) having a predetermined restoring force so as to maintain connectivity despite an impact such as a vehicle accident.

Hereinafter, the operation of the electronic brake system 1000 according to the first embodiment of the present invention will be described.

Since the electronic brake system 1000 according to the first embodiment of the present invention includes a plurality of electronic control units 310 and 320, the first electronic control unit 310 and the second electronic control unit 320 during normal operation. can be controlled and operated by Specifically, the electronic brake system 1000 controls the first normal mode controlled by the first electronic control unit 310 and the second electronic control unit 320 when the first electronic control unit 310 abnormally operates. It can operate in a second normal mode.

At this time, when the electronic brake system 1000 according to the first embodiment of the present invention is switched from the first normal mode to the second normal mode, that is, when the first electronic control unit 310 operates abnormally, it recognizes it and 2 In a state before the electronic control unit 320 operates, it may operate in a transition state that is a temporary abnormal state.

In addition, the electronic brake system 1000 according to the first embodiment of the present invention may operate in the fallback mode when all of the plurality of electronic control units 300 operate abnormally.

That is, the electronic brake system 1000 according to the first embodiment of the present invention operates in the first normal mode to be controlled by the first electronic control unit 310 during normal operation, and the first electronic control unit 310 operates In the case of abnormal operation, the second electronic control unit 320 operates in a switched state until the operation, and the second electronic control unit 320 operates and sequentially operates to operate in the second normal mode.

2 is a hydraulic circuit diagram illustrating an operation in the first normal mode of the electronic brake system 1000 according to the first embodiment of the present invention.

Referring to FIG. 2 , in the first normal mode of the electronic brake system 1000 according to the first embodiment of the present invention, various devices and valves operate normally, and the various devices and valves are connected to the first electronic control unit 310 . can be controlled by

In the first normal mode, when the driver steps on the brake pedal 10 , the pedal sensor 11 detects the pedal effort and transmits an electrical signal to the first electronic control unit 310 . Accordingly, the first electronic control unit 310 transmits electrical signals to various devices and valves to generate hydraulic pressure to the hydraulic pressure supply device 1300 , and the hydraulic control unit 1400 and the first and second hydraulic circuits 1510 and 1520 ) through the wheel cylinders (21, 22, 23, 24) to provide a pressurized medium.

In the first normal mode, the first cut valve 1531 provided in the outlet flow path 1530 is switched to close so that the hydraulic pressure acting on the first hydraulic circuit 1510 does not leak, and the wheel cylinder is operated by the hydraulic pressure supply device 1300 . The second cut valve 1621 provided in the second connection line 1620 to implement braking at (21, 22, 23, 24) is switched to closing, and the pressurized medium discharged from the master cylinder 1200 is transferred to the wheel cylinder 20 ) is prevented from being transmitted to the side.

When a pedal force is applied to the brake pedal 10 , the first master piston 1220 advances and the pressurized medium accommodated in the first master chamber 1220a is transferred to the pedal simulator 1250 through the first connection line 1610 . Accordingly, the simulation spring 1252c is elastically deformed by the displacement of the simulation piston 1252a, and the elastic restoring force of the simulation spring 1252c is provided to the driver as a pedal feeling. At this time, the pressurized medium accommodated in the simulation chamber 1252b may be supplied to the sub-reservoir 1100b through the simulator discharge passage 1251 . In addition, the second master chamber 1230a is sealed as the second cut valve 1621 is closed, so that no displacement occurs in the second master piston 1230 .

3 is a hydraulic circuit diagram illustrating an operation in a switching state of the electronic brake system 1000 according to the first embodiment of the present invention.

Referring to FIG. 3 , the electronic brake system 1000 according to the first embodiment of the present invention has a redundancy function by including a plurality of electronic control units 300 as described above.

Specifically, it operates in the first normal mode controlled by the first electronic control unit 310 in normal times, and is controlled by the second electronic control unit 320 when the first electronic control unit 310 malfunctions or operates abnormally. It can operate in the second normal mode.

In this case, the first electronic control unit 310 may operate abnormally, and before the second electronic control unit 320 operates, it may operate in a temporarily abnormally operated switching state. This transition state may be about 10 ms to 100 ms, but the recognition time for which the driver feels the discomfort of the kickback is within 10 ms due to the temporary abnormal operation, so a reduction in kickback is required in the transition state.

In the switching state, various devices and valves are provided in an abnormal state, and as the operation of the hydraulic pressure supply device 1300 that provided hydraulic pressure is stopped, the pressurized medium acting on each wheel cylinder 21, 22, 23, 24 The hydraulic pressure may be released and leaks may occur.

Specifically, as the first cut valve 1531 of the outlet flow path 1530 is switched to an open state, the pressure applied to the third and fourth wheel cylinders 23 and 24 provided in the first hydraulic circuit 1510 is applied. The medium may be delivered to the sub-reservoir 1100b through the outlet flow path 1530 .

