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公开(公告)号：US20210265936A1
公开(公告)日：2021-08-26
申请号：US17261642
申请日：2019-06-17
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Hiroaki SATO , Toshiyuki AJIMA , Kenichiro MATSUBARA , Daisuke GOTO
Abstract: An object of the present invention is to provide a motor control device capable of estimating a delay with high accuracy even in a case where there is a fluctuation in disturbance torque or delay time and of suppressing the influence of the delay. For this end, the present invention includes a motor MTR, an ECU 2 that controls the rotation of the motor MTR, and an ECU 1 that sends a torque command to the ECU 2 based on a command value. The ECU 1 includes a disturbance estimation block 100 and a delay estimation block 200. The disturbance estimation block 100 estimates disturbance torque (τd) using a torque command input to the ECU 2 and a feedback value of the motor MTR. The delay estimation block 200 estimates a delay using a torque command output from the ECU 1, the feedback value of the motor MTR, and the disturbance torque (τd).
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公开(公告)号：US20200377070A1
公开(公告)日：2020-12-03
申请号：US16970829
申请日：2019-02-13
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Wataru YOKOYAMA , Daisuke GOTO , Kenichiro MATSUBARA
Abstract: An electric brake comprises a brake mechanism that transmits a thrust generated by driving an electric motor to a piston that moves brake pads pressed against a disc rotor; a thrust sensor that detects the thrust applied to the piston; a rotation angle sensor that detects a rotational position of the electric motor; and a rear electric brake ECU that controls the driving of the electric motor on the basis of a braking command. The rear electric brake ECU detects an abnormality in the brake mechanism from a detected value of the thrust sensor and a detected value of the rotation angle sensor in response to the braking command which are obtained when the electric motor is driven.
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公开(公告)号：US20180072285A1
公开(公告)日：2018-03-15
申请号：US15560290
申请日：2016-03-22
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yuki TANAKA , Wataru YOKOYAMA , Kimio NISHINO , Masayoshi OKAMIYA , Kenichiro MATSUBARA
CPC classification number: B60T8/172 , B60T13/586 , B60T13/74 , B60T13/741 , B60T2220/04 , B60T2270/89 , F16D55/226 , F16D65/183 , F16D2121/04 , F16D2121/14 , F16D2121/24 , F16D2125/08 , F16D2125/40
Abstract: A parking brake control apparatus 20 drives an electric motor 43B to advance a piston 39 according to an application request signal from a parking brake switch 19. The parking brake control apparatus 20 includes a running state detection portion that calculates a running state about whether a vehicle is running or stopped based on a wheel signal from a wheel speed sensor 18. When the running state cannot be calculated by the running state detection portion, the parking brake control apparatus 20 controls the electric motor 43B in such a manner that the thrust force of the piston 39 changes at a lower time rate of change than when the running state can be calculated.
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公开(公告)号：US20160032995A1
公开(公告)日：2016-02-04
申请号：US14813593
申请日：2015-07-30
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Kimio NISHINO , Kenichiro MATSUBARA , Wataru YOKOYAMA , Tatsuro KOBUNE , Hirotaka OIKAWA
IPC: F16D65/18 , F16D55/225
CPC classification number: F16D65/18 , F16D55/225 , F16D55/226 , F16D2055/0016 , F16D2121/04 , F16D2121/24 , F16D2121/26 , F16D2125/40
Abstract: A brake apparatus comprising: a caliper having a piston configured to move a brake pad to be pressed on a disc rotor rotating with a wheel; a thrust retaining mechanism located in the caliper to thrust the piston and maintain braking force exerted by the thrust piston; an electric motor mounted on the caliper to operate the thrust retaining mechanism; and a controller configured to apply electric current to the electric motor in response to an application command or a release command, thereby perform control according to the commands, wherein the controller, upon receiving a release command, configured to operate the electric motor to reduce braking force exerted by the piston by performing current maintenance control which continuously applies electric current to the electric motor and switching control which successively switches between a larger and a smaller amount of electric current applied to the electric motor.
