ELECTRONIC HYDRAULIC BRAKE DEVICE

Abstract

Electronic hydraulic braking device which features: a main brake component (1) configured to drive a motor (129, 229) for providing hydraulic pressure to a plurality of wheel cylinders (3); and a support brake part (2) which is connected to the main brake part (1), wherein the support brake part (2) is designed such that, in response to an operational fault of the main brake part (1), it provides an auxiliary hydraulic pressure for the plurality of wheel cylinders (3), wherein the main brake part (1) comprises: a pedal cylinder (110) designed to generate hydraulic pressure in response to pressure being applied to a pedal (119); a master cylinder (120, 220) designed to sense actuation of the pedal (119) and to generate hydraulic pressure together with the motor (129, 229); a first hydraulic part (130, 230) which is connected to the main cylinder (120, 220), wherein the first hydraulic part (130, 230) is designed such that it supplies hydraulic pressure to some of the plurality of wheel cylinders (3); a second hydraulic part (140, 240) connected to the main cylinder (120, 220), wherein the second hydraulic part (140, 240) is configured to supply hydraulic pressure to a second set of the plurality of wheel cylinders (3); and a hydraulic connection (150) designed to selectively connect the first and second hydraulic parts (130, 140, 230, 240); and. wherein the support brake part (2) comprises: a support hydraulic part (10) which is connected to one of the first and second hydraulic parts (130, 140, 230, 240), wherein the support hydraulic part (10) is designed to carry hydraulic pressure; a support accumulator (20, 70) which is connected to the support hydraulic part (10) and is filled with the auxiliary hydraulic pressure; a support bypass section (30) designed to bypass the support hydraulic section (10) in order to selectively direct hydraulic pressure to the support accumulator (20, 70); and a support sensor part (40, 90) which is designed to determine the auxiliary hydraulic pressure of the support accumulator (20, 70). characterized by that the support accumulator (20, 70) is designed in such a way that it selectively absorbs the hydraulic pressure generated by the main cylinder (120, 220) in order to accumulate the hydraulic auxiliary brake pressure.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0045335, filed on April 18, 2019, which is hereby incorporated by reference into this application for all purposes. BACKGROUND SUBJECT

[0002] Embodiments relate generally to electronic hydraulic braking devices and, more particularly, to electronic hydraulic braking devices capable of rapidly providing backup braking when a main braking failure occurs in an integrated or separate braking system. DISCUSSION

[0003] Generally, an electronic hydraulic brake device is used to adjust the braking pressure of each wheel using the hydraulic pressure of a master cylinder driven by a motor after a pressure applied by a driver to the pedal is sensed by a sensor. The electronic hydraulic brake device typically includes a sensor for sensing a pedal stroke so that a driver can recognize a desired braking pressure. The electronic hydraulic brake device may further include a pedal stroke simulator that enables a driver to feel the same pedal pressure as in a conventional hydraulic brake device. Therefore, when the driver steps on the brake pedal, an electronic control unit senses the stepping action and supplies hydraulic pressure to the master cylinder. The master cylinder transmits the hydraulic braking pressure to a wheel cylinder of each wheel to provide braking force to the wheel.A known electronic hydraulic brake device may not be able to quickly provide hydraulic braking pressure to the wheel cylinder when the motor is damaged, thus causing an accident. Therefore, there is a need for a device that can solve this problem.

[0004] A known electro-hydraulic brake system is described in Korean Patent Application No. 10-2007-0104982, filed on October 30, 2007, entitled "Control Apparatus for Valve in Electro-Hydraulic Brake System." US 2017 / 0001614 A1 discloses an electronic hydraulic brake device having the features of the preamble of claim 1.

[0005] The information provided in this section above is only for understanding the background of the inventive concepts and may therefore contain information that does not constitute prior art. OVERVIEW

[0006] Some aspects provide an electronic hydraulic braking device capable of performing (e.g., rapidly performing) auxiliary braking in response to a failure in the main braking in an integrated or separate braking system.

[0007] Additional aspects are set forth in the detailed description below, and in part will be obvious from the disclosure, or may be learned by practice of the inventive concepts.

[0008] According to the invention, an electronic hydraulic brake device comprises a main brake part and a secondary brake part. The main brake part is configured to drive a motor for providing hydraulic pressure to a plurality of wheel cylinders. The secondary brake part is connected to the main brake part. The secondary brake part is configured to provide auxiliary hydraulic pressure to the plurality of wheel cylinders in response to an operational failure of the main brake part.

[0009] In a first embodiment of the invention, the main brake part comprises a pedal cylinder, a master cylinder, a first hydraulic part, a second hydraulic part, and a hydraulic port. The pedal cylinder is configured to generate hydraulic pressure in response to pressure being applied to a pedal. The master cylinder is configured to sense an operation of the pedal and generate hydraulic pressure together with the motor. The first hydraulic part is connected to the master cylinder. The first hydraulic part is configured to supply hydraulic pressure to first some of the plurality of wheel cylinders. The second hydraulic part is connected to the master cylinder. The second hydraulic part is configured to supply hydraulic pressure to second some of the plurality of wheel cylinders. The hydraulic port is configured to selectively connect the first and second hydraulic parts.

[0010] The assist brake part includes an assist hydraulic part, an assist accumulator, an assist bypass part, and an assist sensing part. The assist hydraulic part is connected to one of the first and second hydraulic parts. The assist hydraulic part is configured to conduct hydraulic pressure. The assist accumulator is connected to the assist hydraulic part and is filled with the auxiliary hydraulic pressure. The assist bypass part is configured to bypass the assist hydraulic part to selectively conduct hydraulic pressure to the assist accumulator. The assist sensing part is configured to determine the auxiliary hydraulic pressure of the assist accumulator.

[0011] According to the invention, the assist accumulator is configured to selectively receive the hydraulic pressure generated by the master cylinder to accumulate the auxiliary hydraulic brake pressure.

[0012] In one embodiment, the assist hydraulic part may include an assist hydraulic line and an assist hydraulic valve. The assist hydraulic line may have a first end connected to one of the first and second hydraulic parts and a second end connected to the assist accumulator. The assist hydraulic valve may be configured to open the assist hydraulic line in response to an operational fault of the main brake part.

