Patent ID: 12187247

MODES OF THE INVENTION

Hereinafter, the embodiments of the disclosure will be described in detail with reference to accompanying drawings. It should be understood that the terms used in the specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the disclosure on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Therefore, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the disclosure, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the disclosure.

FIG.1is a hydraulic circuit diagram showing an electronic brake system1000according to an embodiment of the disclosure.

Referring toFIG.1, the electronic brake system1000according to an embodiment may include a first block1100in which a mechanically operated mechanical unit is disposed, a second block1200in which an electronically operated and controlled electrical unit is disposed, and a connection line1300hydraulically connecting the first block1100and the second block1200.

The first block1100includes the mechanical unit connected and interworked with a brake pedal10to provide a mechanical operation, and the second block1200includes the electrical unit electronically operated and controlled, such as various solenoid valves whose operation is controlled by an electronic control unit (ECU). The first block1100and the second block1200are spaced apart from each other in a vehicle and may be hydraulically connected by a plurality of connection lines1300, thereby improving a vehicle installation of the electronic brake system1000, and further, by promoting a degree of freedom in design of the vehicle, efficient space arrangement may be possible.

The mechanical unit includes components that perform a mechanical operation in conjunction with the brake pedal10irrespective of a control signal of the ECU.

The mechanical unit may include a main reservoir1120in which a pressurized medium such as a brake oil is stored, an integrated master cylinder1110that provides a reaction force according to a pedaling force of the brake pedal10to a driver and pressurizes and discharges the pressurized medium accommodated therein, and reservoir flow paths1131,1132, and1133connecting the main reservoir1120and the integrated master cylinder1110.

The integrated master cylinder1110includes a simulation chamber1112aand master chambers1113aand1114a, when the driver applies a pedal force to the brake pedal10for braking operation, to provide a pedal feeling and at the same time, pressurize and discharge the pressurized medium accommodated therein.

FIG.2is an enlarged cross-sectional view of the first block1100of the electronic brake system1000according to the embodiment. Referring toFIG.2, the integrated master cylinder1110may be divided into a pedal simulation unit that provides a pedal feeling to the driver, and a master cylinder unit that supplies and receives the pressurized medium to a main reservoir1120and the electrical unit to be described later. In the integrated master cylinder1110, the pedal simulation unit and the master cylinder unit are sequentially provided from the brake pedal10side, and may be coaxially arranged within one cylinder block1111.

In particular, the integrated master cylinder1110includes a cylinder block1111forming a chamber inside, a simulation chamber1112aformed on an inlet side of the cylinder block1111to which the brake pedal10is connected, a simulation piston1112provided in the simulation chamber1112aand connected to the brake pedal10so as to be displaceable according to the operation of the brake pedal10, a first master chamber1113a, a first master piston1113provided in the simulation chamber1112aand provided to be displaceable by a displacement of the simulation piston1112, a second master chamber1114a, a second master piston1114provided in the second master chamber1114aand provided to be displaceable by hydraulic pressure generated in the first master chamber1113aaccording to a displacement of the first master piston1113, an elastic member1116provided between the simulation piston1112and the first master piston1113and providing the pedal feeling through an elastic restoring force generated during compression, a simulator spring1112bthat elastically supports the simulation piston1112, a first piston spring1113bthat elastically supports the first master piston1113, and a second piston spring1114bthat elastically supports the second master piston1114.

The simulation chamber1112a, the first master chamber1113a, and the second master chamber1114amay be sequentially formed inward (left side with reference toFIGS.1and2) from the brake pedal10side (right side with reference toFIGS.1and2) on the cylinder block1111of the integrated master cylinder1110. Furthermore, the simulation piston1112, the first master piston1113, and the second master piston1114are respectively disposed in the simulation chamber1112a, the first master chamber1113a, and the second master chamber1114ato move forward and backward, so that the pressurized medium accommodated in each chamber may be pressurized or formed a negative pressure.

The simulation chamber1112amay be formed on an inlet side or the outermost side (right side with reference toFIGS.1and2) of the cylinder block1111, and the simulation chamber1112ais connected to an input rod of the brake pedal10the simulation piston1112may be reciprocally accommodated in the simulation chamber1112aconnected to an input rod of the brake pedal10.

