KR20210036024A - Electric brake system - Google Patents

Abstract

An electronic brake system is disclosed. The electronic brake system according to the present embodiment includes a first block in which a mechanical unit operated mechanically in conjunction with a brake pedal is disposed, a second block and a first block are disposed in which an electronic unit electronically operated and controlled by the electronic control unit is disposed. It includes a connection line for hydraulically connecting the two blocks, and the first block and the second block can be installed at a location spaced apart from the vehicle, so that the mounting property of the brake system and the degree of freedom in designing the vehicle can be improved.

Description

Electric brake system

The present invention relates to an electronic brake system, and more particularly, to an electronic brake system that generates braking force by using an electrical signal corresponding to a displacement of a brake pedal.

Vehicles are essentially equipped with a brake system for performing braking, and various types of brake systems have been proposed for the safety of drivers and passengers.

In the conventional brake system, when the driver presses the brake pedal, a method of supplying hydraulic pressure required for braking to a wheel cylinder using a mechanically connected booster has been mainly used. However, as the demand of the market to implement various braking functions in detail in response to the operating environment of the vehicle is increasing, recently, when the driver presses the brake pedal, the driver's braking will is electrically controlled from a pedal displacement sensor that senses the displacement of the brake pedal. Electronic brake systems including a hydraulic pressure supply device for supplying hydraulic pressure required for braking to a wheel cylinder by receiving a signal are widely spread.

In such an electronic brake system, the driver's brake pedal operation is generated and provided as an electrical signal in the normal operation mode, and based on this, the hydraulic pressure supply device is electrically operated and controlled to form the hydraulic pressure required for braking and transmit it to the wheel cylinder. As described above, since such an electronic brake system is electrically operated and controlled, it is possible to implement complex and various braking actions, but if a technical problem occurs in an electric component element, the hydraulic pressure required for braking is not stably formed, so the safety of the passengers. There is a risk of threatening.

Therefore, the electronic brake system enters an abnormal operation mode when one component element fails or is in a state of inability to control. In this case, a mechanism in which the driver's brake pedal operation is directly linked to the wheel cylinder is required. In other words, in the abnormal operation mode of the electronic brake system, the hydraulic pressure required for braking is immediately formed as the driver applies a pedal effort to the brake pedal, and it must be transmitted directly to the wheel cylinder.

Meanwhile, in mounting the electronic brake system in a vehicle, there is a problem in that the degree of freedom in design of the vehicle is limited depending on the size of the system module and the limit of the installation location. Accordingly, there is a need for a way to efficiently install the system module while maintaining the braking performance of the vehicle.

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

The present embodiment is to provide an electronic brake system capable of reducing the number of parts and miniaturization and weight reduction of products.

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

The present embodiment is to provide an electronic brake system that can easily and efficiently perform installation and arrangement of a vehicle.

The present embodiment is to provide an electronic brake system capable of improving product assembly and productivity while reducing manufacturing cost of products.

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

In this implementation, it is intended to provide an electronic brake system capable of implementing stable and effective braking even in various operating situations.

According to an aspect of the present invention, a first block in which a mechanical unit operated mechanically in conjunction with a brake pedal is disposed, and an electronic unit electronically operated and controlled by an electronic control unit is disposed, and a first block is disposed spaced apart from the first block. 2 blocks and a connection line hydraulically connecting the first block and the second block, and the mechanism unit includes a main reservoir storing a pressurized medium, a first master piston connected to a brake pedal, and the first A first master chamber whose volume is changed by the displacement of the master piston, a second master piston provided to be displaceable by the hydraulic pressure of the first master chamber, and a second master piston whose volume is changed by the displacement of the second master piston. 2 A hydraulic pressure supply device that includes a master cylinder having a master chamber, wherein the electronic unit generates hydraulic pressure by operating a hydraulic piston according to an electrical signal output in response to a sub-reservoir storing a pressurized medium and a displacement of the brake pedal. And, a first hydraulic circuit having two wheel cylinders, and a second hydraulic circuit having two other wheel cylinders, and a plurality of components to control hydraulic pressure transmitted to the first hydraulic circuit and the second hydraulic circuit. A hydraulic control unit having a flow path and a valve of, and the electronic control unit, wherein the connection line includes a first connection line connecting the first master chamber to the first hydraulic circuit, and the second master chamber. A second connection line connected to the second hydraulic circuit side and a third connection line connected to the main reservoir and the sub reservoir may be provided.

The electronic unit further comprises a simulation flow path branched from the second connection line and connected to the sub reservoir, a pedal simulator provided in the simulation flow path, and a simulator valve provided in the simulation flow path to control the flow of the pressurized medium. Can be provided.

The electronic unit may be provided on the second connection line between a point at which the second master chamber and the simulation flow path diverge, and may further include an inspection valve for controlling the flow of the pressurized medium.

The electronic unit is provided between a first cut valve provided on the first connection line to control the flow of the pressurized medium, and between the second hydraulic circuit and a point at which the simulation flow path diverges on the second connection line, It may be provided further comprising a second cut valve for controlling the flow.

The electronic unit may further include a first sub reservoir flow path connecting the first hydraulic circuit and the sub reservoir, and a second sub reservoir flow path connecting the second hydraulic circuit and the sub reservoir.

The electronic unit may further include a dump control unit provided between the hydraulic pressure supply device and the sub reservoir and including a plurality of flow paths and valves to control the flow of the pressurized medium.

The electronic unit may further include a third sub reservoir flow path connecting the dump control unit and the sub reservoir.

The first hydraulic circuit includes a first inlet valve and a second inlet valve for controlling the flow of the pressurized medium supplied from the hydraulic pressure supply device to the first wheel cylinder and the second wheel cylinder, respectively, and the first wheel cylinder and the first wheel cylinder. 2 The pressurized medium discharged from the wheel cylinder is supplied to the first sub-reservoir flow path, and includes a first outlet valve and a second outlet valve for controlling it, and the second hydraulic circuit is provided from the hydraulic pressure supply device to the third wheel cylinder and The third inlet valve and the fourth inlet valve for controlling the flow of the pressurized medium supplied to the fourth wheel cylinder, and the pressurizing medium discharged from the third wheel cylinder and the fourth wheel cylinder are routed to the second sub-reservoir flow path. Although supplied, it may be provided including a third outlet valve and a fourth outlet valve for controlling the same.

The simulation flow path may be connected to the sub reservoir by joining the second sub reservoir flow path.

The sub-reservoir includes a first sub-chamber partitioned on one side, a second sub-chamber partitioned on the other side, and a third sub-chamber partitioned at a center, and the first sub-reservoir flow path is The first sub-chamber is in communication, the second sub-reservoir flow path is in communication with the second sub-chamber, and the third sub-reservoir flow path may be in communication with the third sub-chamber.

The mechanism unit may further include a first main reservoir passage connecting the main reservoir and the first master chamber, and a second main reservoir passage connecting the main reservoir and the second master chamber.