[0013] In one embodiment, the assist bypass portion may include an assist bypass line and an assist bypass valve. The assist bypass line may have ends connected to the assist hydraulic line. The assist bypass line may be configured to at least partially cause the hydraulic pressure to bypass the assist hydraulic valve and move to the assist accumulator. The assist bypass valve may be configured to at least partially determine a flow direction of the auxiliary hydraulic pressure in the assist bypass line.

[0014] In one embodiment, the electronic hydraulic brake device may further include a storage portion connected to the pedal cylinder and configured to store hydraulic pressure. For this purpose, the assist brake portion may further include an assist pump connected to the storage portion. The assist pump may be configured to transfer the hydraulic pressure stored in the storage portion to the assist accumulator.

[0015] In one embodiment, the assist brake part may include a first assist hydraulic part, a second assist hydraulic part, an assist accumulator, a first assist bypass part, a second assist bypass part, and an assist sensing part. The first assist hydraulic part may be connected to the first hydraulic part. The first assist hydraulic part may be configured to carry hydraulic pressure. The second assist hydraulic part may be connected to the second hydraulic part. The second assist hydraulic part may be configured to carry hydraulic pressure. The assist accumulator may be connected to the first and second assist hydraulic parts and may be filled with the auxiliary hydraulic pressure.The first assist bypass part may be configured to bypass the first assist hydraulic part to supply hydraulic pressure to the assist accumulator. The second assist bypass part may be configured to bypass the second assist hydraulic part to supply hydraulic pressure to the assist accumulator. The assist sensing part may be configured to determine the auxiliary hydraulic pressure of the assist accumulator.

[0016] In a second embodiment of the invention, the main brake part comprises a master cylinder, a first hydraulic part, a second hydraulic part, and a main motor pump. The master cylinder is designed to generate hydraulic pressure together with the motor. The first hydraulic part is connected to the master cylinder. The first hydraulic part is designed to supply hydraulic pressure to first some of the plurality of wheel cylinders. The second hydraulic part is connected to the master cylinder. The second hydraulic part is designed to supply hydraulic pressure to second some of the plurality of wheel cylinders. The main motor pump is connected to the first and second hydraulic parts. The main motor pump is designed to amplify the hydraulic pressure.

[0017] The assist brake part has an assist hydraulic part, an assist accumulator, an assist bypass part, and an assist sensing part. The assist hydraulic part is connected to the first and second hydraulic parts. The assist hydraulic part is configured to conduct hydraulic pressure. The assist accumulator is connected to the assist hydraulic part and is filled with the auxiliary hydraulic pressure. The assist bypass part is configured to bypass the assist hydraulic part to conduct hydraulic pressure to the assist accumulator. The assist sensing part is configured to determine the auxiliary hydraulic pressure of the assist accumulator.

[0018] According to the invention, the assist accumulator is configured to receive the hydraulic pressure generated by the master cylinder to accumulate the auxiliary hydraulic brake pressure.

[0019] In one embodiment, the assist hydraulic part may include an assist hydraulic line and an assist hydraulic valve. The assist hydraulic line may have a first end connected to the first and second hydraulic parts and a second end connected to the assist accumulator. The assist hydraulic valve may be configured to open the assist hydraulic line in response to an operational fault of the main brake part.

[0020] In one embodiment, the assist bypass portion may include an assist bypass line and an assist bypass valve. The assist bypass line may have ends connected to the assist hydraulic line. The assist bypass line may be configured to at least partially cause hydraulic pressure to bypass the assist hydraulic valve and move to the assist accumulator. The assist bypass valve may be configured to at least partially determine a flow direction of the auxiliary hydraulic pressure in the assist bypass line.

[0021] In one embodiment, the electronic hydraulic brake device may further include a storage portion connected to the pedal cylinder and configured to store hydraulic pressure. For this purpose, the assist brake portion may further include an assist pump connected to the storage portion. The assist pump may be configured to transfer the hydraulic pressure stored in the storage portion to the assist accumulator.

[0022] In one embodiment, the assist brake part may include a first assist hydraulic part, a second assist hydraulic part, an assist accumulator, a first assist bypass part, a second assist bypass part, and an assist sensing part. The first assist hydraulic part may be connected to the first hydraulic part. The first assist hydraulic part may be configured to carry hydraulic pressure. The second assist hydraulic part may be connected to the second hydraulic part. The second assist hydraulic part may be configured to carry hydraulic pressure. The assist accumulator may be connected to the first and second assist hydraulic parts and may be filled with the auxiliary hydraulic pressure.The first assist bypass part may be configured to bypass the first assist hydraulic part to supply hydraulic pressure to the assist accumulator. The second assist bypass part may be configured to bypass the second assist hydraulic part to supply hydraulic pressure to the assist accumulator. The assist sensing part may be configured to determine the auxiliary hydraulic pressure of the assist accumulator.

[0023] In some aspects of an electronic hydraulic brake device, a main brake part and a backup brake part may be connected as a hydraulic pressure circuit for moving hydraulic pressure, and the backup hydraulic pressure stored in a backup brake part may be moved to the main brake part and supplied to wheel cylinders in response to an operation failure of the main brake part. Further, in some aspects of an electronic hydraulic brake device, a backup pump may forcibly move fluid stored in a storage part to an backup accumulator. Thus, in response to an operation failure of the main brake part, backup hydraulic pressure for performing vehicle braking may be continuously supplied to the backup accumulator.

[0024] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the inventive concepts, are incorporated in and constitute a part of this specification, illustrate embodiments of the inventive concepts, and together with the description serve to explain the principles of the inventive concepts. Fig. 1 is a schematic diagram of an electronic hydraulic brake device according to an embodiment. Fig. 2 is a schematic representation of a main brake part according to an embodiment. Fig. 3 is a schematic representation of a brake system connected to the main brake part of Fig. 2 connected support brake part according to an embodiment. Fig. 4 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 3, wherein an assist accumulator is filled with a high hydraulic brake pressure, according to one embodiment. Fig. 5 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 3, wherein the high hydraulic brake pressure stored in the assist accumulator is supplied to one or more wheel cylinders, according to one embodiment. Fig. 6 is a schematic representation of a brake system associated with the assist brake part of Fig. 2 added support pump according to an embodiment. Fig. 7 is a schematic representation of a brake system connected to the main brake part of Fig. 2 connected assist braking system according to an embodiment. Fig. 8 is a schematic diagram of a main brake part according to an embodiment. Fig. 9 is a schematic representation of a brake system connected to the main brake part of Fig. 8 connected support brake part according to an embodiment. Fig. 10 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 9, wherein an assist accumulator is filled with a high hydraulic brake pressure, according to one embodiment. Fig. 11 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 9, wherein a high hydraulic brake pressure stored in an assist accumulator is supplied to one or more wheel cylinders, according to one embodiment. Fig. 12 is a schematic representation of a brake system associated with the assist brake part of Fig. 9 added support pump according to an embodiment. Fig. 13 is a schematic representation of a brake system connected to the main brake part of Fig. 8 connected assist braking system according to an embodiment. DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