In the simulation chamber1112a, the pressurized medium may be introduced and discharged through a first hydraulic port1111aand a second hydraulic port1111b. The first hydraulic port1111ais connected to the first reservoir flow path1131to be described later to introduce the pressurized medium from the main reservoir1120to the simulation chamber1112a. A first sealing member1115aand a second sealing member1115bare respectively provided on a front side (left side with reference toFIG.2) and a rear side (right side with respect toFIGS.1and2) of the first hydraulic port1111a. Among the sealing members, the first sealing member1115aallows only the supply of the pressurized medium from the first reservoir flow path1131to the simulation chamber1112aand blocks a flow of the pressurized medium in the opposite direction, thereby preventing the pressurized medium of the simulation chamber1112afrom leaking into the first reservoir flow path1131through the first hydraulic port1111a. The second hydraulic port1111bis connected to a first connection line1310to be described later to allow the pressurized medium of the simulation chamber1112ato discharge to the first connection line1310, or conversely, introduce the pressurized medium from the first connection line1310into the chamber1112a.

The simulation piston1112is provided to be accommodated in the simulation chamber1112a, pressurizing the pressurized medium accommodated in the simulation chamber1112aby moving forward (left direction with reference toFIGS.1and2), or creating a negative pressure in the simulation chamber1112aby moving backward.

The simulation piston1112may include a piston body1112cin which a cut-off hole (not shown) communicating the first hydraulic port1111aand the simulation chamber1112ais formed, and a spring support1112dthat is formed to be expanded outwardly at end portion connected to the brake pedal10. The piston body1112cmay pressurize the pressurized medium of the simulation chamber1112aor generate a negative pressure by contacting an outer circumferential surface of the piston body1112cwith an inner circumferential surface of the simulation chamber1112a. The spring support1112dis disposed on an outside the cylinder block1111and has an expanded radius, and may be integrally formed with the piston body1112c.

A simulator spring1112bfor elastically supporting the simulation piston1112is provided to be supported on the spring support1112d. In particular, the simulator spring1112bhas one side supported on the cylinder block1111and the other side supported on one side of the spring support1112d, and the input rod is supported on the other side of the spring support1112d, so that the simulation piston1112may be operated in conjunction with the brake pedal10. As the brake pedal10operates, a displacement of the simulation piston1112occurs. At this time, the simulator spring1112bis compressed, and then, when the pedal force of the brake pedal10is released, the simulation piston1112may return to its original position while the simulator spring1112bexpands by the elastic force.

The first master chamber1113amay be formed inside (left side with reference toFIGS.1and2) of the simulation chamber1112aon the cylinder block1111, and the first master piston1113amay be reciprocally accommodated in the first master chamber1113a.

In the first master chamber1113a, the pressurized medium may be introduced and discharged through a third hydraulic port1111cand a fourth hydraulic port1111d. The third hydraulic port1111cis connected to a second reservoir flow path1132to be described later to introduce the pressurized medium from the reservoir1120to the first master chamber1113a. A third sealing member1115cand a fourth sealing member1115dare respectively provided on a front side (left side with reference toFIGS.1and2) and a rear side (right side with reference toFIGS.1and2) of the third hydraulic port1111c. Among the sealing members, the third sealing member1115callows only the supply of the pressurized medium from the second reservoir flow path1132to the first master chamber1113aand blocks a flow of the pressurized medium in the opposite direction, thereby preventing the pressurized medium of the first master chamber1113afrom leaking into the second reservoir flow path1132through the third hydraulic port1111c. The fourth hydraulic port1111dis connected to a second connection line1320to be described later to allow the pressurized medium of the first master chamber1113ato discharge to the second connection line1320, or conversely, introduce the pressurized medium from the second connection line1320into the first master chamber1113a.

The first master piston1113is provided to be accommodated in the first master chamber1113a, pressurizing the pressurized medium accommodated in the first master chamber1113aby moving forward, or creating a negative pressure in the first master chamber1113aby moving backward. In particular, when the first master piston1113moves forward, as a volume of the first master chamber1113adecreases, the pressurized medium present in the first master chamber1113amay be pressurized to form a hydraulic pressure. On the contrary, as the volume of the first master chamber1113aincreases when the first master piston1113moves backward, the pressurized medium present in the first master chamber1113amay be decompressed, and at the same time, a negative pressure may be formed in the first master chamber1113a.