In addition, as the second cut valve 1621 of the second connection line 1620 is switched to an open state, the pressurizing medium acting on the first and second wheel cylinders 21 and 22 of the second hydraulic circuit 1520 may leak into the second master chamber 1230a through the second connection line 1620 . Accordingly, hydraulic pressure may be applied to the second master piston 1230 in a retracting direction to cause a minute kickback.

On the other hand, the pedal simulator 1250 is connected to the first master chamber 1220a through the first connection line 1610 and maintains a feeling of pedaling in the first master piston 1220 and the brake pedal 10 connected thereto, thereby performing kickback. can be significantly reduced.

That is, the electronic brake system 1000 according to the first embodiment of the present invention always connects the first master chamber 1220a and the pedal simulator 1250 in normal and abnormal operating states to determine whether the electronic control unit 300 is faulty. It has the advantage of maintaining the pedal feel regardless of the condition and reducing the kickback occurring in the transition state.

4 is a hydraulic circuit diagram illustrating an operation in the second normal mode of the electronic brake system 1000 according to the first embodiment of the present invention.

Referring to FIG. 4 , the electronic brake system 1000 according to the first embodiment of the present invention is a second normal mode controlled by the second electronic control unit 320 through the first normal mode and the transition state as described above. mode can be operated.

When the first electronic control unit 310 malfunctions or operates abnormally in the second normal mode, the second electronic control unit 320 controls various devices and valves to operate normally instead of the first electronic control unit 310 . can do.

Operations of various devices and valves in the second normal mode are the same as in the first normal mode, and thus are the same as those in the first normal mode, and thus descriptions will be omitted to avoid duplication.

5 is a hydraulic circuit diagram illustrating an operation in the fallback mode of the electronic brake system 1000 according to the first embodiment of the present invention.

Referring to FIG. 5 , in the electronic brake system 1000 according to the first embodiment of the present invention, in the fallback mode, various devices and valves are controlled to an initial braking state in which they are inactive. This fallback mode may be operated when all of the plurality of electronic control units 300 operate abnormally.

In the fallback mode, when the driver applies a pedal force to the brake pedal 10 , the first master piston 1220 connected to the brake pedal 10 advances and displacement occurs. At this time, the pressurized medium accommodated in the first master chamber 1220a by the advance of the first master piston 1220 may be transmitted to the pedal simulator 1250 through the first connection line 1610 to form a pedal feeling. In addition, the pressurized medium filled in the simulation chamber 1252b may be transferred to the sub-reservoir 1100b through the simulator discharge passage 1251 and the first sub-reservoir passage 1710 .

At the same time, the displacement of the first master piston 1220 or the hydraulic pressure of the first master chamber 1220a advances the second master piston 1230 to generate displacement, and the pressurized medium accommodated in the second master chamber 1230a is It is transmitted to the second hydraulic circuit 1520 and the first and second wheel cylinders 21 and 22 through the second connection line 1620 to implement braking.

Accordingly, in the electronic brake system 1000 according to the first embodiment of the present invention, even if the plurality of electronic control units 300 malfunction or operate abnormally, the hydraulic pressure transmitted from the master cylinder 1200 is transferred to the wheel cylinders 21 and 22 . can be transmitted, thus improving braking stability.

6 is a hydraulic circuit diagram showing the electromagnetic brake system 1000 according to a modified example of the first embodiment of the present invention.

Referring to FIG. 6 , in the electronic brake system 1000 of a modified example of the first embodiment of the present invention, a balance hydraulic flow path 1411 that hydraulically connects the first hydraulic circuit 1510 and the second hydraulic circuit 1520 to each other. And, it may further include a balance valve (1439).

The balance valve 1439 may be provided as a normal open type solenoid valve that is normally open and operates to close when an electrical signal is received from the electronic control unit 300 .

A modified example of the first embodiment of the present invention transmits some of the hydraulic pressure provided to the second hydraulic circuit 1520 to the first hydraulic circuit 1510 through the second connection line 1620 in the above-described fallback mode to provide four It is possible to uniformly provide hydraulic pressure to the wheel cylinders 21 , 22 , 23 , and 24 .

Hereinafter, the electronic brake system 2000 according to the second embodiment of the present invention will be described.

7 is a hydraulic circuit diagram showing an electromagnetic brake system 2000 according to a second embodiment of the present invention.

Referring to FIG. 7 , the electronic brake system 2000 according to the second embodiment of the present invention includes a first block 100 including a master cylinder 2200 , a pedal simulator 2250 , and a hydraulic pressure supply device 1300 . and a second block 200 including a hydraulic control unit 1400 and spaced apart from the first block 100 , a plurality of electronic control units 300 , one end connected to the first block 100 and the other end It may be provided to include a connection line 2600 connected to the second block 200 .

In the description of the electronic brake system 2000 according to the second embodiment of the present invention to be described below, the electromagnetic brake system 1000 according to the first embodiment of the present invention described above, except for cases where separate reference numerals are used to additionally describe it. ) and the description is omitted to prevent duplication of content.

