KR-102961208-B1 - BRAKE APPARATUS

Abstract

A brake device comprises: a first hydraulic pressure supply connected to a wheel cylinder of a vehicle; a second hydraulic pressure supply connected to the wheel cylinder; a first controller that controls the first hydraulic pressure supply to provide a first hydraulic pressure to the wheel cylinder; and a second controller that controls the second hydraulic pressure supply to provide a second hydraulic pressure to the wheel cylinder. The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, and supplies a first current of the first power source to the wheel speed sensor through the second controller. The second controller is connected to a second power source of the vehicle and a wheel speed sensor, and allows or blocks the supply of the first current of the first power source to the wheel speed sensor, and allows or blocks the supply of the second current of the second power source to the wheel speed sensor.

Inventors

• 이창우

Assignees

• 에이치엘만도 주식회사

Dates

Publication Date

20260507

Application Date

20230616

Claims (20)

1. A first hydraulic supply connected to the wheel cylinder of the vehicle; A second hydraulic pressure supply connected to the wheel cylinder above; A first controller for controlling the first hydraulic pressure supply to provide a first hydraulic pressure to the wheel cylinder; and It includes a second controller that controls the second hydraulic pressure supply to provide a second hydraulic pressure to the wheel cylinder, and The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, supplies a first current of the first power source to the wheel speed sensor through the second controller, and includes a first current sensor that outputs a first current signal corresponding to the first current and a first processor that identifies the wheel speed of the vehicle based on the first current signal. The second controller comprises a second current sensor connected to a second power source and a wheel speed sensor of the vehicle, which allows or blocks the supply of a first current of the first power source to the wheel speed sensor and allows or blocks the supply of a second current of the second power source to the wheel speed sensor, and outputs a second current signal corresponding to the second current, and a second processor that identifies the wheel speed of the vehicle based on the second current signal and controls the supply of current to the wheel speed sensor based on whether a periodic signal is received from the first processor. A brake device in which the first controller and the second controller are connected in series and connected to the wheel speed sensor.
2. In paragraph 1, The above-mentioned second controller further comprises a first switch that allows or blocks the supply of the first current of the first power source to the wheel speed sensor, and a second switch that allows or blocks the supply of the second current of the second power source to the wheel speed sensor.
3. In paragraph 2, The first switch is connected in series with the first current sensor between the first controller and the wheel speed sensor, and The above second switch is a brake device connected in series with the second current sensor between the second power source and the wheel speed sensor.
4. In paragraph 2, The first processor provides a periodic signal to the second processor based on identifying the normal state of the first hydraulic pressure supply, and A brake device wherein the second processor controls the first switch to allow the first current to be supplied to the wheel speed sensor and controls the second switch to block the supply of the second current to the wheel speed sensor based on receiving a periodic signal from the first processor.
5. In paragraph 4, The first processor does not provide a periodic signal to the second processor based on identifying the fail state of the first hydraulic pressure supply, and A brake device wherein the second processor controls the first switch to block the supply of the first current to the wheel speed sensor and controls the second switch to allow the supply of the second current to the wheel speed sensor based on the fact that the second processor has not received a periodic signal.
6. In paragraph 2, The first processor provides a periodic signal to the second processor based on identifying the normal state of the first hydraulic pressure supply and controls the first hydraulic pressure supply based on the output signal of the pedal sensor of the vehicle. The brake device, wherein the second processor controls the second hydraulic pressure supply based on the output signal of the pedal sensor of the vehicle based on the fact that it has not received the periodic signal of the first processor.
7. In paragraph 2, A brake device comprising a diode that is provided between the ground of the second controller and the first controller and blocks current from the first controller to the ground of the second controller.
8. A first hydraulic supply connected to the wheel cylinder of the vehicle; A second hydraulic pressure supply connected to the wheel cylinder above; A first controller for controlling the first hydraulic pressure supply to provide a first hydraulic pressure to the wheel cylinder; and It includes a second controller that controls the second hydraulic pressure supply to provide a second hydraulic pressure to the wheel cylinder, and The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, and includes a first current sensor that allows or blocks the supply of a first current of the first power source to the wheel speed sensor through the second controller and outputs a first current signal corresponding to the first current, and a first processor that identifies the wheel speed of the vehicle based on the first current signal. The second controller is connected to the second power supply of the vehicle and the wheel speed sensor, and includes a second current sensor that allows or blocks the supply of a second current of the second power supply to the wheel speed sensor and outputs a second current signal corresponding to the second current, and a second processor that identifies the wheel speed of the vehicle based on the second current signal and controls the supply of current to the wheel speed sensor based on whether a periodic signal is received from the first processor. A brake device in which the first controller and the second controller are connected in series and connected to the wheel speed sensor.