The second master chamber1114amay be formed inside (left side with reference toFIGS.1and2) of the first master chamber1113aon the cylinder block1111, and the second master piston1114amay be reciprocally accommodated in the second master chamber1114a.

In the second master chamber1114a, the pressurized medium may be introduced and discharged through a fifth hydraulic port hue and a sixth hydraulic port uhf. The fifth hydraulic port hue is connected to the third reservoir flow path1133to be described later to introduce the pressurized medium from the reservoir1120to the second master chamber1114a. A fifth sealing member1115eand a sixth sealing member1115fare respectively provided on a front side (left side with reference toFIGS.1and2) and a rear side (right side with reference toFIGS.1and2) of the fifth hydraulic port11e. Among the sealing members, the fifth sealing member1115eallows only the supply of the pressurized medium from the third reservoir flow path1133to the first master chamber1113aand blocks a flow of the pressurized medium in the opposite direction, thereby preventing the pressurized medium of the second master chamber1114afrom leaking into the third reservoir flow path1133through the fifth hydraulic port11e. The sixth hydraulic port1111fis connected to a circulation line1140to be described later to allow the pressurized medium of the second master chamber1114ato discharge the circulation line1140, or conversely, introduce the pressurized medium from the circulation line1140into the second master chamber1114a.

The second master piston1114is provided to be accommodated in the second master chamber1114a, pressurizing the pressurized medium accommodated in the second master chamber1114aby moving forward, or creating a negative pressure in the second master chamber1114aby moving backward. In particular, when the second master piston1114moves forward, as a volume of the second master chamber1114adecreases, the pressurized medium present in the second master chamber1114amay be pressurized to form a hydraulic pressure. On the contrary, when the second master piston1114moves backward, as the volume of the second master chamber1114aincreases, the pressure medium present in the second master chamber1114amay be decompressed, and at the same time, a negative pressure may be formed in the second master chamber1114a.

On the other hand, the integrated master cylinder1110according to the embodiment may utilize the simulation chamber1112a, the first master chamber1113a, and the second master chamber1114ato ensure a safety in the case of failure of component. For example, the simulation chamber1112aand the second master chamber1114amay be connected to a first hydraulic circuit1240including any two wheels of a right front wheel FR, a left front wheel FL, a left rear wheel RL and a right rear wheel RR through the first connection line1310described to be later, and the first master chamber1113amay be connected to the other two wheels through the second connection line1320. Accordingly, even when a problem such as a leak occurs in any one of the chambers, braking the vehicle may be possible.

The first piston spring1113band the second piston spring1114bare provided to elastically support the first master piston1113and the second master piston1114, respectively. To this end, the first piston spring1113bmay be disposed between a front surface (left end with reference toFIGS.1and2) of the first master piston1113and a rear surface (right end with reference toFIGS.1and2) of the second master piston1114, and the second piston spring1114bmay be disposed between a front surface (left end with reference toFIGS.1and2) of the second master piston1114and an inner surface of the cylinder block1211. When a displacement occurs in the first master piston1113and the second master piston1114according to an operation such as braking etc., the first piston spring1113band the second piston spring1114bare compressed, respectively. Thereafter, when the operation such as the braking etc., the first piston spring1113band the second piston spring1114bexpand by an elastic force and the first master piston1113and the second master piston1114may return to their original positions, respectively.

The elastic member1116is disposed between the simulation piston1112and the first master piston1113, and is provided to provide a pedal feeling of the brake pedal10to the driver by its own elastic restoring force. The elastic member1116may be made of a material such as compressible and expandable rubber, and when a displacement occurs in the simulation piston1112by the operation of the brake pedal10, the elastic member1116is compressed, and the driver may receive a stable and familiar pedal feel by an elastic restoring force of the elastic member1116.

The reservoir flow path may be provided to hydraulically connect the main reservoir1120and the integrated master cylinder1110. The reservoir flow path may include the first reservoir flow path1131connecting the simulation chamber1112aand the main reservoir1120, the second reservoir flow path1132connecting the first master chamber1113aand the main reservoir1120, and the third reservoir flow path1133connecting the second master chamber1114aand the main reservoir1120.