The first block 100 is arranged with a mechanical unit that operates in connection with and interlocks with the brake pedal 10 , and the second block 200 operates electronically such as a valve and a sensor whose operation is controlled by an electronic control unit (ECU). and controlled electronics are disposed. The first block 100 and the second block 200 are disposed to be spaced apart from each other in the vehicle and may be hydraulically connected by a plurality of connection lines 2600, thereby improving the vehicle mountability of the electronic brake system 1000 and , and furthermore, by promoting the degree of freedom in the design of the vehicle, it is possible to efficiently arrange the space.

The mechanism unit includes component elements that perform an operation in conjunction with the brake pedal 10 irrespective of the control signal of the electronic control unit or operate by a separate operation, and may be disposed in the first block 100 .

The first block 100 includes a main reservoir 2100a in which a pressurized medium such as brake oil is stored, and a master cylinder 2200 that pressurizes and discharges pressurized media such as brake oil accommodated inside according to the pedaling force of the brake pedal 10 . , a main reservoir flow path 2110 connecting the main reservoir 2100a and the master cylinder 2200 may be included.

The master cylinder 2200 is configured to include a hydraulic chamber, and can pressurize and discharge the pressurizing medium inside. The master cylinder 2200 may include a master chamber 2220a and a master piston 2220 provided in the master chamber 2220a. The master chamber 2220a may be formed on the inlet side of the cylinder block 2210 to which the brake pedal 10 is connected, and the master piston 2220 may be accommodated in the master chamber 2220a to be reciprocally moved.

In the master chamber 2220a, the pressurized medium may be introduced and discharged through the first hydraulic port 2280a and the second hydraulic port 2280b. The first hydraulic port 2280a is connected to a main reservoir flow path 2110 to be described later so that the pressurized medium flows from the main reservoir 2100a to the master chamber 2220a, and the first hydraulic port 2280a has one front and one rear side. A pair of sealing members may be provided to seal the master chamber 2220a. The second hydraulic port 2280b is connected to a first connection line 2610 to be described later so that the pressurized medium of the master chamber 2220a is discharged to the first connection line 2610 or, conversely, from the first connection line 2610 to the master A pressurized medium may be introduced into the chamber 2220a.

The master piston 2220 is provided to be accommodated in the master chamber 2220a, pressurizing the pressurizing medium accommodated in the master chamber 2220a by moving forward, or by moving backward, it is possible to form a negative pressure inside the master chamber 2220a. Specifically, when the master piston 2220 moves forward, as the volume of the master chamber 2220a decreases, the pressurizing medium present in the master chamber 2220a may be pressurized to form hydraulic pressure. Conversely, as the volume of the master chamber 2220a increases when the master piston 2220 moves backward, the pressurized medium present in the master chamber 2220a may be decompressed, and at the same time, a negative pressure is applied to the master chamber 2220a. can be formed

The piston spring 2220b is provided to elastically support the master piston 2220 . To this end, the piston spring 2220b may be disposed between the front surface of the master piston 2220 and the inner surface of the cylinder block 2210 . When displacement occurs in the master piston 2220 according to an operation such as braking, the piston spring 2220b is compressed, and then, when the operation such as braking is released, the piston spring 2220b expands by elastic force and the master piston 2220 ) can each return to the original position.

The main reservoir 2100a may accommodate and store the pressurized medium therein. The main reservoir 2100a may be connected to component elements such as the master cylinder 2200 and a second connection line 2620 to be described later to supply or receive a pressurized medium.

The main reservoir 2100a may be provided by being partitioned into a plurality of chambers by a partition wall 2105a. The main reservoir 2100a may include a plurality of main reservoir chambers 2101a and 2102a, and the plurality of main reservoir chambers 2101a and 2102a may be arranged in parallel with the bulkhead 2105a as a center. Specifically, the main reservoir 2100a may be divided into a first main reservoir chamber 2101a disposed on one side and a second main reservoir chamber 2102a disposed on the other side.

The partition wall 2105a may be provided between adjacent main reservoir chambers 2101a and 2102a, and each partition wall 2105a may be provided with at least a portion of an upper end thereof open. As a result, the adjacent main reservoir chambers 2101a and 2102a communicate with each other so that the pressurized medium can move. For example, when a large amount of pressurized medium flows into the first main reservoir chamber 2101a, the pressurized medium may be delivered to the second main reservoir chamber 2102a through the upper end of the partition wall 2105a.

The first main reservoir chamber 2101a may be connected to the main reservoir flow path 2110 to supply or receive a pressurized medium toward the master cylinder 2200 . In addition, the second main reservoir chamber 2102a is connected to a second connection line 2620 to be described later to supply the pressurized medium to the sub-reservoir 2100b or to receive the pressurized medium from the sub-reservoir 2100b.

As described above, since the main reservoir 2100a is divided into the first and second main reservoir chambers 2101a and 2102a, stable operation of the electronic brake system 2000 can be promoted. For example, if the main reservoir 2100a is formed as a single chamber and the capacity of the pressurized medium is not sufficient, it is impossible to stably supply the pressurized medium to the master cylinder 2200 as well as the sub-reservoir 2100b. Accordingly, the main reservoir 2100a includes a second main reservoir chamber 2102a connected to the sub-reservoir 2100b of the second block 200 and a first main reservoir chamber 2101a connected to the master cylinder 2200 side. By providing separately, even when the pressurized medium cannot be supplied to any one component element, braking of the vehicle can be implemented by supplying the pressurized medium to another component element.

