Hydraulic unit of brake system

Abstract

A hydraulic unit of a brake system includes: a hydraulic block including: a cylinder bore in which a master cylinder connected to a brake pedal is disposed; a motor hole provided with a motor operated by an electric signal output in response to displacement of the brake pedal to generate hydraulic pressure; a hydraulic flow path; and a valve hole in which a valve is provided that controls the flow of the pressurized medium through the hydraulic flow passage; and an electronic control unit controlling operation of the motor and the valve based on displacement information of the brake pedal, the motor hole being provided on a first surface of the hydraulic block, a housing of the electronic control unit being provided on a second surface of the hydraulic block, which is an opposite side surface of the first surface, the electronic control unit including a first circuit board and a second circuit board, a first connector that supplies power or transmits an electric signal to the first circuit board is located on an upper side of a third surface that forms an upper side surface between the first surface and the second surface, and a second connector that supplies power or transmits an electric signal to the second circuit board is located on a front side of a fourth surface that forms a front side surface between the first surface and the second surface.

Description

Technical Field

[0001] The present invention relates to a hydraulic unit of a brake system, and more particularly to a hydraulic unit of a brake system that generates a braking force by using an electrical signal in response to a displacement of a brake pedal. Background Art

[0002] In a vehicle, a brake system for performing braking must be installed, and various types of brake systems have been proposed for the safety of a driver and passengers.

[0003] Conventional brake systems mainly use a method in which when the driver steps on the brake pedal, a mechanically connected booster is used to supply the hydraulic pressure required for braking to the wheel cylinder. However, as the market demand for realizing various braking functions by specifically responding to the vehicle operating environment increases, in recent years, electronic brake systems have become widely popular. The electronic brake system receives the driver's braking intention in the form of an electrical signal from a pedal displacement sensor for sensing the displacement of the brake pedal when the driver steps on the brake pedal, and operates a hydraulic supply device based on the electrical signal to supply the hydraulic pressure required for braking to the wheel cylinder.

[0004] Such an electronic brake system generates and provides the driver's brake pedal operation in the normal operation mode or the braking judgment during the automatic driving of the vehicle in the form of an electrical signal, and electrically operates and controls the hydraulic supply device based on the electrical signal, thereby forming the hydraulic pressure required for braking and transmitting the hydraulic pressure to the wheel cylinder. As described above, since the electronic brake system and the operation method thereof are electrically operated and controlled, complex and various braking operations can be achieved, but when technical problems occur in the electrical components, the hydraulic pressure required for braking cannot be stably formed, which may threaten the safety of the occupants.

[0005] Therefore, when a component fails or is out of control, the electronic brake system enters an abnormal operation mode, and at this time, a mechanism is required to directly link the driver's brake pedal operation with the wheel cylinder. That is, in the abnormal operation mode of the electronic brake system, when the driver applies a stepping force on the brake pedal, it is necessary to immediately generate the hydraulic pressure required for braking and transmit it directly to the wheel cylinder.

[0006] On the other hand, in recent years, autonomous driving or highway driving assistance functions have been installed on vehicles to increase the convenience of drivers. In order to perform such convenience functions, additional components for providing and transmitting electrical signals are added to the brake system installed in the vehicle, resulting in an increase in the size of the hydraulic block or the brake system. Therefore, when installing the hydraulic block or the brake system on the vehicle, the size and installation position are restricted, which may cause interference with surrounding components or hinder the freedom of vehicle design. Therefore, a solution is needed that can maintain the vehicle braking performance while effectively installing the brake system. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] An object of the present embodiment is to provide a hydraulic unit of a brake system that can be easily installed and disposed on a vehicle.

[0009] An object of the present embodiment is to provide a hydraulic unit of a brake system that can perform various functions while being provided in a compact size.

[0010] An object of the present embodiment is to provide a hydraulic unit for a brake system that can improve the degree of freedom in vehicle design and space utilization.

[0011] An object of the present embodiment is to provide a hydraulic unit of a brake system that can achieve durability and operational stability of the device by preventing interference with surrounding components.

[0012] An object of the present embodiment is to provide a hydraulic unit of a brake system that can stably perform braking even in various operating situations.

[0013] The purpose of the present embodiment is to provide a hydraulic unit of a brake system with improved performance and operational reliability.

