Electro-hydraulic brake device

Abstract

The present application proposes an electro-hydraulic brake device including a main brake unit configured to supply brake fluid to a plurality of wheel cylinders through a driving motor, a storage unit connected to the main brake unit and configured to store the brake fluid, and an auxiliary brake unit configured to supply the brake fluid to one or more of the wheel cylinders when an operation failure of the main brake unit occurs, and configured to physically divide a hydraulic line of a hydraulic circuit unit provided at a block unit into functions, wherein the hydraulic circuit unit provided at the block unit is connected to the main brake unit and the storage unit, thereby stably performing vehicle braking through the auxiliary brake unit even when the operation failure of the main brake unit occurs.

Description

Technical Field

[0001] Exemplary embodiments of this disclosure relate to an electro-hydraulic braking device, and more specifically, to an electro-hydraulic braking device in which auxiliary braking is rapidly executed in the event of a main braking failure, the hydraulic circuits are clearly distinguished for each function, the set pressure control routes are diversified, and exhaust quality is improved. Background Technology

[0002] Typically, after the driver's pedal pressure is detected by sensors, the electro-hydraulic braking system controls the braking pressure of each wheel by using the hydraulic pressure of the master cylinder driven by a motor.

[0003] Electro-hydraulic braking systems include sensors that detect the pedal travel distance to determine the braking pressure required by the driver.

[0004] In addition, the electro-hydraulic braking system includes a pedal travel simulator so that the driver feels the same pedal pressure as a typical hydraulic braking system.

[0005] Therefore, when the driver presses the pedal, the electronic control unit detects the pedal pressure and provides hydraulic pressure to the master cylinder.

[0006] In addition, the master cylinder provides brake hydraulic pressure to the wheel cylinders of each wheel to provide braking force to each wheel.

[0007] In related electro-hydraulic braking devices, when the motor fails, the brake hydraulic pressure cannot be quickly supplied to the wheel cylinders. This poses a problem that could lead to accidents. Therefore, improvements are needed to address this issue.

[0008] The related technology disclosed herein is disclosed in Korean Patent Application No. 2007-0104982 (published on October 30, 2007, entitled "Control Device for Valve in Electro-hydraulic Braking System"). Summary of the Invention

[0009] Various embodiments relate to electro-hydraulic braking devices to solve the above-mentioned problems, and the purpose of this disclosure is to provide an electro-hydraulic braking device in which auxiliary braking is rapidly executed in the event of a main brake failure, the hydraulic circuit is clearly distinguished for each function, the set pressure control route is diversified, and the exhaust quality is improved.

[0010] In one embodiment, an electro-hydraulic braking device according to the present disclosure includes: a main braking unit configured to supply brake fluid to a plurality of wheel cylinders via a drive motor; a storage unit connected to the main braking unit and configured to store brake fluid; and an auxiliary braking unit configured to supply brake fluid to one or more of the plurality of wheel cylinders in the event of an operational failure of the main braking unit, and configured to functionally physically divide hydraulic lines of a hydraulic circuit unit, wherein the hydraulic circuit unit located at a block unit is connected to the main braking unit and the storage unit.

[0011] In one embodiment, the main braking unit may include: a pedal cylinder unit configured to generate hydraulic pressure when the pedal is depressed; a master cylinder unit configured to sense the pedal and generate hydraulic pressure via a drive motor; a first main hydraulic unit connected to the master cylinder unit and configured to direct brake fluid to some of the wheel cylinders; a second main hydraulic unit configured to connect an auxiliary braking unit to the master cylinder unit and configured to direct brake fluid to the remaining wheel cylinders; and a third main hydraulic unit configured to connect the second main hydraulic unit to the first main hydraulic unit or disconnect the second main hydraulic unit from the first main hydraulic unit.

[0012] In one embodiment, a first master hydraulic unit can direct brake fluid to wheel cylinders located on the rear wheels, and a second master hydraulic unit can direct brake fluid to wheel cylinders located on the front wheels.

[0013] In one embodiment, the first main hydraulic unit and the auxiliary braking unit can be connected to each other, allowing the brake fluid to be movable.

[0014] In one embodiment, the block unit may include: a block body unit; a main connection port disposed on the upper part of the block body unit and configured to guide the connection of the main braking unit; a storage connection port disposed on the upper part of the block body unit and configured to guide the connection of the storage unit; a wheel connection port disposed on the front part of the block body unit and configured to guide the connection of the wheel cylinder; a pump port unit disposed on the side of the block body unit and configured to guide the movement of brake fluid by means of an electric pump unit driven when electricity is applied; and one or more valve port units disposed on the block body unit and configured to guide the movement of brake fluid by means of valve units communicating with a hydraulic circuit unit and controlling the hydraulic pressure.

[0015] In one embodiment, the hydraulic circuit unit may include: a first auxiliary flow unit configured to connect the wheel cylinder to the main braking unit to control the brake fluid and configured to communicate with a first valve port unit; a second auxiliary flow unit configured to connect an electric pump unit to the first auxiliary flow unit to control the brake fluid and configured to communicate with a second valve port unit; and a third auxiliary flow unit configured to connect the first auxiliary flow unit to the electric pump unit to control the brake fluid and configured to communicate with a third valve port unit.

[0016] In one embodiment, the first auxiliary flow unit may include: 1-1 flow line configured to connect the main connection port to the main braking unit to guide brake fluid; 1-2 flow line formed on the block body unit, configured to connect the wheel connection port to the main connection port and configured to communicate with the first valve port unit; 1-3 flow line configured to connect the wheel cylinder to the wheel connection port to guide brake fluid; and a first flow valve mounted on the first valve port unit and configured to open or close the 1-2 flow line.

