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公开(公告)号：US20190381982A1
公开(公告)日：2019-12-19
申请号：US16479105
申请日：2018-01-19
Applicant: ADVICS CO., LTD.
Inventor： Marshall BULL , Shun TSUKAMOTO
Abstract: This braking control device feeds by pressure a braking fluid from a master cylinder to a wheel cylinder, to generate a braking force in a wheel. The braking control device is provided with an input rod; an output rod; first and second electric motors; and first and second racks forming a differential mechanism. When the outputs of the first and second electric motors are controlled, the operation power of the input rod and the displacement of the output rod are controlled independently of each other. Here, in the second rack, the movement, in a backward direction, in response to decrease of a master cylinder fluid pressure is limited within a range of a predetermined displacement by means of two stoppers.
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公开(公告)号：US20190322265A1
公开(公告)日：2019-10-24
申请号：US16342264
申请日：2017-11-07
Applicant: ADVICS CO., LTD.
Inventor： Shun TSUKAMOTO , Shinichiro YUKOKU
Abstract: Provided is an electric braking device wherein a friction member is pressed, via a piston driven by an electric motor, against a rotary member that rotates integrally with a vehicle wheel, thus generating a braking force on the vehicle wheel. The electric braking device is provided with: a controller for controlling the electric motor; a rotation angle sensor for detecting a rotation angle of the electric motor; and a return mechanism for applying a return force to a piston in a direction away from the rotary member. Furthermore, the controller executes a proper/improper determination to determine whether the return mechanism is operating properly on the basis of a change in the rotation angle after conduction of electricity to the electric motor is stopped.
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公开(公告)号：US20180009420A1
公开(公告)日：2018-01-11
申请号：US15546128
申请日：2016-02-25
Applicant: ADVICS CO., LTD.
Inventor： Shun TSUKAMOTO , Koichi KOKUBO
CPC classification number: B60T8/171 , B60T1/005 , B60T7/12 , B60T8/00 , B60T8/17 , B60T8/172 , B60T13/74 , B60T13/741 , F16D55/226 , F16D63/006 , F16D65/18 , F16D65/183 , F16D66/00 , F16D2066/001 , F16D2121/24 , F16D2125/40
Abstract: Provided is an electric braking device that transmits power generated by an electric motor MTR to a pressing member PSN and causes pressing force to be generated by the pressing member PSN with respect to a friction member MSB. Hysteresis characteristics in the relation between the power supply amount to the electric motor and the pressing force of the pressing member are detected each time a predetermined point in time arrives. Upon determination of a “holding state in which the pressing force is held constant”, a minimum value for a power supply amount that makes it possible to maintain the current pressing force is obtained on the basis of the most recently detected hysteresis characteristics and the power supply amount is set to a value determined on the basis of the obtained minimum value for the power supply amount.
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Patent Agency Ranking
公开(公告)号：US20190202422A1
公开(公告)日：2019-07-04
申请号：US16325344
申请日：2017-08-30
Applicant: ADVICS CO., LTD.
Inventor： Hikaru KAWAMURA , Shun TSUKAMOTO
IPC: B60T8/1761 , B60T8/40 , B60T8/172 , B60T13/74
CPC classification number: B60T8/1761 , B60T8/17 , B60T8/172 , B60T8/40 , B60T13/74 , B60T13/745 , B60T2201/03 , H02M7/48
Abstract: The braking control device generates braking force by operating an electric motor to press a friction member against a wheel-fixed rotary member. The braking control device includes: a wheel speed sensor detecting wheel speed; a rotation angle sensor detecting a motor rotation angle; a drive circuit driving the motor; and a controller controlling the drive circuit. The controller sets a current limit circle within d-axis/q-axis current characteristics of the motor based on specifications of the drive circuit, calculates a voltage limit circle within the d-axis/q-axis current characteristics based on the rotation angle, executes slip suppression control for reducing the degree of wheel slip based on the wheel speed, calculates d-axis and q-axis target current values based on intersection points of the current limit circle and the voltage limit circle when execution of slip suppression control begins, and controls the drive circuit based on the d-axis and q-axis target current values.