[0014] (II) Technical solution

[0015] According to one aspect of the present invention, a hydraulic unit may include: a hydraulic block, including: a cylinder hole, in which a master cylinder connected to a brake pedal is provided; a motor hole, in which a motor is provided, the motor is operated by an electrical signal output in response to the displacement of the brake pedal to generate hydraulic pressure; a hydraulic channel; and a valve hole, in which a valve is provided, the valve controls the flow of a pressurized medium through the hydraulic channel; and an electronic control unit, which controls the operation of the motor and the valve based on the displacement information of the brake pedal, the motor hole may be provided on a first surface of the hydraulic block, the housing of the electronic control unit may be provided on a second surface of the hydraulic block, i.e., on an opposite side of the first surface, the electronic control unit may include a first circuit board and a second circuit board, the first connector for supplying power or transmitting electrical signals to the first circuit board may be located on the upper side of a third surface forming an upper side surface between the first surface and the second surface, and the second connector for supplying power or transmitting electrical signals to the second circuit board may be located on the front side of a fourth surface forming a front side surface between the first surface and the second surface.

[0016] The hydraulic unit may further include a reservoir for accommodating a pressurized medium, and the hydraulic block may further include a reservoir hole communicating with the reservoir, and the reservoir hole may be disposed on the fourth surface of the hydraulic block.

[0017] The second connector may be located between the front end of the reservoir and the fourth face.

[0018] The first connector may be located between an upper end of the reservoir and the third surface.

[0019] The second connector may be provided so that a power supply portion or a signal transfer portion enters and is coupled in a direction corresponding to a thickness direction between the first face and the second face.

[0020] The first connector may be disposed such that a power supply portion or a signal transfer portion enters and is coupled in a direction corresponding to a thickness direction between the first face and the second face.

[0021] The liquid reservoir may include a plurality of chambers partitioned by a plurality of partitions, and a plurality of the liquid reservoir holes may be provided, and the plurality of the liquid reservoir holes are respectively communicated with the plurality of chambers.

[0022] The plurality of reservoir holes may be arranged in a direction corresponding to a thickness direction of the fourth surface.

[0023] The hydraulic block may further include a protruding portion formed to protrude on the first surface, so that a thickness of the fourth surface is greater than a thickness between the first surface and the second surface.

[0024] The reservoir may be disposed on the hydraulic block at a position relatively higher than the second connector.

[0025] The front end portion of the housing may be located at a rear side of the front end portion of the reservoir.

[0026] An upper end portion of the housing may be located below an upper end portion of the reservoir.

[0027] The cylinder hole may be provided on a fifth surface that forms a rear side surface between the first surface and the second surface of the hydraulic block, ie, an opposite side surface of the fourth surface.

[0028] The cylinder hole may be formed to extend in a front-rear direction.

[0029] The hydraulic block may further include a plurality of wheel ports, a plurality of wheel cylinders are respectively connected to the plurality of wheel ports, and the wheel ports may be disposed on the first surface of the hydraulic block.

[0030] The second connector may have a long width and a short width, and the long width of the second connector may be arranged in an up-and-down direction on the housing.

[0031] The first connector may have a long width and a short width, and the long width of the first connector may be arranged along a front-rear direction on the housing.

[0032] The hydraulic unit may include: a hydraulic block, including: a cylinder hole, in which a master cylinder connected to a brake pedal is provided; a motor hole, in which a motor is provided, the motor being operated by outputting an electrical signal in response to the displacement of the brake pedal to generate hydraulic pressure; an electronic control unit, which controls the operation of the motor and the valve based on the displacement information of the brake pedal; and a reservoir, which contains a pressurized medium, the electronic control unit may include a first circuit board and a second circuit board, a first connector for supplying power or transmitting an electrical signal to the first circuit board may be located on the upper side of the hydraulic block, a second connector for supplying power or transmitting an electrical signal to the second circuit board may be located on the front side of the hydraulic block, and the second connector may be located between the front side end of the reservoir and the front side surface of the hydraulic block.

[0033] The reservoir may be disposed on the hydraulic block at a position relatively higher than the second connector.

[0034] The second connector may have a long width and a short width, and the long width of the second connector may be arranged in an up-and-down direction on the housing.