[0017] In one embodiment, the second auxiliary flow unit may include: a 2-1 flow line formed on the block body unit and configured to connect the pump port unit to the 1-2 flow line to guide brake fluid; and a second flow valve mounted on the second valve port unit and configured to open or close the 2-1 flow line.

[0018] In one embodiment, the second auxiliary flow unit may further include: a 2-2 flow line formed on the block body unit and configured to connect the storage connection port to the 2-1 flow line; and a 2-3 flow line configured to connect the storage unit to the storage connection port.

[0019] In one embodiment, the third auxiliary flow unit may include: a third flow line mounted on the block body unit and configured to connect the 1-2 flow lines to the pump port unit to guide brake fluid; and a third flow valve mounted on the third valve port unit and configured to open or close the third flow line.

[0020] In one embodiment, a third flow valve can open a third flow line, allowing brake fluid discharged from the electric pump unit to be supplied to the wheel cylinders.

[0021] In one embodiment, the electro-hydraulic braking device may further include a fourth auxiliary flow unit configured to connect the storage unit to the third auxiliary flow unit to control the brake fluid and to communicate with a fourth valve port unit.

[0022] In one embodiment, the fourth auxiliary flow unit may include: a fourth flow line formed on the block body unit, configured to connect the storage unit to the third auxiliary flow unit and configured to communicate with the fourth valve port unit to guide brake fluid; and a fourth flow valve mounted on the fourth valve port unit and configured to open or close the fourth flow line.

[0023] In one embodiment, the inlet portion of the pump port unit can be connected to the storage unit, and the outlet portion of the pump port unit can be located on the side of the block body unit.

[0024] In one embodiment, the inlet portion of the third valve port unit may be located at the rear of the block body unit and connected to the first auxiliary flow unit, and the outlet portion of the third valve port unit may be connected to the third auxiliary flow unit.

[0025] In one embodiment, the inlet portion of the fourth valve port unit may be located at the rear of the block body unit and connected to the storage unit, and the outlet portion of the fourth valve port unit may be connected to the third auxiliary flow unit.

[0026] In the electro-hydraulic braking device according to this disclosure, the main braking unit and the auxiliary braking unit are connected to each other by a hydraulic circuit, and the auxiliary braking unit can be activated to perform braking when the main braking unit malfunctions.

[0027] In the electro-hydraulic braking device according to this disclosure, a first auxiliary flow unit connects the wheel cylinder to the main braking unit to control the brake fluid, a second auxiliary flow unit connects the electric pump unit to the first auxiliary flow unit to control the brake fluid, and a third auxiliary flow unit connects the first auxiliary flow unit to the electric pump unit to control the brake fluid. Therefore, the hydraulic circuit can be physically divided according to function.

[0028] In the electro-hydraulic braking device according to this disclosure, the second auxiliary flow unit is connected to the storage unit, and the valve resistance to the brake fluid supplied to the electric pump unit is eliminated. Therefore, the exhaust quality can be improved. Attached Figure Description

[0029] Figure 1 This is a block diagram schematically illustrating an electro-hydraulic braking device according to an embodiment of the present disclosure.

[0030] Figure 2 This is a schematic view illustrating an electro-hydraulic braking device according to an embodiment of the present disclosure.

[0031] Figure 3 This is a perspective view schematically illustrating a block unit according to an embodiment of the present disclosure.

[0032] Figure 4 This is a schematic rear view of a block unit according to an embodiment of the present disclosure.

[0033] Figure 5 This is a schematic view illustrating a hydraulic circuit unit according to an embodiment of the present disclosure.

[0034] Figure 6 This is a schematic view showing the normal operating state of the main braking unit in an electro-hydraulic braking device according to an embodiment of the present disclosure.

[0035] Figure 7 This is a schematic view showing the two-wheel pressurization state of an auxiliary braking unit equipped with an electric pump unit according to a first embodiment of the present disclosure.

[0036] Figure 8 This is a schematic view showing the two-wheel pressurization state of the auxiliary braking unit equipped with an electric pump unit according to the second embodiment of the present disclosure.

[0037] Figure 9 This is a schematic view showing the single-wheel decompression state of the auxiliary braking unit according to an embodiment of the present disclosure.

[0038] Figure 10 This is a schematic view showing the decompression state of the two wheels of the auxiliary braking unit according to an embodiment of the present disclosure.

[0039] Figure 11 This is a schematic view showing the single-wheel boosting state of the auxiliary braking unit according to an embodiment of the present disclosure.

[0040] Figure 12 This is a schematic view showing the hydraulic control state of the auxiliary braking unit according to a first embodiment of the present disclosure.

[0041] Figure 13 This is a view schematically illustrating the hydraulic control state of the auxiliary braking unit according to a second embodiment of the present disclosure.

[0042] Figure 14 This is a schematic view showing the hydraulic control state of the auxiliary braking unit according to the third embodiment of the present disclosure.

[0043] Figure 15 This is a perspective view schematically showing the state of a hydraulic circuit unit disposed at a block unit according to an embodiment of the present disclosure.

[0044] Figure 16 This is a schematic view showing the side surface of a block body unit having a pump port unit according to an embodiment of the present disclosure.

[0045] Figure 17This is a schematic view illustrating a pump port unit disposed on a block body unit according to an embodiment of the present disclosure.

[0046] Figure 18 This is a schematic view of a third valve port unit according to an embodiment of the present disclosure.