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公开(公告)号：US20180215369A1
公开(公告)日：2018-08-02
申请号：US15546183
申请日：2016-02-25
Applicant: ADVICS CO., LTD.
Inventor： Shun TSUKAMOTO
CPC classification number: B60T13/745 , B60T7/206 , B60T8/885 , B60T13/662 , B60T13/74 , B60T13/741 , F16D65/18 , F16D2066/003 , F16D2066/005 , F16D2121/24 , F16D2125/40 , F16D2125/48 , F16D2127/06 , F16D2129/08
Abstract: This electric braking device transmits power generated by an electric motor to a pressing member and causes pressing force to be generated by the pressing member with respect to a friction member. The electric braking device includes a lock mechanism. A locked state (in which movement of a locked section in a direction in which pressing force decreases is impossible) is achieved in the lock mechanism by: performing “supplied power amount reduction control” in which the amount of power supplied to the electric motor is reduced while a locking member is maintained in a lockable position; causing the locked section to move in the direction in which pressing force decreases; and causing the locking member and the locked section to engage. When performing supplied power amount reduction control, the amount of power supplied is first reduced by a large reduction gradient and then reduced by a small reduction gradient.
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公开(公告)号：US20250042378A1
公开(公告)日：2025-02-06
申请号：US18836127
申请日：2023-03-08
Applicant: ADVICS CO., LTD.
Inventor： Shun TSUKAMOTO
IPC: B60T13/58
Abstract: A brake system includes electric braking devices. Each of the electric braking devices includes an electric motor. In the brake system, it is determined whether regenerative power is generated by the electric motors, and when it is determined that regenerative power is generated by any one of the electric motors, an electric motor other than the electric motor determined as generating regenerative power is driven so that a power consumption amount of the other electric motor is increased.
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公开(公告)号：US20180093653A1
公开(公告)日：2018-04-05
申请号：US15281820
申请日：2016-09-30
Applicant: ADVICS North America, Inc. , ADVICS CO., LTD.
Inventor： Marshall BULL , Shun TSUKAMOTO
CPC classification number: B60T11/18 , B60T1/10 , B60T7/042 , B60T8/4077 , B60T13/745
Abstract: A braking control device controllable in cooperation with a regenerative brake includes a case member fixed to the master cylinder, a first electric motor fixed to the case member, a second electric motor fixed to the case member independently of the first electric motor, a linearly movable input rod mechanically connected to the braking operation member, an output rod which presses pistons in the master cylinder and which is linearly movable in parallel with a central axis of the input rod, a differential mechanism which receives output from the first and second electric motors, is allowed to relatively move between the input rod and the output rod, and is built in the case member, and a controller which controls the output from the first electric motor and the output from the second electric motor to independently control force acting on the input rod and displacement of the output rod.
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公开(公告)号：US20180073584A1
公开(公告)日：2018-03-15
申请号：US15554050
申请日：2016-03-31
Applicant: ADVICS CO., LTD.
Inventor： Shun TSUKAMOTO , Koichi KOKUBO
CPC classification number: F16D65/14 , B60T1/005 , B60T1/06 , B60T1/062 , B60T8/00 , B60T8/17 , B60T13/74 , F16D63/006 , F16D65/18 , F16D2125/40 , F16D2125/48 , F16D2127/06
Abstract: In an electric braking device for a vehicle, the following are carried out in order: a first lock process in which either torque for shifting the ratchet gear in a release direction is generated in an electric motor or the driving of the electric motor is stopped, while a pawl member is being pressed against a ratchet gear; a second lock process in which the rotational angle of the ratchet gear is brought to an angle different from a semi-engaging rotational angle by driving the electric motor; and a third lock process in which the ratchet gear is rotated in the release direction by driving the electric motor in reverse.
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