Hydraulic brake system
US-12036968-B2 · Jul 16, 2024 · US
Braking control device for vehicles
US2025333034A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2025333034-A1 |
| Application number | US-202318857372-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 27, 2023 |
| Priority date | Apr 27, 2022 |
| Publication date | Oct 30, 2025 |
| Grant date | — |
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- Title
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Abstract
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A braking control device includes a fluid pump driven by an electric motor via a coupling part, a differential pressure valve provided in a fluid path connecting a discharge part and an intake part of the fluid pump, the differential pressure valve increasing a wheel pressure of a wheel cylinder by increasing a braking liquid discharged from the fluid pump to an output pressure, and a controller that drives the electric motor and the differential pressure valve. When a valve opening amount of the differential pressure valve is reduced in a state in which the electric motor is driven, the controller performs an appropriateness determination as to whether or not the coupling part is normal based on a change in a state quantity related to the electric motor.
First claim
Opening claim text (preview).
1 . A braking control device for vehicles comprising: a fluid pump driven by an electric motor via a coupling part; a differential pressure valve provided in a fluid path connecting a discharge part of the fluid pump and an intake part of the fluid pump, the differential pressure valve increasing a wheel pressure of a wheel cylinder by increasing a braking liquid discharged from the fluid pump to an output pressure; and a controller that drives the electric motor and the differential pressure valve; wherein when a valve opening amount of the differential pressure valve is reduced in a state in which the electric motor is driven, the controller performs an appropriateness determination as to whether or not the coupling part is normal based on a change in a state quantity related to the electric motor. 2 . A braking control device for vehicles comprising: a fluid pump driven by an electric motor via a coupling part; a differential pressure valve provided in a fluid path connecting a discharge part of the fluid pump and an intake part of the fluid pump, the differential pressure valve increasing a wheel pressure of a wheel cylinder by increasing a braking liquid discharged from the fluid pump to an output pressure; wherein a controller that drives the electric motor and the differential pressure valve; wherein when a valve opening amount of the differential pressure valve is reduced in a state in which a rotation number of the electric motor is controlled to be a constant rotation number, the controller performs an appropriateness determination as to whether or not the coupling part is normal based on an increase in an output equivalent value equivalent to an output of the electric motor. 3 . The braking control device for vehicles according to claim 2 , wherein the controller determines that the coupling part is normal when the output equivalent value is greater than or equal to a determination threshold value. 4 . A braking control device for vehicles comprising: a fluid pump driven by an electric motor via a coupling part; a differential pressure valve provided in a fluid path connecting a discharge part of the fluid pump and an intake part of the fluid pump, the differential pressure valve increasing a wheel pressure of a wheel cylinder by increasing a braking liquid discharged from the fluid pump to an output pressure; and a controller that drives the electric motor and the differential pressure valve; wherein when a valve opening amount of the differential pressure valve is reduced in a state in which a constant current is supplied to the electric motor, the controller performs an appropriateness determination as to whether or not the coupling part is normal based on a decrease in rotation number of the electric motor. 5 . (canceled) 6 . (canceled) 7 . (canceled) 8 . (canceled) 9 . (canceled) 10 . The braking control device for vehicles according to claim 4 , wherein the controller determines that the coupling part is normal when the rotation number is less than or equal to a determination rotation number.
Assignees
Inventors
Classifications
in hydraulic systems or parts thereof · CPC title
Part of the system directly actuated by booster pressure · CPC title
characterised by specified functions of the control system components · CPC title
- B60T13/148Primary
Arrangements for pressure supply · CPC title
In combination with distributor valve · CPC title
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Frequently asked questions
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- What does patent US2025333034A1 cover?
- A braking control device includes a fluid pump driven by an electric motor via a coupling part, a differential pressure valve provided in a fluid path connecting a discharge part and an intake part of the fluid pump, the differential pressure valve increasing a wheel pressure of a wheel cylinder by increasing a braking liquid discharged from the fluid pump to an output pressure, and a controlle…
- Who is the assignee on this patent?
- Advics Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B60T13/148. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Oct 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).