The main reservoir includes a first main chamber partitioned on one side, a second main chamber partitioned on the other side, and a third main chamber partitioned on a center side, and the first main reservoir flow path comprises the The first main chamber is in communication, the second main reservoir flow path is in communication with the second main chamber, and the third connection line may be in communication with the third main chamber.

The first connection line and the second connection line may be provided with a rigid pipe, and the third connection line may be provided with an elastic hose.

The electronic unit includes a first bypass flow path connected in parallel to the simulator valve on the simulation flow path, and a simulator that is provided in the first bypass flow path and allows only the flow of braking fluid from the pedal simulator to the second connection line. It may be provided further including a check valve.

The electronic unit includes a second bypass flow path provided in parallel with respect to the inspection valve on the second connection line, and a flow of a braking fluid from the second master chamber to the second hydraulic circuit provided in the second bypass flow path. It may be provided further comprising a check valve that allows only.

The electronic unit may further include a pressure sensor for measuring the hydraulic pressure of the pressurized medium provided from the hydraulic pressure supply device.

The pedal simulator includes a simulation piston provided to be displaceable by the hydraulic pressure of the pressurized medium supplied from the second connection line, a simulation chamber in which a volume is changed by the displacement of the simulation piston, and a simulation for elastically supporting the simulation piston It may be provided including a spring.

The electronic brake system according to the present embodiment can reduce the number of parts, and reduce the size and weight of the product.

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 installation and arrangement of a vehicle.

The electronic brake system according to an embodiment of the present invention can improve product assembly and productivity, and at the same time reduce the manufacturing cost of the product.

The electronic brake system according to the present embodiment may improve product performance and operational reliability.

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

1 is a hydraulic circuit diagram showing an electronic brake system according to the present embodiment.
2 is a hydraulic circuit diagram showing a state in which the electronic brake system according to the present embodiment performs a normal operation mode.
3 is a hydraulic circuit diagram showing a state in which the electronic brake system according to the present embodiment performs an abnormal operation mode (fallback mode).
4 is a hydraulic circuit diagram showing a state in which an inspection mode for determining whether a simulator valve is leaked according to the present embodiment is performed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented in order 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 exemplary embodiments presented here, but may be embodied in other forms. In the drawings, in order to clarify the present invention, portions not related to the description may be omitted, and the size of components may be slightly exaggerated to aid understanding.

1 is a hydraulic circuit diagram showing an electronic brake system 1000 according to the present embodiment.

Referring to FIG. 1, in the electronic brake system 1000 according to the present embodiment, a first block 1100 in which a mechanical unit operating mechanically is disposed, and a second block 1200 in which an electronic unit operated and controlled electronically is disposed. And, a connection line 1300 hydraulically connecting the first block 1100 and the second block 1200 may be provided.

The first block 1100 is connected to and interlocked with the brake pedal 10 to provide a mechanical unit that operates mechanically, and the second block 1200 is a valve and sensor whose operation is controlled by an electronic control unit (not shown). Electronic parts that are electronically operated and controlled are arranged. The first block 1100 and the second block 1200 are disposed to be spaced apart from each other in the vehicle, but may be hydraulically connected by a plurality of connection lines 1300, thereby improving the vehicle mountability of the electronic brake system 1000. Furthermore, efficient space arrangement may be possible by promoting a degree of freedom in designing a vehicle.

The mechanism unit includes component elements that perform 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 1100.

The mechanism unit includes a main reservoir 1120 in which a pressurized medium such as brake oil is stored, a master cylinder 1110 for pressurizing and discharging the pressurized medium accommodated inside according to the foot force of the brake pedal 10, the main reservoir 1120 and the master. It may include main reservoir flow paths 1131 and 1132 connecting the cylinder 1110.

The master cylinder 1110 is configured to have at least one hydraulic chamber, and can pressurize and discharge the pressure medium inside. The master cylinder 1110 includes a first master chamber 1111a and a second master chamber 1112a, and a first master piston 1111 and a second master piston 1112 provided in each of the master chambers 1111a and 1112a. Can be equipped.

The first master chamber 1111a may be formed on the inlet side (right side based on FIG. 1) of the cylinder block 1119 to which the brake pedal 10 is connected, and a first master piston in the first master chamber 1111a (1111) can be accommodated to be reciprocating.

In the first master chamber 1111a, a pressurized medium may be introduced and discharged through the first hydraulic port 1115a and the second hydraulic port 1115b. The first hydraulic port 1115a is connected to the first main reservoir flow path 1131 to be described later, so that the pressurizing medium flows from the main reservoir 1120 to the first master chamber 1111a, and is in front of the first hydraulic port 1115a. A first sealing member 1116a and a second sealing member 1116b are provided in the (left side based on Fig. 1) and the rear side (right side based on Fig. 1), respectively, and the first master chamber 1111a is connected to the main reservoir 1120. Can be sealed against. The second hydraulic port 1115b is connected to the first connection line 1310, which will be described later, so that the pressurized medium of the first master chamber 1111a is discharged to the first connection line 1310, or conversely, the first connection line 1310 The pressurized medium may be introduced into the first master chamber 1111a.

The first master piston 1111 is accommodated and provided in the first master chamber 1111a, but pressurizes the pressurized medium accommodated in the first master chamber 1111a by moving forward, or in the interior of the first master chamber 1111a by moving backward. It can create negative pressure. Specifically, when the first master piston 1111 moves forward, as the volume of the first master chamber 1111a decreases, the pressurized medium present in the first master chamber 1111a may be pressurized to form a hydraulic pressure. . On the contrary, as the volume of the first master chamber 1111a increases when the first master piston 1111 moves backward, the pressurized medium present in the first master chamber 1111a may be depressurized, and at the same time, the first master piston 1111 A negative pressure may be formed in the master chamber 1111a.

The second master chamber 1112a may be formed inside the first master chamber 1111a on the cylinder block 1119 (left side based on FIG. 1), and the second master piston ( 1112) may be accommodated to be reciprocating.

In the second master chamber 1112a, the pressurized medium may be introduced and discharged through the third hydraulic port 1115c and the fourth hydraulic port 1115d. The third hydraulic port 1115c is connected to the second main reservoir flow path 1132, which will be described later, so that the pressurized medium flows from the main reservoir 1120 to the second master chamber 1112a, and is in front of the third hydraulic port 1115c. A third sealing member 1116c and a fourth sealing member 1116d are provided at the (left side based on FIG. 1) and the rear side (right side based on FIG. 1), respectively, so that the second master chamber 1112a is connected to the main reservoir 1120. Can be sealed against. The fourth hydraulic port 1115d is connected to a second connection line 1320 to be described later, so that the pressurized medium of the second master chamber 1112a is discharged to the second connection line 1320 or, conversely, the second connection line 1320 The pressurized medium may be introduced into the second master chamber 1112a.

