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公开(公告)号：US20200262409A1
公开(公告)日：2020-08-20
申请号：US16647599
申请日：2018-09-18
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Naoki TAKAHASHI , Daisuke GOTO , Takaya TSUKAGOSHI , Norikazu MATSUZAKI , Hiroaki SATO
Abstract: An electric booster including an input member that is advanceably/retractably moved according to a brake pedal operation. An electric motor of an electric actuator advanceably/retractably moves a power piston. A master pressure control unit sets a target movement amount of the power piston according to an amount of a movement of the input member that is caused by the brake pedal, and controls the electric motor to move the power piston so as to achieve the target movement amount, thereby causing a brake hydraulic pressure to be generated in a master cylinder. The master pressure control unit includes a reaction force generation portion, which changes a characteristic of a hydraulic reaction force applied to the brake pedal. The reaction force generation portion corrects the target movement amount of the power piston according to a temporal change in the movement amount of the input member.
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Patent Agency Ranking
公开(公告)号：US20150217741A1
公开(公告)日：2015-08-06
申请号：US14605116
申请日：2015-01-26
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Masayuki KIKAWA , Shuji OHSHITA , Norikazu MATSUZAKI
IPC: B60T8/1761 , B60L7/18
CPC classification number: B60T8/1761 , B60L3/10 , B60L3/108 , B60L7/18 , B60L2240/465 , B60L2240/80 , B60T1/10 , B60T8/17616 , B60T8/321 , B60T8/4872 , B60T13/146 , B60T13/662 , B60T13/686 , B60T13/745 , B60T2270/602 , Y02T10/7258
Abstract: A brake control system is provided which can maintain, the behavior of a vehicle stable when wheels slip. A slip amount detector 56 configured to detect an amount of slip at wheels 2L, 2R, 3L, 3R is connected to a second ECU 35. A first ECU 27 has a regenerative slip control unit which executes repeatedly a slip restricting control in which while the front wheels 2L, 2R are being detected as slipping based on a detection value of the slip amount detector 56 during the execution of regenerative braking by a motor-generator 55, the amount of regenerative braking by the motor-generator 55 is reduced by a predetermined amount, and thereafter, the resulting reduced amount of regenerative braking is held for a predetermined period of time. In this case, the regenerative slip control, unit sets the predetermined reduction amount by which the amount of regenerative braking is reduced when the front wheels 2L, 2R are detected as slipping larger than a predetermined reduction amount by which the amount of regenerative braking is reduced in the slip restricting control which is executed subsequently.
Abstract translation: 提供一种制动控制系统，可以保持车轮滑动时车辆的行为稳定。 被配置为检测车轮2L，2R，3L，3R的滑移量的滑移量检测器56被连接到第二ECU35。第一ECU27具有再生滑移控制单元，其重复执行滑动限制控制，其中，当 在电动发电机55执行再生制动期间，前轮2L，2R被检测为基于滑移量检测器56的检测值而滑动，电动发电机55的再生制动量减少预定 量，然后将所得到的减少的再生制动量保持预定时间段。 在这种情况下，再生滑动控制单元设定当前轮2L，2R被检测为比可再生制动量减少的预定减少量大的滑动时再生制动量减少的预定减少量 在随后执行的滑差限制控制中。
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公开(公告)号：US20150061362A1
公开(公告)日：2015-03-05
申请号：US14469089
申请日：2014-08-26
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Masayuki KIKAWA , Norikazu MATSUZAKI , Kunihiro MATSUNAGA , Hiroshi SHIGETA , Kentaro UENO , Hiroshi FURUYAMA
CPC classification number: B60T13/662 , B60T7/042 , B60T7/06 , B60T8/368 , B60T8/4077 , B60T13/686 , B60T13/745
Abstract: When a driving force of a drive motor (21) becomes a maximum driving force even in the case where a brake pedal (5) is depressed by a large amount while a vehicle is in a stopped state, a second ECU (33) outputs a valve-closing command to a boost control valve (40, 40′) of an ESC (31) for a left front wheel (FL; front wheel 1L) and a right front wheel (FR; front wheel 1R). In this manner, a hydraulic pressure flowing from a master cylinder (8) through the ESC (31) to each wheel side is not supplied to wheel cylinders (3L, 3R) for the front wheels (1L, 1R) but is supplied only to wheel cylinders (4L, 4R) for rear wheels (2L, 2R). A hydraulic stiffness of the wheel cylinders (3L, 3R, 4L, 4R) is changed by stopping supply of a brake fluid to the wheel cylinders (3L, 3R).
