# US 10,766,466 B2 · Method for operating an automated hand brake

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- Number: US 10,766,466 B2
- Document ID: US10766466B2
- Status: Granted
- Kind: B2
- Application number: 15/725,315
- Filed: 2017-10-05
- Published: 2018-04-05
- Granted: 2020-09-08
- Earliest claimed: 2016-10-05
- Assignees: Robert Bosch GmbH
- Applicants: Robert Bosch GmbH
- Inventors: Andreas Englert; Edith Mannherz; Frank Baehrle-Miller; Tobias Putzer
- Web page: https://patentgrep.com/patent/US10766466B2

## CPC

- B60T 7/12: for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)}
- B60T 7/08: hand actuated
- B60T 13/741: {acting on an ultimate actuator}
- 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

Method for operating an automated hand brake comprising at least one first actuator and one second actuator for a motor vehicle, wherein each of the actuators is activated for an operation using a defined amperage, is characterized in that, in a first phase, the actuators are operated essentially synchronously until a defined first amperage is reached and, in a subsequent phase, the actuators are sequentially operated until a defined second amperage is reached.

## Claims

### Claim 1

A method for operating an automated hand brake having at least one first actuator and at least one second actuator for a motor vehicle, the method comprising:
activating each of the at least one first actuator and the at least one second actuator using a defined amperage during a braking process;
in a first phase of the braking process, operating the at least one first actuator and the at least one second actuator essentially synchronously until a defined first amperage is reached; and
in a subsequent phase of the braking process after the first phase, operating the at least one first actuator and the at least one second actuator sequentially until a defined second amperage is reached.

### Claim 2 (depends on 1)

The method according to claim 1 further comprising:
in a second phase, deactivating the least one first actuator and activating the at least one second actuator until the defined second amperage is reached; and
in a third phase, activating the at least one first actuator and deactivating the at least one second actuator until the defined second amperage is reached.

### Claim 3 (depends on 1)

The method according to claim 1 further comprising at least one of:
operating, without interruption, the at least one second actuator until the defined second amperage is reached; and
operating, without interruption, the at least one first actuator until the defined second amperage is reached.

### Claim 4 (depends on 1)

The method according to claim 1 further comprising:
activating the at least one first actuator and the at least one second actuator upon a start of a locking process;
in a first step, operating the at least one first actuator and the at least one second actuator synchronously and deactivating the at least one first actuator in response to the defined first amperage being reached by the at least one first actuator;
in a second step, operating only the at least one second actuator and deactivating the at least one second actuator in response to the defined second amperage being reached by the at least one second actuator; and
in a third step, reactivating and operating the at least one first actuator and deactivating the at least one first actuator in response to the defined second amperage being reached by the at least one first actuator.

### Claim 5 (depends on 1)

The method according to claim 1 further comprising:
in a second phase, deactivating the at least one first actuator and activating the at least one second actuator until the defined first amperage is reached;
in a third phase, deactivating the at least one first actuator and the at least one second actuator;
in a fourth phase, activating the at least one first actuator and deactivating the at least one second actuator; and
in a fifth phase, deactivating the at least one first actuator and activating the at least one second actuator.

### Claim 6 (depends on 1)

The method according to claim 1 further comprising:
activating the at least one first actuator and the at least one second actuator upon a start of the locking process, and
in a first step, operating the at least one first actuator and the at least one second actuator synchronously and deactivating the at least one first actuator in response to the defined first amperage being reached by the at least one first actuator;
in a second step, operating only the at least one second actuator and deactivating the at least one second actuator in response to the defined first amperage being reached by the at least one second actuator;
in a third step, ceasing operating the at least one first actuator and the at least one second actuator and activating the at least one first actuator in response to a defined condition being met;
in a fourth step, operating only the at least one first actuator and deactivating the at least one first actuator in response to the defined second amperage being reached by the at least one first actuator; and
in a fifth step, reactivating and operating the at least one second actuator and deactivating the at least one second actuator in response to the defined second amperage being reached by the at least one second actuator.

### Claim 7 (depends on 1)

The method according to claim 1 further comprising:
wherein the defined first amperage is a summation amperage of the at least one first actuator and the at least one second actuator.

### Claim 8 (depends on 1)

The method according to claim 1 further comprising:
deriving at least one of the defined first amperage and the defined second amperage based on one of a required clamping force and a desired clamping force of the hand brake.

### Claim 9 (depends on 8)

The method according to claim 8 further comprising:
deriving the at least one of the defined first amperage and the defined second amperage further based on at least one of an applied voltage, a temperature, and a defined motor parameter.

### Claim 10

A device for operating an automated hand brake having at least one first actuator and at least one second actuator for a motor vehicle, the device being configured to:
activate each of the at least one first actuator and the at least one second actuator using a defined amperage during a braking process;
in a first phase of the braking process, operate the at least one first actuator and the at least one second actuator essentially synchronously until a defined first amperage is reached; and
in a subsequent phase of the braking process after the first phase, operate the at least one first actuator and the at least one second actuator sequentially operated until a defined second amperage is reached.

### Claim 11

A non-transitory machine-readable storage medium having stored thereon a computer program for execution by a control unit of a stability system for operating an automated hand brake having at least one first actuator and at least one second actuator for a motor vehicle, the computer program being configured cause the control unit to:
activate each of the at least one first actuator and the at least one second actuator using a defined amperage during a braking process;
in a first phase of the braking process, operate the at least one first actuator and the at least one second actuator essentially synchronously until a defined first amperage is reached; and
in a subsequent phase of the braking process after the first phase, operate the at least one first actuator and the at least one second actuator sequentially operated until a defined second amperage is reached.