公开(公告)号：US20210367541A1

公开(公告)日：2021-11-25

申请号：US17273483

申请日：2019-09-24

Applicant: ADVICS CO., LTD.

Inventor： Atsushi TAKAHASHI

IPC: H02P21/00 ,  H02P21/22 ,  H02P21/26

Abstract: A motor control device includes a current acquisition unit that acquires a limit current allowed to flow from a battery to a brushless motor, a voltage acquisition unit that acquires a power supply voltage applied from the battery to the brushless motor, and a command current determination unit that determines a d-axis command current and a q-axis command current. The command current determination unit determines the d-axis command current and the q-axis command current based on a power limit circle which is a current characteristic on a d-axis and a q-axis based on an inner product of a voltage vector and a current vector and a voltage limit circle which is a current characteristic on the d-axis and the q-axis based on the power supply voltage and an angular velocity of the brushless motor.

公开(公告)号：US20210347344A1

公开(公告)日：2021-11-11

申请号：US17274244

申请日：2019-09-24

Applicant: ADVICS CO., LTD.

Inventor： Masato TERASAKA ,  Chisa KITAHARA

IPC: B60T8/1761 ,  B60T8/173 ,  B60T8/172

Abstract: A step determination device includes an operation amount sensor that detects an operation amount of a braking operation member, and a controller that determines a step by using the wheel speed and the operation amount. In the step determination device, the controller calculates an actual variable amount by using the wheel speed, calculates an estimated variable amount corresponding to the actual variable amount by using the operation amount, and executes the determination of the step by using the actual variable amount and the estimated variable amount. For example, the controller determines the presence of the step when the deviation between the actual variable amount and the estimated variable amount is not less than a predetermined value, and determines the absence of the step when the deviation is less than the predetermined value.

公开(公告)号：US11161499B2

公开(公告)日：2021-11-02

申请号：US16313730

申请日：2017-06-26

Applicant: ADVICS CO., LTD.

Inventor： Yosuke Hashimoto

IPC: B60W30/045 ,  B60T8/1755 ,  B60W10/188 ,  B60W10/16 ,  B60W10/18

Abstract: During vehicle turning, during which a behavior stabilization control is not carried out, a vehicle driving assistance device carries out a turning assist control including: yaw moment control for increasing the amount of drive torque distributed to a drive wheel that, among two left and right drive wheels of the vehicle, is on the outer side of the turn by imparting braking torque to the drive wheel that is on the inner side of the turn; and a deceleration control for decelerating the vehicle. At this time, the driving assistance device calculates a control moment amount and calculates a control deceleration amount on the basis of a travel mode selected by operation of an operation unit.

公开(公告)号：US20210316706A1

公开(公告)日：2021-10-14

申请号：US17273120

申请日：2019-09-26

Applicant: ADVICS CO., LTD.

Inventor： Aritomo NABETA ,  Masayuki NAITO

IPC: B60T13/68

Abstract: The present disclosure relates to a brake control device that supplies hydraulic pressure from a hydraulic pressure supply source to a wheel cylinder through a hydraulic pressure supply passage, and adjusts braking hydraulic pressure, which is the hydraulic pressure in the wheel cylinder by a solenoid valve provided in the hydraulic pressure supply passage, the brake control device including a control unit that, when holding the solenoid valve in an operating state, applies to the solenoid valve a holding current set to greater than or equal to a minimum required current necessary for holding the solenoid valve in the operating state; and a current adjusting unit that adjusts the holding current based on change in braking conditions.

公开(公告)号：US11110929B2

公开(公告)日：2021-09-07

申请号：US16347224

申请日：2017-11-10

Applicant: ADVICS CO., LTD.

Inventor： Yohei Mizuguchi ,  Masato Terasaka

IPC: B60W40/105 ,  B60T8/171 ,  B60T8/32 ,  B60T8/1761 ,  B60W30/18

Abstract: Anti-skid control is performed by switching between a reduction mode for reducing braking torque and an increase mode for increasing braking torque based on a comparison between four wheel speeds and vehicle body speed. A controller calculates wheel accelerations based on wheel speeds and includes a control mode condition where the reduction mode is selected at each wheel and a wheel acceleration condition where each wheel acceleration is within a predetermined value range. If a state in which the control mode condition and the wheel acceleration condition are simultaneously satisfied is maintained over a predetermined time period, the controller determines that a residual state is satisfied. When the residual state is not satisfied, the controller calculates vehicle body speed based on the maximum value of the wheel speeds, whereas when the residual state is satisfied, the controller calculates vehicle body speed based on the minimum value of the wheel speeds.