Explaining a pedal simulation operation by the integrated master cylinder1110, in a normal operation, the driver operates the brake pedal10and at the same time, a first cut valve1311and a second cut valve1321of the electrical unit to be described later are each closed, and a simulator valve1351is opened. As the operation of the brake pedal10proceeds, the simulation piston1112moves forward, but the first master chamber1113ais closed by a closing operation of the second cut valve1321, and the second master chamber1114ais synchronized with the simulation chamber1112aby the circulation line1140, so that the first master piston1113and the second master piston1114do not have a displacement sufficient to generate a hydraulic pressure in the first master chamber1113aand the second master chamber1114a. Accordingly, the displacement of the simulation piston1112compresses the elastic member1116, and the elastic restoring force by compression of the elastic member1116may be provided to the driver as a pedal feel. At this time, the pressurized medium accommodated in the simulation chamber1112ais transmitted to the main reservoir1120through the first connection line1310described later, a simulation flow path1350, and the third connection line1330. Thereafter, when the driver releases the pedal effort of the brake pedal10, as the simulator spring1112band the elastic member1116extend by the elastic forces, the simulation piston1112returns to its original position, so that the simulation chamber1112amay be refilled with the pressurized medium.

As such, because the inside of the simulation chamber1112a, the first master chamber1113a, and the second master chamber1114ais always filled with the pressurized medium, when the pedal simulation is operated, the friction between the simulation piston1112and the cylinder block1211is minimized, thereby improving the durability of the integrated master cylinder1110and preventing the inflow of foreign substances from the outside.

The electrical unit may include a component that is electronically operated and controlled by a control signal of the ECU (not shown).

The electrical unit includes the ECU, a hydraulic pressure supply device1210that generates hydraulic pressure by operating a hydraulic piston1212by an electrical signal output in response to the displacement of the brake pedal10, a hydraulic control unit1220including a plurality of valves to transmit a hydraulic pressure of the pressurized medium supplied from the hydraulic pressure supply device1210to wheel cylinders20and to control the hydraulic pressure at the same time, a dump control unit1230provided between the hydraulic pressure supply device1210and the main reservoir1120to control a flow of the pressurized medium, and the simulator valve1351that controls the operation of the simulation unit described above.

The hydraulic pressure supply device1210realizes reciprocating movement of the hydraulic piston1212by receiving the driver's braking intention as an electrical signal from a pedal displacement sensor that detects the displacement of the brake pedal10, and through this, the hydraulic pressure of the pressurized medium is generated.

The hydraulic pressure supply device1210may a hydraulic pressure supply unit that provides a pressure of the pressurized medium delivered to the wheel cylinders20, and a power supply unit (not shown) that generates power of the hydraulic piston1212based on an electrical signal of the pedal displacement sensor.

The hydraulic pressure supply unit includes the cylinder block1211in which the pressurized medium is accommodated, the hydraulic piston1212accommodated in the cylinder block1211, and a sealing member provided between the hydraulic piston1212and the cylinder block1211to seal pressure chambers.

The pressure chambers1213and1214may include a first pressure chamber1213positioned a front side (left direction of the hydraulic piston1212with reference toFIG.1) of the hydraulic piston1212, and a second pressure chamber1214positioned in a rear side (right direction of the hydraulic piston1212with reference toFIG.1) of the hydraulic piston1212. In other words, the first pressure chamber1213is partitioned by the cylinder block1211and a front surface of the hydraulic piston1212and is provided so that the volume varies according to a movement of the hydraulic piston1212, and the second pressure chamber1214is partitioned by the cylinder block1211and a rear surface of the hydraulic piston1212and is provided so that the volume varies according to the movement of the hydraulic piston1212.

The first pressure chamber1213may be hydraulically connected to the hydraulic control unit1220to be described later by a hydraulic flow path, and the second pressure chamber1214may also be hydraulically connected to the hydraulic control unit1220by a hydraulic flow path.

The sealing member may include a piston sealing member provided between the hydraulic piston1212and the cylinder block1211to seal between the first pressure chamber1213and the second pressure chamber1214, and a drive shaft sealing member provided between the power supply unit and the cylinder block1211to seal openings of the second pressure chamber1214and the cylinder block1211. The hydraulic pressure or negative pressure of the first pressure chamber1213and the second pressure chamber1214generated by forward or backward movements of the hydraulic piston1212may be sealed by the piston sealing member115and the drive shaft sealing member to transmitted to the hydraulic flow paths without a leakage.

