Brake system

Abstract

The present disclosure relates to a brake system including: a first hydraulic pressure supply connected to a wheel cylinder; a second hydraulic pressure supplier connected to the wheel cylinder; a first controller configured to control the first hydraulic pressure supplier to provide the first hydraulic pressure to the wheel cylinder; and a second controller configured to control the second hydraulic pressure supplier to provide the second hydraulic pressure to the wheel cylinder. The first controller may be connected to the first power source and the wheel speed sensor and supply a first current of the first power source to the wheel speed sensor via the second controller. The second controller may be connected to the second power source and the wheel speed sensor, and allow or prevent a first current of the first power source from flowing to the wheel speed sensor, and allow or prevent a second current of the second power source from flowing to the wheel speed sensor.

Description

Technical Field

[0001] The present disclosure generally relates to an electro-hydraulic brake system. Background Art

[0002] A brake system for braking a vehicle is necessary, and various types of brake systems for braking a vehicle have been proposed for the safety of a driver and passengers.

[0003] Existing brake systems generally use a method of supplying hydraulic pressure for braking to wheel cylinders through a booster mechanically connected to the brake pedal when a driver steps on the brake pedal.

[0004] However, the market demand for various braking functions to be embodied by sensitively responding to the operating environment of the vehicle is increasing. Therefore, recently, an electronic brake system including a cylinder-piston type hydraulic supply device that receives the driver's braking intention as an electrical signal when the driver steps on the brake pedal and supplies hydraulic pressure for braking to the wheel cylinder has become popular. In addition, an electric brake system is being developed that also includes an auxiliary supply device that prevents failure of the electronically controlled hydraulic supply device (e.g., failure of the electronic control unit (ECU), failure of the motor, power cutoff, etc.). Summary of the invention

[0005] One aspect of the present invention is to provide a brake system including a hydraulic supply device and an auxiliary supply device capable of obtaining sensing information from a single sensor.

[0006] An aspect of the present invention is to provide a brake system capable of stably obtaining sensing information even when an electrical failure occurs in a hydraulic supply device or an auxiliary supply device.

[0007] Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

[0008] According to one aspect of the present disclosure, a brake system includes: a first hydraulic pressure supplier connected to a wheel cylinder of a vehicle; a second hydraulic pressure supplier connected to the wheel cylinder; a first controller configured to control the first hydraulic pressure supplier to provide a first hydraulic pressure to the wheel cylinder; and a second controller configured to control the second hydraulic pressure supplier to provide a second hydraulic pressure to the wheel cylinder. The first controller may be connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, and is configured to control a first current from the first power source to the wheel speed sensor via the second controller. The second controller may be connected to a second power source of the vehicle and the wheel speed sensor, and is configured to allow or prevent the first current of the first power source from flowing to the wheel speed sensor, and to allow or prevent the second current of the second power source from flowing to the wheel speed sensor.

[0009] The first controller may include: a first current sensor configured to output a first current signal corresponding to the first current; and a first processor configured to identify the wheel speed of the vehicle based on the first current signal. The second controller may include: a first switch configured to allow or prevent the first current of the first power source from flowing to the wheel speed sensor; a second switch configured to allow or prevent the second current of the second power source from flowing to the wheel speed sensor; a second current sensor configured to output a second current signal corresponding to the second current; and a second processor configured to control the first switch and the second switch and identify the wheel speed of the vehicle based on the second current signal.

[0010] The first switch may be connected in series to the first current sensor between the first controller and the wheel speed sensor. The second switch may be connected in series to the second current sensor between the second power source and the wheel speed sensor.

[0011] The first processor may provide a periodic signal to the second processor based on recognizing that the first hydraulic pressure supplier is in a normal state. Based on receiving the periodic signal from the first processor, the second processor may control the second switch to allow the first current to flow to the wheel speed sensor, and control the second switch to prevent the second current from flowing to the wheel speed sensor.

[0012] Based on recognizing that the first hydraulic pressure supplier is in a fault state, the first processor may not provide a periodic signal to the second processor. Based on recognizing that no periodic signal is received from the first processor, the second processor may control the first switch to prevent the first current from flowing to the wheel speed sensor, and control the second switch to allow the second current to flow to the wheel speed sensor.

[0013] Based on recognizing that the first hydraulic pressure supplier is in a normal state, the first processor may provide a periodic signal to the second processor and control the first hydraulic pressure supplier according to an output signal from a pedal sensor of the vehicle. Based on recognizing that no periodic signal is received from the first processor, the second processor may control the second hydraulic pressure supplier according to an output signal from the pedal sensor of the vehicle.

[0014] The second controller may further include a diode disposed between a ground of the second controller and the first controller and configured to block current from flowing from the first controller to the ground of the second controller.

[0015] According to one aspect of the present disclosure, a brake system includes: a first hydraulic pressure supplier connected to a wheel cylinder of a vehicle; a second hydraulic pressure supplier connected to the wheel cylinder; a first controller configured to control the first hydraulic pressure supplier to provide a first hydraulic pressure to the wheel cylinder; and a second controller configured to control the second hydraulic pressure supplier to provide a second hydraulic pressure to the wheel cylinder. The first controller may be connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, and is configured to allow or prevent a first current of the first power source from flowing to the wheel speed sensor via the second controller. The second controller may be connected to a second power source of the vehicle and the wheel speed sensor, and is configured to allow or prevent a second current of the second power source from flowing to the wheel speed sensor.

[0016] The first controller may include: a first switch configured to allow or prevent the first current of the first power source from flowing to the wheel speed sensor via the second controller; a first current sensor configured to output a first current signal corresponding to the first current; and a first processor configured to control the first switch and identify the wheel speed of the vehicle based on the first current signal. The second controller may include: a second switch configured to allow or prevent the second current of the second power source from flowing to the wheel speed sensor; a second current sensor configured to output a second current signal corresponding to the second current; and a second processor configured to identify the wheel speed of the vehicle based on the second current signal.

[0017] The first switch may be connected in series to the first current sensor between the first power source and the second controller. The second switch may be connected in series to the second current sensor between the second power source and the wheel speed sensor.

[0018] Based on recognizing that the first hydraulic pressure supplier is in a normal state, the first processor can control the first switch to provide a periodic signal to the second processor and allow the first current to flow to the wheel speed sensor. Based on receiving the periodic signal from the first processor, the second processor can control the second switch to prevent the second current from flowing to the wheel speed sensor.

[0019] Based on recognizing that the first hydraulic pressure supplier is in a fault state, the first processor may control the first switch to not provide a periodic signal to the second processor and prevent the first current from flowing to the wheel speed sensor. Based on recognizing that no periodic signal is received from the first processor, the second processor may control the second switch to allow the second current to flow to the wheel speed sensor.

[0020] Based on recognizing that the first hydraulic pressure supplier is in a normal state, the first processor may provide a periodic signal to the second processor and control the first hydraulic pressure supplier according to an output signal from a pedal sensor of the vehicle. Based on recognizing that no periodic signal is received from the first processor, the second processor may control the second hydraulic pressure supplier according to an output signal from the pedal sensor of the vehicle.

[0021] The second controller may further include a diode disposed between a ground of the second controller and the first controller and configured to block current from flowing from the first controller to the ground of the second controller.

[0022] According to one aspect of the present disclosure, a brake system includes: a first hydraulic pressure supplier connected to a wheel cylinder of a vehicle; a second hydraulic pressure supplier connected to the wheel cylinder; a first controller configured to control the first hydraulic pressure supplier to provide a first hydraulic pressure to the wheel cylinder; and a second controller configured to control the second hydraulic pressure supplier to provide a second hydraulic pressure to the wheel cylinder. The first controller may be connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, and is configured to allow or prevent a first current of the first power source from flowing to the wheel speed sensor. The second controller may be connected to a second power source of the vehicle and the wheel speed sensor, and is configured to allow or prevent a second current of the second power source from flowing to the wheel speed sensor.

[0023] The first controller may include: a first switch configured to allow or prevent the first current of the first power source from flowing to the wheel speed sensor; a first current sensor configured to output a first current signal corresponding to the first current; and a first processor configured to control the first switch and identify the wheel speed of the vehicle based on the first current signal. The second controller includes: a second switch configured to allow or prevent the second current of the second power source from flowing to the wheel speed sensor; a second current sensor configured to output a second current signal corresponding to the second current; and a second processor configured to identify the wheel speed of the vehicle based on the second current signal.

[0024] The first switch may be connected in series to the first current sensor between the first power source and the wheel speed sensor. The second switch may be connected in series to the second current sensor between the second power source and the wheel speed sensor.

[0025] Based on recognizing that the first hydraulic pressure supplier is in a normal state, the first processor can provide a periodic signal to the second processor and control the first switch to allow the first current to flow to the wheel speed sensor. Based on receiving the periodic signal from the first processor, the second processor can control the second switch to prevent the second current from flowing to the wheel speed sensor.

[0026] Based on recognizing that the first hydraulic pressure supplier is in a fault state, the first processor may not provide a periodic signal to the second processor and control the first switch to prevent the first current from flowing to the wheel speed sensor. Based on recognizing that no periodic signal is received from the first processor, the second processor may control the second switch to allow the second current to flow to the wheel speed sensor.

[0027] Based on recognizing that the first hydraulic pressure supplier is in a normal state, the first processor may provide a periodic signal to the second processor and control the first hydraulic pressure supplier according to an output signal from a pedal sensor of the vehicle. Based on recognizing that no periodic signal is received from the first processor, the second processor may control the second hydraulic pressure supplier according to an output signal from the pedal sensor of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] These and / or other aspects of the present disclosure will become apparent and more easily understood through the following description of embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 is a conceptual diagram showing a configuration of a vehicle according to an embodiment of the present disclosure;

[0030] Figure 2 is a conceptual diagram showing a configuration of a brake system according to another embodiment of the present disclosure;

[0031] Figure 3 is a conceptual diagram showing a configuration of a brake system according to still another embodiment of the present disclosure;

[0032] Figure 4 is a block diagram showing the configuration of a first controller and a second controller included in a braking system according to an embodiment of the present disclosure;

[0033] Figure 5 is a block diagram showing connections between a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure;

[0034] Figure 6 is a block diagram showing connections between a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure;

[0035] Figure 7 is a block diagram showing connections between a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure;

[0036] Figure 8is a block diagram showing connections between a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure; and

[0037] Fig. 9 is a block diagram illustrating connections among a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, apparatuses, and / or systems described herein. Therefore, various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will be suggested to those of ordinary skill in the art. The progression of processing operations described is an example; however, the order of operations and / or operations is not limited to the order set forth herein, and may be changed as known in the art, except that the operations must occur in a particular order. In addition, for greater clarity and conciseness, the corresponding descriptions of well-known functions and structures may be omitted.

[0039] In addition, exemplary embodiments will now be described more fully below with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. These embodiments are provided to make this disclosure comprehensive and complete and to fully convey the exemplary embodiments to those of ordinary skill in the art. The same reference numerals represent the same elements throughout.

[0040] It should be understood that although the terms first, second, etc. can be used here to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. As used herein, the term "and / or" includes any and all combinations of one or more associated listed items.

[0041] It should be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be intermediate elements. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intermediate elements.