9. In paragraph 8, The first controller further includes a first switch that allows or blocks the supply of the first current of the first power source to the wheel speed sensor through the second controller, and The above-mentioned second controller is a brake device further comprising a second switch that allows or blocks the supply of the second current of the second power source to the wheel speed sensor.
10. In Paragraph 9, The first switch is connected in series with the first current sensor between the first power source and the second controller, and The above second switch is a brake device connected in series with the second current sensor between the second power source and the wheel speed sensor.
11. In Paragraph 9, The first processor controls the first switch to allow supplying a periodic signal to the second processor and supplying the first current to the wheel speed sensor based on identifying the normal state of the first hydraulic pressure supply, and The above second processor is a brake device that controls the second switch to block the supply of the second current to the wheel speed sensor based on receiving a periodic signal from the above first processor.
12. In Paragraph 11, Based on identifying the failure state of the first hydraulic pressure supply, the first processor controls the first switch to block the supply of the first current to the wheel speed sensor without providing a periodic signal to the second processor, and The brake device, wherein the second processor controls the second switch to allow the second current to be supplied to the wheel speed sensor based on the fact that it has not received a periodic signal from the first processor.
13. In Paragraph 9, The first processor provides a periodic signal to the second processor based on identifying the normal state of the first hydraulic pressure supply and controls the first hydraulic pressure supply based on the output signal of the pedal sensor of the vehicle, The brake device, wherein the second processor controls the second hydraulic pressure supply based on the output signal of the pedal sensor of the vehicle based on the fact that it has not received the periodic signal of the first processor.
14. In Paragraph 9, A brake device comprising a diode that is provided between the ground of the second controller and the first controller and blocks current from the first controller to the ground of the second controller.
15. A first hydraulic supply connected to the wheel cylinder of the vehicle; A second hydraulic pressure supply connected to the wheel cylinder above; A first controller for controlling the first hydraulic pressure supply to provide a first hydraulic pressure to the wheel cylinder; and It includes a second controller that controls the second hydraulic pressure supply to provide a second hydraulic pressure to the wheel cylinder, and The first controller is connected to a first power source of the vehicle and a wheel speed sensor of the vehicle, and includes a first current sensor that allows or blocks the supply of a first current of the first power source to the wheel speed sensor and outputs a first current signal corresponding to the first current, and a first processor that identifies the wheel speed of the vehicle based on the first current signal. The second controller is connected to the second power supply of the vehicle and the wheel speed sensor, and includes a second current sensor that allows or blocks the supply of a second current of the second power supply to the wheel speed sensor and outputs a second current signal corresponding to the second current, and a second processor that identifies the wheel speed of the vehicle based on the second current signal and controls the supply of current to the wheel speed sensor based on whether a periodic signal is received from the first processor. A brake device in which a first motor driver and a first valve driver are connected in parallel between the first power source and a common ground, and a second motor driver and a second valve driver are connected in parallel between the second power source and a common ground.
16. In paragraph 15, The first controller further includes a first switch that allows or blocks the supply of the first current of the first power source to the wheel speed sensor, and The above-mentioned second controller is a brake device further comprising a second switch that allows or blocks the supply of the second current of the second power source to the wheel speed sensor.
17. In Paragraph 16, The first switch is connected in series with the first current sensor between the first power source and the wheel speed sensor, and The above second switch is a brake device connected in series with the second current sensor between the second power source and the wheel speed sensor.
18. In Paragraph 16, The first processor controls the first switch to allow supplying a periodic signal to the second processor and supplying the first current to the wheel speed sensor based on identifying the normal state of the first hydraulic pressure supply, and The above second processor is a brake device that controls the second switch to block the supply of the second current to the wheel speed sensor based on receiving a periodic signal from the above first processor.
19. In Paragraph 18, Based on identifying the fail state of the first hydraulic pressure supply, the first processor controls the first switch to block the supply of the first current to the wheel speed sensor without providing a periodic signal to the second processor, and The brake device, wherein the second processor controls the second switch to allow the second current to be supplied to the wheel speed sensor based on the fact that it has not received a periodic signal from the first processor.
20. In Paragraph 16, The first processor provides a periodic signal to the second processor based on identifying the normal state of the first hydraulic pressure supply and controls the first hydraulic pressure supply based on the output signal of the pedal sensor of the vehicle. The above second processor controls the second hydraulic pressure supply based on the output signal of the pedal sensor of the vehicle based on the fact that it has not received the periodic signal of the first processor.