The second master piston 1112 is accommodated and provided in the second master chamber 1112a, but pressurizes the pressurized medium accommodated in the second master chamber 1112a by moving forward, or in the interior of the second master chamber 1112a by moving backward. It can create negative pressure. Specifically, when the second master piston 1112 advances, as the volume of the second master chamber 1112a decreases, the pressurized medium present in the second master chamber 1112a may be pressurized to form a hydraulic pressure. . Conversely, when the second master piston 1112 moves backward, as the volume of the second master chamber 1112a increases, the pressurized medium present in the second master chamber 1112a may be depressurized, and at the same time, the pressurized medium may be depressurized. 2 A negative pressure may be formed in the master chamber 1112a.

On the other hand, the master cylinder 1110 according to the present embodiment has two master chambers 1111a and 1112a independently, so that safety in case of a failure of a component element can be secured. For example, the first master chamber 1111a is one of the right front wheel FR, the left front wheel FL, the left rear wheel RL, and the right rear wheel RR of the vehicle through a first connection line 1310 to be described later. It is connected to a first hydraulic circuit 1230 having wheels, and the second master chamber 1112a may be connected to a second hydraulic circuit 1240 having two other wheels through a second connection line 1320, and Accordingly, even when a problem such as a leak occurs in any one of the chambers, it may be possible to brake the vehicle.

The first piston spring 1114a and the second piston spring 1114b are provided to elastically support the first master piston 1111 and the second master piston 1112, respectively. To this end, the first piston spring 1114a is between the front surface of the first master piston 1111 (the left end of Fig. 1) and the rear surface of the second master piston 1112 (the right end of Fig. 1). The second piston spring 1114b may be disposed between the front surface of the second master piston 1112 (left end with reference to FIG. 1) and the inner surface of the cylinder block 1119. When displacement occurs in the first master piston 1111 and the second master piston 1112 according to the operation of braking, etc., the first piston spring 1114a and the second piston spring 1114b are respectively compressed, and then braking, etc. When released by the operation of the first piston spring 1114a and the second piston spring 1114b expand by elastic force, the first master piston 1111 and the second master piston 1112 may return to their original positions, respectively. .

The main reservoir flow path is provided to hydraulically connect the main reservoir 1120 and the master cylinder 1110. The main reservoir passage is a first main reservoir passage 1131 connecting the first master chamber 1111a and the main reservoir 1120, and a second main reservoir connecting the second master chamber 1112a and the main reservoir 1120. It may include a flow path (1132).

The main reservoir 1120 accommodates and stores a pressurized medium therein, but may be divided into a plurality of chambers and provided. The main reservoir 1120 is partitioned on one side, the first main chamber 1121 connected to the first main reservoir passage 1131, and the main reservoir 1120 partitioned on the other side of the main reservoir 1120, and connected to the second main reservoir passage 1132 It includes a second main chamber 1122 and a third main chamber 1123 partitioned on the central side of the main reservoir 1120 and connected to a third connection line 1330 to be described later to communicate with the sub reservoir 1280 can do. As described above, the main reservoir 1120 is partitioned by a partition wall, but the chambers 1121, 1122, and 1123 are provided to communicate with each other, so that the first main reservoir flow path 1131, the second main reservoir flow path 1132, and the third connection The pressurized medium may be stably delivered and provided through the line 1330. Furthermore, since the inside of the first master chamber 1111a and the second master chamber 1112a is always filled with a pressurized medium, friction between the master pistons 1111 and 1112 and the cylinder block 1119 is minimized. In addition to improving the durability of the master cylinder 1110, the inflow of foreign substances from the outside may be blocked.

The electronic unit includes component elements that are electronically operated and controlled by a control signal from an electronic control unit (ECU, not shown), and may be disposed in the second block 1200.

The electronic unit generates hydraulic pressure by operating the hydraulic piston 1212 by an electronic control unit, a sub reservoir 1280 that auxiliaryly stores a pressurized medium inside, and an electrical signal output in response to the displacement of the brake pedal 10. A hydraulic control unit 1220 having a hydraulic pressure supply device 1210 to control and a plurality of valves to control the hydraulic pressure while transferring the hydraulic pressure of the pressurized medium provided from the hydraulic pressure supply device 1210 to the wheel cylinder 20, and , A simulation device 1250 that provides a reaction force against the driver's brake pedal 10, and a dump control unit 1260 provided between the hydraulic pressure supply device 1210 and the sub reservoir 1280 to control the flow of the pressurized medium. Wow, the inspection unit 1270 for diagnosing a leak of the simulator valve 1253 of the simulation device 1250, and the first hydraulic circuit 1230 and the second hydraulic circuit 1240 of the hydraulic control unit 1220 are sub-reservoirs ( The sub-reservoir flow paths 1291 and 1292 connected to the 1280 may be included.

The sub reservoir 1280 may be disposed in the second block 1200 to auxiliaryly store the pressurized medium. The pressurized medium in the electronic part such as the hydraulic supply device 1210, the dump control part 1260, and the first and second hydraulic circuits 1230 and 1240 as the sub reservoir 1280 stores the pressurized medium auxiliary in the electronic part. Can be supplied and delivered smoothly.

The sub reservoir 1280 may be connected to the main reservoir 1120 of the mechanism unit by a third connection line 1330 to be described later, and by a first sub reservoir flow path 1291 and a second sub reservoir flow path 1292 to be described later. It may be connected to the first hydraulic circuit 1230 and the second hydraulic servo 1240, respectively. A detailed description of this will be described later.

The hydraulic pressure supply device 1210 implements the reciprocating movement of the hydraulic piston 1212 by receiving the driver's braking intention as an electrical signal from the pedal displacement sensor 11 that senses the displacement of the brake pedal 10, and through this, the pressurized medium It is provided to generate a hydraulic pressure of.

The hydraulic pressure supply device 1210 includes a hydraulic pressure supply unit that provides a pressurized medium pressure transmitted to the wheel cylinder 20, and a power agent that generates power of the hydraulic piston 1212 based on an electrical signal from the pedal displacement sensor 11. May include study (not shown).

The hydraulic pressure providing unit includes a cylinder block 1211 in which a pressurizing medium is provided to be accommodated, a hydraulic piston 1212 accommodated in the cylinder block 1211, and pressure chambers 1213 and 1214 partitioned by the hydraulic piston 1212. And, a sealing member 1215 provided between the hydraulic piston 1212 and the cylinder block 1211 to seal the pressure chambers 1213 and 1214.

The pressure chambers 1213 and 1214 include a first pressure chamber 1213 located in front of the hydraulic piston 1212 (left side of the hydraulic piston 1212 based on FIG. 1), and the rear of the hydraulic piston 1212 (Fig. It may include a second pressure chamber 1214 located on the right side of the hydraulic piston 1212 with reference to 1). That is, the first pressure chamber 1213 is partitioned by the cylinder block 1211 and the front surface of the hydraulic piston 1212 so that the volume varies according to the movement of the hydraulic piston 1212, and the second pressure chamber 1214 ) Is partitioned by the cylinder block 1211 and the rear surface of the hydraulic piston 1212 so that the volume is changed according to the movement of the hydraulic piston 1212.

The first pressure chamber 1213 may be hydraulically connected to the hydraulic control unit 1220 to be described later by a hydraulic flow path, and the second pressure chamber 1214 is also hydraulically connected to the hydraulic control unit 1220 by a hydraulic flow path. Can be connected.