[0042] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0043] The expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0044] Reference will now be made in detail to the exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

[0045] Figure 1 is a conceptual diagram showing a configuration of a vehicle according to an embodiment of the present disclosure.

[0046] The vehicle 1 may include a body forming an exterior and accommodating a driver and / or luggage therein, a chassis including components of the vehicle 1 other than the body, and wheels 11 , 12 , 13 , and 14 rotating to move the vehicle 1 .

[0047] like Figure 1 As shown, the vehicle 1 may include, for example, a first wheel 11 disposed on the right front side of the vehicle 1, a second wheel 12 disposed on the left front side of the vehicle 1, a third wheel 13 disposed on the right rear side of the vehicle 1, and / or a fourth wheel 14 disposed on the left rear side of the vehicle 1. The number of wheels 11, 12, 13, and 14 is not limited to four, and the vehicle 1 may have two, three, or more than four wheels.

[0048] Each wheel 11, 12, 13, and 14 may be provided with a disc coupled to the corresponding wheel 11, 12, 13, and 14 and rotated together with the wheel 11, 12, 13, and 14. In addition, each wheel 11, 12, 13, and 14 may be provided with a brake caliper that interferes with the rotation of the disc by using friction. Due to the friction between the brake pad included in the brake caliper and the disc, the wheels 11, 12, 13, and 14 and the disc may be braked or stopped from rotating.

[0049] In the brake caliper, wheel cylinders 21, 22, 23 and 24 may be provided, which contain a pressurized medium such as brake oil to move the brake pad so that the brake pad presses the disc using the pressure of the pressurized medium (hereinafter, referred to as "hydraulic pressure").

[0050] For example, a first wheel cylinder 21 is installed in the first wheel 11, a second wheel cylinder 22 is installed in the second wheel 12, a third wheel cylinder 23 is installed in the third wheel 13, and a fourth wheel cylinder 24 is installed in the fourth wheel 14. The number of wheel cylinders 21, 22, 23, and 24 is not limited to four, and the vehicle 1 may have two, three, or more than four wheel cylinders.

[0051] The brake caliper may include parking brakes 31 and 32 for moving the brake pads by using electro-mechanical force without any hydraulic pressure so that the brake pads press the discs. For example, the brake calipers associated with the third wheel 13 and the fourth wheel 14 disposed at the rear of the vehicle 1 may be provided with a first parking brake 31 and a second parking brake 32, respectively.

[0052] Each of the first parking brake 31 and the second parking brake 32 may include a motor having a rotatable shaft and a spindle configured to be linearly movable according to rotation of the rotatable shaft of the motor. Through the linear movement of the spindle, the brake pad may be linearly moved to press the disc.

[0053] Each of the first parking brake 31 and the second parking brake 32 can move the brake pad toward the disc in response to the parking brake application signal. In addition, each of the first parking brake 31 and the second parking brake 32 can separate or move the brake pad away from the disc in response to the parking brake release signal.

[0054] In addition, the vehicle 1 may further include a brake pedal 50 for obtaining a driver's braking intention, and first and second hydraulic supply devices 100 and 200 for supplying pressurized medium to the wheel cylinders 21 , 22 , 23 and 24 to brake the wheels 11 , 12 , 13 and 14 .

[0055] The first hydraulic pressure supply device 100 may generate pressure of a pressurized medium (hereinafter referred to as "hydraulic pressure") for braking the wheels 11, 12, 13, and 14. The first hydraulic pressure supply device 100 may generate the hydraulic pressure based on the driver's intention to brake through the brake pedal 50 or a control signal for controlling braking, and distribute the generated hydraulic pressure to the wheel cylinders 21, 22, 23, and 24. The internal pressures of the wheel cylinders 21, 22, 23, and 24 may depend on the hydraulic pressure provided from the first hydraulic pressure supply device 100. The wheels 11, 12, 13, and 14 may be braked respectively according to the internal pressures of the wheel cylinders 21, 22, 23, and 24.

[0056] The first hydraulic supply device 100 may include: a first hydraulic supplier 150 configured to provide hydraulic pressure to the wheel cylinders 21, 22, 23, and 24; and a first controller 110 configured to control the first hydraulic supplier 150. The first controller 110 may control the first hydraulic supplier 150 to provide and / or distribute hydraulic pressure to the wheel cylinders 21, 22, 23, and 24 based on the driver's intention to brake through the brake pedal 50 or a control signal for controlling braking. For example, the first controller 110 may be implemented with one or more memories configured to store computer executable instructions and / or one or more processors configured to execute computer executable instructions stored in the memories.

[0057] The second hydraulic pressure supply device 200 may be provided on a connection flow path connecting the first hydraulic pressure supply device 100 to some of the wheel cylinders 21, 22, 23, and 24, and generates hydraulic pressure for braking some of the wheels 11, 12, 13, and 14. Figure 1As shown, the second hydraulic pressure supply device 200 may be provided on a connection flow path connecting the first hydraulic pressure supply device 100 to the first wheel cylinder 21 and the second wheel cylinder 22 , and generates hydraulic pressure for braking the first wheel 11 and the second wheel 12 .

[0058] The second hydraulic supply device 200 may be pre-set or additionally set relative to the first hydraulic supply device 100. For example, the second hydraulic supply device 200 may be deactivated while the first hydraulic supply device 100 is operating normally. In addition, when the operation of the first hydraulic supply device 100 is in an abnormal or faulty state (for example, the power supply to the first hydraulic supply device 100 is cut off or the first hydraulic supply device 100 fails), the second hydraulic supply device 200 may generate hydraulic pressure instead of the first hydraulic supply device 100.

[0059] The second hydraulic pressure supply device 200 may generate hydraulic pressure based on the driver's intention to brake through the brake pedal 50 or a control signal for controlling braking, and distribute the generated hydraulic pressure to some of the wheel cylinders 21, 22, 23, and 24. For example, the second hydraulic pressure supply device 200 may supply hydraulic pressure to the first wheel cylinder 21 and the second wheel cylinder 22.

[0060] The second hydraulic supply device 200 may include: a second hydraulic supplier 250 configured to provide hydraulic pressure to the first wheel cylinder 21 and the second wheel cylinder 22; and a second controller 210 configured to control the second hydraulic supplier 250. The second controller 210 may control the second hydraulic supplier 250 to provide and / or distribute hydraulic pressure to some of the wheel cylinders 21, 22, 23, and 24 based on the driver's intention to brake through the brake pedal 50. For example, the second controller 210 may be implemented with one or more memories configured to store computer executable instructions and / or one or more processors configured to execute computer executable instructions stored in the memories.

[0061] The second hydraulic supply device 200 may be supplied with power from a power grid that is different or separate from another power grid of the first hydraulic supply device 100. For example, the second hydraulic supply device 200 may receive power from another power grid that is different or separate from another power grid of the first hydraulic supply device 100. Figure 1 As shown, the first hydraulic supply device 100 may receive power from the first battery B1, and the second hydraulic supply device 200 may receive power from a second battery B2 that is different from or separate from the first battery B1. As another example, the second hydraulic supply device 200 may receive power from another power grid that is different from the first hydraulic supply device 100. The first hydraulic supply device 100 may receive power from the first power grid, and the second hydraulic supply device 200 may receive power from the second power grid that is different from the first power grid.

[0062] In this way, the first hydraulic pressure supply device 100 may supply hydraulic pressure to all of the first wheel cylinder 21, the second wheel cylinder 22, the third wheel cylinder 23, and the fourth wheel cylinder 24 to brake the first wheel 11, the second wheel 12, the third wheel 13, and the fourth wheel 14. However, the second hydraulic pressure supply device 200 may supply hydraulic pressure to some wheel cylinders, such as the first wheel cylinder 21 and the second wheel cylinder 22, to brake the first wheel 11 and the second wheel 12. The first parking brake 31 and the second parking brake 32 may brake the third wheel 13 and the fourth wheel 14.

[0063] As described above, the second hydraulic supply device 200 and the parking brakes 31 and 33 may be provided in advance or additionally to prevent a malfunction of the first hydraulic supply device 100 .

[0064] Figure 2 and Figure 3 is a conceptual diagram showing a configuration of a brake system according to an embodiment of the present disclosure.

[0065] The first hydraulic supply device 100 may include a reservoir 130 , a master cylinder 140 , a first hydraulic supplier 150 , a first hydraulic controller 160 , and a first controller 110 . Figure 2 and Figure 3 One or more of the reservoir 130 , the master cylinder 140 , the first hydraulic pressure supplier 150 , the first hydraulic pressure controller 160 , and the first controller 110 may not be essential components of the first hydraulic pressure supply device 100 , and may be omitted from the first hydraulic pressure supply device 100 .

[0066] The reservoir 130 may store a medium such as brake oil. The reservoir 130 may be connected to a component that supplies or receives the medium. The reservoir 130 may be hydraulically connected to the master cylinder 140 through reservoir flow paths 131 and 132 .

[0067] The master cylinder 140 may compress and discharge the pressurized medium contained therein according to the force generated by the movement of the brake pedal 50. The master cylinder 140 may include a first master chamber 141 and a second master chamber 142 formed by a cylinder body 145. The first master chamber 141 and the second master chamber 142 may be provided with or separated by a first master piston 143 and a second master piston 144, respectively.

[0068] The first hydraulic pressure supplier 150 may provide hydraulic pressure of the pressurized medium in response to a control signal from the first controller 110 .

[0069] The first hydraulic pressure supplier 150 may include a cylinder body 155 containing a medium, a hydraulic piston 153 configured to move forward and backward within the cylinder body 155, and hydraulic chambers 151 and 152 separated by the hydraulic piston 153. One or more of the cylinder body 155, the hydraulic piston 153, and the hydraulic chambers 151 and 152 may not be essential components of the first hydraulic pressure supplier 150 and may be omitted from the first hydraulic pressure supplier 150.

[0070] When the hydraulic piston 153 moves forward and backward, hydraulic pressure may be generated in the hydraulic chambers 151 and 152. The hydraulic pressure of the hydraulic chambers 151 and 152 may be transmitted to the wheel cylinders 21, 22, 23, and 24 via the first hydraulic controller 160.

[0071] The first hydraulic supply 150 may include a hydraulic piston 153 (eg, Figure 2 The first hydraulic chamber 151 located on the left side of the hydraulic piston 153 in the embodiment of the present invention and the first hydraulic chamber 151 located behind the hydraulic piston 153 (e.g. Figure 2 The second hydraulic chamber 152 is on the right side of the hydraulic piston 153 in the hydraulic chamber.

[0072] The first hydraulic chamber 151 may be defined by the cylinder body 155 and one surface (e.g., the front surface) of the hydraulic piston 153, and the volume of the first hydraulic chamber 151 may be changed according to the movement of the hydraulic piston 153. In addition, the second hydraulic chamber 152 may be defined by the cylinder body 155 and the other surface (e.g., the rear surface) of the hydraulic piston 153, and the volume of the second hydraulic chamber 152 may be changed according to the movement of the hydraulic piston 153. The first hydraulic chamber 151 and the second hydraulic chamber 152 may be hydraulically connected to the first hydraulic controller 160 through a hydraulic flow path.

