公开(公告)号：US11738726B2

公开(公告)日：2023-08-29

申请号：US16499146

申请日：2018-03-29

Applicant: NISSIN KOGYO CO., LTD. ,  VEONEER NISSIN BRAKE SYSTEMS JAPAN CO., LTD. ,  MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA ,  NTN CORPORATION

Inventor： Hiromasa Satoh ,  Toshihiro Obika ,  Yusuke Koga ,  Yasushi Aoki ,  Hiromitsu Toyota ,  Haruo Kotera ,  Tatsuya Yamasaki ,  Yui Masuda

IPC: B60T8/17 ,  B60T13/74 ,  B60T17/22

CPC classification number: B60T8/17 ,  B60T13/74 ,  B60T17/221 ,  B60T2270/402 ,  B60T2270/413

Abstract: A vehicle brake system (1) includes a first control device (10) and a second control device (11) that respectively include a master controller (30), a first sub-controller (40), and a second sub-controller (41) that are connected to one another. Each of the master controller (30), the first sub-controller (40), and the second sub-controller (41) includes a braking force calculation unit that calculates braking force of electric brakes (16a to 16d), and a determination unit that compares braking force calculation results of the controllers to determine whether itself is normal. The determination unit includes an output block section that blocks, when the determination unit determines that any one of the controllers is not normal, an output of the controller that is determined to be not normal.

公开(公告)号：US10479342B2

公开(公告)日：2019-11-19

申请号：US15825936

申请日：2017-11-29

Applicant: NTN CORPORATION

Inventor： Yui Masuda ,  Tatsuya Yamasaki

IPC: B60T17/22 ,  B60T8/172 ,  B60T13/74 ,  F16D65/18 ,  F16D66/00 ,  F16D121/24

Abstract: The electric brake device includes an electric motor, a friction member operator, a friction member, a brake rotor, and a control device. A braking force estimator provided in the control device includes: a direct estimator configured to convert output of a braking force sensor which detects a load or displacement corresponding amount, to a braking force; and an indirect estimator configured to estimate the braking force on the basis of information other than output of the braking force sensor. A range in which the braking force is estimated by the direct estimator is a specified low-braking-force range, and in a range beyond this range, estimation of the braking force is performed by the indirect estimator.

公开(公告)号：US10228034B2

公开(公告)日：2019-03-12

申请号：US14423440

申请日：2013-08-27

Applicant: NTN CORPORATION

Inventor： Tatsuya Yamasaki

IPC: F16H25/22 ,  F16D65/14 ,  F16D65/18 ,  F16D125/40 ,  F16H25/20 ,  F16D121/24 ,  F16D125/48 ,  F16D125/50

Abstract: An electric linear motion actuator includes an outer ring member provided around a central shaft, and planetary rollers disposed between the central shaft and the outer ring member. One of the central shaft and the outer ring member serves as an input member which is rotatable and immovable in the axial direction and rotated by an electric motor, while the other serves as an output member which is rotationally stationary and movable in the axial direction. The input member has a peripheral surface formed with a plurality of annular ribs which are equal in pitch. Each planetary roller has a radially outer surface formed with annular grooves which are equal in pitch to the annular ribs and in which the annular ribs are engaged. The output member has a peripheral surface formed with a helical rib which is equal in pitch to the annular grooves of the planetary rollers.

公开(公告)号：US20180194333A1

公开(公告)日：2018-07-12

申请号：US15915845

申请日：2018-03-08

Applicant: NTN CORPORATION

Inventor： Akiyoshi NISHIKAWA ,  Tatsuya Yamasaki

IPC: B60T8/172 ,  B60T13/74 ,  B60T8/171 ,  B60T7/04 ,  B60T8/32

CPC classification number: B60T8/172 ,  B60T7/042 ,  B60T8/00 ,  B60T8/171 ,  B60T8/32 ,  B60T13/74 ,  B60T13/741 ,  B60T2201/12 ,  B60T2220/04

Abstract: Provided is an electric brake device capable of adjusting a clearance without making a driver feel discomfort, in a vehicle equipped with the electric brake device. A control device (2) of this electric brake device (DB) includes: a brake operation amount detector (24) to detect an operation amount to a brake operation member (27) of the vehicle; and an operation record flag storage unit (19) to store an operation record flag indicating a record of a latest operation performed by the driver to the brake operation member (27), on the basis of the operation amount detected by the brake operation amount detector (24). The control device (2) further includes a target clearance determination unit (17) to determine a target clearance with reference to the operation record flag stored in the operation record flag storage unit (19).

公开(公告)号：US09970499B2

公开(公告)日：2018-05-15

申请号：US14896050

申请日：2014-06-12

Applicant: NTN CORPORATION

Inventor： Tatsuya Yamasaki ,  Makoto Muramatsu ,  Yui Masuda

IPC: F16D55/226 ,  F16D65/18 ,  H02K7/06 ,  H02K7/116 ,  F16D55/225 ,  F16H25/22 ,  F16H25/24 ,  F16D121/24 ,  F16D125/50

CPC classification number: F16D65/18 ,  F16D55/225 ,  F16D65/183 ,  F16D2121/24 ,  F16D2125/50 ,  F16H25/2252 ,  F16H25/2454 ,  H02K7/06 ,  H02K7/116

Abstract: The electric linear motion actuator includes an electric motor, a drive shaft configured to be rotated by the electric motor, a rotation-to-linear motion converting mechanism configured to convert the rotational motion of the drive shaft to the axial linear motion of an axially movably supported outer ring member, and an electric locking mechanism incorporated in a reduction gear mechanism in which the rotation of a rotor shaft of the electric motor is reduced in speed and transmitted to the drive shaft. When the electric locking mechanism is energized, the power transmission path shifts to the locked state in which power cannot be transmitted, and when the electric locking mechanism is de-energized thereafter, the power transmission path is kept in the locked state. The electric locking mechanism is built in a motor case of the electric motor so that the electric motor and the electric locking mechanism are unitized.