Abstract translation: 一种制动装置，包括：制动钳，具有活塞，所述活塞构造成将制动衬块移动到用轮旋转的盘式转子上; 位于卡钳中的推力保持机构，以推动活塞并保持由推力活塞施加的制动力; 安装在所述卡钳上以操作所述止推机构的电动马达; 以及控制器，被配置为响应于应用命令或释放命令向电动机施加电流，从而根据命令执行控制，其中控制器在接收到释放命令时被配置为操作电动机以减少制动 通过执行连续地向电动机施加电流的电流维持控制和继续在施加到电动机的较大量和较小量的电流之间切换的开关控制来施加的活塞的力。
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公开(公告)号：US20150274139A1
公开(公告)日：2015-10-01
申请号：US14668172
申请日：2015-03-25
Applicant: Hitachi Automotive Systems, Ltd. , Mazda Motor Corporation
Inventor： Michiharu OKADA , Shigeyuki UEHARA , Kenji HASHIDA , Wataru YOKOYAMA , Kenichiro MATSUBARA
CPC classification number: B60T8/17 , B60T7/10 , B60T8/172 , B60T8/885 , B60T13/741 , B60T2270/402 , F16D55/226 , F16D2121/24
Abstract: An electric brake apparatus includes an electric actuator configured to actuate a brake mechanism according to an actuation request signal, and an actuator controller configured to control an operation of the electric actuator with use of a power source mounted at a vehicle to perform control of holding and a release of braking by the brake mechanism. When a system recovers and the actuator controller detects that the control of the holding or the release has been interrupted with an uncompleted control state since system down occurred in the middle of the control of the holding or the release of the braking by the brake mechanism, the actuator controller maintains the interrupted state until a new actuation request signal is issued, and controls the operation of the electric actuator according to the content of the new actuation request signal.
Abstract translation: 一种电动制动装置，包括：电动致动器，其被构造成根据致动请求信号来致动制动机构;以及致动器控制器，被配置为使用安装在车辆上的电源来控制所述电动致动器的操作，以执行保持和 通过制动机构释放制动。 当系统恢复并且致动器控制器检测到由于在通过制动机构的保持或释放制动的控制的中间发生系统故障时，保持或释放的控制已经被中断，在未完成的控制状态下， 致动器控制器保持中断状态，直到发出新的致动请求信号，并且根据新的致动请求信号的内容来控制电致动器的操作。
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Patent Agency Ranking
公开(公告)号：US20220001845A1
公开(公告)日：2022-01-06
申请号：US17283914
申请日：2019-08-15
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Kyoshiro ITAKURA , Toshiyuki AJIMA , Takahiro ITO , Kenichiro MATSUBARA , Daisuke GOTO , Makoto MATSUURA
Abstract: An object of the present invention is to provide a brake control device and a brake system capable of braking with a shortened braking response when shifting from non-braking to braking. A brake control device 10 includes a command value calculation unit 4 that calculates an operation command value required to make a pressing force by which a brake pad 11a is pressed against a brake disc 11b reach a target thrust value. The command value calculation unit 4 includes: a clearance command calculation unit 43 that calculates a command value required for contact between the brake pad 11a and the brake disc 11b; and a thrust command calculation unit 40 that calculates a command value required for reaching the target thrust from a state where the brake pad 11a and the brake disc 11b are in contact with each other. When calculating the operation command value from a state where the brake pad 11a and the brake disc 11b are separated, the command value calculation unit 4 calculates the operation command value by integrating the command value calculated from the clearance command calculation unit 43 and the command value calculated from the thrust command calculation unit 40.
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公开(公告)号：US20170355356A1
公开(公告)日：2017-12-14
申请号：US15539841
申请日：2015-12-25
Applicant: Mazda Motor Corporation , Hitachi Automotive Systems, Ltd.