[0073] The first hydraulic supplier 150 may include a first motor 156 configured to generate or provide torque for moving the hydraulic piston 153. In addition, the first hydraulic supplier 150 may further include a power conversion unit that converts the rotation torque of the first motor 156 into the translational motion of the hydraulic piston 153.

[0074] The first hydraulic controller 160 may be provided between the first hydraulic supplier 150 and the wheel cylinders 21, 22, 23, and 24. The first hydraulic controller 160 may include, for example: a plurality of hydraulic paths or hydraulic connections extending from the first hydraulic supplier 150 to the wheel cylinders 21, 22, 23, and 24; and a first valve group in which a plurality of valves configured to selectively allow or prevent the flow of pressurized medium through the plurality of hydraulic paths are provided.

[0075] like Figure 2As shown, the first hydraulic controller 160 may control the hydraulic flow path to direct the hydraulic pressure generated by the first hydraulic supplier 150 to the wheel cylinders 21 , 22 , 23 , and 24 , or return the hydraulic pressure of the wheel cylinders 21 , 22 , 23 , and 24 to the first hydraulic supplier 150 .

[0076] For example, when the hydraulic piston 153 moves forward in response to an increase in the stroke of the brake pedal 50, the first hydraulic controller 160 may control the hydraulic flow path to guide the hydraulic pressure generated by the first hydraulic chamber 151 to the wheel cylinders 21, 22, 23, and 24. In addition, when the hydraulic piston 153 moves forward and then moves backward, the first hydraulic controller 160 may control the hydraulic flow path to guide the hydraulic pressure generated by the second hydraulic chamber 152 to the wheel cylinders 21, 22, 23, and 24.

[0077] In addition, when the hydraulic piston 153 moves rearward in response to a reduction in the stroke of the brake pedal 50, the first hydraulic controller 160 may control the hydraulic flow path to return the hydraulic pressure of the wheel cylinders 21, 22, 23, and 24 to the first hydraulic chamber 151. In addition, when the hydraulic piston 153 moves forward and then moves rearward, the first hydraulic controller 160 may control the hydraulic flow path to return the hydraulic pressure of the wheel cylinders 21, 22, 23, and 24 to the second hydraulic chamber 152.

[0078] like Figure 3 As shown, when a fault in the first hydraulic supplier 150 (e.g., a disabled state of the first hydraulic supplier 150) occurs, the first hydraulic controller 160 can control the hydraulic flow path to direct the hydraulic pressure generated by the master cylinder 140 to the wheel cylinders 21, 22, 23, and 24, or return the hydraulic pressure of the wheel cylinders 21, 22, 23, and 24 to the master cylinder 140.

[0079] For example, in response to a fault state (e.g., a disabled state) of the first hydraulic supplier 150, the first hydraulic controller 160 may control the hydraulic flow path to direct the hydraulic pressure generated in the first master chamber 141 to the first wheel cylinder 21 and the second wheel cylinder 22 when the first master piston 143 moves forward, and to direct the hydraulic pressure generated in the second master chamber 142 to the third wheel cylinder 23 and the fourth wheel cylinder 24 when the second master piston 144 moves forward.

[0080] Hereinafter, a state in which the master cylinder 140 is hydraulically connected to the wheel cylinders 21 , 22 , 23 , and 24 due to a malfunction or abnormality of the first hydraulic pressure supplier 150 is referred to as a reverse mode.

[0081] In addition, when the first hydraulic supply device 100 is not supplied with power, or when the first hydraulic supply device 100 fails or is abnormal (for example, in a disabled state), a flow path can be formed in the first hydraulic controller 160 to guide the hydraulic pressure generated by the master cylinder 140 to the wheel cylinders 21, 22, 23 and 24.

[0082] In this way, in the event that the first hydraulic pressure supplier 150 fails and in the event that the first hydraulic pressure supply device 100 fails, the brake system may be operated in the reverse mode.

[0083] The first controller 110 may include a plurality of semiconductor devices, and may be, for example, an electronic control unit (ECU). The first controller 110 may include, for example, a plurality of processors and / or a plurality of memories as described above.

[0084] The first controller 110 may receive a pedal signal indicating a user's braking intention from the pedal sensor 60. The pedal sensor 60 may detect movement of a brake pedal 50 configured to be moved by a user's intention to brake by a driver pressing the brake pedal 50, and output an electrical signal (e.g., a pedal signal) according to a moving distance and / or moving speed of the brake pedal 50. The first controller 110 may provide an electrical signal to the first hydraulic pressure supplier 150 and the first hydraulic pressure controller 160 in response to the pedal signal for supplying hydraulic pressure to the wheel cylinders 21, 22, 23, and 24 or withdrawing hydraulic pressure from the wheel cylinders 21, 22, 23, and 24.

[0085] The first controller 110 may transmit and receive data to and from the second controller 210. For example, the first controller 110 may transmit and receive data to and from the second controller 210 through an in-vehicle communication network or through a data line directly connected to the second controller 210.

[0086] In a normal state, the first controller 110 can periodically send an electrical signal to the second controller 210. However, in a fault state, the first controller 110 cannot send a periodic signal to the second controller 210, or the second controller 210 cannot receive a periodic signal from the first controller 110.

[0087] The second hydraulic pressure supply device 200 may be disposed on a flow path between the first and second wheel cylinders 21 and 22 and the first hydraulic pressure supply device 100 .

[0088] The second hydraulic supply device 200 may include a second hydraulic supplier 250, a second hydraulic controller 260, and a second controller 210. Figure 2 and Figure 3 As shown, one or more of the second hydraulic supply 250 , the second hydraulic controller 260 , and the second controller 210 may not be essential components of the second hydraulic supply device 200 , and may be omitted from the second hydraulic supply device 200 .

[0089] The second hydraulic pressure supplier 250 may provide hydraulic pressure of the pressurized medium in response to a control signal from the second controller 210 .

[0090] The second hydraulic supplier 250 may include a pump 251 configured to rotate and pump a pressurized medium and a second motor 256 configured to generate or provide torque for driving the pump 251 .

[0091] The second hydraulic controller 260 may be provided between the first and second hydraulic suppliers 150 and 250 and the first and second wheel cylinders 21 and 22. The second hydraulic controller 260 may include, for example: a plurality of hydraulic flow paths extending from the second hydraulic controller 260 to the first and second wheel cylinders 21 and 22; and a second valve group in which a plurality of valves configured to selectively allow or prevent the flow of the pressurized medium through the plurality of hydraulic flow paths are provided.

[0092] The second hydraulic controller 260 can selectively open or close the hydraulic flow path between the first hydraulic supplier 150 and the first wheel cylinder 21 and the second wheel cylinder 22. Figure 2 As shown, when the first hydraulic pressure supplier 150 is in a normal state, the second hydraulic pressure controller 260 may open the hydraulic flow path between the first hydraulic pressure supplier 150 and the first wheel cylinder 21 and the second wheel cylinder 22 to hydraulically connect the first hydraulic pressure supplier 150 and the first wheel cylinder 21 and the second wheel cylinder 22. Figure 3 As shown, when the first hydraulic supplier 150 is in a fault state, the second hydraulic controller 260 can close the hydraulic flow path between the first hydraulic supplier 150 and the first wheel cylinder 21 and the second wheel cylinder 22 to prevent the hydraulic connection between the first hydraulic supplier 150 and the first wheel cylinder 21 and the second wheel cylinder 22.

[0093] In addition, if Figure 3 As shown, when the first hydraulic supplier 150 is in a fault state, the second hydraulic controller 260 can control the hydraulic flow path to guide the hydraulic pressure generated by the second hydraulic supplier 250 to the first wheel cylinder 21 and the second wheel cylinder 22, or return the hydraulic pressure of the first wheel cylinder 21 and the second wheel cylinder 22 to the reservoir 130.

[0094] For example, in response to an increase in the stroke of brake pedal 50, second hydraulic controller 260 may control or form a hydraulic flow path to guide the hydraulic pressure provided from pump 251 to first wheel cylinder 21 and second wheel cylinder 22. In addition, in response to a decrease in the stroke of brake pedal 50, second hydraulic controller 260 may control or form a hydraulic flow path to return the hydraulic pressures of first wheel cylinder 21 and second wheel cylinder 22 to reservoir 130.

[0095] The second controller 210 may include a plurality of semiconductor devices, and may be, for example, but not limited to, an ECU. The second controller 210 may include, for example, a plurality of processors and / or a plurality of memories as described above.

[0096] The second controller 210 may transmit and receive data to and from the first controller 110. For example, the second controller 210 may transmit and receive data to and from the first controller 110 through an in-vehicle communication network or through a data line directly connected to the first controller 110.

[0097] When the first controller 110 is in a normal state, the second controller 210 may periodically receive an electrical signal from the first controller 110. The second controller 210 may identify a normal state of the first controller 110 based on the periodic signal from the first controller 110. At the same time, the second controller 210 may identify a fault state of the first controller 110 based on identifying that no electrical signal is received from the first controller 110 within a predetermined period of time.

[0098] When the first controller 110 is in a fault state, the second controller 210 may receive a pedal signal indicating a user's braking intention from the pedal sensor 60. The second controller 210 may provide an electrical signal for controlling the supply of hydraulic pressure to the first wheel cylinder 21 and the second wheel cylinder 22 to brake the first wheel 11 and the second wheel 12 to the second hydraulic pressure supplier 250 and the second hydraulic pressure controller 260 in response to the pedal signal. In addition, the second controller 210 may provide an electrical signal for braking the third wheel 13 and the fourth wheel 14 to the first parking brake 31 and the second parking brake 32 in response to the pedal signal to brake the third wheel 13 and the fourth wheel 14.

[0099] Figure 4 is a block diagram illustrating a configuration of a first controller and a second controller included in a braking system according to an embodiment of the present disclosure.

[0100] See also Figure 4 , the vehicle 1 may include a pedal sensor 60, a wheel speed sensor 70, parking brakes 31 and 32, a first hydraulic supply device 100, and a second hydraulic supply device 200. The first hydraulic supply device 100 may include a first motor 156, a first valve group 161, and a first controller 110. In addition, the second hydraulic supply device 200 may include a second motor 256, a second valve group 261, and a second controller 210. Here, one or more of the first motor 156, the first valve group 161, and the first controller 110 may not be essential components of the first hydraulic supply device 100, and may be omitted from the first hydraulic supply device 100. In addition, one or more of the second motor 256, the second valve group 261, and the second controller 210 may not be essential components of the second hydraulic supply device 200, and may be omitted from the second hydraulic supply device 200.

[0101] The pedal sensor 60 can detect the movement of the brake pedal 50 and output an electrical signal (i.e., a pedal signal) representing the movement distance and / or movement speed of the brake pedal 50 to the first controller 110 and the second controller 210, wherein the brake pedal 50 is configured to move according to the user's intention by the driver pressing the brake pedal 50.

