Electronic hydraulic brake device

Abstract

Electronic hydraulic brake device (1) comprising: a pedal master cylinder (10) designed to generate hydraulic pressure by applying pressure to a pedal (19), wherein the pedal master cylinder (10) has a first master cylinder chamber (11) and a second master cylinder chamber (12); a reservoir (20) to store hydraulic fluid; an electric master cylinder (30) configured to generate hydraulic pressure in response to the reciprocating movement of a piston (38) in a cylinder (37) and a detected actuation of a pedal (19) to drive a motor (39), wherein the electric master cylinder (30) has a forward chamber (31) configured in a direction corresponding to the forward movement direction of the piston (38), and a reverse chamber (32) configured in a direction corresponding to the reverse movement of the piston (38); a wheel cylinder (40) designed to deliver a braking force to the front wheels and rear wheels; a storage line (50) that connects the pedal master cylinder (10) and the reservoir (20) to convey hydraulic fluid; a forward chamber line (60) which connects the first main cylinder chamber (11), the forward chamber (31) and the wheel cylinder (40) to convey hydraulic fluid; a reverse chamber line (70) which connects the second main cylinder chamber (12), the reverse chamber (32) and the wheel cylinder (40) to convey hydraulic fluid; and a connector (100) that selectively connects the forward chamber line (60) and the reverse chamber line (70) to convey hydraulic fluid; characterized by the fact that the reservoir (20) is divided into a first reservoir (21) and a second reservoir (22), and that the forward chamber lead (60) exhibits: a first forward chamber line (61) which connects the first main cylinder chamber (11) and the forward chamber (31); a first forward chamber valve (611) designed to open / close the first forward chamber line (61); a second forward chamber conduit (62) connected to the first forward chamber conduit (61); a second forward chamber valve (621) designed to open / close the second forward chamber line (62); a third forward chamber line (63) connected to the second forward chamber line (62) and a first cylinder of the first wheel cylinder (41); and a third forward chamber valve (631) designed to open / close the third forward chamber line (63).

Description

Cross-reference to related registrations

[0001] The present application claims priority from Korean patent application No. 10-2019-0103540, filed on August 23, 2019, which is incorporated by reference into the subject matter of the present application. Background of the invention: Area

[0002] Exemplary embodiments relate generally to an electronic hydraulic brake device and in particular to an electronic hydraulic brake device which can reduce the number of valve operations during a braking process and which can improve the response of the brakes. discussion

[0003] An electronic hydraulic brake system generally refers to a device that adjusts the brake pressure for each wheel using the hydraulic pressure from a motor-driven master cylinder in response to the pedal pressure applied by the driver, as detected by a sensor. The electronic hydraulic brake system typically includes a sensor that detects pedal travel, allowing the driver to perceive the desired brake pressure. The electronic hydraulic brake system may also incorporate a pedal motion simulator, enabling the driver to feel the same pedal pressure as with a conventional hydraulic brake system. Therefore, in response to the driver pressing the pedal, an electronic control unit detects the actuation and delivers hydraulic pressure to the master cylinder. The master cylinder then transmits brake pressure to the wheel cylinders of the respective wheels to apply braking force.

[0004] Some electronic hydraulic brake systems can use multiple valves to individually apply braking force to each wheel. For example, Korean patent application No. 10-2007-0104982, filed on October 30, 2007, entitled "Control Apparatus for Valve in Electro-Hydraulic Brake System," discloses an electronic hydraulic brake system. However, it should be noted that an increasing number of valves can lead to operational errors that may affect braking stability. Therefore, there is a need for a device capable of addressing this issue.

[0005] The information disclosed above in the background of the invention serves only to better understand the background of the invention concepts, and therefore may contain information that does not represent prior art. CN 1 04 648 368 A discloses an electronic hydraulic brake device with the features of the preamble of claim 1. Another hydraulic brake device is known from US 3 423 939 A. Overview of the invention

[0006] Some exemplary embodiments create an electronic hydraulic brake device that is not only able to reduce the number of valve operations during a braking process, but also to improve the response of the brakes.

[0007] Further aspects are explained in detail below and are partly derived from the disclosure or can be learned through the practical implementation of the invention concepts.

[0008] According to the invention, an electronic hydraulic brake device comprises: a pedal master cylinder, a reservoir, an electric master cylinder, a wheel cylinder, a storage line, a forward chamber line, a reverse chamber line, and a connector. The pedal master cylinder is configured to generate hydraulic pressure by pressing a pedal. The pedal master cylinder has a first master cylinder chamber and a second master cylinder chamber. The reservoir is divided into a first reservoir and a second reservoir to store hydraulic fluid. The electric master cylinder is configured to generate hydraulic pressure in response to the reciprocating movement of a piston in a cylinder and a detected actuation of a pedal to drive a motor.The electric master cylinder has a forward chamber oriented in the direction of the piston's forward movement and a reverse chamber oriented in the direction of the piston's reverse movement. The wheel cylinder is designed to deliver braking force to the front and rear wheels. The accumulator line connects the pedal master cylinder and the reservoir to carry hydraulic fluid. The forward chamber line connects the first master cylinder chamber, the forward chamber, and the wheel cylinder to carry hydraulic fluid. The reverse chamber line connects the second master cylinder chamber, the reverse chamber, and the wheel cylinder to carry hydraulic fluid. The connector selectively connects the forward chamber line and the reverse chamber line to carry hydraulic fluid.