[0047] Figure 19 This is a schematic view illustrating a fourth valve port unit according to an embodiment of the present disclosure. Detailed Implementation

[0048] In the following description, the electro-hydraulic braking device will be illustrated with reference to the accompanying drawings through various exemplary embodiments. During this process, for clarity and convenience, the thickness of lines, the dimensions of component elements, etc., may be shown in an exaggerated manner in the drawings. Furthermore, the terminology described below is defined by consideration of its function according to this disclosure and may vary according to the intent of the user or administrator or according to convention in the art. Therefore, the definitions of these terms should be stated in accordance with the details disclosed throughout this specification.

[0049] Figure 1 This is a block diagram schematically illustrating an electro-hydraulic braking device according to an embodiment of the present disclosure. (Refer to...) Figure 1 The electro-hydraulic braking device according to the embodiments of the present disclosure includes a main braking unit 1, a storage unit 2, and an auxiliary braking unit 3.

[0050] The main braking unit 1 supplies brake fluid to multiple wheel cylinders 4 via a drive motor. A storage unit 2 is connected to the main braking unit 1 and temporarily stores brake fluid. An auxiliary braking unit 3 is connected to both the main braking unit 1 and the storage unit 2 via a hydraulic circuit unit 8 located at block unit 7. In the event of a malfunction in the main braking unit 1, the auxiliary braking unit 3 supplies brake fluid to some of the wheel cylinders 4. The auxiliary braking unit 3 is designed such that the hydraulic lines of the hydraulic circuit unit 8 are physically divided according to function.

[0051] In other words, in the electro-hydraulic braking device according to the embodiments of this disclosure, when an operational failure occurs in the main braking unit 1 in an electric vehicle, hybrid vehicle, or autonomous vehicle, the auxiliary braking unit 3 can be activated for emergency braking. In this case, the operational failure of the main braking unit 1 may be a motor drive failure or an operational failure of various valves controlling the hydraulic circuit.

[0052] Figure 2 This is a schematic view illustrating an electro-hydraulic braking device according to an embodiment of the present disclosure. (Refer to...) Figure 2 According to the embodiments of the present disclosure, the main braking unit 1 includes a pedal cylinder unit 110, a master cylinder unit 120, a first main hydraulic unit 130, a second main hydraulic unit 140, and a third main hydraulic unit 150.

[0053] When pedal 119 is pressed, pedal cylinder unit 110 generates hydraulic pressure. This pedal cylinder unit 110 can form two chambers and provide pedal force corresponding to the increased pressure on pedal 119.

[0054] The master cylinder unit 120 detects whether the pedal 119 is activated and generates hydraulic pressure via the drive motor 129. The master cylinder unit 120 may form a chamber, and the motor 129 may be driven in a forward or backward direction depending on the pressurization state of the pedal 119. The master cylinder unit 120 may be connected to the pedal cylinder unit 110 via a cylinder line portion 128.

[0055] The first main hydraulic unit 130 is connected to the master cylinder unit 120 and directs brake fluid flow to some of the multiple wheel cylinders 4.

[0056] More specifically, the first master hydraulic unit 130 may include: a 1-1 hydraulic line section 131 connected to the master cylinder unit 120 and guiding brake fluid; and a 1-2 hydraulic line section 132 connected to and branching from the 1-1 hydraulic line section 131, guiding brake fluid to the first wheel cylinders 5. In this case, each of the two first wheel cylinders 5 may be arranged on the rear wheel.

[0057] The second main hydraulic unit 140 connects the auxiliary braking unit 3 to the master cylinder unit 120 and directs the braking hydraulic pressure to the remaining wheel cylinders in the plurality of wheel cylinders 4.

[0058] More specifically, the second main hydraulic unit 140 may include: a 2-1 hydraulic line section 141 connected to the master cylinder unit 120 and guiding brake hydraulic pressure; and a 2-2 hydraulic line section 142 connected to and branching from the 2-1 hydraulic line section 141, guiding brake fluid to the auxiliary braking unit 3. In this case, the auxiliary braking unit 3 may be connected to the second wheel cylinders 6, and each of the two second wheel cylinders 6 may be arranged on a front wheel and may include a first wheel section 6a and a second wheel section 6b.

[0059] In addition, the first wheel cylinder 5 can be arranged on the front wheel, the second wheel cylinder 6 can be arranged on the rear wheel, and the auxiliary braking unit 3 can be connected to the main drive wheel depending on the vehicle drive type.

[0060] The third main hydraulic unit 150 connects the second main hydraulic unit 140 to the first main hydraulic unit 130 or disconnects the second main hydraulic unit 140 from the first main hydraulic unit 130. For example, the third main hydraulic unit 150 can connect the 2-2 hydraulic line section 142 to the 1-2 hydraulic line section 132.

[0061] Figure 3 This is a perspective view schematically illustrating a block unit according to an embodiment of the present disclosure, and Figure 4 This is a schematic rear view of a block unit according to an embodiment of the present disclosure. (Refer to...) Figure 3 and Figure 4 According to the embodiments of the present disclosure, the block unit 7 includes a block body unit 50, a main connection port 61, a storage connection port 62, a wheel connection port 63, a pump port unit 70, and a valve port unit 80.

[0062] The block body unit 50 is used to provide braking force for the anti-lock braking and drive power control system. For example, the block body unit 50 can be formed into a square block made of aluminum alloy by extrusion molding and cutting processes. The block body unit 50 may include a front portion 51, a rear portion 52, an upper portion 53, a side portion 54, and a lower portion 55.