[0102] The pedal sensor 60 may include a first pedal sensor and a second pedal sensor. Each of the first pedal sensor and the second pedal sensor may detect a moving distance and / or moving speed of the brake pedal 50, and provide an electrical signal (i.e., a first pedal signal and a second pedal signal) indicating the detected moving distance and / or moving speed to the first controller 110 and the second controller 210. The power for the first pedal sensor may be supplied by a power source different from that of the second pedal sensor (e.g., a different battery or a different power grid). For example, the first pedal sensor may obtain power from a first battery or a first power grid through the first hydraulic supply device 100, and the second pedal sensor may obtain power from a second battery or a second power grid through the second hydraulic supply device 200. Therefore, although a fault occurs in any one of the first pedal sensor and the second pedal sensor, such as a power failure or a disabled state, the first controller 110 and the second controller 210 may obtain a pedal signal from the remaining other pedal sensor and be able to recognize the driver's braking intention.

[0103] The wheel speed sensor 70 can detect the rotation of the wheels 11, 12, 13 and 14 according to the driving of the vehicle 1, and provide an electrical signal (ie, a wheel speed signal) corresponding to the rotation speed of the wheels 11, 12, 13 and 14 to the first controller 110 and the second controller 210.

[0104] Unlike the pedal sensor 60, the wheel speed sensor 70 may be provided in each of the wheels 11, 12, 13, and 14. For example, each of the four wheel speed sensors respectively provided in the four wheels 11, 12, 13, and 14 may provide a wheel speed signal to the first controller 110 and the second controller 210. For example, when the first hydraulic supply device 100 is in a fault state, the wheel speed sensor 70 may obtain power from the second hydraulic supply device 200 and provide a wheel speed signal to the second controller 210 of the second hydraulic supply device 200. In addition, when the first hydraulic supply device 100 is in a normal state, the wheel speed sensor 70 may obtain power from the first hydraulic supply device 100 and provide a wheel speed signal to the first controller 110 of the first hydraulic supply device 100.

[0105] The parking brakes 31 and 32 may be provided in some of the wheels 11, 12, 13, and 14, and brake the rotation of the wheels 11, 12, 13, and 14. For example, the parking brakes 31 and 32 may be provided in the third wheel 13 and the fourth wheel 14, and brake the rotation of the third wheel 13 and the fourth wheel 14. Each of the parking brakes 31 and 32 may include a motor, and the rotational torque provided by the motor provided in each of the parking brakes 31 and 32 may be converted into a translational motion through a spindle to move the brake pad toward the disc.

[0106] The first motor 156 may provide power (eg, torque) for generating hydraulic pressure of the pressurized medium to the cylinder block 155 and the hydraulic piston 153. The hydraulic piston 153 may be translationally moved according to the torque provided by the first motor 156.

[0107] The first valve group 161 may control a flow path of a medium extending from the first hydraulic pressure supplier 150 to the wheel cylinders 21, 22, 23, and 24. The first valve group 161 may include, for example but not limited to, a plurality of solenoid valves disposed on the flow path of the medium.

[0108] The first controller 110 may provide an electrical signal to provide hydraulic pressure of the pressurized medium to the wheel cylinders 21 , 22 , 23 , and 24 in response to a user's intention to brake through the brake pedal 50 and rotation speeds of the wheels 11 , 12 , 13 , and 14 .

[0109] The first controller 110 may include a first motor driver 112, a first valve driver 113, and a first processor 111. One or more of the first motor driver 112, the first valve driver 113, and the first processor 111 may not be essential components of the first controller 110 and may be omitted therefrom.

[0110] The first motor driver 112 may receive a control signal from the first processor 111, and provide a driving current for driving the first motor 156 of the first hydraulic supply 150 in response to the control signal from the first processor 111. For example, the first motor driver 112 may provide a driving current for moving the hydraulic piston 153 in a forward direction to the first motor 156, or provide a driving current for moving the hydraulic piston 153 in a backward direction to the first motor 156 in response to the control signal from the first processor 111. The first motor driver 112 may include, for example, but not limited to, an inverter circuit for controlling the driving current of the first motor 156, a gate driver for driving an input terminal of the inverter circuit, and the like.

[0111] The first valve driver 113 may receive a control signal from the first processor 111, and provide a driving current for driving the first valve group 161 of the first hydraulic controller 160 in response to the control signal from the first processor 111. For example, the first valve driver 113 may provide a driving current to the valve in response to the control signal from the first processor 111 to form a flow path from the first hydraulic chamber 151 of the first hydraulic supplier 150 to the wheel cylinders 21, 22, 23, and 24, or the first valve driver 113 may provide a driving current to the valve in response to the control signal from the first processor 111 to form a flow path from the second hydraulic chamber 152 of the first hydraulic supplier 150 to the wheel cylinders 21, 22, 23, and 24.

[0112] The first processor 111 may process output signals of the pedal sensor 60 and the wheel speed sensor 70 , and control the first hydraulic pressure supply device 100 based on the processing results of the output signals of the pedal sensor 60 and the wheel speed sensor 70 .

[0113] The first processor 111 may control the first motor driver 112 and / or the first valve driver 113 to drive the first motor 156 and / or the first valve group 161 based on the pedal signal from the pedal sensor 60. For example, the first processor 111 may receive a pedal signal indicating an increase or decrease in the stroke of the brake pedal 50 from the pedal sensor 60, and provide a control signal for controlling the first motor 156 and / or the first valve group 161 to the first motor driver 112 and / or the first valve driver 113 based on the received pedal signal. Therefore, the first hydraulic supply device 100 may be implemented to perform a service brake operation.

[0114] The first processor 111 may control the first motor driver 112 and / or the first valve driver 113 to drive the first motor 156 and / or the first valve group 161 based on the wheel speed signal of the wheel speed sensor 70. For example, the first processor 111 may receive the wheel speed signal indicating the rotation speed of the wheels 11, 12, 13, and 14 from the wheel speed sensor 70, and provide the first motor driver 112 and / or the first valve driver 113 with a control signal for controlling the first motor 156 and / or the first valve group 161 based on the wheel speed signal. Thus, the first hydraulic supply device 100 may be implemented to perform the operation of an anti-lock braking system (ABS).

[0115] The first processor 111 may include a semiconductor device or multiple semiconductors. The first processor 111 may include one core or multiple cores inside the semiconductor device. In addition, the first processor 111 may be, for example, but not limited to, a microcontroller unit (MCU).

[0116] In addition, the first processor 111 may include a memory configured to store and / or store programs and data for performing an operation of braking the vehicle based on the driver's braking intention and / or the rotation speeds of the wheels 11, 12, 13, and 14. The memory may provide the first processor 111 with programs and data, and store temporary data generated during the calculation operation of the first processor 111. The memory may include, for example but not limited to, volatile memory (such as static random access memory (S-RAM) and dynamic random access memory (D-RAM)) and non-volatile memory (such as erasable programmable read-only memory (EPROM) and flash memory).

[0117] The second motor 256 may provide power (eg, torque) for generating hydraulic pressure of the pressurized medium to the pump 251. The pump 251 may pump the pressurized medium by the torque provided by the second motor 256.

[0118] The second valve group 261 may control a flow path of the pressurized medium extending from the first hydraulic pressure supplier 150 to the first wheel cylinder 21 and the second wheel cylinder 22 and a flow path of the medium extending from the second hydraulic pressure supplier 250 to the first wheel cylinder 21 and the second wheel cylinder 22. The second valve group 261 may include, for example but not limited to, a plurality of solenoid valves disposed on the flow path of the pressurized medium.

[0119] The second controller 210 can provide an electrical signal for providing (or withdrawing) the hydraulic pressure of the pressurized medium or an electrical signal for applying (or releasing) the parking brakes 31 and 32 to the first wheel cylinder 21 and the second wheel cylinder 22 in response to the user's intention to brake through the brake pedal 50 and the rotation speed of the wheels 11, 12, 13 and 14.

[0120] The second controller 210 may include a second motor driver 212, a second valve driver 213, a parking driver 214, and a second processor 211. One or more of the second motor driver 212, the second valve driver 213, the parking driver 214, and the second processor 211 may not be essential components of the second controller 210 and may be omitted from the second controller 210.

[0121] The second motor driver 212 may receive a control signal from the second processor 211, and provide a driving current for driving the second motor 256 of the second hydraulic pressure supplier 250 in response to the control signal from the second processor 211. For example, the second motor driver 212 may provide a driving current for causing the pump 251 to pump the pressurized medium to the second motor 256 in response to the control signal from the second processor 211. The second motor driver 212 may include, for example but not limited to, an H-bridge circuit for controlling the driving current of the second motor 256 and a gate driver for driving an input terminal of the H-bridge circuit.

[0122] The second valve driver 213 may receive a control signal from the second processor 211, and provide a driving current for driving the second valve group 261 of the second hydraulic controller 260 in response to the control signal from the second processor 211. For example, in response to the control signal from the second processor 211, the second valve driver 213 may provide a driving current to the valve to form a flow path from the pump 251 of the second hydraulic supplier 250 to the first wheel cylinder 21 and the second wheel cylinder 22, or the second valve driver 213 may provide a driving current to the valve to block the flow path from the hydraulic supplier 150 to the first wheel cylinder 21 and the second wheel cylinder 22.

[0123] The parking driver 214 may receive a parking brake application or release signal from the second processor 211, and provide a driving current for applying the parking brakes 31 and 32 to the parking brakes 31 and 32 in response to the parking brake application signal. For example, the parking driver 214 may provide a driving current for limiting or releasing the rotation of the third wheel 13 and the fourth wheel 14 to the parking brakes 31 and 32 in response to the control signal. The parking driver 214 may include, for example, but not limited to, an H-bridge circuit for controlling the driving current of the parking brakes 31 and 32 and a gate driver for driving an input terminal of the H-bridge circuit.

[0124] The second processor 211 may process output signals of the pedal sensor 60 and the wheel speed sensor 70 , and control the second hydraulic supply device 200 and the parking brakes 31 and 32 based on the processing results of the output signals of the pedal sensor 60 and the wheel speed sensor 70 .

[0125] The second processor 211 may send data and / or signals to and receive data and / or signals from the first processor 111 through various communication paths. For example, the second processor 211 may send data and / or signals to and receive data and / or signals from the first processor 111 through a signal line connected to the first processor 111, or send data and / or signals to and receive data and / or signals from the first processor 111 through an in-vehicle communication network.

[0126] The second processor 211 may send and receive data and / or signals to and from the first processor 111. For example, in a normal state, the first processor 111 may periodically send an electrical signal (eg, a pulse signal) to the second processor 211.

[0127] The second processor 211 may receive a periodic signal (e.g., a pulse signal) from the first processor 111, and control to deactivate the second hydraulic supply device 200 while receiving the periodic signal from the first processor 111. For example, when the second processor 211 receives the periodic signal from the first processor 111, the second processor 211 may control the second motor driver 212 not to drive the second motor 256 or deactivate the second motor 256. When the second processor 211 receives the periodic signal from the first processor 111, the second processor 211 may control the second valve driver 213 to allow or form a flow path between the first hydraulic supply device 100 and the first and second wheel cylinders 21 and 22.

[0128] The second processor 211 may be activated based on recognizing that a periodic signal (e.g., a pulse signal) is not received from the first processor 111 within a predetermined period of time. When the second processor 211 does not receive a periodic signal from the first processor 111, the second processor 211 may recognize that the first processor 111 is not in a normal state (in other words, the first processor 111 is in a faulty state), and is activated to execute or take over at least some functions of the first processor 111.