The power supply unit may generate and provide a power to the hydraulic piston1212by an electrical signal. For example, the power supply unit may include a motor for generating a rotational force, and a power converter that converts the rotational force of the motor into a translational movement of the hydraulic piston1212, but is not limited to the corresponding structure and device.

The dump control unit1230may include a plurality of flow paths and various solenoid valves provided between the third connection line1330and the hydraulic pressure supply device1210, and the corresponding valves are electrically operated and controlled by the ECU.

The first pressure chamber1213and the second pressure chamber1214may be connected to the main reservoir1120by the dump control unit1230. The first pressure chamber1213and the second pressure chamber1214through the dump control unit1230may receive the pressurized medium from the main reservoir1120through the third connection line1330to be described later, or conversely, transmit the pressurized medium accommodated in the first pressure chamber1213and the second pressure chamber1214to the main reservoir1120through the third connection line1330.

The hydraulic control unit1220may be provided between the hydraulic pressure supply device1210and the wheel cylinders20and the operation thereof is controlled by the electronic control unit to adjust the hydraulic pressure transmitted to the wheel cylinders20.

The hydraulic control unit1220may include a first hydraulic circuit1240for controlling the flow of hydraulic pressure transmitted to first and second wheel cylinders21and22among the four wheel cylinders20, and a second hydraulic circuit1250for controlling the flow of the hydraulic pressure transmitted to third and fourth wheel cylinders23and24, and include a plurality of flow paths and solenoid valves to control the hydraulic pressure transmitted from the integrated master cylinder1110and the hydraulic pressure supply device1210to the wheel cylinders20.

The first and second hydraulic circuits1240and1250may include first to fourth inlet valves1241a,1241b,1251a, and1251bfor controlling the flow of the pressurized medium toward the first to fourth wheel cylinders20, respectively. The first to fourth inlet valves1241a,1241b,1251a, and1251bare respectively disposed on an upstream side of the first to fourth wheel cylinders20, and may be provided as a normally open type solenoid valves that is normally open and operates to be closed the valve when an electrical signal is received from the ECU.

The first and second hydraulic circuits1240and1250may include first to fourth check valves1243a,1243b,1253a, and1253bprovided to be connected in parallel to the first to fourth inlet valves1241a,1241b,1251a, and1251b. The check valves1243a,1243b,1253a, and1253bmay be provided in bypass flow paths to connect front and rear sides of the first to fourth inlet valves1241a,1241b,1251a, and1251bon the first and second hydraulic circuits1240and1250, and may allow only the flow of the pressurized medium from each wheel cylinder20to the hydraulic pressure supply device1210and block the flow of the pressurized medium from the hydraulic pressure supply unit1210to the wheel cylinders20. The first to fourth check valves1243a,1243b,1253a, and1253bmay quickly release the hydraulic pressure of the pressurized medium applied to each wheel cylinder20, and when the first to fourth inlet valves1241a,1241b,1251a, and1251bdo not operate normally, the hydraulic pressure of the pressurized medium applied to the wheel cylinder20may be smoothly returned to the hydraulic pressure supplying device1210side.

The first hydraulic circuit1240may include at least one first cut valve1311provided in the first connection line1310to be described later to improve performance when braking of the first and second wheel cylinders21and22is released. The first cut valves1311may be respectively provided by a couple on a downstream side of the first and second wheel cylinders21and22, or may be provided at a rear end of the point at which the downstream of the first and second wheel cylinders21and22join and are connected to the first connection line1310. The first cut valve1311may implement braking by transmitting the pressurized medium supplied from the integrated master cylinder1110to the first and second wheel cylinders21and22while maintaining an open state in an emergency, such as a fallback mode, or control depressurization of the wheel cylinders21and22by being selectively opened when decompression braking such as an anti-lock braking system (ABS) dump mode is required by detecting braking pressure of the first and second wheel cylinders21and22. The first cut valve1311may be provided as a normally open type solenoid valve that is normally open and operates to be closed the valve when an electric signal is received from the ECU.