The main reservoir flow path 2110 is provided to hydraulically connect the master cylinder 2200 and the main reservoir 2100a. The main reservoir flow path 2110 connects the master chamber 2220a and the first main reservoir chamber 2101a of the main reservoir 2100a. To this end, one end of the main reservoir flow path 2110 may communicate with the master chamber 2220a of the master cylinder 2200 , and the other end may communicate with the first main reservoir chamber 2101a of the main reservoir 2100a.

The pedal folding device 2260 may move the brake pedal 10 so that the driver's living comfort and operability of the vehicle may be improved according to the operating situation of the vehicle. Specifically, when the vehicle autonomously drives, braking of the vehicle is automatically implemented, so that the driver's operation of the brake pedal 10 is unnecessary. Therefore, the electronic brake system 2000 according to the present embodiment advances the brake pedal 10 by the pedal folding device 2260 to provide a comfortable habitability to the driver to remove the brake pedal 10 from the passenger space of the vehicle. can be stored. On the contrary, when the vehicle is operated and braked by the driver, the brake pedal 10 is reversed so that the driver can easily operate the brake pedal 10 to move the brake pedal 10 to the passenger space of the vehicle in which the driver is riding. can be exposed as In addition, the position at which the brake pedal 10 is easily manipulated may vary depending on the driver's body size, and the driver may require living comfort even when the vehicle is stopped. ) can be adjusted to a suitable position.

The pedal folding device 2260 is disposed on the first block 100 , and may be provided between the master piston 2220 and the input rod of the brake pedal 10 . The pedal folding device 2260 includes an actuator 2261 that generates and provides power for movement of the brake pedal 10 or the input rod, and a gear unit that converts the rotational power of the actuator 2261 into linear motion of the input rod ( 2262) may be included. The actuator 2261 may include a driving motor that receives power from a vehicle battery (not shown) to generate power, and the gear unit 2262 receives the rotational force of the driving motor to receive the input rod and brake pedal 10 . ) can cause forward and backward movements. The gear unit 2262 may be provided in various gear structures for converting rotational motion into linear motion, for example, a first screw thread formed on the outer circumferential surface of the input rod, and a first screw thread formed on the drive shaft of the drive motor and meshed with the first screw thread A second thread may be provided, but is not limited thereto.

The electronic unit includes component elements that are electronically operated and controlled by control signals of a plurality of electronic control units (ECUs), and may be disposed in the second block 200 .

The second block 200 includes a sub-reservoir 2100b that auxiliaryly stores a pressurized medium therein, a pedal simulator 2250 that provides a reaction force to the driver's pedal effort with the brake pedal 10 , and a displacement of the brake pedal 10 . The hydraulic pressure supplied from the hydraulic pressure supply device 2300 and the hydraulic pressure supply device 2300 for generating hydraulic pressure of the pressurized medium through mechanical operation by receiving the driver's braking intention as an electrical signal by the pedal displacement sensor 11 that detects and the first to fourth wheel cylinders 21, 22, 23 and 24, hydraulically connecting the hydraulic control unit 2400, the sub-reservoir 2100b, and the hydraulic pressure supply device 2300 for controlling the hydraulic pressure delivered to the cylinders 21, 22, 23, 24, but these A plurality of sub-reservoir flow paths 2710 and 2720 connecting the dump control unit 2800 for controlling the flow of the pressurized medium therebetween and the sub-reservoir 2100b to the first and second hydraulic circuits 2510 and 2520 and the dump control unit 2800 side. , 2730, 2740), a plurality of cut valves 411 and 412a provided in the connection line to control the flow of the pressurized medium, and a circuit pressure sensor for detecting the hydraulic pressure of the pressurized medium provided by the hydraulic pressure supply device 2300 (PS1) may include

The electronic control unit 300 may receive electrical signals detected by various sensors, transmit electrical signals to various devices and components such as valves, and determine whether there is an abnormality.

A plurality of electronic control units 300 may be provided to have a redundancy function. Specifically, the electronic control unit 300 may include a first electronic control unit 310 and a second electronic control unit 320 , and the first electronic control unit 310 normally controls various devices and valves. and the second electronic control unit 320 may operate to control various devices and valves on behalf of the first electronic control unit 310 when the first electronic control unit 310 operates abnormally. That is, when the first electronic control unit 310 operates abnormally, the sensor recognizes whether there is an abnormality, blocks the signal of the first electronic control unit 310, and the second electronic control unit 320 controls various devices and valves. can act to control.

The pedal simulator 2250 is provided to provide a reaction force to the driver's pedal effort for operating the brake pedal 10 .

The pedal simulator 2250 has a front end connected to a first connection line 2610 to be described later, and a rear end connected to the sub-reservoir 1100b through a simulator discharge passage 2251 .