[0129] When the first hydraulic supply device 100 is in a fault state, the second processor 211 may control the second motor 256, the second valve group 261, and / or the parking brakes 31 and 32 to drive the second motor 256, the second valve group 261, and / or the parking brakes 31 and 32 based on the pedal signal from the pedal sensor 60. For example, the second processor 211 may receive a pedal signal indicating an increase or decrease in the stroke of the brake pedal 50 from the pedal sensor 60, and transmit or provide a control signal for controlling the second motor 256, the second valve group 261, and / or the parking brakes 31 and 32 to the second motor driver 212, the second valve driver 213, and / or the parking driver 214 based on the pedal signal. Thus, when the first hydraulic supply device 100 is in a fault state, the second hydraulic supply device 200 may be implemented to perform the operation of service braking.

[0130] When the first hydraulic supply device 100 is in a fault state, the second processor 211 may control the second motor driver 212, the second valve driver 213, and / or the parking driver 214 based on the wheel speed signal from the wheel speed sensor 70 to drive the second motor 256, the second valve group 261, and / or the parking brakes 31 and 32. For example, the second processor 211 may receive a wheel speed signal representing the rotation speed of the wheels 11, 12, 13, and 14 from the wheel speed sensor 70, and provide a control signal for controlling the second motor 256, the second valve group 261, and / or the parking brakes 31 and 32 to the second motor driver 212, the second valve driver 213, and / or the parking driver 214 based on the wheel speed signal. Thus, when the first hydraulic supply device 100 is in a fault state, the first hydraulic supply device 100 may be implemented to perform the operation of the ABS.

[0131] When the second processor 211 is in normal operation, the second processor 211 may send a periodic signal (eg, a pulse signal) to the first processor 111. The first processor 111 may identify whether the second processor 211 is in a normal state based on identifying whether the periodic signal of the second processor 211 is received.

[0132] The second processor 211 may include a semiconductor device or multiple semiconductors. The second processor 211 may include one core or multiple cores inside the semiconductor device. In addition, the second processor 211 may be, for example, but not limited to, an MCU.

[0133] In addition, the second processor 211 may include a memory configured to store and / or store programs and data for braking the vehicle based on the user's braking intention and / or the rotation speeds of the wheels 11, 12, 13, and 14. The memory may provide the second processor 211 with programs and data, and store temporary data generated during the calculation operation of the second processor 211. The memory may include, for example but not limited to, volatile memory (such as S-RAM and D-RAM) and non-volatile memory (such as EPROM and flash memory).

[0134] As described above, the braking system of the vehicle 1 may include the first hydraulic supply device 100, and the first hydraulic supply device 100 may brake the vehicle 1 in response to the driver's braking intention and the driver's parking intention. In addition, the braking system of the vehicle 1 may further include the second hydraulic supply device 200 to provide redundancy. When the first hydraulic supply device 100 is in a faulty state, the second hydraulic supply device 200 may brake the vehicle 1 in response to the driver's braking intention and / or the driver's parking command. Thus, even if the first hydraulic supply device 100 does not operate normally, the braking system may brake the vehicle 1 by the operation of the second hydraulic supply device 200.

[0135] Figure 5 is a block diagram illustrating connections among a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure.

[0136] The braking system of the vehicle 1 may include a wheel speed sensor 70, a first controller 110 and a second controller 210. Figure 5 As shown, the first controller 110 and the second controller 210 may be connected in parallel with each other with respect to the wheel speed sensor 70 .

[0137] The wheel speed sensor 70 may provide the first controller 110 and the second controller 210 with a wheel speed signal corresponding to the rotation speed of the wheels 11, 12, 13, and 14, as described above with reference to FIG. Figure 4 described.

[0138] For example, the wheel speed sensor 70 may include a Hall sensor whose current varies according to a magnetic field. The Hall sensor may be disposed around a tone wheel (e.g., a pulse ring) that rotates with the wheels 11, 12, 13, and 14, and the current of the Hall sensor may vary according to a change in the magnetic field according to the rotation of the tone wheel (e.g., a pulse ring). For example, the distance between the tone wheel (e.g., a pulse ring) and the Hall sensor may change periodically according to the rotation of the tone wheel (e.g., a pulse ring). The current of the Hall sensor may become maximum at the minimum distance between the tone wheel (e.g., a pulse ring) and the Hall sensor, and the current of the Hall sensor may become minimum at the maximum distance between the tone wheel (e.g., a pulse ring) and the Hall sensor. Therefore, the current value of the Hall sensor may vary periodically according to the rotation of the tone wheel (e.g., a pulse ring).

[0139] The first controller 110 may include a first motor driver 112, a first valve driver 113, a first switch 116, a first current sensor 117, a third switch 118, and a first processor 111. One or more of the first motor driver 112, the first valve driver 113, the first switch 116, the first current sensor 117, the third switch 118, and the first processor 111 may not be essential components of the first controller 110 and may be omitted from the first controller 110.

[0140] and Figure 4 The above description about the first motor driver and the first valve driver given together may replace the description about the first motor driver 112 and the first valve driver 113 .

[0141] The first controller 110 may obtain power from the first power source Vdd1 . Current provided from the first power source Vdd1 may flow to the common ground GND via the first controller 110 .

[0142] The first controller 110 may include a pair of first terminals 110a and 110b respectively connected to two terminals of the wheel speed sensor 70. The positive first terminal 110a of the first controller 110 may be connected to the power terminal 70a of the wheel speed sensor 70. The negative first terminal 110b of the first controller 110 may be connected to the signal terminal 70b of the wheel speed sensor 70. The positive first terminal 110a may be connected to the first power supply Vdd1, and the first switch 116, the first current sensor 117, and the third switch 118 may be provided on a line connecting the positive first terminal 110a to the first power supply Vdd1. The negative first terminal 110b may be connected to a common ground GND.

[0143] In other words, the first switch 116, the first current sensor 117, the third switch 118 and the wheel speed sensor 70 may be connected in series with each other between the first power supply Vdd1 and the common ground GND. In addition, the current provided from the first power supply Vdd1 may be supplied to the wheel speed sensor 70 via the first switch 116, the first current sensor 117 and the third switch 118.

[0144] The first switch 116 may be disposed on a conductive line between the first power supply Vdd1 and the wheel speed sensor 70 , and may be configured to selectively allow or block electrical connection between the first power supply Vdd1 and the wheel speed sensor 70 in response to a control signal from the first processor 111 .

[0145] When the first hydraulic supply device 100 is in a normal state, the first processor 111 may provide a signal (e.g., an on signal) for maintaining a closed state (e.g., an on state) of the first switch 116 to the first switch 116. Therefore, when the first hydraulic supply device 100 is in a normal state, the first switch 116 may be maintained in a closed state (e.g., an on state) and allow current to be supplied from the first power supply Vdd1 to the wheel speed sensor 70.

[0146] When the first hydraulic supply device 100 is in a fault state, the first processor 111 may provide a signal (e.g., a disconnection signal) for opening (e.g., disconnecting) the first switch 116 to the first switch 116. Therefore, when the first hydraulic supply device 100 is in a fault state, the first switch 116 may remain in an open state (e.g., a disconnected state) and block the current supply from the first power supply Vdd1 to the wheel speed sensor 70. In addition, the first switch 116 may be opened (e.g., disconnected) when no control signal is received from the first processor 111, for example, due to a fault of the first processor 111.

[0147] The first current sensor 117 may detect a current supplied from the first power source Vdd1 to the wheel speed sensor 70 , and supply an electrical signal (hereinafter, referred to as a “first current signal”) corresponding to the detected current value to the first processor 111 .

[0148] As described above, the current of the wheel speed sensor 70 can be changed according to the rotation of the tone wheel (pulse ring), that is, the rotation of the wheels 11, 12, 13 and 14. Therefore, the current supplied from the first power supply Vdd1 to the wheel speed sensor 70 can be changed according to the rotation of the wheels 11, 12, 13 and 14.

[0149] Thus, the first current sensor 117 can detect the current of the wheel speed sensor 70 that changes according to the rotation of the wheels 11, 12, 13, and 14 when the first switch 116 is closed (e.g., turned on), and provide a first current signal to the first processor 111. The first processor 111 can recognize or calculate the rotation of the wheels 11, 12, 13, and 14 and the rotation speeds of the wheels 11, 12, 13, and 14 based on the first current signal of the first current sensor 117.

[0150] The third switch 118 may be provided on a wire between the first power source Vdd1 and the wheel speed sensor 70, and is configured to selectively allow or prevent electrical connection between the first power source Vdd1 and the wheel speed sensor 70 in response to a control signal from the first processor 111. The first processor 111 may provide the third switch 118 with a signal (e.g., an on signal) for maintaining a closed state (e.g., an on state) of the third switch 118 when the first hydraulic supply device 100 is in a normal state, and provide the third switch 118 with a signal (e.g., an off signal) for opening (e.g., disconnecting) the third switch 118 when the first hydraulic supply device 100 is in a fault state.

[0151] The third switch 118 may be integrated into the first current sensor 117. For example, the third switch 118 may be implemented as a power transistor, and the first current sensor 117 may measure a current value of the third switch 118 replicated by a current mirror circuit.

[0152] The second controller 210 may include a second motor driver 212, a second valve driver 213, a second switch 216, a second current sensor 217, a fourth switch 218, and a second processor 211. One or more of the second motor driver 212, the second valve driver 213, the second switch 216, the second current sensor 217, the fourth switch 218, and the second processor 211 may not be essential components of the second controller 210 and may be omitted from the second controller 210.

[0153] and Figure 4The above description about the second motor driver and the second valve driver given together may replace the description about the second motor driver 212 and the second valve driver 213 .

[0154] The second controller 210 may obtain power from the second power source Vdd2 . Current provided from the second power source Vdd2 may flow to the common ground GND via the second controller 210 .

[0155] The second controller 210 may include a pair of second terminals 210a and 210b respectively connected to two terminals of the wheel speed sensor 70. The positive second terminal 210a of the second controller 210 may be connected to the power terminal 70a of the wheel speed sensor 70. The negative second terminal 210b of the second controller 210 may be connected to the signal terminal 70b of the wheel speed sensor 70. The positive second terminal 210a may be connected to the second power supply Vdd2, and the second switch 216, the second current sensor 217, and the fourth switch 218 may be provided on a line connecting the positive second terminal 210a to the second power supply Vdd2. The negative second terminal 210b may be connected to the common ground GND.

[0156] In other words, the second switch 216, the second current sensor 217, the fourth switch 218 and the wheel speed sensor 70 can be connected in series with each other between the second power supply Vdd2 and the common ground GND. In addition, the current provided from the second power supply Vdd2 can be supplied to the wheel speed sensor 70 via the second switch 216, the second current sensor 217 and the fourth switch 218.

[0157] The second switch 216 may be disposed on a conductive line between the second power supply Vdd2 and the wheel speed sensor 70 , and may be configured to selectively allow or block electrical connection between the second power supply Vdd2 and the wheel speed sensor 70 in response to a control signal from the second processor 211 .