[0063] The main connection port 61 is located on the upper part 53 of the block body unit 50 and guides the connection of the main braking unit 1. For example, the main connection port 61 is arranged on the left and right edges of the upper part 53, and may be arranged behind the center line of the upper part 53 along the left and right length direction.

[0064] Storage connection port 62 is provided on the upper part 53 of block main unit 50 and guides the connection of storage unit 2. For example, storage connection port 62 is formed on the center line that spans the upper part 53 in the left-right length direction and can be arranged between main connection ports 61.

[0065] The wheel connection port 63 is located at the front 51 of the block body unit 50 and guides the connection of the wheel cylinder 4. For example, the wheel connection port 63 may be located at the upper left and right edges of the front 51.

[0066] A pump port unit 70 is located on the side 54 of the block body unit 50, and guides the movement of brake fluid via an electric pump unit 90 that is driven when electricity is applied. For example, the motor of the electric pump unit 90 is mounted on the center of the front portion 51, the pump port unit 70 is located on the side 54, and the pump of the electric pump unit 90 can be mounted thereon. Furthermore, when the electric pump unit 90 is configured as a single pump, the pump port unit 70 can be located on either side 54; when two pumps are configured, the pump port unit 70 can be located on each of the pair of sides 54; when three pumps are configured, the pump port unit 70 can be located on each of the pair of sides 54 and the lower portion 55.

[0067] One or more valve port units 80 are provided at the block body unit 50, and guide the movement of brake fluid through valve units that communicate with the hydraulic circuit unit 8 and control the hydraulic pressure. For example, the valve port units 80 are provided at the rear 52 of the block body unit 50, and can be configured as first valve port units 81 to fourth valve port units 84 depending on the type of valve unit. To ensure stable arrangement of the valve port units 80, ports for introducing and discharging brake fluid can be omitted in the rear 52.

[0068] Figure 5 This is a schematic view illustrating a hydraulic circuit unit according to an embodiment of the present disclosure. (Refer to...) Figures 2 to 5 The hydraulic circuit unit 8 according to the embodiments of the present disclosure includes a first auxiliary flow unit 10, a second auxiliary flow unit 20 and a third auxiliary flow unit 30.

[0069] The first auxiliary flow unit 10 connects the main braking unit 1 to the wheel cylinder 4 and controls the brake fluid. This first auxiliary flow unit 10 communicates with the first valve port unit 81. For example, two first auxiliary flow units 10 can be connected to the branch 2-2 hydraulic line section 142. The first auxiliary flow unit 10 can allow or block the brake fluid and can control the set pressure of the brake fluid as needed.

[0070] The second auxiliary flow unit 20 connects the first auxiliary flow unit 10 to the electric pump unit 90 and controls the brake fluid. This second auxiliary flow unit 20 communicates with the second valve port unit 82. For example, one end of the second auxiliary flow unit 20 can be connected to each part of the first auxiliary flow unit 10, and the other end of the second auxiliary flow unit 20 can be connected to the electric pump unit 90. The second auxiliary flow unit 20 can be connected to the storage unit 2. Furthermore, the electric pump unit 90 is a device that forcibly supplies brake fluid when power is applied and can supply brake fluid in the event of a failure in the main braking unit 1.

[0071] The third auxiliary flow unit 30 connects the electric pump unit 90 to the first auxiliary flow unit 10 and controls the brake fluid. This third auxiliary flow unit 30 communicates with the third valve port unit 83. For example, the third auxiliary flow unit 30 is connected to the electric pump unit 90 and branches off, or is connected to each electric pump unit 90 to guide the brake fluid discharged from the electric pump unit 90 to the first auxiliary flow unit 10.

[0072] More specifically, the first auxiliary flow unit 10 includes a 1-1 flow line 11, a 1-2 flow line 12, a 1-3 flow line 13, and a first flow valve 14.

[0073] 1-1 Flow line 11 connects the main braking unit 1 to the main connection port 61 and guides the brake fluid. For example, 1-1 flow line 11 can be connected to each of the 2-2 hydraulic line sections 142 by one end, or it can be replaced by the 2-2 hydraulic line sections 142.

[0074] The 1-2 flow line 12 is located at the block body unit 50, connecting the main connection port 61 to the wheel connection port 63 and communicating with the first valve port unit 81. For example, the 1-2 flow line 12 is located on one side of the block body unit 50 and can guide brake fluid.

[0075] The flow line 13 connects the wheel connection port 63 to the wheel cylinder 4 and guides the brake fluid. For example, the flow line 13 can be connected to each of the wheel connection ports 63 through one end and can be connected to the second wheel cylinder 6 through the other end.

[0076] A first flow valve 14 is disposed at the 1-2 flow line 12 to open or close the 1-2 flow line 12. For example, the first flow valve 14 can allow or block brake fluid after being inserted into the first valve port unit 81, and can control the set pressure of the brake fluid as needed. Furthermore, the first flow valve 14 can be arranged in the 1-2 flow line 12 formed between the main connection port 61 and the connection point of the 1-2 flow line 12, the second auxiliary flow unit 20, and the third auxiliary flow unit 30.

[0077] The second auxiliary flow unit 20 includes a flow line 21 and a second flow valve 24.

[0078] Flow line 21 is provided at block body unit 50 and guides brake fluid after connecting flow line 12 to pump port unit 70. In addition, a second flow valve 24 is formed in flow line 21 to open or close flow line 21.