[0009] In some exemplary embodiments, the storage line may comprise: a first storage line connecting the first main cylinder chamber and the first reservoir; a second storage line connecting the second main cylinder chamber to the second reservoir; and a second storage valve designed to open / close the second storage line.

[0010] In some exemplary embodiments, the wheel cylinder may comprise: a first wheel cylinder configured to supply a braking force to the front wheels, wherein the forward chamber line may be connected to the first wheel cylinder; and a second wheel cylinder configured to supply a first braking force to the rear wheels, wherein the reverse chamber line may be connected to the second wheel cylinder.

[0011] In some exemplary embodiments, the electronic hydraulic brake device may further comprise a forward chamber collecting device which connects the forward chamber line and the first reservoir to convey hydraulic fluid, and a reverse chamber collecting device which connects the reverse chamber line and the second reservoir to convey hydraulic fluid.

[0012] According to the invention, the forward chamber line comprises: a first forward chamber line connecting the first main cylinder chamber and the forward chamber; a first forward chamber valve configured to open / close the first forward chamber line; a second forward chamber line connected to the first forward chamber line; a second forward chamber valve configured to open / close the second forward chamber line; a third forward chamber line connected to the second forward chamber line and a first cylinder of the first wheel cylinder; and a third forward chamber valve configured to open / close the third forward chamber line.In some exemplary embodiments, the forward chamber line may further comprise: a fourth forward chamber line connected to the second forward chamber line and a second cylinder of the first wheel cylinder; a fourth forward chamber valve configured to open / close the fourth forward chamber line; a fifth forward chamber line connecting the first reservoir and the second forward chamber line; and a fifth forward chamber valve configured to open / close the fifth forward chamber line.

[0013] In some exemplary embodiments, the first forward chamber valve, the second forward chamber valve, the third forward chamber valve and the fourth forward chamber valve can be normally open valves, and the fifth forward chamber valve can be a normally closed valve.In some exemplary embodiments, the forward chamber collecting device may include: a third forward chamber collecting line connected to the third forward chamber line; a third forward chamber collecting valve configured to open / close the third forward chamber collecting line; a fourth forward chamber collecting line connected to the fourth forward chamber line; a fourth forward chamber collecting valve configured to open / close the fourth forward chamber collecting line; a fifth forward chamber collecting line connecting the third forward chamber collecting line and the fourth forward chamber collecting line; and a sixth forward chamber collecting line connecting the fifth forward chamber collecting line and the first reservoir.

[0014] In some exemplary embodiments, the third forward chamber manifold and the fourth forward chamber manifold can be normally closed valves.

[0015] In some exemplary embodiments, the reverse chamber line may comprise: a first reverse chamber line connecting the second main cylinder chamber and the reverse chamber; a first reverse chamber valve configured to open / close the first reverse chamber line; a second reverse chamber line connected to the first reverse chamber line; a second reverse chamber valve configured to open / close the second reverse chamber line; a third reverse chamber line connected to the second reverse chamber line and a first cylinder of the second wheel cylinder; a third reverse chamber valve configured to open / close the third reverse chamber line; a fourth reverse chamber line connected to the second reverse chamber line and a second cylinder of the second wheel cylinder;a fourth reverse chamber valve designed to open / close the fourth reverse chamber line.

[0016] In some exemplary embodiments, the first reverse chamber valve, the second reverse chamber valve, the third reverse chamber valve and the fourth reverse chamber valve can normally be open valves.

[0017] In some exemplary embodiments, the reverse chamber collecting device may include: a third reverse chamber collecting line connected to the third reverse chamber line; a third reverse chamber collecting valve configured to open / close the third reverse chamber collecting line; a fourth reverse chamber collecting line connected to the fourth reverse chamber line; a fourth reverse chamber collecting valve configured to open / close the fourth reverse chamber collecting line; a fifth reverse chamber collecting line connecting the third reverse chamber collecting line and the fourth reverse chamber collecting line; and a sixth reverse chamber collecting line connecting the fifth reverse chamber collecting line and the second reservoir.

[0018] In some exemplary embodiments, the third reverse chamber manifold and the fourth reverse chamber manifold can be normally closed valves.

[0019] In some exemplary embodiments, the connector may include a connecting line and a connecting valve. The connecting line may have: a first end connected to the forward chamber line and configured to convey hydraulic fluid between the electric master cylinder and the first wheel cylinder; and a second end connected to the reverse chamber line and configured to convey hydraulic fluid between the electric master cylinder and the second wheel cylinder. The connecting valve may be configured to open / close the connecting line.

[0020] In some exemplary embodiments, the connecting valve can be a normally closed valve.

