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CN-122009122-A - Automatic brake hold for electromechanical braking

CN122009122ACN 122009122 ACN122009122 ACN 122009122ACN-122009122-A

Abstract

A vehicle may include an electromechanical brake system including an electric motor mechanically coupled to a brake pad assembly to perform a service brake operation and a parking brake operation, and a controller configured to control the electromechanical brake system to perform the parking brake operation such that the parking brake operation automatically maintains braking without actuation of the electric motor of the electromechanical brake system when the electric motor of the electromechanical brake system has performed the service brake operation for more than a preset time at a stop of the vehicle.

Inventors

  • Shen jingxun

Assignees

  • 汉拿万都株式会社

Dates

Publication Date
20260512
Application Date
20250516
Priority Date
20241112

Claims (10)

  1. 1. A vehicle, comprising: An electromechanical braking system including an electric motor mechanically coupled to a brake pad assembly to perform service braking operations and parking braking operations, and And a controller configured to control the electromechanical brake system to perform the parking brake operation such that the parking brake operation automatically maintains braking without actuation of the electromechanical brake system's motor when the electromechanical brake system's motor has performed the service brake operation for more than a preset time while the vehicle is stopped.
  2. 2. The vehicle of claim 1, wherein the controller is configured to control the electromechanical brake system to change operation of the electromechanical brake system from the service brake operation to the parking brake operation when the electric motor of the electromechanical brake system has performed the service brake operation for more than the preset time while the vehicle is stopped.
  3. 3. The vehicle of claim 1, wherein the controller is configured to control the electromechanical brake system to deactivate a parking brake operation of the electromechanical brake system in response to a command to release an automatic holding brake such that the electromechanical brake system is capable of performing the service brake operation.
  4. 4. The vehicle of claim 1, wherein the electromechanical braking system includes a parking lock mechanism configured to selectively lock components of the electromechanical braking system such that, absent actuation of an electric motor of the electromechanical braking system, the brake pad assembly mechanically connected to components of the electromechanical braking system maintains a brake clamping force on a rotor associated with a wheel, and The controller is configured to control the electromechanical brake system to automatically maintain braking by locking a component of the electromechanical brake system by a parking lock mechanism of the electromechanical brake system when an electric motor of the electromechanical brake system has performed the service brake operation for more than the preset time while the vehicle is stopped.
  5. 5. The vehicle according to claim 4, wherein the controller is configured to control the parking lock mechanism of the electromechanical brake system or the motor to release a locked state of a component of the electromechanical brake system in response to a command to release an automatic holding brake so that the electromechanical brake system can perform the service brake operation.
  6. 6. The vehicle according to claim 4, wherein the parking lock mechanism includes a movable pillar, and the component of the electromechanical brake system has a notch, and The parking lock mechanism is configured to selectively lock a component of the electromechanical brake system by engaging a movable leg of the parking lock mechanism with one notch of the component.
  7. 7. The vehicle of claim 1, wherein the electromechanical braking system includes a parking lock mechanism configured to selectively lock components of the electromechanical braking system such that the brake pad assembly mechanically connected to components of the electromechanical braking system is not movable to automatically maintain braking without actuation of a motor of the electromechanical braking system, and The controller is configured to generate a clamping force of the brake pad assembly caused by actuation of the motor, lock a component of the electromechanical brake system by the parking lock mechanism, and stop actuating the motor after the component of the electromechanical brake system is locked by the parking lock mechanism so that braking is automatically maintained.
  8. 8. The vehicle according to claim 7, wherein the controller is configured to control the parking lock mechanism or the motor to release a locked state of a component of the electromechanical brake system in response to a command to release an automatic holding brake so that the electromechanical brake system can perform the service brake operation.
  9. 9. A computerized method comprising: Monitoring whether an electric motor of an electric brake system has performed a service brake operation for more than a preset time at a vehicle stop opportunity, wherein the electric brake system includes an electric motor mechanically coupled to a brake pad assembly to perform the service brake operation and a parking brake operation, and When the electric motor of the electromechanical brake system has performed the service brake operation for more than a preset time while the vehicle is stopped, the electromechanical brake system is controlled to perform the parking brake operation such that the parking brake operation automatically maintains braking without actuation of the electric motor of the electromechanical brake system.
  10. 10. The computerized method of claim 9, wherein controlling the electromechanical brake system to perform the parking brake operation comprises controlling the electromechanical brake system to change operation of the electromechanical brake system from the service brake operation to the parking brake operation when an electric motor of the electromechanical brake system has performed the service brake operation for more than the preset time while the vehicle is stopped.

