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1.发明公开公开(公告)号：US20240166177A1
公开(公告)日：2024-05-23
申请号：US18282611
申请日：2022-03-07
Applicant: Hitachi Astemo, Ltd.
Inventor： Suguru SAOTOME , Hirohito TADA , Norikazu MATSUZAKI , Masayuki KIKAWA
CPC classification number: B60T8/172 , B60T8/171 , B60T13/588 , B60T13/746 , H02P3/04 , B60T13/145
Abstract: In an application, which refers to holding actuation of a parking brake mechanism (a rotation-linear motion conversion mechanism), a braking control apparatus (a parking brake control apparatus) determines an application stroke from a load detection point including as far as an overshoot amount. The load detection point is a generation point of a thrust force that is detected due to a current flowing in the electric motor. The overshoot amount is generated based on a rotation of an electric motor due to inertia after driving of the electric motor is stopped. The braking control apparatus determines a target release stroke in a release, which is release actuation of the parking brake mechanism, according to the application stroke. The braking control apparatus outputs a control instruction to conduct the release based on the target release stroke.
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Patent Agency Ranking
公开(公告)号：US20230174036A1
公开(公告)日：2023-06-08
申请号：US17439264
申请日：2020-05-26
Applicant: Hitachi Astemo, Ltd.
Inventor： Suguru SAOTOME , Norikazu MATSUZAKI , Masayuki KIKAWA
IPC: B60T13/14 , B60T8/1761 , B60T13/58 , B60T13/74
CPC classification number: B60T13/147 , B60T8/17616 , B60T13/58 , B60T13/741 , B60T13/745 , B60T2270/10 , B60T2201/06 , B60T8/1755
Abstract: An ESC 33 increases distribution of a braking force to rear wheels according to a reduction in a speed of a vehicle due to braking, and distributes the braking force so as to allow the vehicle to be kept stopped due to braking forces applied to the rear wheels when the vehicle stopped. Then, a second ECU holds the braking force by driving a parking mechanism with the vehicle kept stopped due to the braking forces applied to the rear wheels.
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公开(公告)号：US20230126047A1
公开(公告)日：2023-04-27
申请号：US17911295
申请日：2021-03-24
Applicant: Hitachi Astemo, Ltd.
Inventor： Daisuke KOJIMA , Norikazu MATSUZAKI , Masayuki KIKAWA
Abstract: Provided is a parking brake control device configured to, when releasing a hold on a braking force, energize an electric motor, and change a drive time of the electric motor in accordance with a current change amount in a predetermined interval after a predetermined time has elapsed since a current value of the electric motor starts to decrease after increasing and a current value at which the current change amount of the electric motor converges to a predetermined value or less.
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4.发明公开公开(公告)号：US20240166178A1
公开(公告)日：2024-05-23
申请号：US18283078
申请日：2022-03-09
Applicant: Hitachi Astemo, Ltd.
Inventor： Masayuki KIKAWA , Norikazu MATSUZAKI , Naoshi YAMAGUCHI
IPC: B60T8/172 , B60T1/06 , B60T8/171 , B60T13/74 , F16D55/226 , F16D65/18 , F16D121/04 , F16D121/24 , F16D125/06
CPC classification number: B60T8/172 , B60T1/065 , B60T8/171 , B60T13/746 , F16D55/226 , F16D65/18 , B60T2220/04 , F16D2121/04 , F16D2121/24 , F16D2125/06
Abstract: A parking brake control apparatus acquires a first physical amount indicating a change in a current applied to an electric motor (for example, a gradient of a change in a current) at the time of an application operation. The parking brake control apparatus sets a second physical amount indicating completion of the application operation so as to make it smaller when the first physical amount (for example, the gradient of the change in the current) exceeds a predetermined threshold value, compared to when the first physical amount is equal to or smaller than the threshold value. The parking brake control apparatus determines the completion of the application operation when a physical amount indicating the application operation (for example, a current value) reaches the second physical amount.
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公开(公告)号：US20240157917A1
公开(公告)日：2024-05-16
申请号：US18281617
申请日：2021-10-15
Applicant: Hitachi Astemo, Ltd.
Inventor： Tatsuro KOBUNE , Norikazu MATSUZAKI , Masayuki KIKAWA
CPC classification number: B60T8/171 , B60T8/172 , B60T13/746 , F16D65/18 , H02P3/04 , F16D2121/24
Abstract: A parking brake control apparatus (24) stops driving of an electric motor (7A) when a current value of the electric motor (7A) reaches a target current threshold value, when driving the electric motor (7A) to press brake pads (6C) against a disk rotor (4) and hold a braking force. The target current threshold value is a current value for stopping the driving of the electric motor (7A). The parking brake control apparatus (24) changes the target current threshold value according to a rotational acceleration of the electric motor (7A).
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公开(公告)号：US20230227017A1
公开(公告)日：2023-07-20
申请号：US17928793
申请日：2021-05-13
Applicant: Hitachi Astemo, Ltd.
Inventor： Shunsuke ARITOMI , Shinji SETO , Norikazu MATSUZAKI , Kimio NISHINO , Daisuke KOJIMA
CPC classification number: B60T13/74 , H02P29/40 , B60T13/662
Abstract: Accurately controlling pressing thrust regardless of an individual difference and a use situation of a brake apparatus, and the like are set forth herein. The present invention controls a motor that applies thrust to a piston that presses a brake pad, in a current variation period before an idling current period, a variation in the current and the voltage or a variation in a function including the current and the voltage in the idling current period is computed as a plurality of prospective values. At a predetermined time T0 during the current variation period, one of the plurality of prospective values is selected on the basis of the current and the voltage, and on the basis of the variation in the current and the voltage or the function related to the selected prospective value, a characteristic parameter of the motor is computed to compute a stop current of the motor.
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