The pedal simulator 2250 includes a simulation piston 2252a provided to be displaceable by a pressurized medium introduced through the first connection line 2610, and the volume is changed by displacement of the simulation piston 2252a, and the simulator discharges at the rear end. It includes a simulation chamber 2252b communicating with the flow path 2251 and a simulation spring 2252c elastically supporting the simulation piston 2252a.

The simulation piston 2252a is provided to be displaceable in the simulation chamber 2252b by the pressurized medium introduced through the first connection line 2610 . Specifically, the hydraulic pressure of the pressurized medium flowing in through the first connection line 2610 is transmitted to the front surface of the simulation piston 2252a to cause displacement in the simulation piston 2252a, and to the displacement of the simulation piston 2252a. As the volume of the simulation chamber 2252b formed on the rear surface of the simulation piston 2252a decreases by the have. The simulation spring 2252c is compressed according to the displacement of the simulation piston 2252a by elastically supporting the simulation piston 2252a, and an elastic restoring force therefor may be provided to the driver as a pedal feeling.

Meanwhile, in the drawings, as an example, the simulation spring 2252c is illustrated as a coil spring, but in addition to providing an elastic force to the simulation piston 2252a and providing an elastic restoring force, various structures may be formed. For example, it may be made of a material such as rubber, or may be made of various members capable of storing elastic force such as a leaf spring.

The simulator discharge flow path 2251 may be connected to the rear end of the pedal simulator 2250 so that one end communicates with the simulation chamber 2252b and the other end joins a first sub-reservoir flow path 2710 to be described later. By connecting the simulation chamber 2252b and the sub-reservoir 1100b through this, the pressurized medium discharged from the simulation chamber 2252b is supplied to the sub-reservoir 1100b, or conversely, from the sub-reservoir 1100b to the simulation chamber 2252b. A pressurized medium may be supplied.

The operation of the pedal simulator 2250 will be described. When the driver operates the brake pedal 10 to apply a pedaling force, the master piston 2220 advances and the pressurized medium in the master chamber 2220a connects the first connection line 2610. It is supplied and pressed to the front surface of the simulation piston 2252a through the Accordingly, as displacement occurs in the simulation piston 2252a, the simulation spring 2252c is compressed, and the elastic restoring force of the simulation spring 2252c may be provided to the driver as a pedal feeling. At this time, the pressurized medium filled in the simulation chamber 2252b is transferred to the sub-reservoir 1100b through the simulator discharge passage 2251 and the first sub-reservoir passage 2710 . Afterwards, when the driver releases the pedaling force of the brake pedal 10, the simulation spring 2252c expands by the elastic restoring force, the simulation piston 2252a returns to its original position, and the pressurizing medium that presses the front surface of the simulation piston 2252a returns to the master chamber 2220a through the first connection line 2610 . A pressurized medium is supplied to the simulation chamber 2252b sequentially from the sub-reservoir 1100b through the first sub-reservoir passage 2710 and the simulator discharge passage 2251, so that the inside of the simulation chamber 2252b is filled with the pressurized medium again. can

As such, since the inside of the simulation chamber 2252b is always filled with a pressurized medium, friction of the simulation piston 2252a is minimized when the pedal simulator 2250 is operated, so that the durability of the pedal simulator 2250 is improved as well as the external The inflow of foreign substances may be blocked.

The sub-reservoir flow path is provided to hydraulically connect the first hydraulic circuit 1510 , the second hydraulic circuit 1520 , and the hydraulic pressure supply device 1300 to the sub-reservoir 1100b. The sub-reservoir flow path includes a first sub-reservoir flow path 2710 connecting the sub-reservoir 1100b and the rear end of the first hydraulic circuit 1510, and a sub-reservoir 2100b connecting the rear end of the second hydraulic circuit 2520. A second sub-reservoir flow path 2720, a third sub-reservoir flow path 1730 connecting the sub-reservoir 2100b and the first dump control unit, and a fourth sub-reservoir connecting the sub-reservoir 2100b and the second dump control unit A flow path 1740 may be included.

The second sub-reservoir flow path 2720 has one end connected to the second sub-reservoir chamber 2102b of the sub-reservoir 1100b, and the other end of the first and second outlet valves 2522a and 2522b of the second hydraulic circuit 2520 . ) can be connected to the downstream side of In addition, the first sub-reservoir flow path 2710 has one end connected to the second sub-reservoir chamber 2102b of the sub-reservoir 1100b, and the other end of the third and fourth outlet valves 2512a of the first hydraulic circuit 2510, 2512b), but the simulator discharge passage 2251 may join at the middle part. In addition, the third sub-reservoir flow path 2730 has one end connected to the third sub-reservoir chamber 2103b of the sub-reservoir 2100b, the other end connected to the first dump controller side, and a fourth sub-reservoir flow path 2740 . may have one end connected to the first sub-reservoir chamber 2101b of the sub-reservoir 2100b and the other end connected to the second dump controller side.