[0035] A brake system including the hydraulic unit may be provided.

[0036] (III) Beneficial effects

[0037] The hydraulic unit of the brake system according to the present embodiment can be easily installed and arranged on a vehicle.

[0038] The hydraulic unit of the brake system according to the present embodiment can be provided in a compact size while performing various functions.

[0039] The hydraulic unit of the brake system according to the present embodiment can improve the design freedom and space utilization of the vehicle.

[0040] The hydraulic unit of the brake system according to the present embodiment can achieve durability and operational stability of the device by preventing interference with surrounding components.

[0041] The hydraulic unit of the brake system according to the present embodiment can stably perform braking in various operating conditions.

[0042] The hydraulic unit of the brake system according to the present embodiment can improve performance and operational reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a perspective view showing a hydraulic unit according to the present embodiment.

[0044] Figure 2 is a side view showing a hydraulic unit according to the present embodiment.

[0045] Figure 3 is a plan view showing a hydraulic unit according to the present embodiment.

[0046] Figure 4 2 is a side view (front side view) showing another direction of the hydraulic unit according to the present embodiment.

[0047] Figure 5 is a perspective view showing a hydraulic block according to the present embodiment.

[0048] Description of reference numerals:

[0049] 1: Hydraulic unit 100: Hydraulic block

[0050] 101: First side 102: Second side

[0051] 103: The third side 104: The fourth side

[0052] 105: fifth surface 110: raised portion

[0053] 111: Motor hole 112: Reservoir hole

[0054] 115: Wheel port 200: Electronic control unit

[0055] 210: first connector 220: second connector

[0056] 230: Housing 300: Motor

[0057] 400: Liquid reservoir 420: Fastening portion

[0058] 500: Master cylinder DETAILED DESCRIPTION

[0059] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are provided to fully convey the concept of the present invention to those skilled in the art. The present invention is not limited to the embodiments provided herein, but may be embodied in other forms. In the accompanying drawings, in order to illustrate the present invention, parts not related to the description may be omitted, and the size of the components may be exaggerated for ease of understanding.

[0060] Figure 1 and Figure 2 1 and 2 are respectively a perspective view and a side view showing the hydraulic unit 1 according to the present embodiment. Figure 3 is a plan view showing a hydraulic unit 1 according to the present embodiment, Figure 4 1 is a side view (front side view) showing the hydraulic unit 1 according to the present embodiment from another direction.

[0061] Reference Figures 1 to 4 The hydraulic unit 1 according to the present embodiment may include: a master cylinder 500 connected to a brake pedal (not shown); a hydraulic block 100 provided with a plurality of hydraulic channels (not shown) and a plurality of bores; an electronic control unit 200 controlling operations of a motor 300 and a valve installed in the hydraulic block 100; and a reservoir 400 containing a pressurized medium.

[0062] The hydraulic block 100 may be configured in a hexahedral shape, with a plurality of hydraulic channels forming a moving path of the pressurized medium disposed inside thereof, and a plurality of holes for mounting various components such as the master cylinder 500 and the motor 300 disposed outside thereof. Specifically, the hydraulic block 100 includes: a cylinder hole, in which the master cylinder 500 is disposed, the master cylinder 500 being connected to the brake pedal and operating according to the operation of the brake pedal; a motor hole 111, in which a motor is disposed, the motor being operated by outputting an electrical signal in response to the displacement of the brake pedal to form the hydraulic pressure of the pressurized medium required for braking; a valve hole, in which a plurality of valves are disposed, the plurality of valves controlling the flow of the pressurized medium through the hydraulic channel; a reservoir hole 112, in communication with a reservoir 400 containing the pressurized medium; and a wheel port 115, to which a plurality of wheel cylinders are respectively connected.

[0063] In the following description, "upper side", "lower side", "front side" and "rear side" refer to Figure 2 The upper, lower, left and right sides, thickness direction and length direction refer to Figure 3 These terms are intended to help understand the present invention and should not be limited to specific directions or specific parts, but should be understood as relative concepts used to clearly set positions and directions.