The second hydraulic circuit1250may include first and second outlet valves1252aand1252bfor controlling the hydraulic pressure of the pressurized medium discharged to a first sub-line1332to be described later so as to improve performance when the third and fourth wheel cylinders23and24are released from braking. The first and second outlet valves1252aand1252bmay control depressurization of the wheel cylinders23and24by being selectively opened when decompression braking such as the ABS dump mode is required by detecting the braking pressure of the third and fourth wheel cylinders23and24. The first and second outlet valves1252aand1252bmay be provided as a normally closed type solenoid valve that is normally closed and operates to open the valve when an electrical signal is received from the ECU.

The simulator valve1351is electronically operated and controlled by the ECU and is disposed in the second block1200. A detailed description of the simulator valve1351will be described together with the simulation flow path1350below.

On the other hand, the electrical unit further includes a plurality of pressure sensors arranged in a variety of flow paths to detect a hydraulic pressure of the pressurized medium. InFIG.1, the pressure sensor is illustrated as being arranged on each of the first hydraulic circuit1240, the second hydraulic circuit1250, and the second connection line1320to be described later, but it is not limited to the corresponding positions and may include a case where it is provided in various positions of the electrical unit to detect the hydraulic pressure of the pressurized medium.

The connection lines1300are provided to hydraulically connect the first block1100of the mechanical unit and the second block1200of the electrical unit, which are arranged to be spaced apart from each other.

The connection lines1300may include the first connection line1310connecting the simulation chamber1112aof the integrated master cylinder1110to the first hydraulic circuit1240side, the second connection line1320connecting the first master chamber1113ato the second hydraulic circuit1250side, and the third connection line1330connecting the main reservoir1120to the hydraulic pressure supply device1210and the second hydraulic circuit1250, respectively.

The first connection line1310may be provided with one end communicating with the simulation chamber1112aand the other end thereof branching to the downstream side of the first and second wheel cylinders21and22of the first hydraulic circuit1240. At least one first cut valve1311may be provided on the downstream side of the first and second wheel cylinders21and22on the first connection line1310and control the flow of the pressurized medium between the simulation chamber1112aand the first and second wheel cylinders21and22.

The simulation flow path1350may be branched and provided at a front end of the point where the first cut valve1311is provided on the first connection line1310, and the simulation flow path1350may have one end branched to the first connection line1310and the other end thereof joined the first sub-line1332to be described later. The simulation flow path1350may be provided with that simulator valve1351that controls the flow of the pressurized medium delivered through the simulation flow path1350in both directions. The simulator valve1351may be provided as a normally closed type solenoid valve that is normally closed and operates to open the valve when an electrical signal is received from the ECU.

The bypass flow path1352may be provided in the simulation flow path1350arranged in parallel with the simulator valve1351. To this end, opposite ends of the bypass flow path1352may be respectively connected to front and rear sides of the simulator valve1351, and the simulator check valve1352that allows only the flow of the pressurized medium from the first sub-line1332toward the simulation chamber1112amay be provided on the bypass flow path1352.

In a normal operation of the electronic brake system1000, as the simulator valve1351is opened by the ECU, the pressurized medium accommodated in the simulation chamber1112amay be transmitted to the main reservoir1120by sequentially passing through the first connection line1310, the simulation flow path1350, the first sub-line1332, and a main line1331. Accordingly, an elastic member1116is compressed by the forward movement of the simulation piston1112, and the elastic restoring force by the compression of the elastic member1116is provided to the driver as a pedal feeling, as described above.

On the other hand, the second master chamber1114amay be joined to the first connection line1310by a circulation line1140, and the circulation line1140may be provided with an orifice for suppressing reduction of pulsation due to the change in the hydraulic pressure of the pressurized medium.

The second connection line1320may have one end connected to the first master chamber1113aand the other end thereof connected to the second hydraulic circuit1250side. InFIG.1, the other end of the second connection line1320is illustrated as being connected to the fourth wheel cylinder24, but includes a case in which the third and fourth wheel cylinders23and24are branched to the downstream side. The second cut valve1321for controlling the flow of the pressurized medium in both directions may be provided in the second connection line1320. The second cut valve1321may be provided as a normally open type solenoid valve that is normally open and operates to be closed the valve when a closing signal is received from the ECU.