[0079] For example, the 2-1 flow line 21 can supply brake fluid to the electric pump unit 90 after one end is connected to the 1-1 flow line 11 and the other end is connected to the pump port unit 70. Furthermore, the second flow valve 24 communicates with the 2-1 flow line 21 formed between the pump port unit 70 and the connection point of the 1-2 flow line 12 and the 2-1 flow line 21, and can be arranged in the second valve port unit 82. A pair of 2-1 flow lines 21 can be connected to each other, but can also be connected to the electric pump unit 90 via a single line or a separate line.

[0080] The second auxiliary flow unit 20 may also include 2-2 flow line 22 and 2-3 flow line 23.

[0081] Flow line 22 is provided at block body unit 50 and connects storage connection port 62 to flow line 21. For example, flow line 22 can be connected to flow line 21 formed between second flow valve 24 and pump port unit 70.

[0082] 2-3 Flow line 23 connects storage unit 2 to storage connection port 62. Therefore, since brake fluid from storage unit 2 is supplied directly to electric pump unit 90 without passing through a separate valve, the bleed quality can be improved.

[0083] The third auxiliary flow unit 30 includes a third flow line 31 and a third flow valve 32.

[0084] The third flow line 31 is located at the main block unit 50 and guides brake fluid after connecting the 1-2 flow lines 12 to the pump port unit 70. Furthermore, a third flow valve 32 is located at the third flow line 31 to open or close the third flow line 31.

[0085] For example, a pair of third flow lines 31 are connected to each other and guide brake fluid to flow lines 1-2, so that the electric pump unit 90 can share them. This third flow line 31 can be connected to the electric pump unit 90 via a single line or a separate line. The third flow line 31, formed between the pump port unit 70 and the connection point of the third flow line 31 and flow lines 1-2, communicates with the third valve port unit 83, and a third flow valve 32 can be arranged in the third valve port unit 83.

[0086] Furthermore, the third flow valve 32 opens the third flow line 31, allowing brake fluid discharged from the electric pump unit 90 to be supplied to the wheel cylinder 4. At this time, the second flow valve 24 can close the 2-1 flow line 21.

[0087] The auxiliary braking unit 3 according to an embodiment of the present disclosure may further include a fourth auxiliary flow unit 40. The fourth auxiliary flow unit 40 controls the brake fluid after connecting the storage unit 2 to the third auxiliary flow unit 30, and is in communication with a fourth valve port unit 84. For example, the fourth auxiliary flow unit 40 can allow or block the flow of brake fluid, and can control the set pressure of the brake fluid as needed.

[0088] More specifically, the fourth auxiliary flow unit 40 includes a fourth flow line 41 and a fourth flow valve 42.

[0089] The fourth flow line 41 guides brake fluid after connecting the storage unit 2 to the third auxiliary flow unit 30. Furthermore, a fourth flow valve 42 is provided at the fourth flow line 41 to open or close it. The fourth flow valve 42 allows brake fluid to pass through or be blocked, and can control the set pressure of the brake fluid as needed.

[0090] For example, one end of the fourth flow line 41 is connected to the third flow line 31, and the other end of the fourth flow line 41 can be directly connected to the storage unit 2 or connected to the 2-2 flow line 22 connected to the storage connection port 62. More specifically, the fourth flow line 41 is connected to the third flow line 31 formed between the electric pump unit 90 and the third flow valve 32.

[0091] Furthermore, when the fourth flow line 41 is directly connected to the storage unit 2 or directly connected to the storage connection port 62, the 2-2 flow line 22 can be connected to the fourth flow line 41. In this case, the fourth flow line 41, which is formed between the connection point of the third flow line 31 and the fourth flow line 41 and the 2-2 flow line 22, communicates with the fourth valve port unit 84, and the fourth flow valve 42 can be arranged in the fourth valve port unit 84.

[0092] Furthermore, the first valve port units 81 are arranged in a pair on the left and right sides, spaced apart from each other above the pipeline where the pump port units 70 are located. Additionally, the second valve port units 82 are arranged in a pair, close to each other on the pipeline where the pump port units 70 are located. Furthermore, the third valve port units 83 are arranged in a pair on the left and right sides, spaced apart from each other below the pipeline where the pump port units 70 are located. Finally, the fourth valve port unit 84 is arranged on the longitudinal centerline of the block body unit 50 and is formed below the third valve port units 83.

[0093] Figure 6 This is a schematic view illustrating the normal operating state of the main braking unit in an electro-hydraulic braking device according to an embodiment of the present disclosure. (Refer to...) Figure 6 In the normal state of the main braking unit 1, when the pedal 119 is pressed or the autonomous driving system requires braking, the motor 129 of the master cylinder unit 120 is driven. In this way, the hydraulic pressure generated from the master cylinder unit 120 increases, so as to supply brake fluid to the first main hydraulic unit 130 and the second main hydraulic unit 140.

[0094] Brake fluid from the first main hydraulic unit 130 is supplied to the first wheel cylinder 5, thus applying rear wheel braking. Furthermore, brake fluid from the second main hydraulic unit 140 passes through the auxiliary braking unit 3 and is supplied to the second wheel cylinder 6, thus applying front wheel braking.

[0095] In the auxiliary braking unit 3, the first flow valve 14 opens the 1-2 flow line 12, the second flow valve 24 blocks the 2-1 flow line 21, and the third flow valve 32 blocks the third flow line 31. At this time, the fourth flow valve 42 can open the fourth flow line 41.

[0096] Figure 7 This is a schematic view illustrating the two-wheel pressurization state of the auxiliary braking unit equipped with an electric pump unit according to the first embodiment of this disclosure. (Refer to...) Figure 7 In the event of an abnormal operation of the main braking unit 1, the first flow valve 14 blocks the 1-2 flow line 12, the second flow valve 24 blocks the 2-1 flow line 21, and the third flow valve 32 opens the third flow line 31. Furthermore, the fourth flow valve 42 can block the fourth flow line 41 or control the set pressure.