The sealing member 1215 is provided between the hydraulic piston 1212 and the cylinder block 1211 to seal between the first pressure chamber 1213 and the second pressure chamber 1214, a piston sealing member 1215a, and a power supply unit. And a drive shaft sealing member 1215b provided between the cylinder block 1211 and sealing the opening of the second pressure chamber 1214 and the cylinder block 1211. The hydraulic or negative pressure of the first pressure chamber 1213 and the second pressure chamber 1214 generated by the forward or backward movement of the hydraulic piston 1212 is sealed by the piston sealing member 1215a and the drive shaft sealing member 1215b. It does not leak and can be delivered to the hydraulic flow path.

The power supply unit may generate and provide power of the hydraulic piston 1212 by an electric signal. As an example, the power supply unit may include a motor that generates rotational force, and a power conversion unit that converts the rotational force of the motor into translational movement of the hydraulic piston 1212, but is not limited to the structure and apparatus.

The hydraulic control unit 1220 is provided between the hydraulic pressure supply device 1210 and the wheel cylinder 20 and is provided to control the hydraulic pressure transmitted to the wheel cylinder 20 by controlling the operation by the electronic control unit.

The hydraulic control unit 1220 includes a first hydraulic circuit 1230 for controlling the flow of hydraulic pressure delivered to the first and second wheel cylinders 21 and 22 among the four wheel cylinders 20, and the third and third wheel cylinders. 4 A second hydraulic circuit 1230 that controls the flow of hydraulic pressure delivered to the wheel cylinders 23 and 24 may be provided, and is transmitted from the master cylinder 1110 and the hydraulic pressure supply device 1210 to the wheel cylinder 20 It includes a plurality of hydraulic flow paths and solenoid valves to control the hydraulic pressure.

The first and second hydraulic circuits 1230 and 1240 include first to fourth inlet valves 1231a, 1231b, 1241a, and 1241b respectively controlling the flow of the pressurized medium toward the first to fourth wheel cylinders 20. Can include. The first to fourth inlet valves 1231a, 1231b, 1241a, and 1241b are disposed on the upstream side of the first to fourth wheel cylinders 21, 22, 23, and 24, respectively, and are open during normal operation but electronically controlled. It may be provided as a normal open type solenoid valve that operates to close the valve when an electric signal is received from the unit.

The first and second hydraulic circuits 1230 and 1240 are provided with first to fourth check valves 1233a, 1233b, and 1243a connected in parallel with respect to the first to fourth inlet valves 1231a, 1231b, 1241a, and 1241b. , 1243b). The check valves 1233a, 1233b, 1243a, 1243b are bypasses connecting the front and rear of the first to fourth inlet valves 1231a, 1231b, 1241a, 1241b on the first and second hydraulic circuits 1230, 1240 It may be provided in the flow path, allows only the flow of the pressurized medium toward the hydraulic control unit 1220 from each wheel cylinder 20, the flow of the pressurized medium toward the wheel cylinder 20 may be blocked. The first to fourth check valves 1233a, 1233b, 1243a, 1243b can quickly remove the hydraulic pressure of the pressurized medium applied to each wheel cylinder 20, and the first to fourth inlet valves 1231a, 1231b, Even when 1241a and 1241b do not operate normally, the hydraulic pressure of the pressurized medium applied to the wheel cylinder 20 can be smoothly returned to the hydraulic pressure supply device 1210 side.

The first hydraulic circuit 1230 is a first for controlling the flow of the pressurized medium discharged to the first sub-reservoir flow path 1291, which will be described later, to improve performance when braking of the first and second wheel cylinders 21 and 22 is released. An outlet valve 1232a and a second outlet valve 1232b may be included. The first and second outlet valves 1232a and 1232b sense the braking pressure of the first and second wheel cylinders 21 and 22, and are selectively opened when decompression braking is required, such as in the ABS dump mode. The pressure reduction of the cylinders 21 and 22 can be controlled. The first and second outlet valves 1232a and 1232b may be provided as a normally closed type solenoid valve that operates in a normally closed state and opens the valve upon receiving an electrical signal from the electronic control unit. .

The second hydraulic circuit 1240 controls the flow of the pressurized medium discharged to the first sub-reservoir flow path 1292, which will be described later, to improve performance when the third and fourth wheel cylinders 23 and 24 are brake released. It may include outlet valves and fourth outlet valves 1242a and 1242b. The third and fourth outlet valves 1242a and 1242b sense the braking pressure of the third and fourth wheel cylinders 23 and 24 and are selectively opened when decompression braking is required, such as in the ABS dump mode. The pressure reduction of the cylinders 23 and 24 can be controlled. Like the first and second outlet valves 1232a and 1232b, the third and fourth outlet valves 1242a and 1242b are normally closed and operate to open the valve upon receiving an electrical signal from the electronic control unit. It may be provided as a normally closed type solenoid valve.

The simulation device 1250 is provided to provide a reaction force against the driver's foot force for operating the brake pedal 10.

The simulation device 1250 branches from the second connection line 1320 to be described later, joins the second sub-reservoir flow path 1292 to be described later, and corresponds to the pedal effort applied by the driver to the brake pedal 10. ) Provides a reaction force, thereby providing a pedal feel to the driver, and thus a detailed operation of the brake pedal 10 can be achieved, and accordingly, the braking force of the vehicle can also be finely adjusted.

The simulation device 1250 includes a simulation flow path 1251 branched from a second connection line 1320 to be described later and connected to the sub reservoir 1280, a pedal simulator 1252 provided in the simulation flow path 1251, and a pedal simulator. A simulator valve 1253 provided at the front end of 1252 to control the flow of the pressurized medium, a first bypass flow path 1254 provided in parallel with respect to the simulator valve 1253 on the simulation flow path 1251, and a first It may include a simulator check valve 1255 provided in the bypass flow path 1254 to control the flow of the braking fluid.

The simulation flow path 1251 is branched from the second connection line 1320 connecting the second master chamber 1112a and the second hydraulic circuit 1240, and merges with the second sub-reservoir flow path 1292 to be described later to form a sub-reservoir. It can be connected with (1280).

The pedal simulator 1252 has a simulation piston 1252a provided to be displaceable by a pressurized medium flowing from the second connection line 1320, and a sub reservoir 1280 whose volume is changed by the displacement of the simulation piston 1252a. It includes a simulation chamber 1252b communicating with the side, 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 a pressurized medium introduced through the second connection line 1320 and the simulation flow path 1251. Specifically, displacement is generated in the simulation piston 1252a by the hydraulic pressure of the pressurized medium transmitted to the front surface (right side of Fig. 1) of the simulation piston 1252a through the simulation flow path 1251, and the simulation piston ( 1252a), the volume of the simulation chamber 1252b formed on the rear surface of the simulation piston 1252a (the left surface based on FIG. 1) is changed, and the pressurized medium accommodated in the simulation chamber 1252b becomes the second sub It may be supplied to the sub reservoir 1280 through the reservoir flow path 1292. The simulation spring 1252c elastically supports the simulation piston 1252a and is compressed according to the displacement of the simulation piston 1252a, and an elastic restoring force thereof is transmitted to the driver, so that the driver can receive a pedal feel.