[0021] In an electronic hydraulic brake device according to various exemplary embodiments, a forward chamber designed in the forward direction of a double-acting piston can be connected to a first reservoir, thereby reducing the number of valves operating during general braking. Furthermore, the forward chamber and the first wheel cylinder can be interconnected to improve brake response.

[0022] Both the preceding general description and the following detailed description are exemplary and explanatory and are intended to provide a further explanation of the claimed invention. Brief description of the drawings

[0023] The accompanying drawings, which are included for a further understanding of the invention concepts and are incorporated into and form part of the present description, show exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention. Fig. Figure 1 is a diagram for the schematic representation of an electronic hydraulic brake device according to some exemplary embodiments. Fig. 2 is a diagram for the schematic representation of a first amplification state in the electronic hydraulic brake device of Fig. 1 after some exemplary embodiments. Fig. Figure 3 is a diagram schematically representing a second amplification state in the electronic hydraulic brake device of Fig. 1 after some exemplary embodiments. Fig. 4 is a diagram schematically representing a braking state caused by pedal pressure in the electronic hydraulic braking device of Fig. 1 after some exemplary embodiments. Detailed description of the illustrated exemplary embodiments

[0024] For the purpose of clarification, numerous specific details are provided in the following description to convey a thorough understanding of the various exemplary embodiments. The terms "embodiments" and "implementations" used herein are synonymous and are non-limiting examples that employ one or more of the invention concepts disclosed herein. It is evident, however, that various exemplary embodiments are practically feasible without these specific details or with one or more equivalent arrangements. In other cases, known structures and devices are presented in block diagram form to avoid unnecessary ambiguity regarding the various exemplary embodiments. Furthermore, different embodiments may differ but need not be mutually exclusive.For example, specific shapes, configurations and characteristics of one exemplary embodiment can be used or implemented in another exemplary embodiment without departing from the invention concepts.

[0025] Unless otherwise stated, the illustrated exemplary embodiments are to be understood as providing exemplary features with varying levels of detail of several exemplary embodiments. Therefore, unless otherwise stated, the features, components, modules, layers, films, plates, areas, aspects, etc. (hereinafter referred to individually or collectively as an "element" or "elements") of the various illustrations can be combined, separated, exchanged, and / or rearranged differently without departing from the inventive concepts.

[0026] The use of cross-hatching and / or shading in the accompanying drawings generally serves to clarify boundaries between adjacent elements. As such, neither the presence nor the absence of cross-hatching or shading conveys or indicates any preference or requirement for specific materials, material properties, dimensions, proportions, commonalities between depicted elements, and / or any other characteristic, attribute, property, etc., of the element, unless otherwise specified. Furthermore, the size and relative dimensions of elements may be exaggerated in the accompanying drawings for clarity and descriptive purposes. As such, the sizes and relative dimensions of the respective elements are not necessarily limited to those shown in the drawings.If an exemplary embodiment can be implemented differently, a specific process sequence can be performed differently than the one described. For example, two processes described sequentially can be performed essentially simultaneously or in a reverse order to the one described. Furthermore, identical reference symbols denote identical elements.

[0027] When an element, such as a layer, is described as "on," "connected to," or "coupled with" another element, it may be directly on top of, connected to, or coupled with the other element, or there may be interposed elements. However, when an element is described as "immediately on," "immediately connected to," or "immediately coupled with," there are no interposed elements. Other expressions and / or phrases used to describe a relationship between elements should be interpreted similarly, e.g., "between" versus "immediately between," "adjacent" versus "immediately adjacent," "on" versus "immediately on," etc. Furthermore, the term "connected" may refer to physical, electrical, and / or fluidic connections.Furthermore, the X-axis, Y-axis, and Z-axis are not limited to three axes of a rectangular coordinate system and can be interpreted more broadly. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one chosen from the group formed by X, Y, and Z” can be understood 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. In this case, the expression “and / or” includes any and all combinations of one or more of the aforementioned elements.

[0028] Although the terms "first," "second," etc., are used to describe different elements, these elements should not be restricted by these terms. These terms serve to distinguish one element from another. Thus, a first element discussed below can be referred to as a second element without departing from the framework of the doctrine of the present revelation.

[0029] Spatial reference words such as "below," "under," "deeper," "above," "upper," "over," "higher," "lateral" (e.g., as in "side wall") and the like can be used here for descriptive purposes and thus serve to describe the relationship of an element to one or more other elements as depicted in the drawings. In addition to the orientation shown in the drawings, spatial reference words should encompass different orientations of a device in use, operation, and / or manufacture. For example, if a device is inverted in the drawings, elements described as being "below" or "under" other elements or devices would then be arranged "above" the other elements or devices. Thus, the exemplary expression "under" can encompass both an arrangement above and below an element or device.Furthermore, the device may also be oriented differently (for example, rotated by 90 degrees or have a different orientation) and therefore the spatial reference descriptors used here must be interpreted accordingly.