Inventor： Michiharu OKADA , Shigeyuki UEHARA , Tatsuro KOBUNE , Wataru YOKOYAMA , Kimio NISHINO , Kenichiro MATSUBARA
IPC: B60T8/1761 , B60T7/06 , B60T7/04 , B60T13/74 , F16D65/18 , F16D125/50 , F16D121/24 , F16D66/00
CPC classification number: B60T8/17613 , B60T7/042 , B60T7/06 , B60T8/00 , B60T8/1761 , B60T8/32 , B60T13/74 , B60T13/741 , B60T13/745 , B60T13/746 , F16D65/183 , F16D2066/003 , F16D2121/24 , F16D2125/50
Abstract: Provided is a brake device capable of maintaining pads and a rotor in a desired positional relationship. When receiving a release request within a time period from start of execution of an application request to detection of contact between brake pad and a disc rotor, a parking brake control device inhibits execution of the release request, and executes the release request after detection of the contact between the brake pad and the disc rotor. Further, when receiving the application request within a time period from start of execution of the release request to detection of separation between the brake pad and the disc rotor, the parking brake control device inhibits execution of the application request, and executes the application request after detection of the separation between the brake pad and the disc rotor.
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公开(公告)号：US20160339888A1
公开(公告)日：2016-11-24
申请号：US15111375
申请日：2014-12-26
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Wataru YOKOYAMA , Kimio NISHINO , Kenichiro MATSUBARA , Hiroshi CHIKUMA , Kenji HASHIDA
CPC classification number: B60T13/662 , B60T7/042 , B60T13/588 , B60T13/741 , F16D55/226 , F16D65/18 , F16D2121/24
Abstract: A parking brake controller 19 activates an electric actuator 43 in response to operation of a parking switch 18 to hold a disc brake 31 to serve as a parking brake. If a failure (fault) is detected in the parking switch 18, the parking brake controller 19 activates the electric actuator 43 so as to hold the parking brake automatically upon detecting a condition that presumes the vehicle operator's intent not to drive any longer while the vehicle is at rest.
Abstract translation: 驻车制动控制器19响应于停车开关18的操作而启动电动执行器43，以将盘式制动器31保持为驻车制动器。 如果在停车开关18中检测到故障（故障），则驻车制动控制器19启动电动执行机构43，以便在车辆检测到车辆操作者的意图不再驱动的状态下自动保持驻车制动器 正在休息
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公开(公告)号：US20210197777A1
公开(公告)日：2021-07-01
申请号：US17055515
申请日：2019-03-18
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Kyoshiro ITAKURA , Toshiyuki AJIMA , Kenichiro MATSUBARA , Daisuke GOTO
Abstract: An object of the present invention is to appropriately control a clearance amount by correcting an estimation error of a contact position caused by a delay time difference between output signals of sensors, and to establish both improvement of fuel efficiency due to prevention of drag of a brake pad during non-braking and reduction in response time during braking.
A brake system includes a brake disc, a brake pad, a piston, a drive mechanism, a position sensor that detects a position of the piston, a thrust sensor that detects a thrust by which the brake pad presses the brake disc, and a brake control unit that adjusts a braking force by controlling the drive mechanism. The brake control unit includes a contact position computation unit that computes a contact position at which the brake pad and the brake disc come in contact with each other based on output signals of the position sensor and the thrust sensor, a position error computation unit that computes a position error of the contact position based on a delay time difference between the output signals of the position sensor and the thrust sensor, and a contact position correction unit that corrects the contact position obtained by the contact position computation unit by using the position error.-
公开(公告)号：US20210039631A1
公开(公告)日：2021-02-11
申请号：US16979765
申请日：2018-10-10
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Takahiro ITO , Kenichiro MATSUBARA , Wataru YOKOYAMA , Takaya TSUKAGOSHI
IPC: B60W30/04 , B60T7/12 , B60T8/1766 , B60T8/30
Abstract: A vehicle control device, a vehicle control method, and a vehicle suitable for an automatic/manual driving mode vehicle that employs brakes capable of controlling braking forces of four wheels. A vehicle control device including a pitch angle adjustment unit that adjusts a pitch angle, which is an inclination of a vehicle generated in the vehicle when braking the vehicle, or a change amount of the pitch angle, the pitch angle adjustment unit adjusting the pitch angle according to a traveling mode of the vehicle instructed by a host controller provided in the vehicle.
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