[0097] In the above state, when one of the pumps in the electric pump unit 90 is driven, the brake fluid discharged from the electric pump unit 90 is branched through the third flow line 31 and supplied to the second wheel cylinder 6. Therefore, front wheel braking is performed. In this case, the brake fluid in the storage unit 2 can be supplied to the electric pump unit 90 through the 2-2 flow line 22 without passing through a valve.

[0098] Figure 8 This is a schematic view illustrating the two-wheel pressurization state of the auxiliary braking unit equipped with an electric pump unit according to the second embodiment of this disclosure. (Refer to...) Figure 8 In the event of an abnormal operation of the main braking unit 1, the first flow valve 14 blocks the 1-2 flow line 12, the second flow valve 24 blocks the 2-1 flow line 21, and the third flow valve 32 opens the third flow line 31. Furthermore, the fourth flow valve 42 can block the fourth flow line 41 or control the set pressure.

[0099] In the above-described state, when the three pumps installed in the electric pump unit 90 are driven, brake fluid discharged individually from the electric pump unit 90 is supplied to each of the second wheel cylinders 6 through the third flow line 31. Therefore, front wheel braking is performed. In this case, brake fluid stored in the storage unit 2 through the 2-3 flow lines 23 can be supplied to the electric pump unit 90.

[0100] Figure 9 This is a schematic view illustrating a single-wheel decompression state of an auxiliary braking unit according to an embodiment of the present disclosure, and may also be a single-wheel decompression state of an anti-lock braking system (ABS). (Refer to...) Figure 9In the event of an abnormal operation of the main braking unit 1, the first flow valve 14 blocks the 1-2 flow line 12. Furthermore, the second flow valve 24, located at the 2-1 flow line 21 associated with the first wheel section 6a, which is a pressure-reducing target, opens the 2-1 flow line 21. Conversely, the second flow valve 24, located at the 2-1 flow line 21 associated with the second wheel section 6b, which is not a pressure-reducing target, blocks the 2-1 flow line 21.

[0101] At this time, the third flow valve 32, located at the third flow line 31 associated with the first flow section 6a which is the pressure reduction target, blocks the third flow line 31. On the other hand, the third flow valve 32, located at the third flow line associated with the second flow section 6b which is not the pressure reduction target, opens the third flow line 31. Furthermore, the fourth flow valve 42 can block the fourth flow line 41 or control the set pressure.

[0102] In the above state, the brake fluid supplied to the first wheel section 6a, which is the target of decompression, moves to the storage unit 2 sequentially through the 1-2 flow line 12, the 2-1 flow line 21, and the 2-2 flow line 22. Therefore, single-wheel decompression is performed.

[0103] Figure 10 This is a schematic view illustrating the two-wheel decompression state of an auxiliary braking unit according to an embodiment of the present disclosure, and may be the two-wheel decompression state of an ABS system. (See reference...) Figure 10 In the event of an abnormal operation of the main braking unit 1, the first flow valve 14 blocks the 1-1 flow line 12, and the second flow valve 24 opens the 2-1 flow line 21. At this time, the third flow valve 32, located at the third flow line 31 associated with the second wheel cylinder 6 which is the target for pressure reduction, blocks the third flow line 31. Furthermore, the fourth flow valve 42 can block the fourth flow line 41 or control the set pressure.

[0104] In the above state, the operation of the electric pump unit 90 stops, and the brake fluid supplied to the second wheel cylinder 6, which is the target of decompression, moves to the storage unit 2 sequentially through the 1-2 flow line 12, the 2-1 flow line 21, and the 2-2 flow line 22. Therefore, dual-wheel decompression is performed.

[0105] Figure 11 This is a schematic view illustrating a single-wheel boost state of the auxiliary braking unit according to an embodiment of the present disclosure, and may also be a single-wheel boost state of vehicle dynamic control (VDC). (Refer to...) Figure 11 A first flow valve 14, installed at the 1-2 flow line 12 connected to the second stage section 6b which is a pressurization target, blocks the 1-2 flow line 12. On the other hand, a first flow valve 14, installed at the 1-2 flow line 12 connected to the first stage section 6a which is a non-pressurization target, opens the 1-2 flow line 12.

[0106] Furthermore, a second flow valve 24, installed at the 2-1 flow line 21 associated with the second stage section 6b, which is a pressurization target, blocks the 2-1 flow line 21. On the other hand, a second flow valve 24, installed at the 2-1 flow line 21 associated with the first stage section 6a, which is not a pressurization target, opens the 2-1 flow line 21.

[0107] At this time, the third flow valve 32, located at the third flow line 31 associated with the second stage section 6b which is the target of pressurization, opens the third flow line 31. On the other hand, the third flow valve 32, located at the third flow line 31 associated with the first stage section 6a which is not the target of pressurization, blocks the third flow line 31. Furthermore, the fourth flow valve 42 can block the fourth flow line 41 or control the set pressure.

[0108] In the above state, when the electric pump unit 90 is driven, the brake fluid discharged from the electric pump unit 90 is supplied to the second wheel section 6b, which is the target of pressure boosting, through the third flow line 31. Therefore, braking is performed.

[0109] Figure 12 This is a schematic view illustrating the hydraulic control state of the auxiliary braking unit according to a first embodiment of the present disclosure. Because pedal 119 has been removed or an electric pedal is used, control interference in the auxiliary braking unit 3 does not occur even when the driver intervenes. (See reference...) Figure 12 The first flow valve 14 can control the set pressure of the brake fluid. In this case, the fourth auxiliary flow unit 40 can be omitted from the hydraulic circuit.

