Brake device for vehicle

Abstract

A brake device is provided with: a pedal section that can be pressurized; a master cylinder section in which the oil pressure is amplified by the pedal section; a storage portion connected to the master cylinder portion and in which oil is temporarily stored; a main brake part connected to the main cylinder part and supplied with oil, the main brake part being connected to a part of the plurality of wheel cylinder parts, and the main brake part being configured to supply oil for braking to the part of the plurality of wheel cylinder parts; and an auxiliary brake portion configured to connect the main brake portion and remaining wheel cylinder portions among the plurality of wheel cylinder portions, the auxiliary brake portion connected to the storage portion and configured to amplify the oil pressure by self-driving when an error occurs in the main brake portion. In the brake device according to the present disclosure, oil for braking can be supplied to a wheel cylinder portion by driving of an auxiliary brake portion when an error occurs in a main brake portion.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure relate to a braking device for a vehicle, and more particularly, to a braking device for a vehicle that can prevent an accident from occurring in an autonomous vehicle by performing auxiliary braking when a main brake malfunctions. Background Art

[0002] Generally, in a hydraulic braking device, when a driver steps on a pedal, the oil pressure is amplified by a master cylinder. The amplified oil pressure is supplied to each wheel to generate a braking force. Also, the braking pressure is provided to each wheel by the oil pressure generated by driving a motor.

[0003] In such a hydraulic braking device, a motor pump and various types of valves are mounted on a housing block, and flow paths are formed in the housing block. The hydraulic braking device is connected to each wheel. The master cylinder is connected to the flow path of the housing block through a hydraulic line.

[0004] However, in a conventional hydraulic braking device, an accident may occur because auxiliary braking is not performed when a main brake malfunctions. In particular, an autonomous vehicle has the following problem: If the motor is not driven in the main brake, vehicle braking is impossible. Thus, it is necessary to solve this problem.

[0005] The background art of the present disclosure is disclosed in Korean Patent Application Publication No. 2007-0104982 (October 30, 2007) titled "Control Apparatus For Valve In Electro-Hydraulic BrakeSystem". Summary of the Invention

[0006] Various embodiments are directed to providing a braking device for a vehicle that can prevent an accident from occurring in an autonomous vehicle by performing auxiliary braking when a main brake malfunctions.

[0007] In one embodiment, a braking device for a vehicle may include: a pedal unit that can be pressurized; a master cylinder unit in which the oil pressure is amplified by the pedal unit; a storage unit connected to the master cylinder unit and in which oil is temporarily stored; a main braking unit connected to the master cylinder unit and supplied with oil, the main braking unit being connected to some of a plurality of wheel cylinder units, and the main braking unit being configured to supply oil for braking to some of the plurality of wheel cylinder units; and an auxiliary braking unit configured to connect the main braking unit and the remaining wheel cylinder units of the plurality of wheel cylinder units, the auxiliary braking unit being connected to the storage unit and configured to amplify the oil pressure by self-driving when the main braking unit malfunctions.

[0008] The auxiliary braking unit may include: an auxiliary block unit connected to the main braking unit and the wheel cylinder unit; an auxiliary electrical unit mounted on the auxiliary block unit and driven when power is applied to the auxiliary electrical unit; an auxiliary flow path unit formed in the auxiliary block unit and configured to supply oil from the main braking unit and the storage unit to the auxiliary electrical unit; and an alternating flow path unit formed in the auxiliary block unit and configured to supply the oil discharged from the auxiliary electrical unit to the wheel cylinder unit.

[0009] The auxiliary flow path unit may include: a connection pipeline unit configured to connect the main braking unit and the auxiliary electrical unit and guide the oil supplied by the main braking unit; and a connection valve unit formed in the connection pipeline unit and configured to adjust the amount of oil passing through the connection pipeline unit by opening and closing the connection pipeline unit.

[0010] The auxiliary flow path unit may further include a reservoir connection unit configured to connect the connection pipeline unit and the storage unit.

[0011] The alternating flow path unit may include: a wheel pipeline unit configured to connect the auxiliary electrical unit and the wheel cylinder unit; and a wheel valve unit formed in the wheel pipeline unit and configured to adjust the amount of oil passing through the wheel pipeline unit.

[0012] The alternating flow path unit may further include a pressure reducing flow path unit configured to connect the auxiliary flow path unit and the alternating flow path unit and reduce the pressure of the oil.

[0013] A pump port unit may be formed in the auxiliary block unit, and the auxiliary electrical unit may be mounted on the pump port unit. The connection valve unit may be disposed above the first axis of the pump port unit.