Meanwhile, the simulation spring 1252c shown in the drawing is provided as a coil spring as an example capable of providing elastic force to the simulation piston 1252a, but in addition, it has various structures capable of storing elastic force and providing elastic restoring force at the same time. Can be done. 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 valve 1253 may be provided on the simulation flow path 1251 connecting the second connection line 1320 and the pedal simulator 1252 to control the flow of the pressurized medium. The simulator valve 1253 may be provided as a normally closed type solenoid valve that maintains a normally closed state, and the simulator valve 1253 is opened when the driver applies a foot pressure to the brake pedal 10. The pressurized medium flowing from the second master chamber 1112a to the simulation flow path 1251 through the second connection line 1320 may be transferred to the front surface of the simulation piston 1252a.

A simulator check valve 1255 connected in parallel to the simulator valve 1254 may be provided in the simulation flow path 1251. Specifically, the simulator check valve 1255 is provided in the first bypass flow path 1254 connecting the front end and the rear end of the simulator valve 1253 on the simulation flow path 1251, and a second connection line from the pedal simulator 1252 It is provided to allow only the flow of the pressurized medium to the 1320. Accordingly, when the driver applies the pedal effort to the brake pedal 10, the pressurized medium in the second master chamber 1112a sequentially passes through the second connection line 1320 and the simulator valve 1253 of the simulation flow path 1251. The second connection line 1320 is transmitted to the pedal simulator 1252, but when the pedal force of the brake pedal 10 is released, the pressurizing medium on the front side of the simulation piston 1252a is through the simulator valve 1253 and the simulator check valve 1255. And by returning to the second master chamber (1112a), it is possible to achieve a quick return of the pressurized medium. Furthermore, even when the hydraulic pressure of the pressurized medium for pressing the simulation piston 1252a is higher than the hydraulic pressure of the pressurized medium on the second master chamber 1112a or the second connection line 1320, the second master chamber ( 1112a), the pedal simulator 1252 can quickly return to the ready-to-operation state.

When the operation of the simulation device 1250 is described, when the driver applies the pedal effort by operating the brake pedal 10, the simulator valve 1253 is opened and the pressurized medium in the second master chamber 1112a is transferred to the second connection line 1320. ) And the simulation flow path 1251 are sequentially supplied and pressurized to the front surface of the simulation piston 1252a, thereby generating displacement in the simulation piston 1252a and compressing the simulation spring 1252c by elastic restoring force. It provides a pedal feel to the driver. At this time, the second cut valve 1321 provided in the second connection line 1320 is closed, so that the pressurized medium discharged from the second master chamber 1112a may be completely supplied to the simulation flow path 1251. The pressurized medium filled in the simulation chamber 1252b is transferred to the sub reservoir 1280 through the second sub reservoir flow path 1292. Thereafter, when the driver releases the pedal effort of the brake pedal 10, the simulation spring 1252c expands due to the elastic force, and the simulation piston 1252a returns to its original position, and the pressurizing medium that pressed the front surface of the simulation piston 1252a It is supplied to the second connection line 1320 through the simulator valve 1254 and the simulator check valve 1255 and returns to the second master chamber 1112a. At this time, a pressurized medium is supplied to the simulation chamber 1252b from the sub-reservoir 1280 through the second sub-reservoir flow path 1292, so that the inside of the simulation chamber 1252b may be filled with the pressurized medium again.

In this way, since the inside of the simulation chamber 1252b is always filled with a pressurized medium, friction of the simulation piston 1252a is minimized when the pedal simulator 1252 is operated, thereby improving the durability of the pedal simulator 1252 as well as external The inflow of foreign substances from it may be blocked.

The dump control unit 1260 is provided between the sub reservoir 1280 and the hydraulic pressure supply device 1210, and may include a plurality of flow paths and various solenoid valves, and the valves are electrically operated and controlled by the electronic control unit. .

The first pressure chamber 1213 and the second pressure chamber 1214 may be connected to the sub reservoir 1280 through the dump control unit 1260. Specifically, the first pressure chamber 1213 and the second pressure chamber 1214 are connected to a third sub reservoir flow path 1293 to be described later through the dump control unit 1260, and the third sub reservoir flow path 1293 is dumped. The control unit 1260 and the sub reservoir 1280 are connected. Accordingly, the first pressure chamber 1213 and the second pressure chamber 1214 through the third sub-reservoir flow path 1293 and the dump control unit 1260 receive and receive the pressurized medium from the sub-reservoir 1280, or vice versa. The pressure medium accommodated in the 1 pressure chamber 1213 and the second pressure chamber 1214 may be transferred to the sub reservoir 1280 through the dump control unit 1260 and the third sub reservoir flow path 1293.

The inspection unit 1270 is provided to diagnose or determine whether the simulator valve 1253 of the simulation apparatus 1250 leaks.

The inspection unit 1270 includes an inspection valve 1271 provided on the second connection line 1320 at the front end of the point where the simulation flow path 1251 is branched, and the front end of the inspection valve 1271 on the second connection line 1320. A second bypass flow path 1272 connected by bypassing the rear end, and an inspection check valve 1273 provided in the second bypass flow path 1272 are included.

The inspection valve 1271 allows and blocks the hydraulic pressure provided from the hydraulic pressure supply device 1210 from being transferred to the second master chamber 1112a along the second connection line 1320, thereby allowing the simulator valve of the simulation device 1250 ( 1253) can be determined. A detailed description of this will be described later with reference to FIG. 4.

The inspection check valve 1273 may be provided in the second bypass flow path 1272 and may be provided in parallel with the inspection valve 1271. The inspection check valve 1273 controls the flow of the pressurized medium transferred along the second bypass flow path 1272, but only allows the flow of the pressurized medium from the second master chamber 1112a to the second hydraulic circuit 1240. I can. Accordingly, the pressurized medium discharged from the second master chamber 1112a can be smoothly transferred to the simulation apparatus 1250 side or the second hydraulic circuit 1240 side along the second connection line 1320.

The first cut valve 1311 and the second cut valve 1321 are provided in the first connection line 1310 and the second connection line 1320 to be described later, respectively, and are provided to control the flow of the pressurized medium. The first cut valve 1311 and the second cut valve 1321 are operated and controlled by receiving electrical signals from the electronic control unit, and are provided in the second block 1200 in which the electronic unit is disposed. A detailed description of this will be described later together with the connection line 1300.

The sub reservoir flow path is provided to hydraulically connect the first hydraulic circuit 1230, the second hydraulic circuit 1240, and the dump control unit 1260 to the sub reservoir 1280. The sub reservoir flow path is a first sub reservoir flow path 1291 connecting the first hydraulic circuit 1230 and the sub reservoir 1280, and a second sub reservoir connecting the second hydraulic circuit 1240 and the sub reservoir 1280. It may include a flow path 1292 and a third sub reservoir flow path 1293 connecting the dump control unit 1260 or the hydraulic pressure supply device 1210 and the sub reservoir 1280.