[0158] When the first hydraulic supply device 100 is in a fault state, the second processor 211 may provide a signal (e.g., an on signal) to the second switch 216 for maintaining a closed state (e.g., an on state) of the second switch 216. Therefore, when the first hydraulic supply device 100 is in a fault state, the second switch 216 may be maintained in a closed state (e.g., an on state) and allow current to be supplied from the second power supply Vdd2 to the wheel speed sensor 70.

[0159] When the first hydraulic supply device 100 is in a normal state, the second processor 211 may provide a signal (e.g., a disconnection signal) for opening (e.g., disconnecting) the second switch 216 to the second switch 216. Therefore, when the first hydraulic supply device 100 is in a normal state, the second switch 216 may remain in an open state (e.g., a disconnected state) and block the current supply from the second power supply Vdd2 to the wheel speed sensor 70. In addition, for example, due to a malfunction of the second processor 211, when no control signal is received from the second processor 211, the second switch 216 may be opened (e.g., disconnected).

[0160] The second current sensor 217 may detect the current supplied from the second power source Vdd2 to the wheel speed sensor 70 , and supply an electrical signal (hereinafter, referred to as a “second current signal”) corresponding to the detected current value to the second processor 211 .

[0161] When the second switch 216 is in a closed state (e.g., an on state), the second current sensor 217 may detect the current of the wheel speed sensor 70 that changes according to the rotation of the wheels 11, 12, 13, and 14, and provide a second current signal to the second processor 211. The second processor 211 may recognize or calculate the rotation of the wheels 11, 12, 13, and 14 and the rotation speeds of the wheels 11, 12, 13, and 14 based on the second current signal from the second current sensor 217.

[0162] The fourth switch 218 may be provided on a wire between the second power supply Vdd2 and the wheel speed sensor 70, and may be configured to selectively allow or prevent electrical connection between the second power supply Vdd2 and the wheel speed sensor 70 in response to a control signal from the second processor 211. The second processor 211 may provide the fourth switch 218 with a signal (e.g., an on signal) for maintaining a closed state (e.g., an on state) of the fourth switch 218 when the first hydraulic supply device 100 is in a fault state, and provide the fourth switch 218 with a signal (e.g., an off signal) for opening (e.g., disconnecting) the fourth switch 218 when the first hydraulic supply device 100 is in a normal state.

[0163] The fourth switch 218 may be integrated into the second current sensor 217. For example, the fourth switch 218 may be implemented as a power transistor, and the second current sensor 217 may measure a current value of the fourth switch 218 replicated by a current mirror circuit.

[0164] As described above, the first hydraulic supply device 100 may share the wheel speed sensor 70 provided in each of the wheels 11, 12, 13, and 14 with the second hydraulic supply device 200. When the first hydraulic supply device 100 is in a normal state, the wheel speed sensor 70 may obtain power from the first power supply Vdd1 via the first hydraulic supply device 100, and provide a wheel speed signal to the first processor 111 of the first hydraulic supply device 100. However, when the first hydraulic supply device 100 is in a fault state, the wheel speed sensor 70 may obtain power from the second power supply Vdd2 via the second hydraulic supply device 200, and provide a wheel speed signal to the second processor 211 of the second hydraulic supply device 200.

[0165] Figure 6 is a block diagram illustrating connections among a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure.

[0166] The braking system may include a wheel speed sensor 70, a first controller 110, and a second controller 210. Figure 6 As shown, the first controller 110 and the second controller 210 may be connected in parallel with each other with respect to the wheel speed sensor 70 .

[0167] and Figure 5 The above description about the wheel speed sensor given together may replace the description about the wheel speed sensor 70 .

[0168] The first controller 110 may include a first motor driver 112, a first valve driver 113, a first switch 116, a first current sensor 117, a third switch 118, and a first processor 111. One or more of the first motor driver 112, the first valve driver 113, the first switch 116, the first current sensor 117, the third switch 118, and the first processor 111 may not be essential components of the first controller 110 and may be omitted from the first controller 110.

[0169] and Figure 5 The above description of the first motor driver, the first valve driver, the first switch, the first current sensor, the third switch and the first processor and the wheel speed sensor given together can replace the description of the first motor driver 112, the first valve driver 113, the first switch 116, the first current sensor 117, the third switch 118 and the first processor 111.

[0170] The second controller 210 may include a second motor driver 212, a second valve driver 213, a second switch 216, a second current sensor 217, a fourth switch 218, and a second processor 211. One or more of the second motor driver 212, the second valve driver 213, the second switch 216, the second current sensor 217, the fourth switch 218, and the second processor 211 may not be essential components of the second controller 210 and may be omitted from the second controller 210.

[0171] and Figure 4 The above description about the second motor driver and the second valve driver given together may replace the description about the second motor driver 212 and the second valve driver 213 .

[0172] The second controller 210 may obtain power from the second power source Vdd2 . Current provided from the second power source Vdd2 may flow to the common ground GND via the second controller 210 .

[0173] The second controller 210 may include a pair of second terminals 210a and 210b respectively connected to two terminals of the wheel speed sensor 70. The positive second terminal 210a of the second controller 210 may be connected to the power terminal 70a of the wheel speed sensor 70. The negative second terminal 210b of the second controller 210 may be connected to the signal terminal 70b of the wheel speed sensor 70. The positive second terminal 210a may be connected to the second power supply Vdd2, and the second switch 216 may be provided on a line connecting the positive second terminal 210a to the second power supply Vdd2. The negative second terminal 210b may be connected to the common ground GND, and the second current sensor 217 and the fourth switch 218 may be provided on a line connecting the negative second terminal 210b to the common ground GND.

[0174] In other words, the second switch 216, the wheel speed sensor 70, the second current sensor 217, and the fourth switch 218 may be connected in series with each other between the second power supply Vdd2 and the common ground GND. In addition, the current provided from the second power supply Vdd2 may be supplied to the wheel speed sensor 70 via the second switch 216, and flow to the common ground GND via the second current sensor 217 and the fourth switch 218.

[0175] The second switch 216 may be disposed on a conductive line between the second power supply Vdd2 and the wheel speed sensor 70 , and configured to selectively allow or block electrical connection between the second power supply Vdd2 and the wheel speed sensor 70 in response to a control signal from the second processor 211 .

[0176] The second processor 211 can provide a signal (e.g., an on signal) to the second switch 216 for maintaining the closed state (e.g., on state) of the second switch 216 when the first hydraulic supply device 100 is in a fault state, and provide a signal (e.g., an off signal) to the second switch 216 for opening (e.g., disconnecting) the second switch 216 when the first hydraulic supply device 100 is in a normal state.

[0177] The second current sensor 217 may be provided between the negative second terminal 210b of the second controller 210 and the common ground GND. The second current sensor 217 may detect the current supplied from the second power supply Vdd2 to the wheel speed sensor 70, and provide an electrical signal corresponding to the detected current value (hereinafter, referred to as a "second current signal") to the second processor 211.

[0178] The fourth switch 218 may be connected in series to the second current sensor 217 between the negative second terminal 210b of the second controller 210 and the common ground GND, and is configured to selectively allow or prevent electrical connection between the wheel speed sensor 70 and the common ground GND in response to a control signal from the second processor 211. The second processor 211 may provide the fourth switch 218 with a signal (e.g., an on signal) for maintaining a closed state (e.g., an on state) of the fourth switch 218 when the first hydraulic supply device 100 is in a fault state, and provide the fourth switch 218 with a signal (e.g., an off signal) for opening (e.g., opening) the fourth switch 218 when the first hydraulic supply device 100 is in a normal state.

[0179] As described above, the negative first terminal 110b of the first controller 110 may be connected to the signal terminal 70b of the wheel speed sensor 70 and the negative second terminal 210b of the second controller 210, and the fourth switch 218 may be provided between the negative second terminal 210b and the common ground GND.

[0180] Thus, the stability of the first controller 110 and the second controller 210 can be improved. For example, in order to drive the first motor 156, the first motor driver 112 can supply a large amount of current to the first motor 156, and the large amount of current supplied to the first motor 156 can flow to the common ground GND via the first motor driver 112. At this time, due to the thermal emission of the line between the first controller 110 and the common ground GND, the line between the first controller 110 and the common ground GND may be disconnected. Although the line between the first controller 110 and the common ground GND is disconnected, because the fourth switch 218 is in an off state, a large amount of current can be prevented from flowing to the common ground GND through the line between the negative first terminal 110b and the negative second terminal 210b.

[0181] Figure 7 is a block diagram illustrating connections among a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure.

[0182] The braking system may include a wheel speed sensor 70, a first controller 110, and a second controller 210. Figure 7 As shown, the first controller 110 may be connected in series to the second controller 210, and the first controller 110 and the second controller 210 may be connected in series to the wheel speed sensor 70. The second controller 210 may be connected to the wheel speed sensor 70 via the first controller 110.

[0183] The first controller 110 may include a first motor driver 112, a first valve driver 113, a first switch 116, a first current sensor 117, a third switch 118, and a first processor 111. One or more of the first motor driver 112, the first valve driver 113, the first switch 116, the first current sensor 117, the third switch 118, and the first processor 111 may not be essential components of the first controller 110 and may be omitted from the first controller 110.

[0184] and Figure 4 The above description about the first motor driver and the first valve driver given together may replace the description about the first motor driver 112 and the first valve driver 113 .

[0185] The first controller 110 may obtain power from the first power source Vdd1 . Current provided from the first power source Vdd1 may flow to the common ground GND via the first controller 110 .

[0186] The first controller 110 may include a pair of first terminals 110a and 110b respectively connected to two terminals of the wheel speed sensor 70, and a pair of third terminals 110c and 110d respectively connected to a pair of terminals of the second controller 210. The positive first terminal 110a of the first controller 110 may be connected to the power terminal 70a of the wheel speed sensor 70, and the negative first terminal 110b of the first controller 110 may be connected to the signal terminal 70b of the wheel speed sensor 70. The positive third terminal 110c of the first controller 110 may be connected to the positive terminal of the second controller 210, and the negative third terminal 110d of the first controller 110 may be connected to the negative terminal of the second controller 210. The positive first terminal 110a and the positive third terminal 110c may be connected to the first power supply Vdd1, and the first switch 116, the first current sensor 117, and the third switch 118 may be provided on a line connecting the positive first terminal 110a and the positive third terminal 110c to the first power supply Vdd1. The negative first terminal 110 b and the negative third terminal 110 d may be connected to a common ground GND.

[0187] In other words, the first switch 116, the first current sensor 117, the third switch 118 and the wheel speed sensor 70 may be connected in series with each other between the first power supply Vdd1 and the common ground GND. In addition, the current provided from the first power supply Vdd1 may be supplied to the wheel speed sensor 70 via the first switch 116, the first current sensor 117 and the third switch 118.

[0188] and Figure 5 The above description about the first switch, the first current sensor, the third switch, and the first processor given together may replace the description about the first switch 116 , the first current sensor 117 , the third switch 118 , and the first processor 111 .

[0189] The second controller 210 may include a second motor driver 212, a second valve driver 213, a second switch 216, a second current sensor 217, a fourth switch 218, and a second processor 211. The second motor driver 212, the second valve driver 213, the second switch 216, the second current sensor 217, the fourth switch 218, and the second processor 211 may not be essential components of the second controller 210, and at least some of these components may be omitted.