[0026] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of various example embodiments. As used herein, "embodiments" and "implementations" are interchangeable terms that are non-limiting examples in which one or more of the inventive concepts disclosed herein are utilized. However, it will be apparent that various embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and devices are shown in block diagram form to avoid unnecessarily obscuring various embodiments. Further, various embodiments may be different but need not be exclusive.For example, specific shapes, configurations, and characteristics of one embodiment may be used or implemented in another embodiment without departing from the inventive concepts.

[0027] Unless otherwise indicated, the illustrated embodiments are to be understood as providing exemplary features with varying details of some embodiments. Therefore, unless otherwise indicated, the features, components, modules, layers, films, plates, regions, aspects, etc. (hereinafter referred to individually or collectively as "element" or "elements") of the various embodiments may be otherwise combined, separated, interchanged, and / or rearranged without departing from the inventive concepts.

[0028] The use of hatching and / or shading in the accompanying drawings is generally intended to clearly indicate boundaries between adjacent elements. Thus, neither the presence nor the absence of hatching or shading conveys a preference or requirement for particular materials, material properties, dimensions, proportions, commonalities between depicted elements and / or other characteristics, attributes, properties, etc. of the elements, unless stated. Furthermore, in the accompanying drawings, the size and relative sizes of elements may be exaggerated for clarity and / or descriptive purposes. Thus, the sizes and relative sizes of the respective elements are not necessarily limited to those shown in the drawings.If an embodiment can be implemented differently, a specific process sequence may be performed that differs from the described sequence. For example, two consecutive described processes may be performed substantially concurrently or in an order opposite to the described sequence. Furthermore, like reference numerals indicate like elements.

[0029] When an element is described as being "on," "connected to," or "coupled to" another element, it may be directly on, connected to, or coupled to the other element, or there may be intervening elements. However, when an element is described as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements. Other terms and / or phrases used to describe a relationship between elements should be construed in the same way, e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," "on" versus "directly upon," etc. Further, the term "connected" may refer to a physical, electrical, and / or fluidic connection.For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" encompasses any combination of one or more of the associated listed parts.

[0030] Although the terms "first," "second," etc., may be used herein to describe various elements, these elements are not to be limited by these terms. These terms are used to distinguish one element from another. Thus, a first element discussed below may be referred to as a second element without departing from the teachings of the disclosure.

[0031] Terms regarding a spatial relationship, such as "beneath," "under," "lower," "above," "upper," "above," "higher," "side" (as in "sidewall"), and the like, may be used herein for descriptive purposes and thereby to describe an element in relation to another element(s) as illustrated in the drawings. Terms regarding a spatial relationship encompass different orientations of a device during use, operation, and / or manufacture in addition to the orientation shown in the drawings. For example, if the device is rotated in the drawings, elements described as being "below" or "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an above and below orientation. Further, the device can be oriented differently (e.g.,rotated by 90 degrees or in other orientations), and thus the descriptors used here indicating a spatial relationship are interpreted accordingly.

[0032] The technology used herein is for the purpose of describing specific embodiments and should not be considered limiting. As used herein, the singular forms "a," "an," and "the" also include the plural forms unless the context clearly indicates otherwise. Furthermore, the terms "comprise," "comprising," "comprises," and / or "having," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.It should further be understood that, as used herein, the terms "substantially," "approximately," and other similar terms are used as terms of approximation rather than of degree, and are thus used to account for inherent variations in measured, calculated, and / or provided values, as would be appreciated by one of ordinary skill in the art.

[0033] Various embodiments are described herein with reference to sectional views, isometric views, perspective views, plan views, and / or exploded views, which are schematic representations of idealized embodiments and / or intermediate structures. Thus, deviations from the illustrated shapes are to be expected, for example, due to manufacturing techniques and / or tolerances. Thus, the embodiments disclosed herein are not to be construed as limiting to the specific illustrated shapes of regions, but include variations in shapes resulting, for example, from manufacturing. Thus, regions illustrated in the drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of regions of a device and are thus not to be understood as limiting.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein should be understood as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms such as those defined in commonly used dictionaries should be interpreted so that their meaning is consistent with their meaning in the context of the relevant prior art and should not be interpreted in an idealized or overly formal sense unless expressly defined so herein.

[0035] Hereinafter, various embodiments of an electronic hydraulic brake device will be described with reference to the accompanying drawings.

[0036] Fig. 1 is a schematic diagram of an electronic hydraulic brake device according to an embodiment.

[0037] According to Fig. 1, the electronic hydraulic brake device according to an embodiment comprises a main brake part 1 and a support brake part 2.

[0038] The main brake part 1 drives a motor to provide hydraulic braking pressure to a plurality of wheel cylinders, such as wheel cylinders 3. Hereinafter, the wheel cylinder 3 is referred to as the plurality of wheel cylinders 3. The auxiliary brake part 2 is connected to the main brake part 1 and filled with a high (or auxiliary) hydraulic braking pressure. The auxiliary brake part 2 provides hydraulic braking pressure to the plurality of wheel cylinders 3 in response to an operational failure of the main brake part 1.

[0039] According to some embodiments, in the electronic hydraulic braking device of an electric vehicle, hybrid vehicle, or autonomous vehicle, an electronic braking device may be divided into at least two parts, e.g., the main braking part 1 and the auxiliary braking part 2. When an operational failure of the main braking part 1 occurs, the high hydraulic braking pressure stored in the auxiliary braking part 2 may be quickly supplied to the wheel cylinders 3 to perform emergency braking. The operational failure of the main braking part 1 may indicate that the motor cannot be driven or may indicate an operational failure of one or more valves for controlling a hydraulic circuit.