The sub reservoir 1280 accommodates and stores the pressurized medium therein, but may be divided into a plurality of chambers and provided. The sub-reservoir 1280 is partitioned on one side and connected to the first sub-chamber 1281 and connected to the first sub-reservoir passage 1291 and the second sub-reservoir passage 1292 A second sub-chamber 1282 to be formed, and a third sub-chamber 1283 partitioned at a central portion of the sub-reservoir 1280 and connected to the second sub-reservoir flow path 1293 may be included. In this way, the sub reservoir 1280 is partitioned by a partition wall, but the chambers 1281, 1282, and 1283 are provided to communicate with each other, so that the first sub reservoir flow path 1291, the second sub reservoir flow path 1292 and the third sub The pressurized medium may be stably transmitted and provided through the reservoir flow path 1293.

The electronic unit further includes a plurality of pressure sensors PS that are disposed in various flow paths to sense the hydraulic pressure of the pressurized medium. In FIG. 1, the pressure sensor PS is shown to be disposed on the second hydraulic circuit 1240 and the first connection line 1310 to be described later, but is not limited to the corresponding position and is disposed in the electronic unit to provide a master cylinder. It goes without saying that if the hydraulic pressure of the pressurized medium discharged from 1110 and the hydraulic pressure of the pressurized medium discharged from the hydraulic pressure supply device 1210 can be sensed, it may be provided in various positions.

The connection line 1300 is provided to hydraulically connect the first block 1100 of the mechanical unit and the second block 1200 of the electronic unit disposed to be spaced apart from each other.

The connection line 1300 includes a first connection line 1310 connecting the first master chamber 1111a of the master cylinder 1110 to the first hydraulic circuit 1230 side, and the second master chamber 1110 of the master cylinder 1110 ( A second connection line 1310 that connects 1112a to the second hydraulic circuit 1230 side, and a third connection line 1330 that connects the main reservoir 1120 and the sub reservoir 1280 to each other.

The first connection line 1310 has one end in communication with the first master chamber 1111a of the master cylinder 1110, and the other end toward the first and second wheel cylinders 21 and 22 of the first hydraulic circuit 1230. It can be provided by branching. A first cut valve 1311 is provided in the first connection line 1310 to control the flow of the pressurized medium between the first master chamber 1111a and the first and second wheel cylinders 21 and 22.

The first cut valve 1311 may be provided as a solenoid valve of a normal open type that operates to close when a closing signal is received from the electronic control unit after being opened normally. Accordingly, when the first cut valve 1311 is closed, the pressurized medium in the first master chamber 1111a is prevented from being transferred to the first hydraulic circuit 1230 and is provided from the hydraulic pressure supply device 1210. It is possible to prevent the hydraulic pressure from being transmitted to the master cylinder 1110 side. In addition, when the first cut valve 1311 is opened, the pressurized medium in the first master chamber 1111a passes through the first connection line 1310 to the first and second wheel cylinders 21 of the first hydraulic circuit 1230. , 22) to implement braking. At this time, since the first and second inlet valves 1231a and 1231b are open when they are not in operation, there is no need to change the operating state.

The second connection line 1320 may be provided at one end communicating with the second master chamber 1112a, and the other end branching toward the third and fourth wheel cylinders 23 and 24 of the second hydraulic circuit 1240. . A second cut valve 1321 is provided in the second connection line 1320 to control the flow of the pressurized medium between the second master chamber 1112a and the third and fourth wheel cylinders 23 and 24.

The second cut valve 1321 may be provided as a solenoid valve of a normal open type that operates to close when a closing signal is received from the electronic control unit after being opened normally. Accordingly, when the second cut valve 1321 is closed, the pressurized medium in the second master chamber 1121a is prevented from being transferred to the second hydraulic circuit 1240 and at the same time, the simulation flow path of the simulation device 1250 ( It may be completely supplied to the 1251, it is possible to prevent the hydraulic pressure provided from the hydraulic pressure supply device 1210 from being transferred to the master cylinder 1110 side. In addition, when the second cut valve 1321 is opened, the pressurized medium in the second master chamber 1112a passes through the second connection line 1320 to the third and fourth wheel cylinders 23 of the second hydraulic circuit 1240. , 24) to implement braking. At this time, since the third and fourth inlet valves 1241a and 1241b are open when they are not operated, there is no need to change the operating state.

The third connection line 1330 may be provided at one end communicating with the main reservoir 1120 and the other end communicating with the sub reservoir 1280. When the third connection line 1330 has an excessively large or small amount of the pressurized medium in one reservoir, the pressurized medium can be transferred between the reservoirs to facilitate smooth supply of the pressurized medium to each component element.

The first connection line 1310 and the second connection line 1320 may be provided with a pipe having a predetermined strength, and the third connection line 1330 may be provided with a hose having elasticity. The first connection line 1310 and the second connection line 1320 are each delivered from the first master chamber 1111a and the second master chamber 1112a to which a pressurized medium is formed, and has a strength capable of withstanding the hydraulic pressure. It is provided with a pipe to promote the durability and performance of the product. On the other hand, the third connection line 1330 is provided by being connected to the main reservoir 1120 and the sub reservoir 1280 having an internal pressure of atmospheric pressure. ) And the second block 1200 may be made of a material having elasticity that can be flexibly installed. The first connection line 1310 and the second connection line 1320 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 an accident of the vehicle.

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

2 is a hydraulic circuit diagram showing a state in which the electronic brake system 1000 according to the present embodiment performs a normal operation mode. Referring to FIG. 2, when the driver presses the brake pedal 10 for braking of the vehicle during normal operation of the electronic brake system according to the present embodiment, the pedal displacement sensor 11 changes the displacement of the brake pedal 10 or The amount of foot pressure is sensed, and the hydraulic pressure supply device 1210 forms a corresponding hydraulic pressure of the pressurized medium based on this. The hydraulic pressure of the pressurized medium is formed in the first pressure chamber 1213 or the second pressure chamber 1214 by the forward or backward movement of the hydraulic pressure supply device 1210, specifically the hydraulic piston 1212, and the hydraulic pressure of the pressurized medium is After being adjusted and controlled through the hydraulic control unit 1220, it is provided as first to fourth wheel cylinders 21, 22, 23, and 24 to implement vehicle braking.

At this time, the first cut valve 1311 and the second cut valve 1321 are switched to a closed state to prevent the hydraulic pressure provided from the hydraulic pressure supply device 1210 from leaking to the master cylinder 1110, Conversely, it is possible to prevent the pressurized medium from being transferred from the master cylinder 1110 to the first and second hydraulic circuits 1230 and 1240.