[0190] and Figure 4 The above description about the second motor driver and the second valve driver given together may replace the description about the second motor driver 212 and the second valve driver 213 .

[0191] The second controller 210 may obtain power from the second power source Vdd2 . Current provided from the second power source Vdd2 may flow to the common ground GND via the second controller 210 .

[0192] The second controller 210 may include a pair of second terminals 210a and 210b connected to a pair of third terminals 110c and 110d of the first controller 110, respectively. The positive second terminal 210a of the second controller 210 may be connected to the positive third terminal 110c of the first controller 110, and the negative second terminal 210b of the second controller 210 may be connected to the negative third terminal 110d of the first controller 110. The positive second terminal 210a may be connected to the second power supply Vdd2, and the second switch 216, the second current sensor 217, and the fourth switch 218 may be provided on a line connecting the positive second terminal 210a to the second power supply Vdd2. The negative second terminal 210b may be connected to the common ground GND.

[0193] In other words, the second switch 216, the second current sensor 217, the fourth switch 218, the wheel speed sensor 70, and the first controller 110 may be connected in series with each other between the second power supply Vdd2 and the common ground GND. In addition, the current provided from the second power supply Vdd2 may be supplied to the wheel speed sensor 70 via the second switch 216, the second current sensor 217, the fourth switch 218, and the first controller 110.

[0194] and Figure 5 The above description about the second switch, the second current sensor, the fourth switch, and the second processor given together may replace the description about the second switch 216 , the second current sensor 217 , the fourth switch 218 , and the second processor 211 .

[0195] Figure 8 is a block diagram illustrating connections among a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure.

[0196] The braking system may include a wheel speed sensor 70, a first controller 110, and a second controller 210. Figure 8 As shown, the first controller 110 may be connected in series to the second controller 210, and the first controller 110 and the second controller 210 may be connected in series to the wheel speed sensor 70. The first controller 110 may be connected to the wheel speed sensor 70 via the second controller 210.

[0197] The first controller 110 may include a first motor driver 112, a first valve driver 113, a first switch 116, a first current sensor 117, a third switch 118, and a first processor 111. One or more of the first motor driver 112, the first valve driver 113, the first switch 116, the first current sensor 117, the third switch 118, and the first processor 111 may not be essential components of the first controller 110 and may be omitted from the first controller 110.

[0198] and Figure 4 The above description about the first motor driver and the first valve driver given together may replace the description about the first motor driver 112 and the first valve driver 113 .

[0199] The first controller 110 may obtain power from the first power source Vdd1 . Current provided from the first power source Vdd1 may flow to the common ground GND via the first controller 110 .

[0200] The first controller 110 may include a pair of first terminals 110a and 110b respectively connected to a pair of terminals of the second controller 210. The positive first terminal of the first controller 110 may be connected to the positive terminal of the second controller 210, and the negative first terminal 110b of the first controller 110 may be connected to the negative terminal of the second controller 210. The positive first terminal 110a may be connected to a first power supply Vdd1, and the first switch 116, the first current sensor 117, and the third switch 118 may be provided on a line connecting the positive first terminal 110a to the first power supply Vdd1. The negative first terminal 110b may be connected to a common ground GND.

[0201] In other words, the first switch 116, the first current sensor 117, the third switch 118, the wheel speed sensor 70, and the second controller 210 may be connected in series with each other between the first power supply Vdd1 and the common ground GND. In addition, the current provided from the first power supply Vdd1 may be supplied to the wheel speed sensor 70 via the first switch 116, the first current sensor 117, the third switch 118, and the second controller 210.

[0202] and Figure 5 The above description about the first switch, the first current sensor, the third switch, and the first processor given together may replace the description about the first switch 116 , the first current sensor 117 , the third switch 118 , and the first processor 111 .

[0203] The second controller 210 may include a second motor driver 212, a second valve driver 213, a second switch 216, a second current sensor 217, a fourth switch 218, and a second processor 211. One or more of the second motor driver 212, the second valve driver 213, the second switch 216, the second current sensor 217, the fourth switch 218, and the second processor 211 may not be essential components of the second controller 210 and may be omitted from the second controller 210.

[0204] and Figure 4 The above description about the second motor driver and the second valve driver given together may replace the description about the second motor driver 212 and the second valve driver 213 .

[0205] The second controller 210 may obtain power from the second power source Vdd2 . Current provided from the second power source Vdd2 may flow to the common ground GND via the second controller 210 .

[0206] The second controller 210 may include a pair of second terminals 210a and 210b respectively connected to two terminals of the wheel speed sensor 70, and a pair of fourth terminals 210c and 210d respectively connected to the pair of first terminals 110a and 110b of the first controller 110. The positive second terminal 210a of the second controller 210 may be connected to the power terminal 70a of the wheel speed sensor 70, and the negative second terminal 210b of the second controller 210 may be connected to the signal terminal 70b of the wheel speed sensor 70. The positive fourth terminal 210c of the second controller 210 may be connected to the positive first terminal 110a of the first controller 110, and the negative fourth terminal 210d of the second controller 210 may be connected to the negative first terminal 110b of the first controller 110. The positive second terminal 210a may be connected to the positive fourth terminal 210c, and the positive second terminal 210a and the positive fourth terminal 210c may be connected to the second power supply Vdd2. The second switch 216, the second current sensor 217 and the fourth switch 218 may be provided on a line connecting the positive second terminal 210a and the positive fourth terminal 210c to the second power supply Vdd2. The negative second terminal 210b may be connected to the negative fourth terminal 210d, and the negative second terminal 210b and the negative fourth terminal 210d may be connected to a common ground GND.

[0207] In other words, the second switch 216, the second current sensor 217, the fourth switch 218 and the wheel speed sensor 70 can be connected in series with each other between the second power supply Vdd2 and the common ground GND. In addition, the current provided from the second power supply Vdd2 can be supplied to the wheel speed sensor 70 via the second switch 216, the second current sensor 217 and the fourth switch 218.

[0208] and Figure 5 The above description about the second switch, the second current sensor, the fourth switch, and the second processor given together may replace the description about the second switch 216 , the second current sensor 217 , the fourth switch 218 , and the second processor 211 .

[0209] Selectively or optionally, a diode D may be provided between the negative fourth terminal 210 d of the second controller 210 and the common ground GND or the wheel speed sensor 70 .

[0210] The diode D may block current flow in one direction from the negative fourth terminal 210d to the common ground GND, and allow current flow in the other direction from the signal terminal 70b of the wheel speed sensor 70 to the negative fourth terminal 210d. In other words, the diode D may block current flow from the first motor driver 112 and the first valve driver 113 of the first controller 110 to the common ground GND, and allow current flow from the wheel speed sensor 70 to the first controller 110.

[0211] Therefore, although the line between the first controller 110 and the common ground GND is disconnected, a large amount of current of the first motor driver 112 and the first valve driver 113 of the first controller 110 can be prevented from flowing to the common ground GND through the line between the negative first terminal 110b and the negative fourth terminal 210d.

[0212] Fig. 9 is a block diagram illustrating connections among a first controller, a second controller, and a wheel speed sensor included in a braking system according to an embodiment of the present disclosure.

[0213] The braking system may include a wheel speed sensor 70, a first controller 110, and a second controller 210. Fig. 9 As shown, the first controller 110 may be connected in series to the second controller 210, and the first controller 110 and the second controller 210 may be connected in series to the wheel speed sensor 70. The first controller 110 may be connected to the wheel speed sensor 70 via the second controller 210.

[0214] The first controller 110 may include a first motor driver 112, a first valve driver 113, a first current sensor 117, a third switch 118, and a first processor 111. One or more of the first motor driver 112, the first valve driver 113, the first current sensor 117, the third switch 118, and the first processor 111 may not be essential components of the first controller 110 and may be omitted from the first controller 110.

[0215] and Figure 4The above description about the first motor driver and the first valve driver given together may replace the description about the first motor driver 112 and the first valve driver 113 .

[0216] The first controller 110 may obtain power from the first power source Vdd1 . Current provided from the first power source Vdd1 may flow to the common ground GND via the first controller 110 .

[0217] The first controller 110 may include a pair of first terminals 110a and 110b respectively connected to a pair of terminals of the second controller 210. The positive first terminal 110a of the first controller 110 may be connected to the positive terminal of the second controller 210, and the negative first terminal 110b of the first controller 110 may be connected to the negative terminal of the second controller 210. The positive first terminal 110a may be connected to a first power supply Vdd1, and the first current sensor 117 and the third switch 118 may be provided on a line connecting the positive first terminal 110a to the first power supply Vdd1. The negative first terminal 110b may be connected to a common ground GND.

[0218] In other words, the first current sensor 117, the third switch 118, the wheel speed sensor 70, and the second controller 210 may be connected in series with each other between the first power supply Vdd1 and the common ground GND. In addition, the current provided from the first power supply Vdd1 may be supplied to the wheel speed sensor 70 via the first current sensor 117, the third switch 118, and the second controller 210.

[0219] and Figure 5 The above description about the first current sensor, the third switch, and the first processor given together may replace the description about the first current sensor 117 , the third switch 118 , and the first processor 111 .

[0220] The second controller 210 may include a second motor driver 212, a second valve driver 213, a second switch 216, a second current sensor 217, a fourth switch 218, a fifth switch 219, and a second processor 211. One or more of the second motor driver 212, the second valve driver 213, the second switch 216, the second current sensor 217, the fourth switch 218, the fifth switch 219, and the second processor 211 may not be essential components of the second controller 210 and may be omitted from the second controller 210.

[0221] and Figure 4 The above description about the second motor driver and the second valve driver given together may replace the description about the second motor driver 212 and the second valve driver 213 .

[0222] The second controller 210 may obtain power from the second power source Vdd2 . Current provided from the second power source Vdd2 may flow to the common ground GND via the second controller 210 .

[0223] The second controller 210 may include a pair of second terminals 210a and 210b respectively connected to two terminals of the wheel speed sensor 70, and a pair of fourth terminals 210c and 210d respectively connected to the pair of first terminals 110a and 110b of the first controller 110. The positive second terminal 210a of the second controller 210 may be connected to the power terminal 70a of the wheel speed sensor 70, and the negative second terminal 210b of the second controller 210 may be connected to the signal terminal 70b of the wheel speed sensor 70. The positive fourth terminal 210c of the second controller 210 may be connected to the positive first terminal 110a of the first controller 110, and the negative fourth terminal 210d of the second controller 210 may be connected to the negative first terminal 110b of the first controller 110. The positive second terminal 210a may be connected to the positive fourth terminal 210c, and the positive second terminal 210a and the positive fourth terminal 210c may be connected to the second power supply Vdd2. The fifth switch 219 may be provided on a line connecting the positive second terminal 210a to the positive fourth terminal 210c. The second switch 216, the second current sensor 217 and the fourth switch 218 may be provided on a line connecting the positive second terminal 210a and the positive fourth terminal 210c to the second power supply Vdd2. The negative second terminal 210b may be connected to the negative fourth terminal 210d, and the negative second terminal 210b and the negative fourth terminal 210d may be connected to a common ground GND.

