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公开(公告)号：US10850718B2
公开(公告)日：2020-12-01
申请号：US16313588
申请日：2017-05-26
发明人： Daisuke Goto , Takuya Usui
IPC分类号： B60T13/74 , B60T8/17 , B60T7/04 , B60T7/12 , B60T8/171 , B60T8/172 , B60T8/40 , B60T13/66 , B60T7/22
摘要： An electric brake apparatus includes an electronic control unit (ECU) configured to move a power piston to cause a braking hydraulic pressure to be generated in a master cylinder by controlling an electric motor of an electric actuator based on an operation on a brake pedal (an input member position). A characteristic update processing portion of the ECU is configured to update, based on an operation amount of the brake pedal, characteristic data indicating a relationship between a hydraulic value transmitted from the ECU via a vehicle data bus and a movement amount of the power piston controlled based on the input member position, and store the updated characteristic data. The ECU is configured to control the electric actuator based on the updated characteristic data when an automatic brake instruction is input.
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公开(公告)号：US11967912B2
公开(公告)日：2024-04-23
申请号：US17261642
申请日：2019-06-17
IPC分类号： H02P23/14 , B60T1/06 , B60T13/74 , F16D65/18 , F16D121/24 , F16D125/20 , H02P23/00 , H02P23/12 , H03H17/02
CPC分类号： H02P23/14 , B60T1/065 , B60T13/746 , F16D65/18 , H02P23/0022 , H02P23/12 , H03H17/0202 , F16D2121/24 , F16D2125/20 , H03H2017/0205
摘要： 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：US11465599B2
公开(公告)日：2022-10-11
申请号：US16763806
申请日：2018-10-05
摘要： A brake system capable of accurately controlling a braking force includes a first and second brake devices that have different control accuracies, and a brake control device that controls a braking force of the first and second braking devices according to a required braking force. The brake control device has a first control mode in which the braking force of the first brake device is controlled to be smaller than the braking force of the second brake device, and a second control mode in which the braking force of the first brake device is increased rather than the first control mode. The second brake device is controlled so that a sum of the braking force of the first brake device and the braking force of the second brake device matches the required braking force.
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公开(公告)号：US10065622B2
公开(公告)日：2018-09-04
申请号：US14037832
申请日：2013-09-26
摘要： A second ECU determines whether or not there is an abnormality in a hydraulic-pressure sensor in a first cycle based on a detection value of the hydraulic-pressure sensor, and outputs a signal indicating a determination of an occurrence of the abnormality to a first ECU via a signal line when determining the occurrence of the abnormality in the hydraulic-pressure sensor. The first ECU receives the detection value of the hydraulic-pressure sensor through communication from the second ECU via the signal line to determine whether or not there is the abnormality in the hydraulic-pressure sensor in a second cycle that is shorter than the first cycle. When determining that the hydraulic-pressure sensor is abnormal, the first ECU controls driving of an electric actuator based on a braking command from an operation-amount detection sensor without using the detection value of the hydraulic-pressure sensor determined to be abnormal.
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公开(公告)号：US11958459B2
公开(公告)日：2024-04-16
申请号：US17055515
申请日：2019-03-18
CPC分类号： B60T8/171 , B60T1/065 , B60T13/746 , B60T17/221
摘要： 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：US11932224B2
公开(公告)日：2024-03-19
申请号：US17283914
申请日：2019-08-15
发明人： Kyoshiro Itakura , Toshiyuki Ajima , Takahiro Ito , Kenichiro Matsubara , Daisuke Goto , Makoto Matsuura
IPC分类号： B60T8/00 , B60T1/00 , B60T8/172 , B60T13/74 , B60T17/22 , F16D65/14 , F16D65/18 , B60T1/06 , F16D66/00 , F16D121/24
CPC分类号： B60T8/172 , B60T13/746 , B60T17/221 , F16D65/183 , B60T1/065 , B60T2201/03 , F16D2066/005 , F16D2121/24
摘要： 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：US11926296B2
公开(公告)日：2024-03-12
申请号：US16970829
申请日：2019-02-13
IPC分类号： B60T13/74 , B60T1/06 , B60T8/17 , B60T17/22 , F16D55/226 , F16D65/18 , F16D121/24 , F16D125/40
CPC分类号： B60T13/746 , B60T1/065 , B60T8/17 , B60T17/221 , F16D55/226 , F16D65/18 , B60T2270/40 , B60T2270/406 , F16D2121/24 , F16D2125/40
摘要： 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：US11407396B2
公开(公告)日：2022-08-09
申请号：US16647599
申请日：2018-09-18
摘要： 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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公开(公告)号：US10259438B2
公开(公告)日：2019-04-16
申请号：US15512932
申请日：2016-03-18
发明人： Daisuke Goto , Norikazu Matsuzaki
摘要： 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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公开(公告)号：US10137872B2
公开(公告)日：2018-11-27
申请号：US15740259
申请日：2016-06-08
发明人： Daisuke Goto
IPC分类号： B60T8/17 , B60T8/1769 , B60T8/00 , B60W30/18 , B60W30/182 , B60L7/18 , B60L15/20
摘要： An acceleration/deceleration control apparatus includes a mode switching portion configured to switch a normal mode of performing acceleration control in response to an operation on an accelerator pedal and also performing deceleration control in response to an operation on a brake pedal, and a one-pedal mode of performing both the acceleration control and the deceleration control in response to the operation on the accelerator pedal according to a switching operation performed by a driver. Where a mode is switched from the normal mode to the one-pedal mode, one-pedal instruction switching portion (35B) of the acceleration/deceleration control apparatus outputs such one-pedal acceleration/deceleration instruction value A(Xa) that a result of adding a non-one-pedal acceleration instruction value B1(Xb) for the one-pedal mode and a one-pedal acceleration instruction value Ab(Xa) for the one-pedal mode after the mode is switched matches non-one-pedal deceleration instruction value Bn(xb) for the normal mode before the mode is switched.
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