公开(公告)号：US11104319B2

公开(公告)日：2021-08-31

申请号：US16316878

申请日：2017-07-14

Applicant: ADVICS CO., LTD.

Inventor： Yasuhito Ishida ,  Takayuki Yamamoto

IPC: B60T17/22 ,  B60T8/17 ,  B60T13/12

Abstract: A braking control device for imparting brake fluid pressure on wheel cylinders in response to operation of a braking operation member to produce braking force includes: first and second fluid pressure units for imparting brake fluid pressure by first and second power sources respectively; and a determining device for determining whether or not operation of the first fluid pressure unit is appropriate. When the determining device determines that operation is appropriate, the first fluid pressure unit imparts brake fluid pressure based on a suitability characteristic, which is the relationship between the brake fluid pressure and the braking operation member operation amount, set in advance. The second fluid pressure unit has proximity characteristics, generally matching the suitability characteristic, and notification characteristics, different from the suitability characteristic. When operation of the first fluid pressure unit is not appropriate, the second fluid pressure unit imparts brake fluid pressure based on the proximity or notification characteristics.

公开(公告)号：US11073187B2

公开(公告)日：2021-07-27

申请号：US16369518

申请日：2019-03-29

Applicant: ADVICS North America, Inc. ,  ADVICS CO., LTD.

Inventor： Shusuke Suzuki ,  Katsuya Okayama ,  Masato Nishioka

IPC: F16D69/02

Abstract: A brake pad according to an embodiment includes a friction material containing copper at 0.5 wt % or less, a back plate, and an under-layer material laminated between the friction material and the back plate and having an average loss modulus of 500 MPa or more at −50° C. to 0° C. in a bending mode.

公开(公告)号：US20210213835A1

公开(公告)日：2021-07-15

申请号：US16967432

申请日：2019-02-05

Applicant: ADVICS CO., LTD.

Inventor： Takayuki YAMAMOTO ,  Hiroyuki KODAMA ,  Hiroyuki ANDO

IPC: B60L7/26 ,  B60T1/10

Abstract: A vehicle includes a regenerative generator on a front wheel. A braking control device includes an actuator that applies a front wheel torque and a rear wheel torque, and a controller that individually adjusts the front wheel torque and the rear wheel torque. The controller is configured to determine the front wheel torque and the rear wheel torque to zero when a regenerative braking force Fg generated by the regenerative generator has not reached a maximum regenerative force Fx which is a generatable maximum value. On the other hand, the controller is configured to increase the rear wheel torque from zero before increasing the front wheel torque from zero when the regenerative braking force Fg reaches the maximum regenerative force Fx.

公开(公告)号：US20210197785A1

公开(公告)日：2021-07-01

申请号：US17058405

申请日：2019-06-11

Applicant: ADVICS CO., LTD.

Inventor： Haruki HIRATA

IPC: B60T17/04

Abstract: A housing of brake device includes a first oil path, a second oil path that is adjacent to the first oil path in a first direction along an axial direction of the first oil path and has a larger cross-section orthogonal to the axial direction than the first oil path, a third oil path connected to the first oil path, and a fourth oil path connected to the second oil path. A throttle member of the brake device is anchored to the housing by being press-fitted into the first oil path. The third oil path connects the fourth oil path through the throttle. When the throttle member moves in the first direction by releasing the press-fitting, the third oil path connects the fourth oil path through a gap between an inner circumferential surface forming the second oil path and an outer circumferential surface of the throttle member.

公开(公告)号：US20210197779A1

公开(公告)日：2021-07-01

申请号：US17057716

申请日：2019-06-21

Applicant: ADVICS CO., LTD.

Inventor： Masaki MARUYAMA ,  Shunya WATANABE

IPC: B60T13/20 ,  B60T8/17 ,  B60T13/68

Abstract: A brake control device adjusts a hydraulic pressure in a wheel cylinder in response to an operation amount of a brake operation member, and includes “a pressure adjustment unit that includes an electric pump and a pressure adjustment valve and adjusts hydraulic pressure in a pressure adjustment fluid path between the electric pump and the pressure adjustment valve”, and “a controller that controls the electric pump and the pressure adjustment valve”. The controller calculates an operation speed equivalent amount based on the operation amount, calculates a target rotation speed based on the operation speed equivalent amount, and controls the electric pump such that an actual rotation speed of the electric pump approaches the target rotation speed.