Description

Brake apparatus {BRAKE APPARATUS} The disclosed invention relates to an electro-hydraulic brake device. Vehicles are essentially equipped with braking devices to perform braking, and braking devices are being proposed in various ways to brake the vehicle for the safety of drivers and passengers. In conventional brake systems, when a driver presses the brake pedal, a mechanically connected booster is used to provide the hydraulic pressure (pressure of brake oil) required for braking to the wheel cylinders. However, there is a growing market demand to implement various braking functions in response to the vehicle's operating environment. Accordingly, electronic brake systems that include a cylinder-piston type hydraulic pressure supply unit—which receives the driver's braking intent via an electrical signal when the driver presses the brake pedal and supplies the necessary hydraulic pressure to the wheel cylinders—are becoming widely adopted. Furthermore, electronic brake systems are being developed that additionally include a backup supply unit to prepare for the failure of the electrically controlled hydraulic pressure supply unit (e.g., failure of the Electronic Control Unit (ECU), motor failure, or power interruption). FIG. 1 illustrates the configuration of a vehicle according to one embodiment. FIGS. 2 and FIGS. 3 illustrate the configuration of a brake system according to one embodiment. FIG. 4 illustrates the configuration of first and second controllers included in a brake system according to one embodiment. FIG. 5 illustrates an example of a connection between a first controller, a second controller, and a wheel speed sensor included in a brake system according to one embodiment. FIG. 6 illustrates an example of a connection between a first controller, a second controller, and a wheel speed sensor included in a brake system according to one embodiment. FIG. 6 illustrates an example of a connection between a first controller, a second controller, and a wheel speed sensor included in a brake system according to one embodiment. FIG. 7 illustrates an example of a connection between a first controller, a second controller, and a wheel speed sensor included in a brake system according to one embodiment. FIG. 8 illustrates an example of a connection between a first controller, a second controller, and a wheel speed sensor included in a brake system according to one embodiment. FIG. 9 illustrates an example of a connection between a first controller, a second controller, and a wheel speed sensor included in a brake system according to one embodiment. Throughout the specification, the same reference numerals refer to the same components. This specification does not describe all elements of the embodiments, and general content in the art to which the disclosed invention pertains or content that overlaps between embodiments is omitted. The terms 'part, module, component, block' used in the specification may be implemented in software or hardware, and depending on the embodiments, a plurality of 'parts, modules, components, blocks' may be implemented as a single component, or a single 'part, module, component, block' may include a plurality of components. Throughout the specification, when a part is described as being 'connected' to another part, this includes not only cases where they are directly connected but also cases where they are indirectly connected, and indirect connections include connections made via a wireless communication network. Furthermore, when it is stated that a part 'includes' a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Throughout the specification, when it is stated that a component is located 'on' another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components. Terms such as "first," "second," etc., are used to distinguish one component from another, and the components are not limited by the aforementioned terms. Singular expressions include plural expressions unless there is an obvious exception in the context. In each step, identification codes are used for convenience of explanation and do not describe the order of the steps; the steps may be performed differently from the specified order unless a specific order is clearly indicated in the context. The operating principle and embodiments of the disclosed invention will be described below with reference to the attached drawings. FIG. 1 illustrates the configuration of a vehicle according to one embodiment. The vehicle (1) may include a body that forms its exterior and accommodates a driver and/or luggage, a chassis that includes components of the vehicle (1) other than the body, and wheels (11, 12, 13, 14) that rotate to allow the vehicle (1) to move. As illustrated in FIG. 1, the wheels (11, 12, 13, 14) may include, f