US 12,257,991 B2Granted

Automated braking control systems

AssigneeRobert Bosch GmbH

InventorsRyan A. Kuhlman, Erica Hingst, Guillaume Hastoy, Samuel Steele

Life of this patent

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Abstract

Systems and methods for controlling a vehicle. One example system includes a deceleration actuator coupled to a first wheel of the vehicle and an electronic processor communicatively coupled to the deceleration actuator. The electronic processor is configured to receive a vehicle park command. The electronic processor is configured to, responsive to receiving the vehicle park command, determine a maximum holding pressure threshold. The electronic processor is configured to determine a requested braking pressure for the deceleration actuator. The electronic processor is configured to determine whether the requested braking pressure exceeds the maximum holding pressure threshold. The electronic processor is configured to, responsive to determining that the requested braking pressure does not exceed the maximum holding pressure threshold, control the deceleration actuator to apply, to the first wheel during a hold time, a holding braking pressure equivalent to the requested braking pressure.

Claims21

Dependent claims

A system for controlling a vehicle, the system comprising:

a deceleration actuator coupled to a first wheel of the vehicle;
and
one or more electronic processors communicatively coupled to the deceleration actuator and configured to:
receive a vehicle park command;
responsive to receiving the vehicle park command, determine a maximum holding pressure threshold;
determine a requested braking pressure for the deceleration actuator;
determine whether the requested braking pressure exceeds the maximum holding pressure threshold;
responsive to determining that the requested braking pressure does not exceed the maximum holding pressure threshold, control the deceleration actuator to apply, to the first wheel during a hold time, a holding braking pressure equivalent to the requested braking pressure;
and
responsive to determining that the requested braking pressure exceeds the maximum holding pressure threshold and prior to controlling the deceleration actuator to apply the holding braking pressure, perform a transition-to-hold test by
controlling the deceleration actuator to apply a hold test braking pressure equivalent to the maximum holding pressure threshold;
and
detecting whether the vehicle is in a roll state.

10 more elements

A method for controlling a vehicle, the method comprising:

receiving, with an electronic processor, a vehicle park command;
responsive to receiving the vehicle park command, determining, with the electronic processor, a maximum holding pressure threshold;
determining a requested braking pressure for a deceleration actuator coupled to a first wheel of the vehicle;
determining whether the requested braking pressure exceeds the maximum holding pressure threshold;
responsive to determining that the requested braking pressure does not exceed the maximum holding pressure threshold, controlling the deceleration actuator to apply, to the first wheel during a hold time, a holding braking pressure equivalent to the requested braking pressure;
and
responsive to determining that the requested braking pressure exceeds the maximum holding pressure threshold and prior to controlling the deceleration actuator to apply the holding braking pressure, performing a transition-to-hold test by:
controlling the deceleration actuator to apply a hold test braking pressure equivalent to the maximum holding pressure threshold;
and
detecting whether the vehicle is in a roll state.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/516,351Filed 1 Nov 2021
Published: US 2023/0134211 A14 May 2023
Granted: 25 Mar 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B60T 7/12
Brake-action initiating means: for automatic initiation; for initiation not subject to will of driver or passenger
B60T 7/122
For automatic initiation; for initiation not subject to will of driver or passenger: for locking of reverse movement
B60T 7/14
For automatic initiation; for initiation not subject to will of driver or passenger: operated upon collapse of driver
B60T 8/92
With failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means: automatically…