Abstract translation: 即使在车辆处于停止状态时制动踏板（5）被大量踩下的情况下，当驱动马达（21）的驱动力变为最大驱动力时，第二ECU（33）输出 关闭指令到左前轮（FL;前轮1L）和右前轮（FR;前轮1R）的ESC（31）的升压控制阀（40,40'）。 以这种方式，从主缸（8）通过ESC（31）流向每个车轮侧的液压不被供给到用于前轮（1L，1R）的轮缸（3L，3R），而是仅供应到 用于后轮（2L，2R）的轮缸（4L，4R）。 通过停止向轮缸（3L，3R）供给制动液来改变轮缸（3L，3R，4L，4R）的液压刚度。
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4.发明申请公开(公告)号：US20210046909A1
公开(公告)日：2021-02-18
申请号：US16981374
申请日：2019-02-20
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Suguru SAOTOME , Norikazu MATSUZAKI , Masayuki KIKAWA , Naoki TAKAHASHI
Abstract: An electric brake system includes a hydraulic pressure control circuit configured to acquire a detected value from a hydraulic pressure detection portion configured to detect a hydraulic pressure in a master cylinder and control driving of an electric actuator in such a manner that a target hydraulic pressure corresponding to a braking instruction is generated in the master cylinder, a fluid amount control circuit configured to drive a fluid amount supply device disposed between the master cylinder and a wheel cylinder to control a fluid amount to supply to the wheel cylinder, and a storage circuit configured to store a fluid amount characteristic, which is a characteristic of the fluid amount with respect to the detected value. The fluid amount control circuit controls the fluid amount supply device based on the fluid amount characteristic stored in the storage circuit.
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公开(公告)号：US20180105156A1
公开(公告)日：2018-04-19
申请号：US15559960
申请日：2016-03-18
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Minoru KISHI , Norikazu MATSUZAKI
CPC classification number: B60T13/662 , B60T7/042 , B60T8/00 , B60T8/4077 , B60T8/96 , B60T13/686 , B60T13/745 , B60T2220/04 , B60T2270/82
Abstract: Even when downstream stiffness in a brake hydraulic circuit changes due to variation in a caliper forming a part of a wheel cylinder, temperature, wear degree, and deterioration of a frictional pad, and/or the like, a brake control apparatus performs calculation processing for calculating a switching reference operation amount, switching operation amount deviation calculation processing for calculating a deviation from the switching reference operation amount, operation amount offset processing for offsetting a pedal operation amount detected by an operation amount detection unit, target hydraulic pressure calculation processing for calculating the target hydraulic pressure with use of the offset operation amount and a reference hydraulic characteristic, and control of the electric motor (21) according to the target hydraulic pressure. By this configuration, the brake control apparatus limits an excessive movement amount of a primary piston by changing the reference hydraulic characteristic according to the change in the downstream stiffness.
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公开(公告)号：US20170297547A1
公开(公告)日：2017-10-19
申请号：US15512932
申请日：2016-03-18
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Daisuke GOTO , Norikazu MATSUZAKI
CPC classification number: B60T13/662 , B60T7/042 , B60T7/12 , B60T7/22 , B60T8/00 , B60T8/172 , B60T13/74 , B60T13/745 , B60T2201/022 , B60T2220/04
Abstract: A brake control device capable of suppressing a sense of discomfort felt by a driver. The brake control device (31) includes a braking command addition part (34A) for adding an automatic-brake braking command value (B) output from an automatic-brake braking command calculation part (32) and a pedal operation braking command value (A) output from a pedal operation braking command calculation part (34B). The pedal operation braking command calculation part includes a pedal operation braking command selection part (34B1), a normal brake characteristic part (34B2) for holding a normal brake characteristic, and an automatic brake characteristic part (34B3) for holding an automatic brake characteristic. The pedal operation braking command selection part selects a braking command value output from the automatic brake characteristic part when the automatic-brake braking command value is more than 0, and outputs the selection result to the braking command addition part as the pedal operation braking command value.
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