On the other hand, when the driver operates on the brake pedal 10, the first master piston 1111 also advances and displacement occurs, but as the first cut valve 1311 switches to the closed state, the first master chamber 1111a is closed. As a result, the inner pressurized medium is not discharged, and the second master piston 1112 is advanced to generate displacement. By advancing the second master piston 1112, the pressurized medium inside the second master chamber 1112a is pressurized, and the pressurized medium inside the second master chamber 1112a is a simulation device along the second connection line 1320. It is transmitted to the (1250) side. At this time, since the inspection valve 1271 is maintained in an open state, the pressurized medium can be smoothly supplied from the second master chamber 1112a to the simulation apparatus 1250.

During normal operation, the simulator valve 1253 of the simulation apparatus 1250 is opened, so that the pressurized medium discharged from the second master chamber 1112a may be supplied to the simulation flow path 1251. The pressurized medium supplied through the simulation flow path 1251 generates displacement in the simulation piston 1252a of the pedal simulator 1252 to compress the simulation spring 1252c, and an elastic restoring force generated by compression of the simulation spring 1252c. This driver can be provided with a pedal feel. The pressurized medium accommodated in the simulation chamber 1252b of the pedal simulator 1252 is discharged to the sub reservoir 1280 through the second sub reservoir flow path 1292.

Hereinafter, a state in which the electronic brake system 1000 according to the present embodiment does not operate normally will be described.

3 is a hydraulic circuit diagram showing a state in which the electronic brake system according to the present embodiment performs an abnormal operation mode (fallback mode). Referring to FIG. 3, when the electronic control unit determines that the normal operation mode of the brake system is not possible through the pressure sensor PS or the like, each valve of the electronic unit is controlled to an initial operation state. Thereafter, when the driver applies a pedal effort to the brake pedal 10, the first master piston 1111 connected to the brake pedal 10 advances, and accordingly, hydraulic pressure is generated in the pressurized medium accommodated in the first master chamber 1111a. . The pressurized medium pressurized in the first master chamber 1111a may be transferred to the first and second wheel cylinders 21 and 22 along the first connection line 1310 to implement braking. Meanwhile, the second master piston 1112 is also advanced by the advance of the first master piston 1111 or the pressurized medium pressurized in the first master chamber 1111a, and accordingly, pressurization accommodated in the second master chamber 1112a The medium can also build up hydraulic pressure. The pressurized medium of the second master chamber 1112a may be delivered to the third and fourth wheel cylinders 23 and 24 along the second connection line to implement braking.

At this time, the first cut valve 1311 and the second cut valve 1321, the inspection valve 1271, and the first to fourth inlets respectively provided in the first connection line 1310 and the second connection line 1320 The valves 1231a, 1231b, 1241a, and 1241b are provided as a normal open type solenoid valve, and the simulator valve 1253 and the first to fourth outlet valves 1232a, 1232b, 1242a, and 1242b are normal. As provided by a normally closed type solenoid valve, the hydraulic pressure of the pressurized medium formed in the first and second master chambers 1111a and 1112b of the master cylinder 1110 is directly transmitted to the four wheel cylinders 20 As a result, braking stability can be improved and quick braking can be achieved.

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

In the test mode, it is possible to diagnose and determine whether the simulator valve 1253 leaks. The electronic brake system according to the present exemplary embodiment may periodically or frequently inspect the device for abnormality by executing the inspection mode before the driver starts driving the vehicle or while the vehicle is stopped.

As described above, when the electronic brake system 1000 operates in an abnormal operation mode (fallback mode), each valve is controlled to a non-operating state of the braking initial state, and the first connection line 1310 and the second connection line ( The first cut valve 1311 and the second cut valve 1321 and the first to fourth inlet valves 1231a, 1231b, 1241a, and 1241b respectively provided in 1320 are opened to the pressurizing medium of the master cylinder 1110 The hydraulic pressure can be transferred directly to the wheel cylinders 21, 22, 23, 24.

At this time, the simulator valve 1253 is maintained in a closed state so that the hydraulic pressure of the pressurized medium delivered to the third and fourth wheel cylinders 23 and 24 along the second connection line 1320 leaks to the simulation device 1250. Prevent it from becoming. Accordingly, the hydraulic pressure discharged from the master cylinder 1110 is transmitted to the wheel cylinder 20 without loss by applying a pedal effort to the brake pedal 10 by the driver, thereby controlling to secure stable braking.

However, if there is a leak in the simulator valve 1253, there is a concern that a part of the hydraulic pressure of the pressurized medium discharged from the master cylinder 1110 may be lost to the simulation device 1250 through the simulator valve 1253, as a result. The driver's intended braking force may not be generated, and thus a problem may occur in the braking stability of the vehicle.

4 is a hydraulic circuit diagram showing a state in which an inspection mode for determining whether a simulator valve is leaked according to the present embodiment is performed. Referring to FIG. 4, each valve of the electronic unit is controlled to an initial operation state in the inspection mode. In the state, the electronic control unit switches the inspection valve 1271 to a closed state to prevent the hydraulic pressure provided from the hydraulic pressure supply device 1210 from being lost to the master cylinder 1110 and the main reservoir 1120. In addition, the second cut valve 1321 is closed to block the flow of the pressurized medium through the second connection line 1320, and the first to fourth outlet valves 1232a, 1232b, 1242a, 1242b are normally closed type. It is provided with a (Normal Closed Type) solenoid valve and maintains the closed state. The first to fourth inlet valves 1231a, 1231b, 1241a, and 1241b may be selectively switched to a closed state as needed.

Thereafter, the electronic control unit operates the hydraulic pressure supply device 1210 to generate the hydraulic pressure of the pressurized medium, and compares and analyzes the pressure values measured and sensed by the pressure sensor (PS) to determine whether the simulator valve 1253 is leaking. I can. Specifically, the hydraulic pressure value of the pressurized medium that is expected to occur according to the displacement amount of the hydraulic piston 1212 of the hydraulic pressure supply device 1210 or the operation amount of the motor (not shown) and the actual hydraulic pressure of the pressurized medium measured by the pressure sensor PS In contrast to the numerical values, when the two hydraulic pressure values coincide, it may be determined that there is no leakage of the simulator valve 1253. On the contrary, if the actual hydraulic pressure value of the pressurized medium measured by the pressure sensor (PS) is lower than the hydraulic pressure value of the pressurized medium expected to occur according to the displacement amount of the hydraulic piston 1212 or the operation amount of the motor (not shown), the hydraulic pressure is supplied. Since a part of the hydraulic pressure provided from the device 1210 is lost, it is determined that there is a leak in the simulator valve 1253, and this may be notified to the driver.

The electronic brake system 1000 according to the present embodiment is physically spaced apart from the first block 1100 in which the mechanically operating mechanism unit is disposed and the second block 1200 in which the electronic unit operated and controlled electronically is disposed. As it is possible to mount the vehicle in a state where it is installed, the mounting property of the vehicle is improved and the degree of freedom in designing the vehicle is increased. In addition, since the same electronic brake system 1000 can be applied regardless of whether a vehicle is left-hand drive (LHD) or right-hand drive (RHD), vehicle development can be facilitated and product productivity can be improved. In addition, the first block 1100 of the mechanism unit interlocked with the brake pedal 10 is installed close to the passenger seat of the vehicle, and the second block 1200 of the electronic unit for forming and adjusting hydraulic pressure while being operated and controlled electronically is installed in the vehicle. Since it can be mounted at a position separated from the passenger seat of the pressurized medium, noise generated in the process of generating and controlling the hydraulic pressure of the pressurized medium can be suppressed from flowing into the passenger seat, as well as the first block 1100 and the second block ( 1200) in the event of a failure, the cost of maintenance and repair can be reduced, thereby enhancing the competitiveness of the product.