[0064] The motor hole 111 can be disposed on the first surface 101 of the hydraulic block 100, which has a relatively large area, and the housing 230 of the electronic control unit 200 can be disposed on the second surface 102 of the hydraulic block 100, which has a relatively large area, i.e., on the opposite side of the first surface 101. Valve holes for arranging a plurality of valves can also be disposed on the second surface 102, so as to be electrically connected to the electronic control unit 200 mounted on the second surface 102.

[0065] The motor hole 111 and the valve hole may be recessed and extended on the hydraulic block 100 in a direction parallel to the thickness direction between the first face 101 and the second face 102. A hydraulic piston (not shown) operated by the motor 300 may be inserted into the motor hole 111 and reciprocate, and the valve hole is also recessed on the second face 102 in the same axial direction as the motor hole 111, and various solenoid valves and check valves for controlling the flow of the pressurized medium delivered along the hydraulic flow passage may be inserted and installed in the valve control.

[0066] The bulge 110 for increasing the thickness of the fourth surface 104 of the hydraulic block 100, i.e., the front side surface of the hydraulic block 100, may be bulged and protruded on the first surface 101 to stably arrange a plurality of reservoir holes 112 on the fourth surface 104 to be described later. Figure 5 Describe it in detail.

[0067] Figure 5 is a perspective view showing a hydraulic block 100 according to the present embodiment, referring to Figures 1 to 5 The reservoir hole 112 may be formed at the fourth face 104 forming the front side between the first face 101 and the second face 102 of the hydraulic block 100 .

[0068] The inner side of the reservoir 400 may contain a pressurized medium, and the reservoir 400 may extend in the up-down direction to minimize the space occupied by the hydraulic unit 1. The chamber containing the pressurized medium in the inner side of the reservoir 400 may be connected to the master cylinder 500 or the hydraulic piston (not shown) side through the reservoir hole 112 formed in the hydraulic block 100. The reservoir hole 112 may be formed in the fourth face 104 forming the front side between the first face 101 and the second face 102 of the hydraulic block 100. When the reservoir hole 112 is provided on the upper side of the hydraulic block 100, the size of the product in the up-down direction may be enlarged because the reservoir 400 is provided on the upper side of the hydraulic block 100. Therefore, in the hydraulic block 100 according to the present embodiment, the reservoir hole 112 communicating with the reservoir 400 may be provided on the fourth face 104, i.e., the front side instead of the upper side, so that the size and volume of the hydraulic unit 1 in the up-down direction may be suppressed.

[0069] The interior of the reservoir 400 may be divided into a plurality of chambers by a partition. As an example, the chambers of the reservoir 400 may include: a first chamber and a second chamber, which are respectively connected to a plurality of main chambers provided in the master cylinder 500; and a third chamber, which is connected to a pressure chamber operated by a hydraulic piston. In this case, a plurality of reservoir holes 112 may be provided so that the pressurized medium flows smoothly between the first chamber to the third chamber of the reservoir 400 and the main chambers and the pressure chambers provided in the hydraulic block 100. Specifically, the reservoir hole 112 may include a first reservoir hole 112 communicating with the first chamber, a second reservoir hole 112 communicating with the second chamber, and a third reservoir hole 112 communicating with the third chamber, so that each chamber separated in the reservoir 400 is communicated with the hydraulic block 100 side.

[0070] At this time, the larger the diameter of the reservoir hole 112, the smoother the flow of the pressurized medium. However, as the diameter of the reservoir hole 112 increases, the thickness of the hydraulic block 100 also increases, so the size of the hydraulic unit 1 also increases, which may interfere with surrounding components, thereby reducing the vehicle applicability and body space utilization. On the contrary, if the diameter of the reservoir hole 112 is reduced in order to suppress the increase in the size of the hydraulic device 1, the flow of the pressure medium may not be smooth, and if the reservoir hole 112 is arranged in the up-down direction or the length direction on the hydraulic block 100, it will affect the arrangement of other components such as the electronic control unit 200, resulting in an increase in the overall size and volume of the hydraulic unit 1.

[0071] Therefore, the hydraulic block 100 according to the present embodiment includes the ridge 110 to expand the diameter of the reservoir hole 112 to a level that can achieve smooth flow of the pressurized medium while suppressing the size increase of the hydraulic unit 1 and minimizing the impact on the configuration of surrounding components such as the electronic control unit 200.