[0030] The terminology used herein serves to describe certain embodiments and is not to be understood as restrictive. The singular forms "ein" and "der" also include the plural forms unless the context clearly indicates otherwise. Furthermore, the terms "aufweisen," "aufweisending," "umfassen," and / or "umfassend," when used in the description, indicate the presence of specified devices, integers, steps, operations, elements, and / or groups thereof, without excluding the presence or addition of one or more other devices, integers, steps, operations, elements, and / or groups thereof.It should also be noted that the terms “essentially” and “approximately” or other similar expressions, when used herein, are used as expressions of approximation and not as expressions of degree, and are employed to take account of inherent variations in measured, calculated and / or provided values ​​which would be recognized by a person of expertise in the field.

[0031] Various exemplary embodiments are described herein with reference to sectional views, isometric views, perspective views, top views, and / or exploded views, which are schematic representations of idealized exemplary embodiments and / or intermediate structures. Deviations from the shapes shown in the figures due to, for example, manufacturing processes and / or tolerances are therefore to be expected. Consequently, the exemplary embodiments disclosed herein should not be considered limited to the specific shapes of areas shown, but rather should be viewed as encompassing, for example, deviations in shape caused by the manufacturing process.As such, the areas shown in the drawings are of a schematic nature and the shapes of these areas are not intended to represent the actual shapes of areas of a device and should not be considered restrictive.

[0032] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by a person skilled in the art in the field to which this disclosure belongs. Terms as defined in commonly used dictionaries should be interpreted to have a meaning consistent with their meaning in the context of the field concerned and are not to be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0033] As is common in this field, some embodiments are described and illustrated in the accompanying drawings as functional blocks, units, and / or modules. Those skilled in the art will recognize that these blocks, units, and / or modules are physically implemented by electronic (or optical) circuits, such as logic circuits, discrete components, microprocessors, hard-wired circuits, memory elements, wiring connections, and the like, which may be formed using semiconductor-based fabrication techniques or other manufacturing technologies. When the blocks, units, and / or modules are implemented by microprocessors or similar hardware, they may be programmed and controlled by software (e.g., microcode) to perform various functions discussed herein and may optionally be controlled by firmware and / or software.It is further considered that each block, unit, and / or module may be implemented by dedicated hardware or as a combination of dedicated hardware for performing some functions and a processor (e.g., one or more programmed processors and associated circuitry) for performing other functions. Furthermore, each block, unit, and / or module of some embodiments may be physically separated into two or more interacting and discrete blocks, units, and / or modules without derogating from the scope of the inventive concept. Furthermore, the blocks, units, and / or modules of some embodiments may be physically combined to form more complex blocks, units, and / or modules without derogating from the scope of the inventive concept.

[0034] The following section describes various exemplary implementations in detail with reference to the associated drawings.

[0035] Fig. Figure 1 is a diagram schematically representing an electronic hydraulic brake device 1 according to some exemplary embodiments. Referring to Fig. 1 The electronic hydraulic brake device 1, according to some exemplary embodiments, comprises a pedal master cylinder 10, a reservoir 20, an electric master cylinder 30, a wheel cylinder 40, a storage line 50, a forward chamber line 60, a reverse chamber line 70 and a connector 100.

[0036] The pedal master cylinder 10 generates hydraulic pressure when a pedal 19 is depressed. The pedal master cylinder 10 can have a first master cylinder chamber 11 and a second master cylinder chamber 12, in which a hydraulic fluid (for example, oil) is divided and stored. Hereinafter, the hydraulic fluid is referred to as oil. The first and second master cylinder chambers 11 and 12 can each generate hydraulic pressure independently when the pedal 19 is actuated.

[0037] Reservoir 20 stores oil. Reservoir 20 can have a first reservoir 21 and a second reservoir 22, which are formed by sections of reservoir 20 and which absorb excess hydraulic pressure generated by a hydraulic system.

[0038] The electric master cylinder 30 generates hydraulic pressure. For example, in response to the actuation of the pedal 19, which is detected to operate a motor 39, hydraulic pressure is generated while a piston 38 moves back and forth in a cylinder 37. A forward chamber 31 is formed in the forward direction of movement of the piston 38, and a reverse chamber 32 is formed in the reverse direction of movement of the piston 38. Such an electric master cylinder 30 can have an effective cross-sectional area that varies according to a high-pressure section and a low-pressure section, and can thus reduce the capacity and weight of the motor 39 and ensure a relatively fast response.

[0039] The wheel cylinder 40 delivers a braking force to the front and rear wheels. For example, the wheel cylinder 40 can be configured on two front wheels and two rear wheels and deliver a braking force using hydraulic pressure.

[0040] In some exemplary embodiments, the wheel cylinder 40 has a first wheel cylinder 41 and a second wheel cylinder 42. The first wheel cylinder 41 supplies a braking force to the front wheels, and the second wheel cylinder 42 supplies a braking force to the rear wheels. For example, the first wheel cylinder 41 can have a front right wheel cylinder 411 for supplying a braking force to the right front wheel and a front left wheel cylinder 412 for supplying brake pressure to the left front wheel. The second wheel cylinder 47 can have a rear right wheel cylinder 421 for supplying a braking force to the right rear wheel and a rear left wheel cylinder 422 for supplying a braking force to the left rear wheel. The first wheel cylinder 41 can supply a braking force to any one of the front wheels and any one of the rear wheels. The second wheel cylinder 42 can supply a braking force to the other one of the front wheels and the other one of the rear wheels.