[0040] Fig. 2 is a schematic representation of a main brake part according to an embodiment.

[0041] According to Fig. 2, the main brake part 1 according to one embodiment comprises a pedal cylinder 110, a master cylinder 120, a first hydraulic part 130, a second hydraulic part 140 and a hydraulic connection 150.

[0042] The pedal cylinder part 110 generates hydraulic pressure by pressurizing a pedal 119. Such a pedal cylinder 110 may have two chambers formed therein, and may provide a stepping force for handling the pressurization of the pedal 119.

[0043] The master cylinder 120 senses whether the pedal 119 is depressed and generates hydraulic pressure by driving a motor 129. The master cylinder 120 may form (or have) one or more chambers. The motor 129 may be driven in a forward or reverse direction depending on the pressurization state of the pedal 119. The master cylinder 120 may be connected to the pedal cylinder 110 via a cylinder line 128.

[0044] The first hydraulic part 130 is connected to the master cylinder 120 and supplies a braking pressure to some of the plurality of wheel cylinders 3. For example, the first hydraulic part 130 may supply a hydraulic pressure to first wheel cylinders 4 mounted on one of the two front wheels and one of the two rear wheels, respectively.

[0045] For example, the first hydraulic part 130 may have a first-first hydraulic line 131 connected to the master cylinder 120 for carrying a brake pressure and a first-second hydraulic line 132 connected to the first-first hydraulic line 131 and diverging from the first-first hydraulic line 131 for carrying a brake pressure to the first wheel cylinders 4.

[0046] The second hydraulic part 140 is connected to the master cylinder 120 and supplies a braking pressure to other ones of the plurality of wheel cylinders 3. For example, the second hydraulic part 140 may supply a hydraulic pressure to second wheel cylinders 5 mounted on the other one of the two front wheels and the other one of the two rear wheels, respectively.

[0047] For example, the second hydraulic part 140 may have a second-first hydraulic line 141 connected to the master cylinder 120 for carrying a brake pressure and a second-second hydraulic line 142 connected to the second-first hydraulic line 141 and diverging from the second-first hydraulic line 141 for carrying a brake pressure to the second wheel cylinders 5.

[0048] The hydraulic port 150 connects (e.g., fluidly connects) the first and second hydraulic parts 130 and 140 or disconnects, e.g., prevents hydraulic flow between the first and second hydraulic parts 130 and 140. For example, the hydraulic port 150 may connect the first-second hydraulic line 132 and the second-second hydraulic line 142.

[0049] Fig. 3 is a schematic representation of a brake system connected to the main brake part of Fig. 2 connected support brake part according to an embodiment. Fig. 4 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 3, wherein an assist accumulator is filled with a high hydraulic brake pressure, according to one embodiment. Fig. 5 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 3, wherein the high hydraulic brake pressure stored in the assist accumulator is supplied to one or more wheel cylinders, according to one embodiment.

[0050] According to Fig. 3, the assist brake part 2 comprises an assist hydraulic part 10, an assist accumulator 20, an assist bypass part 30, and an assist sensing part 40. In an operating state, the hydraulic port 150 can enable movement of the hydraulic brake pressure between the first and second hydraulic parts 130 and 140.

[0051] The support hydraulic part 10 is connected to one of the first and second hydraulic parts 130 and 140 for conducting a hydraulic brake pressure. For example, the support hydraulic part 10 can be connected to the first-second hydraulic line 132 or the second-second hydraulic line 142. For example, Fig. 3 shows the support hydraulic part 10 as connected to the first-second hydraulic line 132.

[0052] The assist accumulator 20 is connected to the assist hydraulic part 10 and can be filled with a high hydraulic brake pressure.

[0053] The assist bypass part 30 bypasses the assist hydraulic part 10 when supplying the hydraulic brake pressure to the assist accumulator 20. The assist accumulator 20 can be filled with the hydraulic brake pressure through the assist bypass part 30. The hydraulic brake pressure of the assist accumulator 20 can be supplied to the first or second hydraulic part 130 or 140 through the assist hydraulic part 10.

[0054] The assist sensing part 40 measures the hydraulic brake pressure of the assist accumulator 20. For example, the assist sensing part 40 may be configured to measure the hydraulic brake pressure in the assist hydraulic part 10 or the assist accumulator 20 (or otherwise communicate with it).

[0055] In an operating state, the motor 129 can be driven in an initial phase to fill the assist accumulator 20 with a high hydraulic brake pressure. A hydraulic brake pressure generated by the master cylinder 120 can be moved to the assist accumulator 20. At this time, the movement of the hydraulic brake pressure to the cylinder line 128 is restricted, and the movement of the hydraulic brake pressure to the first and second wheel cylinders 4 and 5 is also restricted (see Fig. 4).

[0056] When an operational failure of the main brake part 1 occurs in a state where vehicle braking is required, the high hydraulic braking pressure stored in the assist accumulator 20 is moved to the first-second hydraulic line 132 and / or the second-second hydraulic line 142 and then moved to the first wheel cylinders 4 and the second wheel cylinders 5. At this time, the movement of the hydraulic braking pressure to the first-first hydraulic line 131 and the second-first hydraulic line 141 is restricted (see Fig. 5).

[0057] When the first hydraulic line 131 and the second hydraulic line 141 are opened during vehicle braking by the auxiliary brake part 2, the hydraulic braking pressure of the wheel cylinders 3 can be released. When the hydraulic braking pressure needs to be released quickly, such as in vehicle attitude control, the hydraulic braking pressure applied to the wheel cylinders 3 can be adjusted by valve-controlled control of the first hydraulic line 132 and the second hydraulic line 142.

[0058] The assist hydraulic part 10 has an assist hydraulic line 11 and an assist hydraulic valve 12. The assist hydraulic line 11 has one end connected to one of the first and second hydraulic parts 130 and 140, and the other end connected to the assist accumulator 20 via the assist hydraulic valve 12. For example, the assist hydraulic line 11 may have one end connected to the first-second hydraulic line 132 or the second-second hydraulic line 142. As shown in Fig. 3, the assist hydraulic line 11 is connected to the first-second hydraulic line 132. The assist hydraulic valve 12 is formed on (or connected to) the assist hydraulic line 11 and opens the assist hydraulic line 11 when an operation failure of the main brake system 1 occurs.