[0072] The raised portion 110 may be formed on the first surface 101 of the hydraulic block 100 by raising and protruding a portion of the first surface 101, thereby expanding the thickness or area of ​​the fourth surface 104. Specifically, the raised portion 110 may be provided integrally with the hydraulic block 100, and a portion of the front portion of the first surface 101 may be raised and protruded to expand the thickness or area of ​​the fourth surface 104. Since only a portion of the first surface 101 in contact with the fourth surface 104 other than the portion where the motor 300 is mounted protrudes to form the raised portion 110, the thickness or area of ​​the fourth surface 104 is expanded while suppressing an increase in the weight of the hydraulic block 100, so that the plurality of reservoir holes 112 may be arranged in a direction corresponding to the thickness direction of the hydraulic block 100. Reference Figure 5 The height of the upper end or lower end of any one of the plurality of reservoir holes 112 (the length from the bottom surface of the hydraulic block to the upper end or lower end of any one of the reservoir holes) can be located between the upper end and the lower end of another reservoir hole 112 (the interval between the height from the bottom surface of the hydraulic block to the upper end of another reservoir hole and the height from the bottom surface of the hydraulic block to the lower end of another reservoir hole), thereby suppressing the increase in the length of the hydraulic block 100 in the vertical direction and achieving miniaturization of the product. On the other hand, a plurality of wheel ports 115 can be provided on the first surface 101 or on the surface of the raised portion 110 parallel to the first surface 101, and the hydraulic flow path of the hydraulic block 100 is connected to the plurality of wheel cylinders respectively through the plurality of wheel ports 115.

[0073] Since the plurality of reservoir holes 112 are disposed at a position relatively higher than the second connector 220 of the electronic control unit 200 to be described later, further miniaturization of product size and volume can be achieved, which will be described in detail below.

[0074] The reservoir 400 may include at least one fastening portion 420, which protrudes and extends to be stably coupled to the hydraulic block 100, and the fastening portion 420 may be fastened to at least one of the third surface 103 and the fourth surface 104 forming the upper side surface between the first surface 101 and the second surface 102 of the hydraulic block 100 by fastening members such as bolts.

[0075] The electronic control unit 200 is configured to control operations of the motor 300 and the valve based on displacement information of the brake pedal or information detected by various sensors (not shown).

[0076] On the other hand, in recent years, in order to enable the brake system to brake the vehicle stably even when the electronic control unit fails and cannot operate, a redundant structure is being developed in which two circuit boards are set in the electronic control unit and a separate connector is set on each circuit board. The electronic control unit with such a redundant structure can normally control the operation of the brake system even if one circuit board fails, so the reliability of the brake operation can be improved. However, since it is necessary to set not only multiple circuit boards but also multiple connectors connected to each circuit board, there is a problem of rapid increase in the size and volume of the hydraulic unit. In this case, due to the high possibility of interference with surrounding components, the durability and operating stability of the components may be reduced. In addition, since it is difficult to set and apply the hydraulic block or the brake system on the vehicle body, there is a problem of reduced design freedom and space utilization of the vehicle.

[0077] Therefore, in order to suppress the expansion of the size and volume of the hydraulic unit 1, in the electronic control unit 200 according to the present embodiment, a plurality of connectors 210, 220 may be arranged in the space between the outer surface of the hydraulic block 100 and the outer ends 400a, 400b of the reservoir 400, and at the same time, the plurality of connectors 210, 220 may be arranged adjacent to different surfaces of the hydraulic block 100.

[0078] The electronic control unit 200 may include: a first circuit board (not shown), which is disposed on the second surface 102 of the hydraulic block 100, i.e., the opposite side of the first surface 101 where the motor 300 is disposed, and is connected to the valve installed in the valve hole, and receives power from the first power supply unit (not shown) or receives an electric signal through the first signal transmission unit (not shown); and a second circuit board (not shown), which is disposed on the second surface 102 of the hydraulic block 100, i.e., the opposite side of the first surface 101 where the motor 300 is disposed, and is connected to the valve installed in the valve hole, and receives power from the second power supply unit (not shown) or receives an electric signal through the second signal transmission unit (not shown). In addition, the electronic control unit 200 may include: a first connector 210, which supplies power to the first circuit board or transmits an electric signal; a second connector 220, which supplies power to the second circuit board or transmits an electric signal; and a housing 230, which accommodates the first circuit board and the second circuit board inside, and the first connector 210 and the second connector 220 are disposed on the outer surface of the housing 230.