[0041] The storage line 50 connects the pedal master cylinder 10 and the reservoir 20 to supply oil. The forward chamber line 60 connects the pedal master cylinder 10, the electric master cylinder 30, and the first wheel cylinder 41 to supply oil. The reverse chamber line 70 connects the pedal master cylinder 10, the electric master cylinder 30, and the second wheel cylinder 42 to supply oil.

[0042] The connector 100 connects the forward chamber line 60 and the reverse chamber line 70 to convey oil.

[0043] The electronic hydraulic brake device 1, according to some exemplary embodiments, can further comprise a forward chamber collecting device 80 and a reverse chamber collecting device 90. The forward chamber collecting device 80 connects the forward chamber line 60 and the first reservoir 21 to convey oil, and the reverse chamber collecting device 90 connects the reverse chamber line 70 and the second reservoir 22 to convey oil.

[0044] The storage line 50, according to some exemplary embodiments, has a first storage line 51 and a second storage line 52. The first storage line 51 connects the first main cylinder chamber 11 and the first reservoir 21. The second storage line 52 connects the second main cylinder chamber 12 and the second reservoir 22. A second storage valve 521, formed on the second storage line 52, opens / closes the second storage line 52. For example, one end of the second storage line 52 is connected to the second reservoir 22, and the other end branches into two lines and is connected to the second main cylinder chamber 12. The second storage valve 521 can be arranged on any of the branching lines.

[0045] The forward chamber conduit 60 has a first forward chamber conduit 61, a second forward chamber conduit 62, a third forward chamber conduit 63, a fourth forward chamber conduit 64 and a fifth forward chamber conduit 65.

[0046] The first forward chamber line 61 connects the first main cylinder chamber 11 and the forward chamber 31, and a first forward chamber valve 611 formed on the first forward chamber line 61 opens / closes the first forward chamber line 61.

[0047] The second forward chamber line 62 is connected to the first forward chamber line 61, and a second forward chamber valve 621 formed on the second forward chamber line 62 opens / closes the second forward chamber line 62. For example, the second forward chamber line 62 can be connected to the first forward chamber line 61, which connects the first forward chamber valve 611 and the forward chamber 31.

[0048] The third forward chamber line 63 is connected to both the second forward chamber line 62 and the first wheel cylinder 41, and a third forward chamber valve 631 formed on the third forward chamber line 63 opens / closes the third forward chamber line 63. For example, the third forward chamber line 63 can branch off from the second forward chamber line 62 and be connected to the right front wheel cylinder 411.

[0049] The fourth forward chamber line 64 is connected to both the second forward chamber line 62 and the first wheel cylinder 41, and a fourth forward chamber valve 641 formed on the fourth forward chamber line 64 opens / closes the fourth forward chamber line 64. For example, the fourth forward chamber line 64 can branch off from the second forward chamber line 62 and be connected to the left front wheel cylinder 412.

[0050] The fifth forward chamber line 65 connects the first reservoir 21 and the second forward chamber line 62, and a fifth forward chamber valve 651 formed on the fifth forward chamber line 65 opens / closes the fifth forward chamber line 65. For example, one end of the fifth forward chamber line 65 can be connected to the first reservoir 21 and the other end can be connected to the second forward chamber line 62, which connects the first forward chamber line 61 and the second forward chamber valve 621.

[0051] The forward chamber line 60 may further comprise a sixth forward chamber line 66. The sixth forward chamber line 66 connects the second forward chamber line 62 and the fifth forward chamber line 65, and a sixth forward chamber valve 661 formed on the sixth forward chamber line 66 restricts the movement of the oil in one direction. For example, one end of the sixth forward chamber line 66 may be connected to the fifth forward chamber line 65, which connects the first reservoir 21 and the fifth forward chamber valve 651, and the other end may be connected to the second forward chamber line 62, which connects the first connecting chamber line 61 and the second forward chamber valve 621.

[0052] According to some exemplary embodiments, normally open valves that open the lines when no current is applied can be used as the first forward chamber valve 611, the second forward chamber valve 621, the third forward chamber valve 631, and the fourth forward chamber valve 641. Furthermore, a normally closed valve that closes the line when no current is applied can be used as the fifth forward chamber valve 651.

[0053] The forward chamber collecting device 80 according to some exemplary embodiments has a third forward chamber collecting line 83, a fourth forward chamber collecting line 84, a fifth forward chamber collecting line 85 and a sixth forward chamber collecting line 86.

[0054] The third forward chamber manifold 83 is connected to the third forward chamber manifold 63, and a third forward chamber manifold valve 831 formed on the third forward chamber manifold 83 opens / closes the third forward chamber manifold 83. For example, the third forward chamber manifold 83 can be connected to the third forward chamber manifold 63, which connects the third forward chamber valve 631 and the front right wheel cylinder 411.