[0059] The assist bypass part 30 includes an assist bypass line 31 and an assist bypass valve 32. The assist bypass line 31 has both ends connected to the assist hydraulic line 11 and causes hydraulic braking pressure to move to the assist accumulator 20, bypassing the assist hydraulic valve 12. The assist bypass valve 32 is formed on the assist bypass line 31 and allows the hydraulic braking pressure to move in one direction. For example, when the assist accumulator 20 needs to be filled with hydraulic braking pressure, the assist hydraulic valve 12 can close the assist hydraulic line 11, allowing the hydraulic braking pressure to move to the assist accumulator 20 through the assist bypass line 31.A check valve capable of allowing brake fluid to move in one direction may be used as the assist bypass valve 32.

[0060] Fig. 6 is a schematic representation of a brake system associated with the assist brake part of Fig. 2 added support pump according to an embodiment.

[0061] According to Fig. 6, according to one embodiment, the assist brake part 2 may further include an assist pump 50. The assist pump 50 is connected to a storage part 118, which may be connected to the pedal cylinder 110 for temporarily storing hydraulic brake pressure and forcibly transmitting the hydraulic brake pressure stored in the storage part 118 to the assist accumulator 20. Since the hydraulic brake pressure can be continuously supplied to the assist accumulator 20 via the assist pump 50, vehicle braking can be continuously performed even if an operational failure occurs in the main brake part 1, such as engine failure.

[0062] Fig. 7 is a schematic representation of a brake system connected to the main brake part of Fig. 2 connected assist braking system according to an embodiment.

[0063] According to Fig. 7, the assist brake part 2 according to one embodiment includes a first assist hydraulic part 61, a second assist hydraulic part 62, an assist accumulator 70, a first assist bypass part 81, a second assist bypass part 82, and an assist sensing part 90. In an operating state, the hydraulic port 150 restricts the movement of the hydraulic brake pressure between the first hydraulic part 130 and the second hydraulic part 140 and maintains the state in which the first and second hydraulic parts 130 and 140 are partitioned relative to the hydraulic fluid flow.

[0064] The first assist hydraulic part 61 is connected to the first hydraulic part 130 for conducting the hydraulic braking pressure, and the second assist hydraulic part 62 is connected to the second hydraulic part 140 for conducting the hydraulic braking pressure. For example, the first assist hydraulic part 61 may connect the first-second hydraulic line 132 to the assist accumulator 70, and the second assist hydraulic part 62 may connect the second-second hydraulic line 142 to the assist accumulator 70 or the first assist hydraulic part 61.

[0065] The assist accumulator 70 is connected to the first and second hydraulic parts 61 and 62 and can be filled with a high hydraulic brake pressure.

[0066] The first assist bypass part 81 bypasses a first assist hydraulic valve of the first assist hydraulic part 61 when supplying a hydraulic braking pressure to the assist accumulator 70, and the second assist bypass part 82 bypasses a second assist hydraulic valve of the second assist hydraulic part 62 when supplying a hydraulic braking pressure to the assist accumulator 70. For example, the assist accumulator 70 may be filled with a hydraulic braking pressure through at least one of the first and second assist bypass parts 81 and 82, and the hydraulic braking pressure of the assist accumulator 70 may be moved to each of the first and second assist bypass parts 81 and 82.

[0067] The assist sensing part 90 measures the hydraulic brake pressure of the assist accumulator 70. For example, the assist sensing part 90 may be configured to measure the hydraulic brake pressure in (or otherwise communicate with) the first and second assist hydraulic parts 61 and 62 and / or the assist accumulator 70.

[0068] In an operating state, the motor 129 can be driven in an initial phase to fill the assist accumulator 70 with a high hydraulic brake pressure. Then, the hydraulic brake pressure generated by the master cylinder 120 can be moved to the assist accumulator 70. At this time, the movement of the hydraulic brake pressure to the cylinder line 128 is restricted, and the movement of the hydraulic brake pressure to the first and second wheel cylinders 4 and 5 is also restricted.

[0069] When an operational failure of the main brake part 1 occurs in a state where vehicle braking is required, the high hydraulic braking pressure stored in the assist accumulator 70 is moved to the first-second hydraulic line 132 and the second-second hydraulic line 142 via the first and second assist hydraulic parts 61 and 62, respectively, and then moved to the first wheel cylinders 4 and the second wheel cylinders 5. At this time, the movement of the hydraulic braking pressure to the first-first hydraulic line 131 and the second-first hydraulic line 142 is restricted.

[0070] When the first hydraulic line 131 and the second hydraulic line 141 are opened during vehicle braking by the auxiliary brake part 2, the hydraulic braking pressure of the wheel cylinders 3 can be released. When the hydraulic braking pressure needs to be released quickly, such as in vehicle attitude control, the hydraulic braking pressure applied to the wheel cylinders 3 can be adjusted by valve-controlled control of the first hydraulic line 132 and the second hydraulic line 142.

[0071] More detailed structures of the first and second support hydraulic parts 61 and 62 may be similar to those of the support hydraulic part 10 of Fig. 3, and more detailed structures of the first and second support bypass parts 81 and 82 may be similar to those of the support bypass part 30 of Fig. 3. It is further provided that the support pump 50 of Fig. 6 at the support accumulator 70 of Fig. 7 is applied.

[0072] Fig. 8 is a schematic diagram of a main brake part according to an embodiment.

[0073] According to Fig. 8, a main brake part 1 according to an embodiment comprises a main motor pump 210, a master cylinder 220, a first hydraulic part 230 and a second hydraulic part 240.

[0074] The master cylinder 220 generates hydraulic braking pressure by operating a motor 229. The master cylinder 220 may form two chambers, and the motor 229 may be driven in a forward or reverse direction depending on the pressurization state of the pedal. In some embodiments, the pedal may be in communication with the master cylinder 220 to cause operation of the motor 229 to facilitate hydraulic fluid flow. In some embodiments, the pedal may be in communication with the motor 229 to cause operation of the master cylinder 220.

[0075] The first hydraulic part 230 is connected to the master cylinder 220 and supplies a braking pressure to some of the plurality of wheel cylinders 3. For example, the first hydraulic part 230 may supply a hydraulic pressure to the first wheel cylinders 4 mounted on one of the two front wheels and one of the two rear wheels, respectively.

