公开(公告)号：US20220227337A1

公开(公告)日：2022-07-21

申请号：US17574828

申请日：2022-01-13

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  ADVICS CO., LTD.

Inventor： Takahiro OKANO ,  Shun MIZOO ,  Ken KUZUYA

IPC: B60T8/172 ,  B60T13/74 ,  B60T8/88 ,  B60T7/04 ,  B60T8/40 ,  B60T17/22 ,  B60T8/26 ,  B60T13/14 ,  B60T13/68 ,  B60T13/66 ,  F16D65/18 ,  F16D121/24 ,  F16D55/226 ,  F16D125/40

Abstract: A hydraulic brake system for a vehicle, including: a wheel brake device configured to generate a braking force based on a pressure of a working fluid; a first brake system including a high-pressure source device including an accumulator and a first pump device that is driven intermittently such that a pressure of the working fluid in the accumulator is not lower than a set lower limit pressure and not higher than a set upper limit pressure; a second brake system including a second pump device; and a main power source that supplies electricity to the first and second brake systems, wherein the hydraulic brake system includes an auxiliary power source that supplies electricity to the first brake system when a failure occurs in the main power source, and wherein the first pump device is continuously driven when the failure occurs irrespective of the pressure in the accumulator.

公开(公告)号：US20210362698A1

公开(公告)日：2021-11-25

申请号：US16644004

申请日：2018-09-05

Applicant: ADVICS CO., LTD.

Inventor： Yasuhito ISHIDA ,  Kunihiro NISHIWAKI ,  Tatsushi KOBAYASHI ,  Tomotaka ASANO ,  Ken KUZUYA ,  Takayuki YAMAMOTO

IPC: B60T8/94 ,  B60T17/22 ,  B60T13/58 ,  B60T13/66

Abstract: A braking control device includes an upstream mechanism control unit, a determination unit, and a control unit. The upstream mechanism control unit is configured to feedback control the upstream mechanism in such a manner that a detected hydraulic pressure detected by a hydraulic pressure sensor is brought to an upstream target hydraulic pressure. The hydraulic pressure sensor detects a hydraulic pressure of the hydraulic pressure circuit. The determination unit is configured to determine, based on the detected hydraulic pressure by the hydraulic pressure sensor, whether hydraulic pressure hunting is occurring. The control unit is configured to control the downstream mechanism based on the upstream target hydraulic pressure and the target wheel pressure in a case where the determination unit determines that the hydraulic pressure hunting is occurring.

公开(公告)号：US20210122339A1

公开(公告)日：2021-04-29

申请号：US16645114

申请日：2018-09-28

Applicant: ADVICS CO., LTD.

Inventor： Ken KUZUYA ,  Tomotaka ASANO ,  Yasuhito ISHIDA ,  Tatsushi KOBAYASHI ,  Takayuki YAMAMOTO

IPC: B60T8/174 ,  B60T13/14 ,  B60T13/20 ,  H02P5/46 ,  B60T8/72

Abstract: This vehicle brake device comprises: a simultaneous driving determination section which determines whether it is necessary to simultaneously drive an upstream-side motor and a downstream-side motor; and a PWM control section which, when the determination result by the simultaneous driving determination section is in the affirmative, changes the duty ratio of the PWM signal to be output to the upstream-side motor so as to be smaller than when the determination result by the simultaneous driving determination section is in the negative, and uses PWM control to drive the upstream-side motor.