[0055] The fourth forward chamber manifold 84 is connected to the fourth forward chamber manifold 64, and a fourth forward chamber manifold valve 841 formed on the fourth forward chamber manifold 84 opens / closes the fourth forward chamber manifold 84. For example, the fourth forward chamber manifold 84 can be connected to the fourth forward chamber manifold 64, which connects the fourth forward chamber valve 641 and the front left wheel cylinder 412.

[0056] The fifth forward chamber manifold 85 connects the third forward chamber manifold 83 and the fourth forward chamber manifold 84, and the sixth forward chamber manifold 86 connects the fifth forward chamber manifold 85 and the first reservoir 21. For example, the sixth forward chamber manifold 86 can be connected to the fifth forward chamber manifold 65, which connects the first reservoir 21 and the fifth forward chamber valve 651.

[0057] In some exemplary embodiments, normally closed valves that close the lines when no current is applied can be used as the third forward chamber collector valve 831 and the fourth forward chamber collector valve 841.

[0058] The reverse chamber line 70, according to some exemplary embodiments, has a first reverse chamber line 71, a second reverse chamber line 72, a third reverse chamber line 73 and a fourth reverse chamber line 74.

[0059] The first reverse chamber line 71 connects the second main cylinder chamber 12 and the reverse chamber 32, and a reverse chamber valve 711 formed on the first reverse chamber line 71 opens / closes the first reverse chamber line 71.

[0060] The second reverse chamber line 72 is connected to the first reverse chamber line 71, and a second reverse chamber valve 721 formed on the second reverse chamber line 72 opens / closes the second reverse chamber line 72. For example, the second reverse chamber line 72 can be connected to the first reverse chamber line 71, which connects the first reverse chamber valve 711 and the reverse chamber 32.

[0061] The third reverse chamber line 73 is connected to both the second reverse chamber line 72 and the second wheel cylinder 42, and a third reverse chamber valve 731 formed on the third reverse chamber line 73 opens / closes the third reverse chamber line 71. For example, the third reverse chamber line 73 can branch off from the second reverse chamber line 72 and be connected to the rear right wheel cylinder 421.

[0062] The fourth reverse chamber line 74 is connected to both the second reverse chamber line 72 and the second wheel cylinder 42, and a reverse chamber valve 741 formed on the fourth reverse chamber line 74 opens / closes the fourth reverse chamber line 74. For example, the fourth reverse chamber line 74 can branch off from the second reverse chamber line 72 and be connected to the rear left wheel cylinder 422.

[0063] The fifth reverse chamber line 75 is connected to the second reservoir 22 and the second reverse chamber line 72, and a reverse chamber valve 751 formed on the fifth reverse chamber line 75 limits the movement of the oil in one direction. For example, the fifth reverse chamber line 75 can be connected to the second reverse chamber line 72, which connects the first reverse chamber line 71 and the second reverse chamber valve 721.

[0064] According to some exemplary embodiments, normally open valves which open the lines when no current is applied can be used as the first reverse chamber valve 711, the second reverse chamber valve 731, the third reverse chamber valve 731 and the fourth reverse chamber valve 741.

[0065] The reverse chamber collecting device 90 according to some exemplary embodiments has a third reverse chamber collecting line 93, a fourth reverse chamber collecting line 94, a fifth reverse chamber collecting line 95 and a sixth reverse chamber collecting line 96.

[0066] The third reverse chamber manifold 93 is connected to the third reverse chamber manifold 73, and a third reverse chamber manifold valve 931 formed on the third reverse chamber manifold 93 opens / closes the third reverse chamber manifold 93. For example, the third reverse chamber manifold 93 can be connected to the third reverse chamber manifold 73, which connects the third reverse chamber valve 731 and the rear right wheel cylinder 421.

[0067] The fourth reverse chamber manifold 94 is connected to the fourth reverse chamber manifold 74, and a fourth reverse chamber manifold valve 941 formed on the fourth reverse chamber manifold 94 opens / closes the fourth reverse chamber manifold 94. For example, the fourth reverse chamber manifold 94 can be connected to the fourth reverse chamber manifold 74, which connects the fourth reverse chamber valve 741 and the rear left wheel cylinder 422.

[0068] The fifth reverse chamber manifold 95 connects the third reverse chamber manifold 93 and the fourth reverse chamber manifold 94, and the sixth reverse chamber manifold 96 connects the fifth reverse chamber manifold 95 and the second reservoir 22. For example, the sixth reverse chamber manifold 96 can be connected to the fifth reverse chamber manifold 75, which connects the second reservoir 22 and the fifth reverse chamber valve 751.

[0069] According to some exemplary embodiments, normally closed valves which close the lines when no current is applied can be used as the third reverse chamber manifold valve 931 and the fourth reverse chamber manifold valve 941.

[0070] The connector 100, according to some exemplary embodiments, has a connecting line 110 and a connecting valve 111.