The second block 200 includes a first circuit pressure sensor PS11 for detecting the hydraulic pressure of the pressurized medium transferred from the hydraulic pressure supply device 1300 to the second hydraulic circuit 1520, and a first from the hydraulic pressure supply device 1300. A second circuit pressure sensor PS12 for sensing the hydraulic pressure of the pressurized medium transferred to the hydraulic circuit 1510 may be included. The first outlet flow path 2530 may be provided to connect the first hydraulic circuit 1510 and the first sub-reservoir flow path 2710 to control the discharge of the pressurized medium from the third and fourth wheel cylinders 23 and 24. have. A first cut valve 2531 for controlling discharge of the pressurized medium may be provided in the first outlet flow path 2530 . The first cut valve 2531 may be provided as a normally open type solenoid valve that is normally open and operates to close the valve when receiving an electrical signal from the electronic control unit 300 .

The second outlet flow path 2540 may be provided to connect the second hydraulic circuit 1520 and the sub-reservoir 1100b to control discharge of the pressurized medium from the first and first wheel cylinders 21 and 22 . A second cut valve 2541 for controlling the discharge of the pressurized medium may be provided in the second outlet flow path 2540 . The second cut valve 2541 may be provided as a normally open type solenoid valve that is normally open and operates to close the valve when receiving an electrical signal from the electronic control unit 300 .

The connection line 2600 is provided to hydraulically connect the first block 100 and the second block 200 spaced apart from each other.

The connection line 2600 includes a first connection line 2610 connecting the master cylinder 2200 of the first block 100 to the pedal simulator 2250 side, and the main reservoir 2100a of the first block 100 and A second connection line 2630 connecting the sub-reservoir 1100b of the second block 200 to each other may be included.

The first connection line 2610 may have one end connected to the master chamber 2220a of the master cylinder 2200 and connected to the front end of the pedal simulator 2250 .

The second connection line 2630 may be provided with one end communicating with the main reservoir 2100a and the other end communicating with the sub-reservoir 1100b. The second connection line 2630 allows the transfer of the pressurized medium between the reservoirs when the pressurized medium is excessively large or small in the reservoir on one side, thereby promoting smooth supply of the pressurized medium to each component element.

The first connection line 2610 may be provided as a pipe having a predetermined strength, and the second connection line 2630 may be provided as a hose having elasticity. The second connection line 2630 is provided with a pipe having the strength to withstand the hydraulic pressure as the pressurized medium in which the hydraulic pressure is formed is transmitted from the master chamber 2220a to improve durability and performance of the product. On the other hand, the second connection line 2630 is provided in connection with the main reservoir 2100a or the sub-reservoir 2100b having an internal pressure of the atmospheric pressure level, and the pressurized medium in which the hydraulic pressure is not formed is delivered. Therefore, it may be provided with a hose having elasticity to promote ease of installation according to the arrangement position of the first block 100 and the second block 200 . The first connection line 2610 and the second connection line 2630 may be installed on the vehicle body by a fastening member (not shown) having a predetermined restoring force so as to maintain connectivity despite an impact such as a vehicle accident.

Hereinafter, the operation of the electronic brake system 2000 according to the second embodiment of the present invention will be described.

Since the electronic brake system 2000 according to the second embodiment of the present invention includes a plurality of electronic control units 310 and 320, the first electronic control unit 310 and the second electronic control unit 320 during normal operation. can be controlled and operated by Specifically, the electronic brake system 2000 is controlled by the first electronic control unit 320 in the first normal mode controlled by the first electronic control unit 310 and the second electronic control unit 320 when the first electronic control unit 310 operates abnormally. It can operate in a second normal mode.

At this time, when the electronic brake system 2000 according to the second embodiment of the present invention is switched from the first normal mode to the second normal mode, that is, when the first electronic control unit 310 operates abnormally, it recognizes it and 2 In a state before the electronic control unit 320 operates, it may operate in a transition state that is a temporary abnormal state.

That is, the electronic brake system 2000 according to the second embodiment of the present invention operates in the first normal mode to be controlled by the first electronic control unit 310 during normal operation, and the first electronic control unit 310 operates In the case of abnormal operation, the second electronic control unit 320 operates in a switched state until the operation, and the second electronic control unit 320 operates and sequentially operates to operate in the second normal mode.

8 is a hydraulic circuit diagram illustrating an operation in the first normal mode of the electronic brake system 2000 according to the second embodiment of the present invention.

Referring to FIG. 8 , in the first normal mode of the electronic brake system 2000 according to the second embodiment of the present invention, various devices and valves operate normally, and the various devices and valves are connected to the first electronic control unit 310 . can be controlled by

In the first normal mode, when the driver steps on the brake pedal 10 , the pedal sensor 11 detects the pedal effort and transmits an electrical signal to the first electronic control unit 310 . Accordingly, the first electronic control unit 310 transmits an electrical signal to generate hydraulic pressure to the hydraulic pressure supply device 1300 , and the wheel cylinder through the hydraulic control unit 1400 and the first and second hydraulic circuits 1510 and 1520 . (21, 22, 23, 24) to provide a pressurized medium.