[0079] The first power supply unit and the second power supply unit can supply power to the first circuit board and the second circuit board from a vehicle battery (not shown) or the like, and the first power supply unit and the second power supply unit can independently supply and transmit power. That is, even if the first power supply unit fails or is unable to operate, the second power supply unit can operate normally and supply power to the second circuit board through the second connector 220. Similarly, the first signal transmission unit and the second signal transmission unit can transmit electrical signals independently of each other. Therefore, even if the first signal transmission unit fails or operates incorrectly, the second signal transmission unit can operate normally and transmit electrical signals to the second circuit board through the second connector 220.

[0080] Since the first circuit board and the second circuit board receive power independently from the first power supply unit and the second power supply unit, respectively, and independently transmit electric signals through the first signal transmission unit and the second signal transmission unit, respectively, the first circuit board and the second circuit board independently control the operation of the motor 300 and the valve. In other words, the first circuit board can control the operation of the motor 300 and the valve under normal operation, and the second circuit board can intervene and control the operation of the motor 300 and the valve when the first circuit board fails or cannot operate. Thus, in an emergency situation such as when one circuit board cannot operate, the other circuit board can stably control the brake system, thereby realizing a redundant structure.

[0081] The first connector 210 may be disposed on the housing 230 on the upper side of the third surface 103 that forms the upper side surface between the first surface 101 and the second surface 102 of the hydraulic block 100. At the same time, the first connector 210 may be disposed at a position between the upper end 400b of the reservoir 400 that is fastened and mounted on the hydraulic block 100 and the third surface 103 of the hydraulic block 100. In other words, the first connector 210 may be disposed in a space between the upper end 400b of the reservoir 400 that corresponds to the uppermost end of the hydraulic unit 1 and the third surface 103 of the hydraulic block 100, i.e., the upper side surface of the hydraulic block 100. At this time, when the first connector 210 is disposed as Figure 2 When the shape is formed by extending in one direction and having a long width 210a and a short width 210b as shown, the long width 210a of the first connector 210 can be set in the front-rear direction on the housing 230 to suppress the expansion of the size of the hydraulic unit 1 in the vertical direction. In addition, the upper end 230b of the housing 230 can be set at a position between the upper end 400b of the reservoir 400 and the third surface 103 of the hydraulic block 100. That is, the setting height of the upper end 230b of the housing 230 can be located between the upper end 400b of the reservoir 400 corresponding to the uppermost end of the hydraulic unit 1 and the third surface 103 of the hydraulic block 100, that is, the upper side surface of the hydraulic block 100, thereby preventing the size of the hydraulic unit 1 in the vertical direction from expanding due to the housing 230 of the electronic control unit 200 and the first connector 210.

[0082] In addition, the first connector 210 may be arranged to enter and be coupled in a direction corresponding to the thickness direction between the first surface 101 and the second surface 102 of the hydraulic block 100 to prevent interference between wiring and surrounding components, etc., connected to the first connector 210. Thus, since the wiring connected to the first connector 210 may also be arranged between the upper end of the reservoir 400 and the third surface 103 of the hydraulic block 100, interference and contact between the wiring and surrounding components may be minimized, and the size expansion of the hydraulic unit 1 in the up-down direction may be minimized.

[0083] The second connector 220 may be disposed on the housing 230 at the front side of the fourth surface 104 that forms the front side surface between the first surface 101 and the second surface 102 of the hydraulic block 100. At the same time, the second connector 220 may be disposed at a position between the front side end 400a of the reservoir 400 that is fastened and mounted on the hydraulic block 100 and the fourth surface 104 of the hydraulic block 100. In other words, the second connector 220 may be disposed in a space between the front side end 400a of the reservoir 400 that corresponds to the frontmost end of the hydraulic unit 1 and the fourth surface 104 of the hydraulic block 100, that is, the front side surface of the hydraulic block 100. At this time, when the second connector 220 is disposed as Figure 2When the second connector 220 has a shape extending in one direction and having a long width 220a and a short width 220b, the long width 220a of the second connector 220 may be set in the up-down direction on the housing 230 to suppress the expansion of the size of the hydraulic unit 1 in the front-to-back direction. In addition, the front side end 230a of the housing 230 may be set at a position between the front side end 400a of the reservoir 400 and the fourth surface 104 of the hydraulic block 100. That is, the setting position of the front side end 230a of the housing 230 may be located between the front side end 400a of the reservoir 400 corresponding to the frontmost end of the hydraulic unit 1 and the fourth surface 104 of the hydraulic block 100, that is, the front side surface of the hydraulic block 100, thereby preventing the size of the hydraulic unit 1 in the front-to-back direction from expanding due to the housing 230 and the second connector 220 of the electronic control unit 200.