[0076] The second hydraulic part 240 is connected to the master cylinder 220 and supplies a braking pressure to the other of the plurality of wheel cylinders 3. For example, the second hydraulic part 240 may supply a hydraulic pressure to the second wheel cylinders 5 mounted on the other of the two front wheels and the other of the two rear wheels, respectively.

[0077] The main motor pump 210 is connected to the first and second hydraulic parts 230 and 240 to amplify the hydraulic brake pressure.

[0078] The first hydraulic part 230 may include a first-first hydraulic line 231 connecting the master cylinder 220 to the main motor pump 210, and a first-second hydraulic line 232 connected to and diverging from the first-first hydraulic line 231 for supplying a braking pressure to the first wheel cylinders 4.

[0079] The second hydraulic part 240 may include a second-first hydraulic line 241 connecting the master cylinder 220 to the main motor pump 210, and a second-second hydraulic line 242 connected to the second-first hydraulic line 241 and diverging from the second-first hydraulic line 241 for supplying a braking pressure to the second wheel cylinders 5.

[0080] Fig. 9 is a schematic representation of a brake system connected to the main brake part of Fig. 8 connected support brake part according to an embodiment. Fig. 10 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 9, wherein an assist accumulator is filled with a high hydraulic brake pressure, according to one embodiment. Fig. 11 is a schematic representation of a hydraulic pressure curve through the electronic hydraulic brake device of Fig. 9, wherein a high hydraulic brake pressure stored in an assist accumulator is supplied to one or more wheel cylinders, according to one embodiment.

[0081] According to Fig. 9, the assist brake part 2 has an assist hydraulic part 10, an assist accumulator 20, an assist bypass part 30 and an assist sensing part 40.

[0082] The assist hydraulic part 10 is connected to the first and second hydraulic parts 230 and 240 for conducting a hydraulic brake pressure. For example, the assist hydraulic part 10 may be connected to the first-second hydraulic line 232 and the second-second hydraulic line 242.

[0083] The assist accumulator 20 may be connected to the assist hydraulic part 10 and filled with a high hydraulic brake pressure.

[0084] The assist bypass part 30 bypasses an assist hydraulic valve 12 of the assist hydraulic part 10 when supplying the hydraulic braking pressure to the assist accumulator 20. For example, the assist accumulator 20 may be filled with the hydraulic braking pressure through the assist bypass part 30, and the hydraulic braking pressure of the assist accumulator 20 may be supplied to the first or second hydraulic part 230 or 240 through the assist hydraulic part 10.

[0085] The assist sensing part 40 measures the hydraulic brake pressure of the assist accumulator 20. For example, the assist sensing part 40 may be configured to measure the hydraulic brake pressure in (or connected to) at least one of the assist hydraulic part 10 and the assist accumulator 20.

[0086] In an operating state, the motor 229 and the main motor pump 210 can be driven in an initial phase to fill the assist accumulator 20 with a high hydraulic braking pressure. Then, the hydraulic braking pressure generated by the master cylinder 220 is moved to the main motor pump 210 through the first-first hydraulic line 231 and the second-first hydraulic line 241, and the hydraulic braking pressure that has passed through the main motor pump 210 is moved to the assist accumulator 20 through the assist hydraulic part 10 connected to the first-second hydraulic line 232 and the second-second hydraulic line 242. At this time, the movement of the hydraulic braking pressure from the main motor pump 210 to the master cylinder 220 is restricted, and the movement of the hydraulic braking pressure to the first and second wheel cylinders 4 and 5 is restricted (see Fig. 10).

[0087] When an operation failure of the main brake part 1 occurs in the case where vehicle braking is required, the high hydraulic braking pressure stored in the assist accumulator 20 is moved to the first-second hydraulic line 232 and the second-second hydraulic line 242 and then moved to the first wheel cylinders 4 and the second wheel cylinders 5. At this time, the movement of the hydraulic braking pressure to the first-first hydraulic line 231 and the second-first hydraulic line 242 is restricted (see Fig. 11).

[0088] When the first hydraulic line 231 and the second hydraulic line 241 are opened during vehicle braking by the auxiliary brake part 2, the hydraulic braking pressure of the wheel cylinders 3 can be released. When the hydraulic braking pressure needs to be released quickly, such as in vehicle attitude control, the hydraulic braking pressure applied to the wheel cylinders 3 can be adjusted by valve-controlled control of the first hydraulic line 232 and the second hydraulic line 242.

[0089] The assist hydraulic part 10 includes an assist hydraulic line 11 and an assist hydraulic valve 12. One end of the assist hydraulic line 11 is connected to the first and second hydraulic parts 230 and 240, and the other end of the assist hydraulic line 11 is connected to the assist accumulator 20 via the assist hydraulic valve 12. For example, the assist hydraulic line 11 may have one end connected to the first-second hydraulic line 232 and the second-second hydraulic line 242. The assist hydraulic valve 12 is formed on (or connected to) the assist hydraulic line 11 and opens the assist hydraulic line 11 when an operational failure of the main brake system 1 occurs.

[0090] The assist bypass part 30 includes an assist bypass line 31 and an assist bypass valve 32. The assist bypass line 31 has both ends connected to the assist hydraulic line 11, and causes braking hydraulic pressure to bypass the assist hydraulic valve 12 and move to the assist accumulator 20. The assist bypass valve 32 is formed on (or connected to) the assist bypass line 31 and allows the braking hydraulic pressure to move in one direction. For example, when the assist accumulator 20 is filled with braking hydraulic pressure, the assist hydraulic valve 12 can close the assist hydraulic line 11, allowing the braking hydraulic pressure to move through the assist bypass line 31.In this case, a check valve capable of allowing a brake fluid to move in one direction may be used as the assist bypass valve 32.

[0091] Fig. 12 is a schematic representation of a brake system associated with the assist brake part of Fig. 9 added support pump according to an embodiment.

[0092] According to Fig. 12, according to one embodiment, the assist brake part 2 may further include an assist pump 50. The assist pump 50 is connected to a storage part 228, which may be connected to the master cylinder 220 for temporarily storing hydraulic braking pressure and forcibly transmitting the hydraulic braking pressure stored in the storage part 228 to the assist accumulator 20. Since the hydraulic braking pressure can be continuously supplied to the assist accumulator 20 via the assist pump 50, vehicle braking can be continuously performed even if an operational failure occurs in the main brake part 1, such as damage to the motor 229.