In the first normal mode, the first cut valve 2531 and the second cut valve 2541 provided in the first outlet flow path 2530 and the second outlet flow path 2540, respectively, are switched to be closed and the first hydraulic circuit 1510. And the hydraulic pressure acting on the second hydraulic circuit 1520 does not leak, and the hydraulic pressure supply device 1300 can implement braking to the wheel cylinders 21 , 22 , 23 , and 24 .

When a pedal force is applied to the brake pedal 10 , the master piston 2220 advances and the pressurized medium accommodated in the master chamber 2220a is transferred to the pedal simulator 2250 through the first connection line 2610 . Accordingly, the simulation spring 2252c is elastically deformed by the displacement of the simulation piston 2252a, and the elastic restoring force of the simulation spring 2252c is provided to the driver as a pedal feeling. At this time, the pressurized medium accommodated in the simulation chamber 2252b may be supplied to the sub-reservoir 1100b through the simulator discharge passage 2251 .

9 is a hydraulic circuit diagram illustrating an operation in a switching state of the electronic brake system 2000 according to the second embodiment of the present invention.

Referring to FIG. 9 , the electronic brake system 2000 according to the second embodiment of the present invention has a redundancy function by including a plurality of electronic control units 300 as described above.

Specifically, it operates in the first normal mode controlled by the first electronic control unit 310 in normal times, and is controlled by the second electronic control unit 320 when the first electronic control unit 310 malfunctions or operates abnormally. It can operate in the second normal mode.

In this case, the first electronic control unit 310 may operate abnormally, and before the second electronic control unit 320 operates, it may operate in a temporarily abnormally operated switching state. This transition state may be about 10 ms to 100 ms, but the recognition time for which the driver feels the discomfort of the kickback is within 10 ms due to the temporary abnormal operation, so a reduction in kickback is required in the transition state.

In the switching state, various devices and valves are provided in an abnormal state, and as the operation of the hydraulic pressure supply device 1300 that provided hydraulic pressure is stopped, the pressure medium acting on each wheel cylinder 21, 22, 23, 24 The hydraulic pressure may be released and leaks may occur.

Specifically, as the first cut valve 2531 of the first outlet flow path 2530 is switched to the open state, it acts on the third and fourth wheel cylinders 23 and 24 provided in the first hydraulic circuit 1510 . The pressurized medium may be delivered to the sub-reservoir 1100b through the first outlet flow path 2530 .

In addition, as the second cut valve 2541 of the second outlet flow path 2540 is switched to an open state, it acts on the first and second wheel cylinders 21 and 22 provided in the second hydraulic circuit 1520 . The pressurized medium may leak into the sub-reservoir 1100b through the second outlet flow path 2540 . Accordingly, since the pressurized medium leaking from the plurality of wheel cylinders 21 , 22 , 23 , and 24 is not transferred to the master cylinder 2200 , kickback does not occur.

On the other hand, the pedal simulator 2250 is connected to the master chamber 2220a through the first connection line 2610 and maintains the pedal feel to the master piston 2220 and the brake pedal 10 connected thereto, thereby reducing kickback. .

That is, the electronic brake system 1000 according to the second embodiment of the present invention always connects the master chamber 2220a and the pedal simulator 2250 in normal and abnormal operating states, so that the failure of the electronic control unit 300 is related. It has the advantage of maintaining the pedal feel without the need to, and reducing kickback occurring in the transition state.

10 is a hydraulic circuit diagram illustrating an operation in the second normal mode of the electronic brake system 2000 according to the second embodiment of the present invention.

Referring to FIG. 10 , the electronic brake system 2000 according to the second embodiment of the present invention is a second normal mode controlled by the second electronic control unit 320 through the first normal mode and the transition state as described above. mode can be operated.

When the first electronic control unit 310 malfunctions or operates abnormally in the second normal mode, the second electronic control unit 320 controls various devices and valves to operate normally instead of the first electronic control unit 310 can do.

Operations of various devices and valves in the second normal mode are the same as in the first normal mode, and thus are the same as those in the first normal mode, and thus descriptions will be omitted to avoid duplication.

As described above, the electronic brake systems 1000 and 2000 of the first and second embodiments of the present invention include a plurality of electronic control units 300, so that even if any one electronic control unit malfunctions or operates abnormally, other electronic brake systems 1000 and 2000 are provided. Safety can be improved by allowing the control unit to act on its behalf.