[0014] The connection valve units may be arranged symmetrically with respect to the second axis of the pump port unit.

[0015] A pump port unit may be formed in the auxiliary block unit, and the auxiliary electrical unit may be mounted on the pump port unit. The wheel valve unit may be disposed below the first axis of the pump port unit.

[0016] The wheel valve units may be arranged symmetrically with respect to the second axis of the pump port unit.

[0017] In a braking device for a vehicle according to an embodiment of the present disclosure, when an error occurs in the main braking unit, oil for braking can be supplied to the wheel cylinder unit by driving the auxiliary braking unit. At this time, the supply of oil to the main braking unit can be blocked, and the oil stored in the storage unit can be supplied. Description of the Drawings

[0018] Figure 1 is a diagram schematically showing a braking device for a vehicle according to an embodiment of the present disclosure.

[0019] Figure 2It is a diagram schematically showing an auxiliary braking unit according to an embodiment of the present disclosure.

[0020] Figure 3 It is a diagram schematically showing an auxiliary block unit according to an embodiment of the present disclosure.

[0021] Figure 4 It is a diagram schematically showing a state in which a connection valve unit according to an embodiment of the present disclosure is installed on the auxiliary block unit.

[0022] Figure 5 It is an operation state diagram of a connection valve unit according to an embodiment of the present disclosure.

[0023] Figure 6 It is a diagram schematically showing a state in which a wheel valve unit according to an embodiment of the present disclosure is installed on the auxiliary block unit.

[0024] Figure 7 It is an operation state diagram of a wheel valve unit according to an embodiment of the present disclosure. Detailed Embodiments

[0025] Hereinafter, a braking device for a vehicle according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. In this process, for the sake of clarity and convenience of description, the thickness of the lines or the dimensions of the components shown in the drawings may be enlarged. The terms to be described below have been defined by considering their functions in the present disclosure and may be changed according to the intention or practice of the user or operator. Therefore, these terms should be defined based on the entire content of this specification.

[0026] Figure 1 It is a diagram schematically showing a braking device for a vehicle according to an embodiment of the present disclosure. Refer to Figure 1 , a braking device 1 for a vehicle according to an embodiment of the present disclosure includes a pedal unit 10, a master cylinder unit 20, a storage unit 30, a main braking unit 40, and an auxiliary braking unit 50.

[0027] The pedal unit 10 can be pressurized. For example, the pedal unit 10 may be disposed within the vehicle body and may be depressed by the driver during driving. In addition, in the autonomous driving mode, the pedal unit 10 can be pressurized.

[0028] The oil pressure within the master cylinder unit 20 can be amplified by the pedal unit 10. For example, the oil pressure stored within the master cylinder unit 20 can be amplified as the cylinder in which two chambers have been formed is pressurized while operating in conjunction with the pedal unit 10.

[0029] The storage unit 30 can be connected to the master cylinder unit 20 and can temporarily store oil. The storage unit 30 can be connected to each divided chamber of the master cylinder unit 20.

[0030] The main braking unit 40 can be connected to the master cylinder unit 20 and supplied with oil. The main braking unit 40 can be connected to some of the plurality of wheel cylinder units 100 and can supply oil for braking to the wheel cylinder units. For example, when oil with high pressure is supplied to the wheel cylinder unit 100, braking force can be generated in the front wheels or the rear wheels. The wheel cylinder units 100 can be installed on each of the two front wheels and the two rear wheels. The main braking unit 40 can supply oil to the wheel cylinder units 100 installed on one front wheel and one rear wheel. In addition, the main braking unit 40 can supply oil to the wheel cylinder units 100 installed on the two front wheels or the two rear wheels.

[0031] The auxiliary braking unit 50 can connect the main braking unit 40 and the remaining wheel cylinder units among the plurality of wheel cylinder units 100 and can be connected to the storage unit 30. When an error occurs in the main braking unit 40, the auxiliary braking unit 50 can amplify the oil pressure by self-driving.

[0032] Figure 2 is a diagram schematically showing an auxiliary braking unit according to an embodiment of the present disclosure. Refer to Figure 2 , the auxiliary braking unit 50 according to an embodiment of the present disclosure can include an auxiliary block unit 60, an auxiliary electrical unit 70, an auxiliary flow path unit 80, and an alternating flow path unit 90.