[0224] In other words, the second switch 216, the second current sensor 217, the fourth switch 218 and the wheel speed sensor 70 can be connected in series with each other between the second power supply Vdd2 and the common ground GND. In addition, the current provided from the second power supply Vdd2 can be supplied to the wheel speed sensor 70 via the second switch 216, the second current sensor 217 and the fourth switch 218.

[0225] In addition, the first current sensor 117, the third switch 118, the fifth switch 219 and the wheel speed sensor 70 may be connected in series with each other between the first power supply Vdd1 and the common ground GND. In addition, the current provided from the first power supply Vdd1 may be supplied to the wheel speed sensor 70 via the first current sensor 117, the third switch 118 and the fifth switch 219.

[0226] and Figure 5 The above description about the second switch, the second current sensor, the fourth switch, and the second processor given together may replace the description about the second switch 216 , the second current sensor 217 , the fourth switch 218 , and the second processor 211 .

[0227] The fifth switch 219 may be disposed on a wire between the positive second terminal 210a and the positive fourth terminal 210c. In other words, the fifth switch 219 may be disposed between the first power supply Vdd1 and the wheel speed sensor 70, and is configured to selectively allow or prevent electrical connection between the first power supply Vdd1 and the wheel speed sensor 70 in response to a control signal from the second processor 211.

[0228] When the first hydraulic supply device 100 is in a normal state, the second processor 211 may provide a signal (e.g., an on signal) for maintaining a closed state (e.g., an on state) of the fifth switch 219 to the fifth switch 219. Therefore, when the first hydraulic supply device 100 is in a normal state, the fifth switch 219 may be maintained in a closed state (e.g., an on state) and allow current to be supplied from the first power supply Vdd1 to the wheel speed sensor 70.

[0229] When the first hydraulic supply device 100 is in a fault state, the second processor 211 may provide a signal (e.g., a disconnection signal) for opening (e.g., disconnecting) the fifth switch 219 to the fifth switch 219. Therefore, when the first hydraulic supply device 100 is in a fault state, the fifth switch 219 may remain in an open state (e.g., a disconnected state) and prevent current from being supplied from the first power supply Vdd1 to the wheel speed sensor 70. However, for example, due to a fault of the second processor 211, when no control signal is received from the second processor 211, the fifth switch 219 may be closed (e.g., turned on).

[0230] Selectively or optionally, a diode D may be provided between the negative fourth terminal 210 d of the second controller 210 and the common ground GND or the wheel speed sensor 70 .

[0231] and Figure 8 The above description about the diode given together may replace the description about the diode D.

[0232] According to an aspect of the present invention, there may be provided a brake system including a hydraulic supply device and an auxiliary supply device capable of obtaining sensing information from a single sensor.

[0233] According to another aspect of the present invention, it is possible to provide a brake system capable of stably obtaining sensing information even when an electrical failure occurs in a hydraulic supply device or an auxiliary supply device.

[0234] Exemplary embodiments of the present disclosure have been described above. In the above exemplary embodiments, some components may be implemented as "modules". Here, the term "module" refers to but is not limited to software and / or hardware components that perform certain tasks, such as field programmable gate arrays (FPGAs) or application specific integrated circuits (ASICs). Modules may advantageously be configured to reside on an addressable storage medium and to be executed on one or more processors.

[0235] Thus, as examples, modules may include components, processes, functions, properties, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables such as software components, object-oriented software components, class components, and task components. The operations provided in the components and modules may be combined into fewer components and modules, or further separated into additional components and modules. In addition, the components and modules may be implemented so that they execute one or more CPUs in a device.

[0236] As described above, in addition to the above exemplary embodiments, the embodiments can therefore be implemented by computer-readable code / instructions in / on a medium (e.g., a computer-readable medium) to control at least one processing element to implement any of the above exemplary embodiments. The medium can correspond to any medium that allows the storage and / or transmission of computer-readable code.

[0237] The computer readable code may be recorded on a medium or transmitted over the Internet. The medium may include a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, and an optical recording medium. In addition, the medium may be a non-transient computer readable medium. The medium may also be a distributed network so that the computer readable code is stored or transmitted and executed in a distributed manner. In addition, by way of example only, the processing element may include at least one processor or at least one computer processor, and the processing element may be distributed and / or included in a single device.

[0238] While exemplary embodiments have been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that other embodiments can be devised which do not depart from the scope of this disclosure. Accordingly, the scope of the present invention is limited solely by the claims appended hereto.

Claims

1. A braking system, comprising: a first hydraulic pressure supplier hydraulically connected to one or more of the wheel cylinders of the vehicle; a second hydraulic pressure supplier hydraulically connected to one or more of the wheel cylinders; a first controller configured to control the first hydraulic pressure supplier to provide a first hydraulic pressure to one or more of the wheel cylinders; as well as a second controller configured to control the second hydraulic pressure supplier to provide a second hydraulic pressure to one or more of the wheel cylinders, in, The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, the first controller is configured to control a first current of the first power source provided to the wheel speed sensor via the second controller, and The second controller is connected to a second power source of the vehicle and the wheel speed sensor, and is configured to selectively allow or prevent the first current of the first power source from flowing to the wheel speed sensor, and selectively allow or prevent the second current of the second power source from flowing to the wheel speed sensor.

2. The braking system according to claim 1, wherein: The first controller comprises: a first current sensor configured to output a first current signal associated with the first current of the first power source; and a first processor configured to identify a wheel speed of the vehicle based on the first current signal associated with the first current of the first power source, and The second controller comprises: a first switch configured to selectively allow or prevent the first current of the first power source from flowing to the wheel speed sensor; a second switch configured to selectively allow or prevent the second power source from a second current flowing to the wheel speed sensor; a second current sensor configured to output a second current signal associated with the second current of the second power source; and A second processor is configured to control the first switch and the second switch and identify a wheel speed of the vehicle based on the second current signal associated with the second current of the second power source.

3. The braking system according to claim 2, wherein: The first switch is connected in series to the first current sensor between the first controller and the wheel speed sensor, and The second switch is connected in series to the second current sensor between the second power source and the wheel speed sensor.

4. The braking system according to claim 2, wherein: The first processor is configured to provide a periodic signal to the second processor in response to recognizing that the first hydraulic supply is in a normal state, and The second processor is configured to control the second switch to allow the first current of the first power supply to flow to the wheel speed sensor, and control the second switch to prevent the second current of the second power supply from flowing to the wheel speed sensor in response to the periodic signal from the first processor.

5. The braking system according to claim 4, wherein: The first processor is configured to, in response to identifying that the first hydraulic supply is in a fault state, not provide the periodic signal to the second processor, The second processor is configured to, in response to recognizing that the second processor has not received the periodic signal from the first processor, control the first switch to prevent the first current of the first power supply from flowing to the wheel speed sensor, and control the second switch to allow the second current of the second power supply to flow to the wheel speed sensor.

6. The braking system according to claim 2, wherein: The first processor is configured to provide a periodic signal to the second processor in response to recognizing that the first hydraulic pressure supplier is in a normal state, and control the first hydraulic pressure supplier according to an output signal from a pedal sensor of the vehicle, and The second processor is configured to control the second hydraulic pressure supplier according to an output signal from the pedal sensor of the vehicle in response to recognizing that the second processor has not received the periodic signal from the first processor.

7. The braking system according to claim 2, wherein: The second controller further includes a diode connected between a ground of the second controller and the first controller, the diode being configured to block current from flowing from the first controller to the ground of the second controller.

8. A braking system, comprising: a first hydraulic pressure supplier hydraulically connected to one or more of the wheel cylinders of the vehicle; a second hydraulic pressure supplier hydraulically connected to one or more of the wheel cylinders; a first controller configured to control the first hydraulic pressure supplier to provide a first hydraulic pressure to one or more of the wheel cylinders; as well as a second controller configured to control the second hydraulic pressure supplier to provide a second hydraulic pressure to one or more of the wheel cylinders, in, The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, the first controller being configured to selectively allow or prevent a first current of the first power source from flowing to the wheel speed sensor via the second controller, and The second controller is connected to a second power source of the vehicle and the wheel speed sensor, and is configured to selectively allow or prevent a second current of the second power source from flowing to the wheel speed sensor.

9. The braking system according to claim 8, wherein: The first controller comprises: a first switch configured to selectively allow or prevent the first current of the first power source from flowing to the wheel speed sensor via the second controller; a first current sensor configured to output a first current signal associated with the first current of the first power source; and a first processor configured to control the first switch and identify a wheel speed of the vehicle based on the first current signal associated with the first current of the first power source, and The second controller comprises: a second switch configured to selectively allow or prevent the second current of the second power source from flowing to the wheel speed sensor; a second current sensor configured to output a second current signal associated with the second current of the second power source; and A second processor is configured to identify the wheel speed of the vehicle based on the second current signal associated with the second current of the second power source.

10. The brake system according to claim 9, wherein: The first switch is connected in series to the first current sensor between the first power source and the second controller, and The second switch is connected in series to the second current sensor between the second power source and the wheel speed sensor.

11. The brake system according to claim 9, wherein: The first processor is configured to, in response to recognizing that the first hydraulic pressure supplier is in a normal state, control the first switch of the first controller to provide a periodic signal to the second processor and allow the first current of the first power supply to flow to the wheel speed sensor, and The second processor is configured to control the second switch of the second controller to prevent the second current of the second power supply from flowing to the wheel speed sensor in response to the periodic signal from the first processor.

12. The brake system according to claim 11, wherein: The first processor is configured to, in response to recognizing that the first hydraulic pressure supplier is in a fault state, control the first switch of the first controller to not provide the periodic signal to the second processor and prevent the first current of the first power supply from flowing to the wheel speed sensor, and The second processor is configured to control the second switch of the second controller to allow the second current of the second power supply to flow to the wheel speed sensor in response to recognizing that the second processor has not received the periodic signal from the first processor.

13. The brake system according to claim 9, wherein: The first processor is configured to provide a periodic signal to the second processor in response to recognizing that the first hydraulic pressure supplier is in a normal state, and control the first hydraulic pressure supplier according to an output signal from a pedal sensor of the vehicle, and The second processor is configured to control the second hydraulic pressure supplier according to the output signal from the pedal sensor of the vehicle in response to recognizing that the second processor has not received the periodic signal from the first processor.

14. The braking system according to claim 9, wherein: The second controller further includes a diode connected between a ground of the second controller and the first controller, the diode being configured to block current from flowing from the first controller to the ground of the second controller.

15. A braking system, comprising: a first hydraulic pressure supplier hydraulically connected to one or more of the wheel cylinders of the vehicle; a second hydraulic pressure supplier hydraulically connected to one or more of the wheel cylinders; a first controller configured to control the first hydraulic pressure supplier to provide a first hydraulic pressure to one or more of the wheel cylinders; as well as a second controller configured to control the second hydraulic pressure supplier to provide a second hydraulic pressure to one or more of the wheel cylinders, in, The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, the first controller being configured to selectively allow or prevent a first current of the first power source from flowing to the wheel speed sensor, and The second controller is connected to a second power source of the vehicle and the wheel speed sensor, and is configured to selectively allow or prevent a second current of the second power source from flowing to the wheel speed sensor.

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