[0093] Fig. 13 is a schematic representation of a brake system connected to the main brake part of Fig. 8 connected assist braking system according to an embodiment.

[0094] According to Fig. 13, the assist brake system 2 includes a first assist hydraulic part 61, a second assist hydraulic part 62, an assist accumulator 70, a first assist bypass part 81, a second assist bypass part 82, and an assist sensing part 90.

[0095] The first assist hydraulic part 61 is connected to the first hydraulic part 230 for conducting a hydraulic braking pressure, and the second assist hydraulic part 62 is connected to the second hydraulic part 240 for conducting a hydraulic braking pressure. For example, the first hydraulic part 61 may connect the first-second hydraulic line 232 to the assist accumulator 70, and the second assist part 62 may connect the second-second hydraulic line 242 to the assist accumulator 70 or the first hydraulic part 61.

[0096] The assist accumulator 70 may be connected to the first and second assist hydraulic parts 61 and 62 and may be filled with a high hydraulic brake pressure.

[0097] The first assist bypass part 81 bypasses a first assist hydraulic valve of the first assist hydraulic part 61 when supplying a hydraulic braking pressure to the assist accumulator 70, and the second assist bypass part 82 bypasses a second assist hydraulic valve of the second assist hydraulic part 62 when supplying a hydraulic braking pressure to the assist accumulator 70. For example, the assist accumulator 70 may be filled with a hydraulic braking pressure through at least one of the first and second assist bypass parts 81 and 82, and the hydraulic braking pressure of the assist accumulator 70 may be moved to each of the first and second assist bypass parts 81 and 82.

[0098] The assist sensing part 90 measures the hydraulic braking pressure of the assist accumulator 70. For example, the assist sensing part 90 may be configured to measure the hydraulic braking pressure in at least one of the first and second assist hydraulic parts 61 and 62 or the assist accumulator 70 (or otherwise connected thereto).

[0099] In an operating state, the motor 229 can be driven in an initial phase to fill the assist accumulator 70 with a high hydraulic braking pressure. Then, the hydraulic braking pressure generated by the master cylinder 220 can be moved to the assist accumulator 70. At this time, the movement of the hydraulic braking pressure from the main motor pump 210 to the master cylinder 220 is restricted, and the movement of the hydraulic braking pressure to the first and second wheel cylinders 4 and 5 is also restricted.

[0100] When an operational failure of the main brake part 1 occurs in a case where vehicle braking is required, the high hydraulic braking pressure stored in the assist accumulator 70 is moved to the first-second hydraulic line 232 and the second-second hydraulic line 242, and then moved to the first wheel cylinders 4 and the second wheel cylinders 5. At this time, the movement of the hydraulic braking pressure to the first-first hydraulic line 231 and the second-first hydraulic line 242 is restricted.

[0101] When the first hydraulic line 231 and the second hydraulic line 241 are opened during vehicle braking by the auxiliary brake part 2, the hydraulic braking pressure of the wheel cylinders 3 can be released. When the hydraulic braking pressure needs to be released quickly, such as in vehicle attitude control, the hydraulic braking pressure applied to the wheel cylinders 3 can be adjusted by valve-controlled control of the first hydraulic line 232 and the second hydraulic line 242.

[0102] More detailed structures of the first and second support hydraulic parts 61 and 62 may be similar to those of the support hydraulic part 10 of Fig. 3, and the detailed structures of the first and second support bypass parts 81 and 82 may be the same as those of the support bypass part 30 of Fig. 3. It is intended that the support pump 50 of Fig. 12 at the support accumulator 70 of Fig. 13 is applied.

[0103] In an electronic hydraulic brake device according to various embodiments, the main brake part 1 and the auxiliary brake part 2 may be connected as a hydraulic pressure circuit for moving a hydraulic braking pressure, and a high hydraulic braking pressure stored in the auxiliary brake part 2 may be moved to the main brake part 1 and supplied to the wheel cylinders 3 in response to an operational failure of the main brake part 1. Furthermore, the auxiliary pump 50 may be used to forcibly move brake fluid stored in the storage part 118 or 228 to the auxiliary accumulator 50. Thus, when an operational failure of the main brake part 1 occurs, an auxiliary hydraulic pressure for performing vehicle braking can be continuously supplied to the auxiliary accumulator 20.

[0104] Although specific embodiments and implementations have been described herein, other embodiments and modifications will be apparent from the description. Thus, the concepts of the invention are not limited to such embodiments, but rather, are intended to encompass the broader scope of the appended claims and various obvious modifications and equivalent arrangements apparent to one of ordinary skill in the art.

