DE-102025118868-A1 - AUTOMATIC BRAKE HOLDING FUNCTION FOR AN ELECTROMEMIC BRAKE

DE102025118868A1DE 102025118868 A1DE102025118868 A1DE 102025118868A1DE-102025118868-A1

Abstract

A vehicle may include: an electromechanical braking system comprising an electric motor mechanically connected to a brake block assembly for performing a service braking operation and a parking brake operation; and a controller configured to, if the service braking operation has been performed by the electric motor of the electromechanical braking system for more than a preset time while the vehicle is stopped, control the electromechanical braking system to perform the parking brake operation, so that a brake is automatically held by the parking brake operation without activation of the electric motor of the electromechanical braking system.

Inventors

Gyunghun SIM

Assignees

HL MANDO CORPORATION

Dates

Publication Date: 20260513
Application Date: 20250515
Priority Date: 20241112

Claims (15)

Vehicle comprising: an electromechanical braking system comprising an electric motor mechanically connected to a brake pad assembly for performing a service braking operation and a parking brake operation; and a controller configured to control the electromechanical braking system to perform the parking brake operation if the service braking operation has been performed by the electric motor of the electromechanical braking system for more than a preset time while the vehicle is stopped, so that a brake is automatically held by the parking brake operation without actuation of the electric motor of the electromechanical braking system.
Vehicle after Claim 1 , wherein the controller is configured to control the electromechanical braking system to change the operation of the electromechanical braking system from the service braking operation to the parking brake operation if the service braking operation has been performed by the electric motor of the electromechanical braking system for more than the preset time while the vehicle is stopped.
Vehicle after Claim 1 or 2 , wherein the controller is configured to control the electromechanical braking system in response to a command to release the automatically held brake, in order to disable the parking brake operation of the electromechanical braking system, so that the electric motor of the electromechanical braking system is able to perform the service braking operation.
vehicle after one or more of the Claims 1 until 3 , wherein: the electromechanical braking system comprises a locking interlock mechanism configured to selectively lock a component of the electromechanical braking system such that the brake pad assembly mechanically connected to the component of the electromechanical braking system maintains a brake clamping force against a rotor associated with a vehicle wheel without actuation of the electric motor of the electromechanical braking system, and the controller is configured to control the electromechanical braking system to automatically hold the brake by locking the component of the electromechanical braking system through the locking interlock mechanism of the electromechanical braking system, if the service braking operation has been performed by the electric motor of the electromechanical braking system for more than the preset time while the vehicle is stopped.
Vehicle after Claim 4 , wherein the controller is configured to control, in response to a command to release the automatically held brake, the locking mechanism or the electric motor of the electromechanical braking system to release a locked state of the component of the electromechanical braking system so that the electric motor of the electromechanical braking system is able to perform the service braking operation.
Vehicle after Claim 4 or 5 , wherein: the locking mechanism comprises a movable strut and the electromechanical braking system component has notches, and the locking mechanism is configured to selectively lock the electromechanical braking system component by engaging the movable strut of the locking mechanism with one of the notches of the electromechanical braking system component.
vehicle after one or more of the Claims 1 until 6 , wherein: the electromechanical braking system comprises a locking interlock mechanism configured to selectively lock a component of the electromechanical braking system such that the brake pad assembly mechanically connected to the component of the electromechanical braking system is immobile to automatically hold the brake without actuation of the electric motor of the electromechanical braking system, and the controller is configured to generate a clamping force of the brake pad assembly caused by the activation of the electric motor to lock the component of the electromechanical braking system by the locking interlock mechanism, and to deactivate the electric motor after the component of the electromechanical braking system is locked by the locking interlock mechanism, so that the brake is automatically held.
Vehicle after Claim 7 , wherein the controller is configured to control the locking mechanism or the electric motor in response to a command to release the automatically held brake, in order to release a locked state of the component of the electromechanical braking system, so that the electric motor of the electromechanical braking system in is able to perform the service braking process.
A computer-aided method comprising: monitoring whether a service braking operation has been performed by an electric motor of an electromechanical braking system for more than a preset time while a vehicle is stopped, the electromechanical braking system comprising the electric motor mechanically connected to a brake block assembly for performing the service braking operation and a parking brake operation; and if the service braking operation has been performed by the electric motor of the electromechanical braking system for more than a preset time while the vehicle is stopped, controlling the electromechanical braking system to perform the parking brake operation, so that a brake is automatically held by the parking brake operation without actuation of the electric motor of the electromechanical braking system.
Computer-aided procedure according to Claim 9 , wherein controlling the electromechanical braking system to perform the parking brake operation includes, when the service brake operation has been performed by the electric motor of the electromechanical braking system for more than the preset time while the vehicle is stopped, controlling the electromechanical braking system to change an operation of the electromechanical braking system from the service brake operation to the parking brake operation.
Computer-aided procedure according to Claim 9 or 10 , furthermore, in response to a command to release the automatically held brake, controlling the electromechanical braking system to deactivate the parking brake operation of the electromechanical braking system so that the electric motor of the electromechanical braking system is able to perform the service braking operation.
Computer-aided procedure one or more of the Claims 9 until 11 , wherein controlling the electromechanical braking system to perform the parking brake operation includes, when the service brake operation has been performed by the electric motor of the electromechanical braking system for more than the preset time while the vehicle is stopped, controlling the electromechanical braking system to automatically hold the brake by locking a component of the electromechanical braking system by means of a parking lock mechanism configured to selectively lock the component of the electromechanical braking system, such that the brake pad assembly mechanically connected to the component of the electromechanical braking system maintains a brake clamping force against a rotor associated with a vehicle wheel without activating the electric motor of the electromechanical braking system.
Computer-aided procedure according to Claim 12 , furthermore, in response to a command to release the automatically held brake, controlling the locking mechanism or the electric motor of the electromechanical braking system to release a locked state of the component of the electromechanical braking system so that the electric motor of the electromechanical braking system is able to perform the service braking operation.
Computer-aided procedure according to Claim 12 or 13 , wherein: the locking mechanism comprises a movable strut and the electromechanical braking system component has notches, and the locking mechanism is configured to selectively lock the electromechanical braking system component by engaging the movable strut of the locking mechanism with one of the notches of the electromechanical braking system component.
Computer-aided procedure one or more of the Claims 9 until 14 , wherein: the electromechanical braking system comprises a locking interlock mechanism configured to selectively lock a component of the electromechanical braking system such that the brake pad assembly mechanically connected to the component of the electromechanical braking system is immobile to automatically hold the brake without activation of the electric motor of the electromechanical braking system, and further comprising generating a clamping force of the brake pad assembly caused by activation of the electric motor, locking the component of the electromechanical braking system by the locking interlock mechanism, and disabling the electric motor after the component of the electromechanical braking system is locked by the locking interlock mechanism, so that the brake is automatically held.

