# US 2021/0276518 A1 · Method for operating a brake system, and brake system

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- Number: US 2021/0276518 A1
- Document ID: US20210276518A1
- Status: Published application
- Kind: A1
- Application number: 17/259,878
- Filed: 2019-06-22
- Published: 2021-09-09
- Earliest claimed: 2018-08-13
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: Achim Eisele; Andreas Klug; Andreas Zoebele; Jan Becker; Matthias Kranich; Philipp Weingart; Ruediger Poggenburg
- Web page: https://patentgrep.com/patent/US20210276518A1

## CPC

- B60T 8/17616: {Microprocessor-based systems}
- B60T 8/1766: Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
- B60T 8/172: Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters {(B60T8/17551 takes precedence)}
- B60T 8/321: {deceleration (B60T8/34, B60T8/52, B60T8/54, B60T8/56, B60T8/58, B60T8/72, B60T8/86, B60T8/88 take precedence)}
- B60T 2201/12: Pre-actuation of braking systems without significant braking effect; Optimizing brake performance by reduction of play between brake pads and brake disc
- B60T 2230/04: Jerk, soft-stop; Anti-jerk, reduction of pitch or nose-dive when braking
- B60T 2240/00: Monitoring, detecting wheel/tyre behaviour; counteracting thereof
- B60T 2250/00: Monitoring, detecting, estimating vehicle conditions
- B60T 2270/10: ABS control systems
- 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

## Abstract

A method for operating a brake system of a vehicle. A precontrol value for a brake pressure of the brake system is set by using an admission pressure value representing a admission pressure in the brake system and a processing specification representing a braking dynamics of the vehicle.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A method for operating a brake system of a vehicle, comprising:
setting a precontrol value for a brake pressure of the brake system using a admission pressure value representing an admission pressure in the brake system and a processing specification representing a braking dynamics of the vehicle.

### Claim 14 (depends on 13)

The method as recited in claim 13, wherein the precontrol value is set per axle of the vehicle.

### Claim 15 (depends on 13)

The method as recited in claim 13, wherein the processing specification represents a vehicle model-specific normal force curve over time during a braking operation of the vehicle.

### Claim 16 (depends on 13)

The method as recited in claim 13, wherein the processing specification represents a vehicle model-specific pitching dynamics during a braking operation of the vehicle.

### Claim 17 (depends on 13)

The method as recited in claim 13, wherein a precontrol gradient of the precontrol value is set by using an admission pressure gradient of the admission pressure value and the processing specification.

### Claim 18 (depends on 17)

The method as recited in claim 17, wherein the precontrol gradient is limited when the admission pressure gradient is greater than a limit gradient.

### Claim 19 (depends on 13)

The method as recited in claim 13, wherein a setpoint value of the brake pressure is individually controlled by using the precontrol value and a derivative of a wheel speed of a wheel braked by a wheel brake cylinder.

### Claim 20 (depends on 19)

The method as recited in claim 19, wherein the setpoint value is set during an initial brake application time in accordance with the precontrol value and is controlled following an expiration of the initial brake application time by using the precontrol value and the derivative of the wheel speed.

### Claim 21 (depends on 19)

The method as recited in claim 19, wherein the setpoint value is controlled in such a way that the wheel speed is reduced within a slip corridor.

### Claim 22

A brake system, configured to:
set a precontrol value for a brake pressure of the brake system using a admission pressure value representing an admission pressure in the brake system and a processing specification representing a braking dynamics of the vehicle.

### Claim 23

A non-transitory machine-readable storage medium on which is stored a computer program for operating a brake system of a vehicle, the computer program, when executed by a computer, causing the computer to perform or control:
setting a precontrol value for a brake pressure of the brake system using a admission pressure value representing an admission pressure in the brake system and a processing specification representing a braking dynamics of the vehicle.