In addition, the electronic brake systems 1000 and 2000 according to the first and second embodiments of the present invention maintain pedal feel and reduce kickback even when any one electronic control unit malfunctions or operates abnormally and is switched to another electronic control unit. Driver discomfort can be reduced.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1000,2000: Electronic brake system
100: first block 200: second block
300: electronic control unit 310: first electronic control unit
320: second electronic control unit 1100a: main reservoir
1100b: sub-reservoir 1200: master cylinder
1250: pedal simulator 1300: hydraulic supply
1400: hydraulic control unit 1510: first hydraulic circuit
1520: second hydraulic circuit 1600: connection line

Claims (17)

a first block including a master cylinder having a first master piston connected to a brake pedal and a first master chamber whose volume is changed by displacement of the first master piston;
A pedal simulator, a hydraulic pressure supply device that generates hydraulic pressure by operating a hydraulic piston by an electrical signal, and a first hydraulic circuit that controls the hydraulic pressure delivered to the two wheel cylinders and the other two wheel cylinders. a second block including a hydraulic control unit having a second hydraulic circuit and spaced apart from the first block;
a plurality of electronic control units for controlling various devices and valves based on hydraulic pressure information and displacement information of the brake pedal; and
a connection line having one end connected to the first block and the other end connected to the second block; and
The connecting line is
An electronic brake system having one end connected to the first master chamber and the other end connected to the pedal simulator side. According to claim 1,
The master cylinder is
A second master piston provided to be displaceable by the hydraulic pressure of the first master chamber, and a second master chamber whose volume is changed by displacement of the second master piston,
The connecting line is
The electronic brake system further comprising a second connection line having one end connected to the second master chamber and the other end connected to the second hydraulic circuit side. 3. The method of claim 2,
The first block further comprises a main reservoir in which the pressurized medium is stored,
The second block further includes a sub-reservoir in which the pressurized medium is stored,
The connecting line is
The electronic brake system further comprising a third connection line having one end connected to the main reservoir and the other end connected to the sub-reservoir. 4. The method of claim 3,
The second block is
an outlet passage connecting the first hydraulic circuit and the sub-reservoir;
a first cut valve provided in the outlet passage to control the flow of the pressurized medium;
The electronic brake system further comprising a second cut valve provided on the second connection line to control the flow of the pressurized medium. 5. The method of claim 4,
The second block is
The electronic brake system further comprising: a first sub-reservoir passage connecting the sub-reservoir and a rear end of the first hydraulic circuit; and a second sub-reservoir passage connecting the sub-reservoir and a rear end of the second hydraulic circuit. 6. The method of claim 5,
The second block is
Further comprising a simulator discharge flow path connected to the rear end of the pedal simulator,
The simulator discharge flow path joins the first sub-reservoir flow path and is connected to the sub-reservoir. 3. The method of claim 2,
The hydraulic control unit
The electromagnetic brake system further comprising: a balance flow path connecting the first hydraulic circuit and the second hydraulic circuit; and a balance valve provided in the balance flow path to control a flow of a pressurized medium. According to claim 1,
The first block is
The electronic brake system further comprising a pedal folding device provided between the first master piston and the brake pedal. 9. The method of claim 8,
The first block further comprises a main reservoir in which the pressurized medium is stored,
The second block further includes a sub-reservoir in which the pressurized medium is stored,
The connecting line is
The electronic brake system further comprising a second connection line having one end connected to the main reservoir and the other end connected to the sub-reservoir. 10. The method of claim 9,
The second block is
The electronic brake system further comprising: a first sub-reservoir passage connecting the sub-reservoir and a rear end of the first hydraulic circuit; and a second sub-reservoir passage connecting the sub-reservoir and a rear end of the second hydraulic circuit. 11. The method of claim 10,
The second block is
a first outlet flow path connecting the first hydraulic circuit and the first sub-reservoir flow path;
a second outlet passage connecting the second hydraulic circuit and the sub-reservoir;
a first cut valve provided in the first outlet flow path to control the flow of the pressurized medium;
The electronic brake system further comprising a second cut valve provided in the second outlet flow path to control the flow of the pressurized medium. 11. The method of claim 10,
The second block is
Further comprising a simulator discharge flow path connected to the rear end of the pedal simulator,
The simulator discharge flow path joins the first sub-reservoir flow path and is connected to the sub-reservoir. 9. The method of claim 8,
The pedal folding device
An electronic brake system comprising: an actuator for generating and providing power; and a gear unit provided between an input rod connected to the brake pedal and the actuator to convert the rotational force of the actuator into linear motion of the input rod. 11. The method of claim 5 or 10,
The hydraulic supply device is
An electromagnetic brake system comprising a first pressure chamber provided in front of the hydraulic piston and a second pressure chamber provided in the rear of the hydraulic piston. 15. The method of claim 14,
The second block is
Further comprising a dump control unit provided between the sub-reservoir and the hydraulic pressure supply device to control the flow of the pressurized medium,
The dump control unit
Electronic brake system comprising: a first dump control unit for controlling the flow of pressurized medium between the first pressure chamber and the sub-reservoir; and a second dump control unit for controlling the flow of pressurized medium between the second pressure chamber and the sub-reservoir; . 16. The method of claim 15,
The second block is
The electronic brake system further comprising: a third sub-reservoir passage connecting the sub-reservoir and the first dump control unit; and a fourth sub-reservoir passage connecting the sub-reservoir and the second dump control unit. According to claim 1,
The plurality of electronic control units
An electronic brake system comprising: a first electronic control unit that controls various devices and valves; and a second electronic control unit that operates when the first electronic control unit operates abnormally.

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