[0071] One end of the connecting line 110 is connected to the forward chamber line 60, which carries oil between the electric master cylinder 30 and the first wheel cylinder 41, and the other end of the connecting line 110 is connected to the reverse chamber line 70, which carries oil between the electric master cylinder 30 and the second wheel cylinder 42. The connecting valve 111 is formed on the connecting line 110 to open / close the connecting line 110. According to some exemplary embodiments, a normally closed valve that closes the connecting line 110 when no current is applied can be used as the connecting valve 111. For example, the connecting line 110 can connect the second forward chamber line 62, which passes through the second forward chamber valve 621, to the second reverse chamber line 72, which passes through the second reverse chamber valve 721.

[0072] Fig. Figure 2 is a diagram schematically representing a first amplification state in the electronic hydraulic brake device according to several exemplary embodiments. Referring to Fig. 2. Current is applied to the second reverse chamber valve 721 simultaneously with an input of the pedal 19, and the second reverse chamber line 72 is closed. In this state, when the motor 39 is driven, causing the piston 38 to increase the hydraulic pressure, oil stored in the forward chamber 31 reaches the first wheel cylinder 41 and the second wheel cylinder 42 via the forward chamber line 60 and the reverse chamber line 70.

[0073] Fig. Figure 3 is a diagram schematically representing a second amplification state in the electronic hydraulic brake device according to several exemplary embodiments. In the second amplification state, which is described in Fig. As shown in Figure 3, current is applied to the second forward chamber valve 621 to close the second forward chamber line 62, current is applied to the fifth forward chamber valve 651 to open the fifth forward chamber line 65, and current is applied to the first reverse chamber valve 711 to close the first reverse chamber line 71. The current applied to the second reverse chamber valve 721 is terminated to open the second reverse chamber line 72. In this state, when the motor 39 is driven, causing the piston 38 to increase the hydraulic pressure of the reverse chamber 32, oil stored in the reverse chamber 32 reaches the second wheel cylinder 42 and the first wheel cylinder 41 through the reverse chamber line 70 and the forward chamber line 60.

[0074] Fig. Figure 4 is a diagram schematically representing a braking state caused by pedal pressure in the electronic hydraulic braking device according to some exemplary embodiments. Referring to Fig. When pedal 19 is actuated, pressurized oil is supplied from the first master cylinder chamber 11 to the first wheel cylinder 41 via the forward chamber line 60, and pressurized oil from the second master cylinder chamber 12 is supplied to the second wheel cylinder 42 via the reverse chamber line 70. In this process, the reverse chamber 32 can be pressurized by the oil supplied to the forward chamber 31, thus preventing a loss of brake pressure.

[0075] In the electronic hydraulic brake device 1 according to some exemplary embodiments, the forward chamber 31, which is designed in the forward direction of the double-acting piston 38, is connected to the first reservoir 21, making it possible to reduce the number of valves actuated during general braking. Furthermore, the forward chamber 31 and the first wheel cylinder 41 can be connected to each other to improve the brake response.

[0076] Although certain exemplary embodiments have been described herein, other embodiments and modifications are evident from this description. Accordingly, the inventive concepts are not limited to such embodiments, but rather are further defined by the extended scope of the appended claims and various obvious modifications and equivalent arrangements that are apparent to the person skilled in the art.