[0033] The auxiliary block unit 60 can be connected to the main braking unit 40 and the wheel cylinder units 100. For example, the auxiliary block unit 60 can be composed of a square block, which is manufactured by an extrusion molding method and undergoes a cutting process, and is made of aluminum alloy. The auxiliary block unit 60 can be installed on the vehicle body. Ports can be formed in the auxiliary block unit 60 through hole machining so that the auxiliary block unit 60 can form a space for installing the auxiliary electrical unit 70. A circuit for guiding oil (such as the auxiliary flow path unit 80 or the alternating flow path unit 90) can be formed in the auxiliary block unit 60.

[0034] The auxiliary electrical unit 70 can be installed on the auxiliary block unit 60 and is driven when power is applied to the auxiliary electrical unit 70. The auxiliary electrical unit 70 can include an auxiliary motor unit 71 and an auxiliary pump unit 72. When power is applied to the auxiliary motor unit 71, the auxiliary pump units 72 arranged on both sides of the auxiliary motor unit 71 can be driven by eccentric driving so that oil can be compressed and discharged.

[0035] The auxiliary flow path unit 80 can be formed in the auxiliary block unit 60 and can supply the oil of the main braking unit 40 and the storage unit 30 to the auxiliary electrical unit 70.

[0036] The alternating flow path unit 90 can be formed in the auxiliary block unit 60 and can supply the oil discharged by the auxiliary electrical unit 70 to the wheel cylinder units 100.

[0037] The auxiliary flow path unit 80 according to an embodiment of the present disclosure can include a connection pipeline unit 81 and a connection valve unit 82.

[0038] The connection pipeline section 81 can connect the main braking section 40 and the auxiliary electrical section 70, and can guide the oil supplied by the main braking section 40. For example, one end of each of a pair of connection pipeline sections 81 can be connected to each of a pair of first port sections 61 formed in the auxiliary block section 60. The first port section 61 can be connected to the hydraulic pipeline of the main braking section 40.

[0039] The connection valve section 82 can be formed in the connection pipeline section 81, and can adjust the amount of oil passing through the connection pipeline section 81 by opening and closing the connection pipeline section 81. For example, when an error occurs in the main braking section 40, the connection valve section 82 can block the connection pipeline section 81. Thus, the hydraulic pipeline of the main braking section 40 and the hydraulic pipeline of the auxiliary flow path section 80 can be separated.

[0040] The connection valve section 82 can include a switching valve section 821 and a pressure reducing valve section 822. The switching valve section 821 can connect or close the flow path between the main braking section 40 and the auxiliary flow path section 80. The pressure reducing valve section 822 can keep the oil passing through the connection pipeline section 81 at a set pressure.

[0041] The connection pipeline section 81 can include a first pipeline section 811 connecting the first port section 61 and the switching valve section 821, a second pipeline section 812 connecting the switching valve section 821 and the pressure reducing valve section 822, and a third pipeline section 813 connecting the pressure reducing valve section 822 and the auxiliary electrical section 70.

[0042] The auxiliary flow path section 80 according to an embodiment of the present disclosure can further include a reservoir connection section 85. The reservoir connection section 85 can connect the connection pipeline section 81 and the storage section 30. For example, the reservoir connection section 85 can be connected to a second port section 62 formed in the auxiliary block section 60. Moreover, a hydraulic pipeline for guiding oil to the storage section 30 can be connected to the second port section 62. The reservoir connection section 85 can include a first reservoir connection section 851 and a second reservoir connection section 852. One end of the first reservoir connection section 851 can be connected to the second port section 62. The second reservoir connection section 852 can branch from the first reservoir connection section 851, and both ends of the second reservoir connection section 852 can be respectively connected to the third pipeline section 813.

[0043] The alternate flow path section 90 according to an embodiment of the present disclosure can include a wheel pipeline section 91 and a wheel valve section 92.

[0044] The wheel pipeline section 91 can connect the auxiliary electrical section 70 and the wheel cylinder section 100. For example, the wheel pipeline section 91 can have one end connected to the auxiliary electrical section 70 and the other end connected to a third port section 63 formed in the auxiliary block section 60. The third port section 63 can be directly connected to the wheel cylinder section 100 through a hydraulic pipeline.

[0045] The wheel valve part 92 can be formed in the wheel pipeline part 91 and can adjust the amount of oil passing through the wheel pipeline part 91. For example, the wheel pipeline part 91 can include: a first wheel pipeline part 911 having one end connected to the auxiliary electrical part 70 and the other end connected to the wheel valve part 92; and a second wheel pipeline part 912 having one end connected to the wheel valve part 92 and the other end connected to the third port part 63.

[0046] The rotating flow path part 90 according to an embodiment of the present disclosure may further include a pressure reducing flow path part 93. The pressure reducing flow path part 93 can connect the auxiliary flow path part 80 and the wheel pipeline part 91 and reduce the pressure of the oil. For example, the pressure reducing flow path part 93 can include a first pressure reducing part 931, a second pressure reducing part 932, and a third pressure reducing part 933.

