公开(公告)号：US11407396B2

公开(公告)日：2022-08-09

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

IPC: B60T13/74 ,  B60T8/32 ,  B60T13/66 ,  B60T7/04

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.

公开(公告)号：US10407039B2

公开(公告)日：2019-09-10

申请号：US15559960

申请日：2016-03-18

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Minoru Kishi ,  Norikazu Matsuzaki

IPC: B60T13/66 ,  B60T8/00 ,  B60T7/04 ,  B60T13/68 ,  B60T13/74 ,  B60T8/40 ,  B60T8/96

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.

公开(公告)号：US10259438B2

公开(公告)日：2019-04-16

申请号：US15512932

申请日：2016-03-18

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Daisuke Goto ,  Norikazu Matsuzaki

IPC: B60T7/04 ,  B60T7/12 ,  B60T7/22 ,  B60T8/00 ,  B60T13/66 ,  B60T13/74 ,  B60T8/172

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.

公开(公告)号：US09463782B2

公开(公告)日：2016-10-11

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 ,  B60T1/10 ,  B60T13/14 ,  B60T13/66 ,  B60T13/68 ,  B60T13/74 ,  B60T8/32 ,  B60T8/48

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 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 the front and rear wheels, 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 are being detected as slipping based on a detection value of the slip amount detector during the execution of regenerative braking by a motor-generator (55), the amount of regenerative braking by the motor-generator is reduced by a predetermined amount, and thereafter, the resulting reduced amount of regenerative braking is held for a predetermined period of time. The regenerative slip control unit sets the predetermined reduction amount larger than a predetermined reduction amount by which the amount of regenerative braking is reduced in the slip restricting control.

Abstract translation: 一种制动控制系统，其可以在车轮滑动时保持车辆的行为稳定。 配置成检测前轮和后轮的滑动量的滑移量检测器（56）连接到第二ECU（35）。 第一ECU（27）具有再生滑移控制单元，其重复执行滑差限制控制，其中，在通过电动机执行再生制动期间，基于滑移量检测器的检测值检测前轮被检测为滑动 - 发电机（55），通过电动发电机的再生制动量减少预定量，然后将所得到的再生制动减少量保持预定时间。 再生滑移控制单元将预定的减小量设定为大于在滑差限制控制中再生制动量减少的预定减小量。