Claims

[1] Electronic hydraulic brake device (1) comprising: a pedal master cylinder (10) designed to generate hydraulic pressure by applying pressure to a pedal (19), wherein the pedal master cylinder (10) has a first master cylinder chamber (11) and a second master cylinder chamber (12); a reservoir (20) to store hydraulic fluid; an electric master cylinder (30) configured to generate hydraulic pressure in response to the reciprocating movement of a piston (38) in a cylinder (37) and a detected actuation of a pedal (19) to drive a motor (39), wherein the electric master cylinder (30) has a forward chamber (31) configured in a direction corresponding to the forward movement direction of the piston (38), and a reverse chamber (32) configured in a direction corresponding to the reverse movement of the piston (38); a wheel cylinder (40) designed to deliver a braking force to the front wheels and rear wheels; a storage line (50) that connects the pedal master cylinder (10) and the reservoir (20) to convey hydraulic fluid; a forward chamber line (60) which connects the first main cylinder chamber (11), the forward chamber (31) and the wheel cylinder (40) to convey hydraulic fluid; a reverse chamber line (70) which connects the second main cylinder chamber (12), the reverse chamber (32) and the wheel cylinder (40) to convey hydraulic fluid; and a connector (100) that selectively connects the forward chamber line (60) and the reverse chamber line (70) to convey hydraulic fluid; characterized by , that the reservoir (20) is divided into a first reservoir (21) and a second reservoir (22), and that the forward chamber lead (60) exhibits: a first forward chamber line (61) which connects the first main cylinder chamber (11) and the forward chamber (31); a first forward chamber valve (611) designed to open / close the first forward chamber line (61); a second forward chamber conduit (62) connected to the first forward chamber conduit (61); a second forward chamber valve (621) designed to open / close the second forward chamber line (62); a third forward chamber line (63) connected to the second forward chamber line (62) and a first cylinder of the first wheel cylinder (41); and a third forward chamber valve (631) designed to open / close the third forward chamber line (63). [2] Electronic hydraulic brake device according to claim 1, wherein the storage line (50) comprises: a first storage line (51) which connects the first main cylinder chamber (11) and the first reservoir (21); a second storage line (52) which connects the second main cylinder chamber (12) with the second reservoir (22): and a second storage valve (521) designed to open / close the second storage line (52). [3] Electronic hydraulic brake device according to claim 1, wherein the wheel cylinder (40) comprises: a first wheel cylinder (41) designed to deliver a braking force to the front wheels; and a second wheel cylinder (42) designed to supply a first braking force to the rear wheels, wherein the forward chamber line (60) is connected to the first wheel cylinder (41), and wherein the reverse chamber line (70) is connected to the second wheel cylinder (42). [4] Electronic hydraulic brake device according to claim 3, further comprising: a forward chamber collecting device (80) which connects the forward chamber line (60) and the first reservoir (21) to convey hydraulic fluid, and a reverse chamber collecting device (90) which connects the reverse chamber line (70) and the second reservoir (22) to convey hydraulic fluid. [5] Electronic hydraulic brake device according to claim 4, wherein the forward chamber line (60) further comprises: a fourth forward chamber line (64) which is connected to the second forward chamber line (62) and a second cylinder of the first wheel cylinder (41); a fourth forward chamber valve (641) designed to open / close the fourth forward chamber line (64); a fifth forward chamber line (65) which connects the first reservoir (21) and the second forward chamber line (62); and a fifth forward chamber valve (651) designed to open / close the fifth forward chamber line (65). [6] Electronic hydraulic brake device according to claim 5, wherein: the first forward chamber valve (611), the second forward chamber valve (621), the third forward chamber valve (631) and the fourth forward chamber valve (641) are normally open valves, and the fifth forward chamber valve (651) is a normally closed valve. [7] Electronic hydraulic brake device according to claim 5, wherein the forward chamber collecting device (80) comprises: a third forward chamber collector line (83) connected to the third forward chamber line (63); a third forward chamber manifold valve (831) designed to open / close the third forward chamber manifold (83); a fourth forward chamber collector line (84) connected to the fourth forward chamber line (64); a fourth forward chamber manifold valve (641) designed to open / close the fourth forward chamber manifold (64); a fifth forward chamber collector line (85) which connects the third forward chamber collector line (83) and the fourth forward chamber collector line (84); and a sixth forward chamber collector line (86) which connects the fifth forward chamber collector line (85) and the first reservoir (21). [8] Electronic hydraulic brake device according to claim 7, wherein the third forward chamber collector valve (831) and the fourth forward chamber collector valve (618411) are normally closed valves. [9] Electronic hydraulic brake device according to claim 4, wherein the reverse chamber line (70) comprises: a first reverse chamber line (71) which connects the second main cylinder chamber (12) and the reverse chamber (32); a first reverse chamber valve (711) designed to open / close the first reverse chamber line (71); a second reverse chamber line (72) connected to the first reverse chamber line (71); a second reverse chamber valve (721) designed to open / close the second reverse chamber line (72); a third reverse chamber line (73) which is connected to the second reverse chamber line (72) and a first cylinder of the second wheel cylinder (42); a third reverse chamber valve (731) designed to open / close the third reverse chamber line (73); a fourth reverse chamber line (74) which is connected to the second reverse chamber line (72) and a second cylinder of the second wheel cylinder (42); and a fourth reverse chamber valve (741) designed to open / close the fourth reverse chamber line (74). [10] Electronic hydraulic brake device according to claim 9, wherein the first reverse chamber valve (711), the second reverse chamber valve (721), the third reverse chamber valve (731) and the fourth reverse chamber valve (741) are normally open valves. [11] Electronic hydraulic brake device according to claim 9, wherein the reverse chamber collecting device (90) comprises: a third reverse chamber collector line (93) connected to the third reverse chamber line (73); a third reverse chamber manifold valve (931) designed to open / close the third reverse chamber manifold; a fourth reverse chamber collector line (94) connected to the fourth reverse chamber line (74); a fourth reverse chamber manifold valve (941) designed to open / close the fourth reverse chamber manifold (94); a fifth reverse chamber collector line (95) which connects the third reverse chamber collector line (93) and the fourth reverse chamber collector line (94); and a sixth reverse chamber collector line (96) which connects the fifth reverse chamber collector line (95) and the second reservoir (22). [12] Electronic hydraulic brake device according to claim 11, wherein the third reverse chamber collector valve (931) and the fourth reverse chamber collector valve (941) are normally closed valves. [13] Electronic hydraulic brake device according to claim 1, wherein the connector (100) comprises: a connecting line (110) which has: a first end which is connected to the forward chamber line (60) and is designed to guide hydraulic fluid between the electric master cylinder (30) and the first wheel cylinder (41); and a second end which is connected to the reverse chamber line (70) and is designed to guide hydraulic fluid between the electric master cylinder (30) and the second wheel cylinder (42); and a connecting valve (111) designed to open / close the connecting line (110). [14] Electronic hydraulic brake device according to claim 13, wherein the connecting valve (111) is a normally closed valve.

Images