[0110] Figure 13 This is a schematic view illustrating the hydraulic control state of the auxiliary braking unit according to the second embodiment of this disclosure, and Figure 14 This is a schematic view showing the hydraulic control state of the auxiliary braking unit according to the third embodiment of the present disclosure. Figure 14 The hydraulic circuit that minimizes control disturbances in the auxiliary braking unit 3 when the driver intervenes and depresses pedal 119 is shown. (Refer to...) Figure 13 The first flow valve 14 can control the set pressure of the brake fluid, and the fourth flow valve 42 can also control the set pressure of the brake fluid. Furthermore, refer to... Figure 14 The first flow valve 14 can control only the opening and closing of the 1-2 flow lines 12, and the fourth flow valve 42 can control only the set pressure of the brake fluid.

[0111] Figure 15 This is a perspective view schematically showing the state of the hydraulic circuit unit located at the block unit. Figure 16This is a schematic view showing the side surface of a block body unit having a pump port unit according to an embodiment of the present disclosure, and Figure 17 This is a schematic view illustrating a pump port unit disposed at a block body unit according to an embodiment of the present disclosure. (Refer to...) Figures 15 to 17 The inlet portion 71 of the pump port unit 70 is connected to the electric pump unit 90, and the outlet portion 72 of the pump port unit 70 is provided on the side 54 of the block body unit 50.

[0112] For example, the inlet portion 71 of the pump port unit 70 can communicate with the pump mounting portion 99 on which the electric pump unit 90 is mounted, and the outlet portion 72 of the pump port unit 70 can be exposed to the outside through the side portion 54. The outlet portion 72 extends linearly from the inlet portion 71.

[0113] Figure 18 This is a schematic view illustrating a third valve port unit according to an embodiment of the present disclosure. (Refer to...) Figures 15 to 18 The inlet portion 831 of the third valve port unit 83 is located at the rear 52 of the block body unit 50 and is connected to the first auxiliary flow unit 10, while the outlet portion 832 of the third valve port unit 83 is connected to the third auxiliary flow unit 30.

[0114] For example, the inlet portion 831 of the third valve port unit 83 is exposed at the rear 52, forming a space for mounting the third flow valve 32, and the 1-2 flow line 12 can be connected to the side surface of the inlet portion 831. The third flow valve 32 is a normally closed valve to apply valve spring force in the closing direction, and during normal braking, the brake fluid can provide support force to the closed third flow valve 32 using the pressure provided at the inlet portion 831 of the third valve port unit 83. Therefore, when the third flow valve 32 is connected to the normally closed 1-2 flow line 12, leakage can be prevented by the characteristics of the valve mechanism design. Furthermore, the inlet portion 831 of the third valve port unit 83 can be connected to the outlet portion 72 of the pump port unit 70.

[0115] Figure 19 This is a schematic view illustrating a fourth valve port unit according to an embodiment of the present disclosure. (Refer to...) Figure 19 The inlet portion 841 of the fourth valve port unit 84 is located at the rear 52 of the block body unit 50 and is connected to the storage unit 2, while the outlet portion 842 of the fourth valve port unit 84 is connected to the third auxiliary flow unit 30.

[0116] For example, the inlet portion 841 of the fourth valve port unit 84 is exposed at the rear portion 52 and can form a space for installing the fourth flow valve 42, while the fourth flow line 41 connected to the side surface of the inlet portion 841 can be connected to the 2-2 flow line 22. Furthermore, the outlet portion 842 of the fourth valve port unit 84 can be connected to the outlet portion 72 of the pump port unit 70. Moreover, the fourth flow valve 42 is a normally open valve and can control the set pressure of the hydraulic line increased by the electric pump unit 90.

[0117] In the electro-hydraulic braking device according to the embodiments of the present disclosure, the main braking unit 1 and the auxiliary braking unit 3 are connected to each other through a hydraulic circuit, and when an operational failure occurs in the main braking unit 1, the auxiliary braking unit 3 can be activated to perform braking.

[0118] In the electro-hydraulic braking device according to an embodiment of the present disclosure, a first auxiliary flow unit 10 connects the wheel cylinder 4 to the main braking unit 1 to control the flow of brake fluid, a second auxiliary flow unit 20 connects the electric pump unit 90 to the first auxiliary flow unit 10 to control the flow of brake fluid, and a third auxiliary flow unit 30 connects the first auxiliary flow unit 10 to the electric pump unit 90 to control the brake fluid. Therefore, the hydraulic circuit can be physically divided according to function.

[0119] In the electro-hydraulic braking device according to an embodiment of the present disclosure, the second auxiliary flow unit 20 is connected to the storage unit 2, and valve resistance to the brake fluid supplied to the electric pump unit 90 is eliminated. Therefore, the exhaust quality can be improved.

[0120] This disclosure has been described with reference to exemplary embodiments shown in the accompanying drawings, but this is for illustrative purposes only, and those skilled in the art will understand that various modifications and other equivalent exemplary embodiments are possible.

