# US 11,299,135 B2 · Vehicle brake control device

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- Number: US 11,299,135 B2
- Document ID: US11299135B2
- Status: Granted
- Kind: B2
- Application number: 16/641,929
- Filed: 2018-09-26
- Published: 2020-08-06
- Granted: 2022-04-12
- Earliest claimed: 2017-09-26
- Assignees: Advics Co., Ltd.
- Applicants: Advics Co., Ltd.
- Inventors: Takayuki Yamamoto; Hiroyuki Kodama; Hiroyuki Ando
- Web page: https://patentgrep.com/patent/US11299135B2

## CPC

- B60T 1/10: by utilising wheel movement for accumulating energy, e.g. driving air compressors
- B60T 13/68: by electrically-controlled valves {(B60T13/662 and B60T13/665 take precedence)}
- B60T 7/042: {by electrical means, e.g. using travel or force sensors}
- B60T 8/1766: Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
- B60T 8/409: {characterised by details of the stroke simulating device}
- B60T 13/20: with control of pump driving means
- B60T 13/586: {the retarders being of the electric type}
- B60T 13/662: {characterised by specified functions of the control system components}
- B60T 13/686: {in hydraulic systems or parts thereof}
- F16D 61/00: Brakes with means for making the energy absorbed available for use (F16D57/00 takes precedence)
- B60T 2270/604: Merging friction therewith; Adjusting their repartition
- B60T 2270/608: Electronic brake distribution (EBV/EBD) features related thereto
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A brake control device including a pressure adjusting unit including an electric pump and an electromagnetic valve, and that adjusts, using the electromagnetic valve, a brake liquid discharged by the electric pump to an adjusted liquid pressure and introduces the adjusted liquid pressure to the wheel cylinders of the rear wheels; and a master unit that includes a master cylinder and a master piston, and that includes a master chamber connected to the wheel cylinders of the front wheels and a servo chamber to which the adjusted liquid pressure is introduced and which provides, to the master piston, an advancing force that opposes a retreating force applied to the master piston by the master chamber.

## Claims

### Claim 1

A vehicle brake control device that adjusts a front wheel liquid pressure in a front wheel cylinder provided on a front wheel of a vehicle, and a rear wheel liquid pressure in a rear wheel cylinder provided on a rear wheel of the vehicle depending on an operation of a brake operation member of the vehicle, the vehicle brake control device comprising:
a pressure adjusting unit that includes an electric pump and an electromagnetic valve, and that adjusts a brake liquid discharged by the electric pump to an adjusted liquid pressure using the electromagnetic valve, and introduces the adjusted liquid pressure to the rear wheel cylinder; and
a master unit that includes a master cylinder and a master piston, and that includes a master chamber connected to the front wheel cylinder, and a servo chamber to which the adjusted liquid pressure is introduced and that applies, to the master piston, an advancing force that opposes a retreating force applied to the master piston by the master chamber,
wherein the electromagnetic valve is a normally-open type valve, and
wherein the electromagnetic valve adjusts the brake liquid discharged by the electric pump to the adjusted liquid pressure by narrowing a reflux flow of the brake liquid.

### Claim 2 (depends on 1)

The vehicle brake control device according to claim 1, further comprising
a regenerative cooperation unit including an input piston that operates in cooperation with the brake operation member, and an input cylinder fixed to the master cylinder, wherein
a gap between the master piston and the input piston is controlled by the adjusted liquid pressure.

### Claim 3 (depends on 1)

The vehicle brake control device according to claim 1, wherein the adjusted liquid pressure introduced to the rear wheel cylinder is directly controlled by the pressure adjusting unit without passing through the master cylinder.