[0084] In addition, the second connector 220 may be arranged to enter and be coupled in a direction corresponding to the thickness direction between the first surface 101 and the second surface 102 of the hydraulic block 100 to prevent interference between the wiring and the like connected to the second connector 210 and surrounding components. Thus, since the wiring connected to the second connector 220 may also be arranged between the front end of the reservoir 400 and the fourth surface 104 of the hydraulic block 100, interference and contact between the wiring and surrounding components may be minimized, and the size expansion of the hydraulic unit 1 in the front-rear direction may be minimized.

[0085] The second connector 220 may be disposed at a position relatively lower than the reservoir 400. Since the reservoir 400 connected to and mounted on the reservoir hole 112 disposed on the fourth face 104 of the hydraulic block 100 is disposed on a relatively high upper side, and the second connector 220 of the electronic control unit 200 is disposed on a relatively low lower side, the components disposed in the hydraulic unit 1 may be disposed more efficiently, whereby the hydraulic unit 1 may achieve a compact size and volume while performing various braking functions.

[0086] A master cylinder 500 connected to a brake pedal may be provided in the cylinder hole. The cylinder hole may be recessed and extended on the opposite side of the fifth surface 105, i.e., the fourth surface 104, which is the rear side surface between the first surface 101 and the second surface 102 of the hydraulic block 100. The cylinder hole may be formed extending along the front-to-back direction on the hydraulic block 100, and the operating axis of the master cylinder 500 may also be provided in a direction parallel to the front-to-back direction of the hydraulic block 100. Since the axis of the master cylinder 500 is provided in a direction parallel to the front-to-back direction of the hydraulic block 100, and the axis of the motor 300 is provided in a direction parallel to the thickness direction of the hydraulic block 100, the axis of the master cylinder 500 and the axis of the motor 300 may be orthogonal to each other, thereby effectively realizing the arrangement of the master cylinder 500 and the motor 300 of the hydraulic unit 1. On the other hand, reference numeral 600 denotes a mounting bracket for mounting the hydraulic block 100 on a vehicle body. The mounting bracket 600 is coupled to the fifth surface 105 of the hydraulic block 100 and is mounted and fixed on the vehicle body by a plurality of bolts 601 , so that the hydraulic block 100 can be stably fixed and supported on the vehicle body by the mounting bracket.

[0087] In the hydraulic unit 1 and the brake system including the hydraulic unit 1 according to the present embodiment, since the electronic control unit 200 includes the first circuit board and the second circuit board, when one circuit board fails, the vehicle can be braked stably and the driver can be given confidence by realizing the operation of the other circuit board, and at the same time, the setting of the first connector 210 and the second connector 220 connected to each circuit board can be effectively realized, thereby improving the installability of the vehicle. In addition, the hydraulic unit 1 and the brake system including the hydraulic unit according to the present embodiment can achieve compact size and volume while performing various functions, thereby improving the design freedom and space utilization of the vehicle.

Claims

1. A hydraulic unit, comprising: A hydraulic block, comprising: a cylinder hole, in which a master cylinder connected to a brake pedal is disposed; a motor hole, in which a motor is disposed, the motor being operated by an electrical signal output in response to displacement of the brake pedal to generate hydraulic pressure; a hydraulic flow channel; and a valve hole, in which a valve is disposed, the valve controlling the flow of a pressurized medium through the hydraulic flow channel; and an electronic control unit that controls the operation of the motor and the valve based on displacement information of the brake pedal, The motor hole is arranged on the first surface of the hydraulic block, and the housing of the electronic control unit is arranged on the second surface of the hydraulic block, that is, the side opposite to the first surface. The electronic control unit comprises a first circuit board and a second circuit board, A first connector for supplying power or transmitting an electrical signal to the first circuit board is located on an upper side of a third surface forming an upper side surface between the first surface and the second surface, A second connector for supplying power or transferring an electrical signal to the second circuit board is located on a front side of a fourth face forming a front side face between the first face and the second face.