1000: electronic brake system
1100: first block 1110: master cylinder
1111: first master piston 1111a: first master chamber
1112: second master piston 1112a: second master chamber
1120: main reservoir 1200: second block
1210: hydraulic pressure supply device 1212: hydraulic piston
1213: first pressure chamber 1214: second pressure chamber
1220: hydraulic control unit 1230: first hydraulic circuit
1240: second hydraulic circuit 1250: simulation device
1251: Simulation Euro 1252: Pedal Simulator
1252a: simulation piston 1252b: simulation chamber
1252c: simulation spring 1253: simulator valve
1260: dump control unit 1270: inspection unit
1271: inspection valve 1280: sub reservoir
1300: connection line 1310: first connection line
1320: second connection line 1330: third connection line

Claims (17)

A first block interlocking with the brake pedal to arrange a mechanical unit that is operated mechanically;
A second block in which an electronic unit electronically operated and controlled by the electronic control unit is disposed, and is spaced apart from the first block; And
Includes; a connection line hydraulically connecting the first block and the second block,
The mechanism part
A main reservoir in which the pressurized medium is stored,
A first master piston connected to the brake pedal, a first master chamber whose volume is changed by displacement of the first master piston, and a second master piston provided to be displaceable by the hydraulic pressure of the first master chamber, And a master cylinder having a second master chamber whose volume is varied by the displacement of the second master piston,
The electronic part
A sub reservoir in which the pressurized medium is stored,
A hydraulic pressure supply device for generating hydraulic pressure by operating a hydraulic piston according to an electrical signal output in response to the displacement of the brake pedal;
A plurality of flow paths having a first hydraulic circuit having two wheel cylinders and a second hydraulic circuit having two other wheel cylinders, and controlling hydraulic pressure transmitted to the first hydraulic circuit and the second hydraulic circuit And a hydraulic control unit having a valve and,
And the electronic control unit,
The connecting line is
A first connection line connecting the first master chamber to the first hydraulic circuit,
A second connection line connecting the second master chamber to the second hydraulic circuit,
An electronic brake system comprising a third connection line connecting the main reservoir and the sub reservoir. The method of claim 1,
The electronic part
A simulation flow path branched from the second connection line and connected to the sub reservoir,
A pedal simulator provided in the simulation flow path,
Electronic brake system further comprising a simulator valve provided in the simulation flow path to control the flow of the pressurized medium. The method of claim 2,
The electronic part
The electronic brake system further comprises an inspection valve provided on the second connection line between a point at which the second master chamber and the simulation flow path diverge, and for controlling the flow of the pressurized medium. The method of claim 3,
The electronic part
A first cut valve provided on the first connection line to control the flow of the pressurized medium,
The electronic brake system further comprises a second cut valve provided between the second hydraulic circuit and the point at which the simulation flow path diverges on the second connection line, and controls the flow of the pressurized medium. The method of claim 4,
The electronic part
A first sub reservoir flow path connecting the first hydraulic circuit and the sub reservoir,
Electronic brake system further comprising a second sub reservoir flow path connecting the second hydraulic circuit and the sub reservoir. The method of claim 5,
The electronic part
An electronic brake system further comprising a dump control unit provided between the hydraulic pressure supply device and the sub reservoir and including a plurality of flow paths and valves to control the flow of the pressurized medium. The method of claim 6,
The electronic part
Electronic brake system further comprising a third sub reservoir flow path connecting the dump control unit and the sub reservoir. The method of claim 7,
The first hydraulic circuit is
A first inlet valve and a second inlet valve for controlling the flow of the pressurized medium supplied from the hydraulic pressure supply device to the first wheel cylinder and the second wheel cylinder, respectively, and discharged from the first wheel cylinder and the second wheel cylinder. The pressurizing medium includes a first outlet valve and a second outlet valve supplied to the first sub-reservoir flow path and controlling the same,
The second hydraulic circuit is
A third inlet valve and a fourth inlet valve for controlling the flow of the pressurized medium supplied from the hydraulic pressure supply device to the third wheel cylinder and the fourth wheel cylinder, respectively, and discharged from the third wheel cylinder and the fourth wheel cylinder. The pressurized medium is supplied to the second sub-reservoir flow path, and an electronic brake system including a third outlet valve and a fourth outlet valve controlling the same. The method of claim 8,
The simulation flow path is
An electronic brake system joined to the second sub reservoir flow path and connected to the sub reservoir. The method of claim 9,
The sub reservoir is
A first sub-chamber partitioned on one side, a second sub-chamber partitioned on the other side, and a third sub-chamber partitioned on a central side,
The first sub-reservoir flow path communicates with the first sub-chamber,
The second sub-reservoir flow path communicates with the second sub-chamber,
The third sub-reservoir flow path is an electronic brake system that communicates with the third sub-chamber. The method of claim 4,
The mechanism part
A first main reservoir flow path connecting the main reservoir and the first master chamber,
Electronic brake system further comprising a second main reservoir flow path connecting the main reservoir and the second master chamber. The method of claim 11,
The main reservoir is
A first main chamber partitioned on one side, a second main chamber partitioned on the other side, and a third main chamber partitioned on a central side,
The first main reservoir flow path communicates with the first main chamber,
The second main reservoir flow path communicates with the second main chamber,
The third connection line is an electronic brake system in communication with the third main chamber. The method of claim 1,
The first connection line and the second connection line are provided with a rigid pipe,
The third connection line is an electronic brake system provided with a hose having elasticity. The method of claim 2,
The electronic part
A first bypass flow path connected in parallel to the simulator valve on the simulation flow path, and a simulator check valve that is provided in the first bypass flow path and allows only the flow of braking fluid from the pedal simulator to the second connection line. Electronic brake system further comprising. The method of claim 3,
The electronic part
A second bypass flow path provided in parallel with respect to the inspection valve on the second connection line, and a second bypass flow path provided in the second bypass flow path to allow only the flow of a braking fluid directed from the second master chamber to the second hydraulic circuit. Electronic brake system further comprising an inspection check valve. The method of claim 15,
The electronic part
Electronic brake system further comprising a pressure sensor for measuring the hydraulic pressure of the pressurized medium provided from the hydraulic pressure supply device. The method of claim 14,
The pedal simulator
A simulation piston provided to be displaceable by the hydraulic pressure of the pressurized medium supplied from the second connection line, a simulation chamber whose volume is changed by the displacement of the simulation piston, and a simulation spring elastically supporting the simulation piston Electronic brake system.

Images