Claims

[1] Electronic hydraulic braking device comprising: a main brake part (1) adapted to drive a motor (129, 229) for providing hydraulic pressure to a plurality of wheel cylinders (3); and a support brake part (2) connected to the main brake part (1), the support brake part (2) being configured to provide an auxiliary hydraulic pressure to the plurality of wheel cylinders (3) in response to an operational error of the main brake part (1), the main brake part (1) comprising: a pedal cylinder (110) configured to generate hydraulic pressure in response to pressure being applied to a pedal (119); a master cylinder (120, 220) configured to sense an operation of the pedal (119) and to generate hydraulic pressure together with the motor (129, 229); a first hydraulic part (130, 230) connected to the master cylinder (120, 220), the first hydraulic part (130, 230) being configured to supply hydraulic pressure to first some of the plurality of wheel cylinders (3); a second hydraulic part (140, 240) connected to the master cylinder (120, 220), the second hydraulic part (140, 240) being configured to supply hydraulic pressure to second ones of the plurality of wheel cylinders (3); and a hydraulic port (150) configured to selectively connect the first and second hydraulic portions (130, 140, 230, 240); and. wherein the assist brake part (2) comprises: a support hydraulic part (10) connected to one of the first and second hydraulic parts (130, 140, 230, 240), the support hydraulic part (10) being configured to carry hydraulic pressure; an assist accumulator (20, 70) connected to the assist hydraulic part (10) and filled with the auxiliary hydraulic pressure; an assist bypass part (30) configured to bypass the assist hydraulic part (10) to selectively supply hydraulic pressure to the assist accumulator (20, 70); and an assist sensing part (40, 90) configured to determine the auxiliary hydraulic pressure of the assist accumulator (20, 70). characterized by , that the assist accumulator (20, 70) is configured to selectively receive the hydraulic pressure generated by the master cylinder (120, 220) to accumulate the auxiliary hydraulic brake pressure. [2] Electronic hydraulic brake device according to claim 1, wherein the assist hydraulic part (10) comprises: an assist hydraulic line (11) having a first end connected to one of the first and second hydraulic parts (130, 140, 230, 240) and a second end connected to the assist accumulator (20, 70); and an assist hydraulic valve (12) configured to open the assist hydraulic line (11) in response to an operational error of the main brake part (1). [3] An electronic hydraulic brake device according to claim 2, wherein the assist bypass part (30) comprises: an assist bypass line (31) having ends connected to the assist hydraulic line (11), the assist bypass line (31) being configured to at least partially cause hydraulic pressure to bypass the assist hydraulic valve (12) and travel to the assist accumulator (20, 70); and an assist bypass valve (32) configured to at least partially effect a flow direction of the auxiliary hydraulic pressure in the assist bypass line (31). [4] An electronic hydraulic brake device according to claim 1, further comprising: a storage part (118) connected to the pedal cylinder (110) and designed to store hydraulic pressure, wherein the assist brake part (2) further comprises an assist pump (50) connected to the storage part (118), the assist pump (50) being configured to transmit the hydraulic pressure stored in the storage part (118) to the assist accumulator (20, 70). [5] Electronic hydraulic brake device according to claim 1, wherein the assist brake part (2) comprises: a first assist hydraulic part (61) connected to the first hydraulic part (130, 230), the first assist hydraulic part (61) being configured to carry hydraulic pressure; a second assist hydraulic part (62) connected to the second hydraulic part (140, 240), the second assist hydraulic part (62) being configured to carry hydraulic pressure; wherein the assist accumulator (20, 70) connected to the first and second assist hydraulic parts (61, 62); a first assist bypass part (81) configured to bypass the first assist hydraulic part (61) to supply hydraulic pressure to the assist accumulator (20, 70); a second assist bypass part (82) configured to bypass the second assist hydraulic part (62) to supply hydraulic pressure to the assist accumulator (20, 70); and an assist sensing part (40, 90) configured to determine the auxiliary hydraulic pressure of the assist accumulator (20, 70). [6] Electronic hydraulic braking device comprising: a main brake part (1) adapted to drive a motor (129, 229) for providing hydraulic pressure to a plurality of wheel cylinders (3); and a support brake part (2) connected to the main brake part (1), the support brake part (2) being configured to provide an auxiliary hydraulic pressure to the plurality of wheel cylinders (3) in response to an operational error of the main brake part (1), wherein the main brake part (1) comprises: a master cylinder (120, 220) configured to sense an operation of the pedal (119) and to generate hydraulic pressure together with the motor (129, 229); a first hydraulic part (130, 230) connected to the master cylinder (120, 220), the first hydraulic part (130, 230) being configured to supply hydraulic pressure to first some of the plurality of wheel cylinders (3); a second hydraulic part (140, 240) connected to the master cylinder (120, 220), the second hydraulic part (140, 240) being configured to supply hydraulic pressure to some second of the plurality of wheel cylinders (3); and a main motor pump (210) connected to the first and second hydraulic parts (130, 140, 230, 240), the main motor pump (210) being configured to amplify hydraulic pressure, the assist brake part (2) comprising: a support hydraulic part (10) connected to the first and second hydraulic parts (130, 140, 230, 240), the support hydraulic part (10) being configured to carry hydraulic pressure; an assist accumulator (20, 70) connected to the assist hydraulic part (10) and filled with the auxiliary hydraulic pressure; an assist bypass part (30) configured to bypass the assist hydraulic part (10) to selectively supply hydraulic pressure to the assist accumulator (20, 70); and an assist sensing part (40, 90) configured to determine the auxiliary hydraulic pressure of the assist accumulator (20, 70), characterized by , that the assist accumulator (20, 70) is configured to selectively receive the hydraulic pressure generated by the master cylinder (120, 220) to accumulate the auxiliary hydraulic brake pressure. [7] Electronic hydraulic brake device according to claim 6, wherein the assist hydraulic part (2) comprises: an assist hydraulic line (11) having a first end connected to the first and second hydraulic parts (130, 140, 230, 240) and a second end connected to the assist accumulator (20, 70); and an assist hydraulic valve (12) configured to open the assist hydraulic line (11) in response to an operational error of the main brake part (1). [8] Electronic hydraulic brake device according to claim 6, wherein the assist bypass part (30) comprises: an assist bypass line (31) having ends connected to the assist hydraulic line (11), the assist bypass line (31) being configured to at least partially cause hydraulic pressure to bypass the assist hydraulic valve (12) and travel to the assist accumulator (20, 70); and an assist bypass valve (32) configured to at least partially effect a flow direction of the auxiliary hydraulic pressure in the assist bypass line (31). [9] Electronic hydraulic brake device according to claim 6, further comprising: a storage part (118) connected to the pedal cylinder (110) and designed to store hydraulic pressure, wherein the assist brake part (2) further comprises an assist pump (50) connected to the storage part (118), the assist pump (50)e being configured to transmit the hydraulic pressure stored in the storage part (118) to the assist accumulator (20, 70). [10] Electronic hydraulic brake device according to claim 6, wherein the assist brake part (2) comprises: a first assist hydraulic part (61) connected to the first hydraulic part (130, 230), the first assist hydraulic part (61) being configured to carry hydraulic pressure; a second assist hydraulic part (62) connected to the second hydraulic part (140, 240), the second assist hydraulic part (62) being configured to carry hydraulic pressure; wherein the assist accumulator (20 70) connected to the first and second assist hydraulic parts (61, 62); a first assist bypass part (81) configured to bypass the first assist hydraulic part (61) to supply hydraulic pressure to the assist accumulator (20, 70); a second assist bypass part (82) configured to bypass the second assist hydraulic part (62) to supply hydraulic pressure to the assist accumulator (20, 70); and an assist sensing part (40, 90) configured to determine the auxiliary hydraulic pressure of the assist accumulator (20, 70).

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