As such, when the first and second cut valves1311and1321are closed, the pressure medium of the integrated master cylinder1110is prevented from being directly transmitted to the wheel cylinder20, and at the same time, the hydraulic pressure supplied from the hydraulic pressure supply device1210may be supplied to the wheel cylinders20through the hydraulic control unit1220, and when the first and second cut valves1321are opened, the pressurized medium pressurized in the integrated master cylinder1110may be directly supplied to the wheel cylinders20through the second connection line1320, thereby implementing braking.

The third connection line1330may include the main line1331communicating with the main reservoir1120, the first sub-line1332that is branched from the main line1331and connected to the second hydraulic circuit1250, and a second sub-line1333that is branched from the main line1331and connected to the hydraulic pressure supply device1210or the dump control unit1230.

The main line1331is in communication with the main reservoir1120and is connected to the first and second sub-lines1332and1333, and may hydraulically connect the main reservoir1120and the second hydraulic circuit1250, and the main reservoir1120and the hydraulic pressure supply device1210(or the dump control unit1230). As described above, the simulation flow path1350is branched from the first connection line1310and may join and be connected to the first sub-line1332. Accordingly, the pressurized medium discharged from the simulation chamber1112aand delivered to the simulation flow path1350may be supplied to the main reservoir1120through the first sub-line1332and the main line1331. The second sub-line1333is branched due to the hydraulic pressure supply device1210having the first pressure chamber1213and the second pressure chamber1214, and may be directly connected to the hydraulic pressure supply device1210, or connected to the hydraulic pressure supply device1210via the dump control unit1230.

The first connection line1310and the second connection line1320may be provided as a pipe having a predetermined strength, and the third connection line1330may be provided as a hose having elasticity. The first connection line1310and the second connection line1320transmit the pressure medium on which the hydraulic pressure is formed from the simulation chamber1112aand the first master chamber1113a, respectively, so the first connection line1310and the second connection line1320may be provide with a pipe having strength to withstand the hydraulic pressure, thereby promoting durability and performance of the product. On the other hand, the third connection line1330is provided in connection with the main reservoir1120having an internal pressure of the atmospheric pressure level, and thus the pressurized medium in which the hydraulic pressure is not formed is transmitted. Accordingly, the third connection line1330may be provided with a material having an elasticity that may be flexibly installed in response to installation position of the first block1100and the second block1200.

Hereinafter, a modified example of an electronic brake system according to an embodiment of the disclosure will be described.

The description of an electronic brake system1001according to the modified embodiment of the disclosure to be described below is the same as the description of the electronic brake system1000according to the embodiment of the disclosure described above except for cases where separate reference numerals are used to further describe the disclosure, and thus the description will be omitted to prevent duplication of content.

An electrical unit of the electronic brake system1001according to the modified embodiment of the disclosure may further include a sub-reservoir1280provided in the third connection line1330and arranged in the second block1200.

The sub-reservoir1280may be provided at a point where the first sub-line1332and the second sub-line1333are branched from the main line1331of the third connection line1330to auxiliary store the pressurized medium. Because the sub-reservoir1280stores the pressurized medium auxiliary in the electrical unit, the pressurized medium may be smoothly supplied and received within the electrical unit for example, the hydraulic pressure supply device1210, the dump control unit1230, the first and second hydraulic circuits1240and1250, and the like.

As described above, the electronic brake systems1000and1001according to the embodiment of the disclosure may be mounted to the vehicle in a state where the first block1100in which the mechanically operated mechanical unit is disposed and the second block1200in which the electronically operated and controlled electrical unit is disposed are physically separated from each other, so that the mountability of the vehicle is improved and the degree of design freedom of the vehicle is freed. Furthermore, the same electronic brake system1000and1001is applied regardless of whether the vehicle is a left-hand drive (LHD)/a right-hand drive (RHD), so that vehicle development can be facilitated and productivity of the product can be improved. Furthermore, the first block1100of the mechanical unit interworked with the brake pedal10is installed close to a passenger seat of the vehicle and the second block1200of the electrical unit that forms and adjusts hydraulic pressure while electronically operated and controlled is installed in a position spaced apart from the passenger seat of the vehicle, it is possible not only to suppress the noise generated in the process of generating and adjusting the hydraulic pressure of the pressurized medium from entering the passenger seat, but also to promote product competitiveness by reducing the cost for maintenance when any one of the first block1100and the second block1200fails.