Claims

1. An electro-hydraulic braking device, the electro-hydraulic braking device comprising: A main braking unit, configured to supply brake fluid to multiple wheel cylinders of the vehicle; A storage unit connected to the main braking unit and configured to store the brake fluid; as well as An auxiliary braking unit is configured to supply brake fluid to one or more of the plurality of wheel cylinders in the event of an operational failure of the main braking unit, and includes a block unit and a hydraulic circuit unit disposed within the block unit. The hydraulic lines of the hydraulic circuit unit are physically divided according to function, and the hydraulic circuit unit is connected to the main braking unit and the storage unit. The block unit includes: Block main unit; and One or more valve port units are disposed at the block body unit and configured to guide the flow of brake fluid through valve units in communication with the hydraulic circuit unit. The hydraulic circuit unit includes: A first auxiliary flow unit is connected to a first valve port unit and is configured to connect the wheel cylinder to the main braking unit and control the flow of the brake fluid. A second auxiliary flow unit is connected to a second valve port unit and is configured to connect an electric pump unit to the first auxiliary flow unit and control the flow of the brake fluid. A third auxiliary flow unit, connected to a third valve port unit, and configured to connect the first auxiliary flow unit to the electric pump unit and control the flow of the brake fluid; and A fourth auxiliary flow unit is configured to connect the storage unit to the third auxiliary flow unit, control the flow of the brake fluid, and communicate with a fourth valve port unit.

2. The electro-hydraulic braking device according to claim 1, wherein, The main braking unit includes: A pedal cylinder unit configured to generate a first hydraulic pressure when the driver depresses the pedal of the vehicle; A master cylinder unit, configured to detect the driver's pressing of the pedal and generate a second hydraulic pressure; A first master hydraulic unit is connected to the master cylinder unit and is configured to direct the brake fluid flow to one or more of the plurality of wheel cylinders. A second main hydraulic unit, configured to connect the auxiliary braking unit to the master cylinder unit, and configured to direct the brake fluid flow to one or more second wheel cylinders of the plurality of wheel cylinders; and A third main hydraulic unit is configured to connect the second main hydraulic unit to the first main hydraulic unit or disconnect the second main hydraulic unit from the first main hydraulic unit.

3. The electro-hydraulic braking device according to claim 2, wherein, The one or more first wheel cylinders include wheel cylinders disposed at the rear wheels of the vehicle, and The one or more second wheel cylinders include wheel cylinders located at the front wheels of the vehicle.

4. The electro-hydraulic braking device according to claim 2, wherein, The first main hydraulic unit and the auxiliary braking unit are connected to each other, so that the brake fluid can flow between the first main hydraulic unit and the auxiliary braking unit.

5. The electro-hydraulic braking device according to claim 1, wherein, The block unit further includes: A main connection port is disposed on the upper part of the block body unit and is configured to guide the connection of the main braking unit; A storage connection port is disposed on the upper part of the block body unit and configured to guide the connection of the storage unit; A wheel connection port, located at the front of the main body unit and configured to guide the connection of the wheel cylinder; and A pump port unit is disposed on the side of the block body unit and configured to guide the flow of the brake fluid via the electric pump unit.

6. The electro-hydraulic braking device according to claim 5, wherein, The first auxiliary flow unit includes: A first flow line is configured to connect the main connection port to the main braking unit and guide the flow of the brake fluid; A second flow line is disposed at the block body unit, communicates with the first valve port unit, and is configured to connect the wheel connection port to the main connection port. A third flow line, configured to connect the wheel cylinder to the wheel connection port and guide the flow of the brake fluid; and A first flow valve is disposed at the first valve port unit and configured to open or close the second flow line of the first auxiliary flow unit.

7. The electro-hydraulic braking device according to claim 6, wherein, The second auxiliary flow unit includes: A first flow line, formed on the block body unit and configured to connect the pump port unit to a second flow line to guide the flow of the brake fluid; and A second flow valve is disposed at the second valve port unit and configured to open or close the first flow line of the second auxiliary flow unit.

8. The electro-hydraulic braking device according to claim 7, wherein, The second auxiliary flow unit further includes: A second flow line is disposed at the block body unit and configured to connect the storage connection port to the first flow line of the second auxiliary flow unit; and A third flow line is configured to connect the storage unit to the storage connection port.

9. The electro-hydraulic braking device according to claim 6, wherein, The third auxiliary flow unit includes: A first flow line, disposed at the main block unit and configured to connect the second flow line of the first auxiliary flow unit to the pump port unit, and to guide the flow of the brake fluid; and A first flow valve is disposed at the third valve port unit and configured to open or close the first flow line of the third auxiliary flow unit.

10. The electro-hydraulic braking device according to claim 9, wherein, The first flow valve of the third auxiliary flow unit is configured to open the first flow line of the third auxiliary flow unit to allow the brake fluid to be discharged from the electric pump unit to the wheel cylinder.

11. The electro-hydraulic braking device according to claim 5, wherein, The fourth auxiliary flow unit includes: A fourth flow line, disposed at the main block unit, communicating with the fourth valve port unit, and configured to connect the storage unit to the third auxiliary flow unit, and configured to guide the flow of the brake fluid; and A fourth flow valve is disposed at the fourth valve port unit and configured to open or close the fourth flow line.

12. The electro-hydraulic braking device according to claim 5, wherein, The pump port unit includes: An entry portion, the entry portion being connected to the storage unit; and The outlet portion is located on the side of the main block unit.

13. The electro-hydraulic braking device according to claim 5, wherein, The third valve port unit includes: An inlet portion, wherein the inlet portion is disposed at the rear of the block body unit and connected to the first auxiliary flow unit; and The outlet section is connected to the third auxiliary flow unit.

14. The electro-hydraulic braking device according to claim 5, wherein, The fourth valve port unit includes: An entry portion, wherein the entry portion is disposed at the rear of the block body unit and connected to the storage unit; and The outlet section is connected to the third auxiliary flow unit.

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