Description

Automatic brake hold for electromechanical braking Technical Field Various embodiments of the present disclosure relate generally to an electro-mechanical brake (EMB) system, and more particularly, to automatic brake hold, wherein the application of a brake may be automatically held without actuation of an actuator of the electro-mechanical brake system using a park brake operation of the electro-mechanical brake system. Background The braking system of a motor vehicle, in particular a motor vehicle, functionally reduces the speed of the vehicle or keeps the vehicle in a stationary position. Various types of braking systems are commonly used in automobiles, including hydraulic braking systems, anti-lock braking systems or ABS, and electric or brake-by-wire systems. For example, in hydraulic braking systems, hydraulic fluid transfers energy from a brake pedal to a brake pad (pad) to slow or stop rotation of a wheel. In electric brake systems, the application and release of the brake is controlled by an electric caliper via an electrical signal. Electric brake systems typically include an electric actuator that is connected to the brake caliper by a cable, such as a drum head (drumhead), or that is directly attached to the brake caliper. The electric actuator converts electrical energy into rotational mechanical output power to move a cable or drive a lead screw and apply a brake. In general, a brake system may include a service brake assembly (service brake assembly) and a parking brake assembly. The parking brake assembly may be used to prevent movement of the vehicle when the vehicle is stopped or parked. The park brake assembly may be a stand alone assembly. Alternatively, the service brake assembly and the parking brake assembly may be integrated into a single brake system. The park brake assembly may utilize one or more components of the service brake assembly. That is, the parking brake assembly may utilize the piston and brake pad of the service brake assembly to produce the brake application. For example, the parking brake assembly may move a piston that may move a brake pad into contact with the rotor to generate and maintain a brake application by a clamping force applied to the rotor. Disclosure of Invention The features and advantages of the present disclosure will be more readily understood and apparent from the following detailed description, which is to be read in connection with the accompanying drawings, and the appended claims. According to some example embodiments of the present disclosure, a vehicle may include an electromechanical brake system including an electric motor mechanically coupled to a brake pad assembly to perform a service brake operation and a parking brake operation, and a controller configured to control the electromechanical brake system to perform the parking brake operation such that the parking brake operation automatically maintains braking without actuation of the electric motor of the electromechanical brake system when the electric motor of the electromechanical brake system has performed the service brake operation for more than a preset time at a time when the vehicle is stopped. The controller may be configured to control the electromechanical brake system to change an operation of the electromechanical brake system from a service brake operation to a parking brake operation when the electric motor of the electromechanical brake system has performed a service brake operation for more than a preset time at a time of stopping the vehicle. The controller may be configured to control the electromechanical brake system to deactivate a parking brake operation of the electromechanical brake system in response to a command to release the automatic holding brake so that the electromechanical brake system is able to perform a service brake operation. The electromechanical brake system may include a parking lock mechanism configured to selectively lock a component of the electromechanical brake system such that a brake pad assembly mechanically connected to the component of the electromechanical brake system maintains a brake clamping force to a rotor associated with a wheel without actuation of an electric motor of the electromechanical brake system, and the controller may be configured to control the electromechanical brake system to automatically maintain braking by locking the component of the electromechanical brake system by the parking lock mechanism of the electromechanical brake system when the electric motor of the electromechanical brake system has performed a service brake operation for more than a preset time at a time when the vehicle is stopped. The controller may be configured to control the parking lock mechanism or the motor of the electromechanical brake system to release the locked state of the component of the electromechanical brake system in response to a command to release the automatic holding brake so that the motor of the electromechanical brake