[0047] The first pressure reducing part 931 can connect a pair of wheel pipeline parts 91. For example, the first pressure reducing part 931 can connect the first wheel pipeline part 911, and each first wheel pipeline part 911 has one end connected to the auxiliary electrical part 70 and the other end connected to the wheel valve part 92.

[0048] The second pressure reducing part 932 can have one end connected to the first pressure reducing part 931 and the other end connected to the connection pipeline part 81. For example, the second pressure reducing part 932 can be connected to any one of a pair of third pipeline parts 813.

[0049] The third pressure reducing part 933 can deliver oil or block oil according to a set pressure. For example, the third pressure reducing part 933 can be arranged in the second pressure reducing part 932 and can adjust the amount of oil passing through.

[0050] When controlling each third pressure reducing part 933, the auxiliary electrical part 70 can be used in common. Moreover, by controlling the third pressure reducing part 933, oil can be connected and separated through the second port part 62, and the set pressure can be controlled.

[0051] Figure 3 FIG. schematically shows an auxiliary block part according to an embodiment of the present disclosure. Refer to Figure 2 and Figure 3, according to an embodiment of the present invention, the pump port portion 65 may be formed in the auxiliary block portion 60, and the auxiliary electrical portion 70 may be mounted on the pump port portion 65. The connection valve portion 82 may be disposed above the first axis "x" of the pump port portion 65. For example, the pump port portion 65 may include a first pump port portion 651 and a second pump port portion 652. The first pump port portion 651 may be formed on the first surface 51 corresponding to the front surface or the rear surface of the auxiliary block portion 60. The auxiliary motor portion 71 may be mounted on the first pump port portion 651. The second pump port portion 652 may be formed on the second surface 52 corresponding to one side of the auxiliary block portion 60. The auxiliary pump portion 72 may be mounted on the second pump port portion 652. The first axis "x" may refer to the midline of the second pump port portion 652 provided on both sides of the first pump port portion 651. When the connection valve portion 82 is disposed above the first axis "x", the connection pipeline portion 81 may be closer to the first port portion 61 formed on the top surface of the auxiliary block portion 60, so that the length of the hydraulic pipeline can be minimized.

[0052] The connection valve portions 82 may be arranged symmetrically with respect to the second axis "y" of the pump port portion 65. For example, the second axis "y" may be orthogonal to the first axis "x" and may refer to the midline of the first pump port portion 651. When the connection valve portions 82 are arranged symmetrically with respect to the second axis "y", the range of design variations in the existing layout can be reduced.

[0053] The wheel valve portion 92 may be disposed below the first axis "x". When the wheel valve portion 92 is disposed below the first axis "x", the layout of the hydraulic pipeline having the third port portion 63 formed on the bottom surface of the auxiliary block portion 60 can be optimized.

[0054] The wheel valve portions 92 may be arranged symmetrically with respect to the second axis "y" of the pump port portion 65. When the wheel valve portions 92 are arranged symmetrically with respect to the second axis "y", the range of design variations in the existing layout can be reduced.

[0055] Figure 4 is a diagram schematically showing a state in which a connection valve portion according to an embodiment of the present disclosure is mounted on an auxiliary block portion. Figure 5 is an operating state diagram of a connection valve portion according to an embodiment of the present disclosure. Refer to Figure 4 and Figure 5, the supply port portion 66 may be formed in the auxiliary block portion 60. The switching valve portion 821 of the connection valve portion 82 may be installed on the supply port portion 66. The supply port portion 66 may include a first supply port portion 661 formed by machining a hole from the first surface 51 and a second supply port portion 662 extending from the first supply port portion 661. The first supply port portion 661 may be connected to the second pipeline portion 812 of the connection pipeline portion 81. The second supply port portion 662 may be connected to the first pipeline portion 811 of the connection pipeline portion 81. Therefore, the control direction (in this control direction, the pressure generated by controlling the auxiliary electrical portion 70, the wheel valve portion 92, and the pressure reducing flow path portion 93 is closed by the electromagnetic force of the switching valve portion 821) and the pressure acting direction are the same as each other, which is beneficial to control and product design. Moreover, in the normally open state, since the direction in which the spring force acts to open the switching valve portion 821 and the direction through which the oil introduced from the main braking portion 40 passes are the same as each other, the resistance of the flow path can be reduced.