Description

BACKGROUND OF THE INVENTION Various embodiments of the present disclosure generally relate to an electromechanical braking system (EMB system) and in particular to an automatic brake holding function (auto-hold function), wherein the actuation of a brake can be held automatically without activating an actuator of an electromechanical braking system by using a parking brake operation of the electromechanical braking system. A braking system for a motor vehicle, and especially a car, functionally reduces the vehicle's speed or holds the vehicle in a stationary position. Various types of braking systems are commonly used in motor vehicles, including hydraulic, anti-lock braking (ABS), and electric (brake-by-wire) systems. For example, in a hydraulic braking system, hydraulic fluid transfers energy from a brake pedal to a brake pad to slow down or stop the rotation of a wheel of the vehicle. In an electric braking system, the application and release of the brake is controlled by an electric caliper via an electrical signal. The electric braking system typically includes an electric actuator, which is connected to a brake caliper either by a cable, like the drum in the head, or is attached directly to the caliper. The electric actuator converts electrical power into mechanical rotational output power to move the cable or drive screw and apply the brake. In general, the braking system can include a service brake assembly (driving brake assembly) and a parking brake assembly. The parking brake assembly can be used to prevent the vehicle from moving when it is stopped or parked. The parking brake assembly can be a separate assembly. Alternatively, the service brake assembly and the parking brake assembly can be integrated into a single braking system. The parking brake assembly can use one or more components of the service brake assembly. That is, the parking brake assembly can use the piston and brake shoes of the service brake assembly to generate brake actuation. For example, the parking brake assembly can move the piston, which in turn moves the brake shoes into contact with the rotor to generate and maintain brake actuation by exerting a clamping force on the rotor. SUMMARY The features and advantages of the present disclosure will be more easily understood and become apparent from the following detailed description, which should be read in conjunction with the accompanying drawings, and from the claims appended at the end of the detailed description. According to some exemplary embodiments of the present disclosure, a vehicle may comprise: an electromechanical braking system comprising an electric motor mechanically connected to a brake block assembly for performing a service braking operation and a parking brake operation; and a controller configured to, when the service braking operation has been performed by the electric motor of the electromechanical braking system for more than a preset time while the vehicle is stopped, control the electromechanical braking system to perform the parking brake operation, so that a brake is automatically held by the parking brake operation without actuation of the electric motor of the electromechanical braking system. The controller can be configured to control the electromechanical braking system to change its operation from the service braking operation to the parking brake operation if the service braking operation has been performed by the electric motor of the electromechanical braking system for more than the preset time while the vehicle is stopped. The controller can be configured to control the electromechanical braking system in response to a command to release the automatically held brake, in order to disable the parking brake operation of the electromechanical braking system, so that the electric motor of the electromechanical braking system is able to perform the service braking operation. The electromechanical braking system may include a locking mechanism configured to selectively lock a component of the electromechanical braking system, so that the brake pad assembly mechanically connected to the component of the electromechanical braking system exerts a braking clamping force against a rotor associated with a vehicle wheel without actuation of the electric motor of the electromechanical braking system. The controller maintains the system, and the controller can be configured to automatically hold the brake by locking the component of the electromechanical braking system through the locking mechanism of the electromechanical braking system if the service braking operation has been carried out by the electric motor of the electromechanical braking system for more than the preset time while the vehicle is stopped. The controller can be configured to control the locking mechanism or the electric motor of the electromechanical braking system in response to a command to release the automatically held brake, in order to release a locked state of the component o