ELECTRIC BRAKE SYSTEM AND METHOD OF CONTROLLING THE SAME

    公开(公告)号:US20230294651A1

    公开(公告)日:2023-09-21

    申请号:US18120297

    申请日:2023-03-10

    发明人: Youngeun CHO

    IPC分类号: B60T13/68 B60T8/1761 B60T8/40

    摘要: Disclosed herein is an electric brake system including a reservoir, a master cylinder, a hydraulic pressure supply device configured to operate a hydraulic piston according to an electrical signal output in response to a displacement of a brake pedal and generate a hydraulic pressure, a hydraulic pressure control unit configured to control the hydraulic pressure transmitted to a wheel cylinder from the hydraulic pressure supply device, a hydraulic pressure auxiliary device configured to operate when the hydraulic pressure supply device is inoperable and provide the hydraulic pressure to two wheel cylinders and including a pair of pumps configured to pressurize the pressurizing medium, a motor configured to drive the pair of pumps, a first support valve provided on a first auxiliary hydraulic pressure flow path for transmitting the pressurizing medium pressurized by any one of the pair of pumps to a first wheel cylinder to control a flow of the pressurizing medium, and a second support valve provided on a second auxiliary hydraulic pressure flow path for transmitting the pressurizing medium pressurized by the other of the pair of pumps to a second wheel cylinder to control the flow of the pressurizing medium, a pressure sensor configured to detect pressures of the pressurizing media transmitted to the first support valve and the second support valve from the pair of pumps, and a controller configured to control the hydraulic pressure supply device, the hydraulic pressure control unit, and the hydraulic pressure auxiliary device, wherein the controller is configured to estimate a wheel pressure of at least one control target wheel cylinder of the first wheel cylinder and the second wheel cylinder during ABS control in a first fallback mode performed by the hydraulic pressure auxiliary device, synchronize an upstream pressure and a downstream pressure of at least one control target support valve of the first support valve and the second support valve, and compensate the estimated wheel pressure of the control target wheel cylinder to be a pressure detected by the pressure sensor during the synchronization.

    Brake preload system for autonomous vehicles

    公开(公告)号:US11760319B2

    公开(公告)日:2023-09-19

    申请号:US17653101

    申请日:2022-03-01

    申请人: UATC, LLC

    摘要: Vehicles according to at least some embodiments of the disclosure include a sensor, and a computing device comprising at least one hardware processing unit. The computing device is programmed to perform operations comprising capturing an image with the sensor, identifying an object in the image, and in response to an accuracy of the identification meeting a first criterion, pre-loading a braking system of the autonomous vehicle. In some aspects, the computing device may predict that an object not currently within a path of the vehicle has a probability of entering the path of the vehicle that meets a second criterion. When the probability of entering the path meets the second criterion, some of the disclosed embodiments may pre-load the braking system.

    Electric booster for autonomous vehicle having dual actuator

    公开(公告)号:US11745713B2

    公开(公告)日:2023-09-05

    申请号:US17026863

    申请日:2020-09-21

    摘要: An electric brake booster for an autonomous vehicle is provided. The electric brake booster includes a body part that receives a power cylinder generating braking pressure in an autonomous driving/braking mode and a master cylinder generating braking pressure in a manual driver braking mode. A driving shaft is movable in an axial direction in the power cylinder and coupled to a piston. A first motor is connected to a first side of the driving shaft and provides driving power thereto. A second motor is connected to a second side of the driving shaft and provides driving power thereto in a direction equal to that of the driving power provided from the first motor. A controller determines whether the first or second motor normally operates and simultaneously or separately operates the first and second motors based on a magnitude of the pressure in the power cylinder or whether emergency braking occurs.

    Brake Pedal Simulator, Brake Pedal Feel Selection Module and Vehicle Braking System

    公开(公告)号:US20230264666A1

    公开(公告)日:2023-08-24

    申请号:US18113245

    申请日:2023-02-23

    摘要: The disclosure provides a brake pedal simulator comprising a simulator cylinder; a simulator piston within the simulator cylinder, a simulation chamber being defined between the simulator piston and a first end of the simulator cylinder; an elastically deformable component and an adjusting component, the elastically deformable component being arranged between the simulator piston and the adjusting component and placed in a pre-deformed state by them, and the adjusting component being movable to change the amount of elastic deformation of the elastically deformable component so that it can assume a plurality of pre-deformed states and maintain the elastically deformable component in each of the plurality of pre-deformed states. The disclosure also provides a brake pedal feel selection module comprising the brake pedal simulator and a vehicle brake system comprising the module.

    Brake system
    68.
    发明授权

    公开(公告)号:US11731601B2

    公开(公告)日:2023-08-22

    申请号:US17091250

    申请日:2020-11-06

    发明人: Takanori Matsuki

    摘要: A brake system includes an electromagnetic brake device configured to apply a brake to a rotary shaft when current is not applied to the brake system and release the brake on the rotary shaft when current is applied to the brake system; and a brake release device configured to forcibly release the brake on the rotary shaft when current is not applied to the brake system. The brake release device includes a guide member having a tube shape; a release plate disposed within the guide member and engaged with the armature; and a transfer unit that is configured to move the release plate in a direction in which the rotary shaft extends.