[0056] Figure 6 is a diagram schematically showing a state in which a wheel valve portion according to an embodiment of the present disclosure is installed on an auxiliary block portion. Figure 7 is an operation state diagram of a wheel valve portion according to an embodiment of the present disclosure. Refer to Figure 6 and Figure 7 , the wheel port portion 67 may be formed in the auxiliary block portion 60. The wheel valve portion 92 may be installed on the wheel port portion 67. The wheel port portion 67 may include a first wheel port portion 671 formed by machining a hole from the first surface 51 and a second wheel port portion 672 extending from the first wheel port portion 671. The first wheel port portion 671 may be connected to the second pipeline portion 912. The second wheel port portion 672 may be connected to the first pipeline portion 911. Therefore, normally, the pressure acting direction and the direction in which the spring force for closing the valve acts are the same as each other, which is beneficial to controlling the wheel valve portion 92. Moreover, when the oil discharged from the auxiliary electrical portion 70 passes through, the direction in which the electromagnetic force of the wheel valve portion 92 acts is the same, which is beneficial to control.

[0057] In the braking device 1 for a vehicle according to an embodiment of the present disclosure, when an error occurs in the main braking portion 40, oil for braking can be supplied to the wheel cylinder portion 100 by driving the auxiliary braking portion 50. At this time, the supply of oil to the main braking portion 40 can be blocked, and the oil stored in the storage portion 30 can be supplied.

[0058] Although the exemplary embodiments of the present disclosure have been disclosed for illustrative purposes, those skilled in the art will recognize that various modifications, additions, and substitutions can be made without departing from the scope and spirit of the present disclosure.

Claims

1. A braking device for a vehicle, comprising: a pedal portion, the pedal portion being capable of being pressurized; a master cylinder portion in which oil pressure is amplified by the pedal portion; a storage portion connected to the master cylinder portion and in which oil is temporarily stored; a main brake portion connected to the master cylinder portion and supplied with oil, the main brake portion being connected to some of the plurality of wheel cylinder portions and configured to supply oil for braking to some of the plurality of wheel cylinder portions; as well as An auxiliary brake portion configured to connect the main brake portion and the remaining wheel cylinder portions of the plurality of wheel cylinder portions, the auxiliary brake portion being connected to the storage portion and configured to amplify oil pressure by self-driving when an error occurs in the main brake portion.

2. The braking device for a vehicle according to claim 1, wherein: The auxiliary braking unit comprises: an auxiliary block portion connected to the main brake portion and the wheel cylinder portion; an auxiliary electric part, the auxiliary electric part being mounted on the auxiliary block part and being driven when power is applied to the auxiliary electric part; an auxiliary flow channel portion formed in the auxiliary block portion and configured to supply oil of the main brake portion and the storage portion to the auxiliary electric portion; and A wheel flow path portion is formed in the auxiliary block portion and is configured to supply the wheel cylinder portion with oil discharged from the auxiliary electric portion.

3. The braking device for a vehicle according to claim 2, wherein: The auxiliary flow channel portion comprises: a connecting line portion configured to connect the main brake portion and the auxiliary electric portion and to provide guidance for oil supplied from the main brake portion; and A connection valve portion is formed in the connection line portion and is configured to adjust an amount of oil passing through the connection line portion by opening and closing the connection line portion.

4. The braking device for a vehicle according to claim 3, wherein: The auxiliary flow channel portion further includes a reservoir connecting portion configured to connect the connection line portion and the storage portion.

5. The braking device for a vehicle according to claim 2, wherein: The rotating track section comprises: a wheel line portion configured to connect the auxiliary electric portion and the wheel cylinder portion; and A wheel valve portion is formed in the wheel line portion and is configured to adjust an amount of oil passing through the wheel line portion.

6. The braking device for a vehicle according to claim 5, wherein: The wheel flow passage portion further includes a decompression passage portion configured to connect the auxiliary flow passage portion and the wheel flow passage portion and decompress the oil.

7. The braking device for a vehicle according to claim 3, wherein: A pump port portion is formed in the auxiliary block portion, the auxiliary electrical portion is mountable on the pump port portion, and The connection valve portion is arranged above a first axis of the pump port portion.

8. The braking device for a vehicle according to claim 7, wherein: The connection valve portions are arranged symmetrically to each other based on a second axis of the pump port portion.

9. The braking device for a vehicle according to claim 5, wherein: A pump port portion is formed in the auxiliary block portion, the auxiliary electrical portion is mountable on the pump port portion, and The wheel valve portion is disposed below a first axis of the pump port portion.

10. The braking device for a vehicle according to claim 9, wherein: The wheel valve portions are arranged symmetrically to each other based on a second axis of the pump port portion.

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