2. The hydraulic unit according to claim 1, further comprising: A reservoir, containing the pressurized medium, The hydraulic block further includes a reservoir hole communicating with the reservoir, The reservoir hole is disposed on the fourth surface of the hydraulic block.

3. The hydraulic unit according to claim 2, wherein: The second connector is located between the front end of the reservoir and the fourth surface.

4. The hydraulic unit according to claim 2, wherein: The first connector is located between the upper end of the reservoir and the third surface.

5. The hydraulic unit according to claim 3, wherein: The second connector is provided so that a power supply portion or a signal transmission portion enters and is coupled in a direction corresponding to a thickness direction between the first face and the second face.

6. The hydraulic unit according to claim 4, wherein: The first connector is disposed so that a power supply portion or a signal transmission portion enters and is coupled in a direction corresponding to a thickness direction between the first face and the second face.

7. The hydraulic unit according to claim 2, wherein: The liquid reservoir comprises a plurality of chambers separated by a plurality of partitions, The plurality of reservoir holes are provided, and the plurality of reservoir holes are communicated with the plurality of chambers respectively.

8. The hydraulic unit according to claim 7, wherein: The plurality of reservoir holes are arranged in a direction corresponding to a thickness direction of the fourth surface.

9. The hydraulic unit according to claim 8, wherein: The hydraulic block further includes a protruding portion formed on the first surface so that a thickness of the fourth surface is greater than a thickness between the first surface and the second surface.

10. The hydraulic unit according to claim 8, wherein: The reservoir is disposed on the hydraulic block at a position relatively higher than the second connector.

11. The hydraulic unit according to claim 3, wherein: The front end of the housing is located at the rear side of the front end of the reservoir.

12. The hydraulic unit according to claim 4, wherein: The upper end portion of the housing is located below the upper end portion of the reservoir.

13. The hydraulic unit according to claim 1, wherein: The cylinder hole is provided on a fifth surface that forms a rear side surface between the first surface and the second surface of the hydraulic block, that is, on an opposite side surface of the fourth surface.

14. The hydraulic unit according to claim 13, wherein: The cylinder hole is formed to extend in the front-rear direction.

15. The hydraulic unit according to claim 1, wherein: The hydraulic block further includes a plurality of wheel ports, and the plurality of wheel cylinders are respectively connected to the plurality of wheel ports. The wheel port is disposed on the first surface of the hydraulic block.

16. The hydraulic unit according to claim 3, wherein: The second connector has a long width and a short width, The length and width of the second connector are arranged along the up-down direction on the housing.

17. The hydraulic unit according to claim 4, wherein: The first connector has a long width and a short width, The length and width of the first connector are arranged along the front-to-back direction on the housing.

18. A hydraulic unit comprising: The hydraulic block includes: a cylinder hole, in which a master cylinder connected to a brake pedal is provided; a motor hole, in which a motor is provided, the motor is operated by an electrical signal output in response to a displacement of the brake pedal to generate hydraulic pressure; an electronic control unit that controls operations of the motor and valves provided in the hydraulic block based on displacement information of the brake pedal; and A reservoir, containing the pressurized medium, The electronic control unit comprises a first circuit board and a second circuit board, A first connector for supplying power or transmitting electrical signals to the first circuit board is located on the upper side of the hydraulic block. A second connector for supplying power or transmitting electrical signals to the second circuit board is located at the front side of the hydraulic block. The second connector is located between the front end of the reservoir and the front side of the hydraulic block.

19. The hydraulic unit according to claim 18, wherein: The reservoir is disposed on the hydraulic block at a position relatively higher than the second connector.

20. The hydraulic unit according to claim 19, wherein: The second connector has a long width and a short width, The length and width of the second connector are arranged along the up-down direction on the housing.

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