Apparatus and method for controlling electro-mechanical brake system, and its system
AssigneeHl Mando Corporation
InventorKyoungjin Joo
Life of this patent
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Abstract
The present disclosure relates to a control apparatus and method of an electro-mechanical brake system and its system. A device according to an embodiment of the present disclosure is a device for controlling an electro-mechanical brake system of a vehicle, and may include a memory; and a processor configured to control an operation of the system by controlling a motor operating based on power of a battery to provide a braking force to the vehicle using information stored in the memory, wherein the processor is configured to control a current applied to the motor to be adjusted based on a maximum allowable current, IL of the battery limited according to a voltage information, VB of the battery.
Claims14
An apparatus for controlling an electro-mechanical brake system of a vehicle, the apparatus comprising:
- a memory;
- and
- a processor configured to control an operation of the system by controlling a motor operating based on power of a battery to provide a braking force to the vehicle using information stored in the memory,
- wherein the processor is configured to
- determine a maximum allowable current IL based on a battery voltage VB,
- determine a battery current IB*,
- determine a compensation current command ΔIref based on difference between the maximum allowable current IL and the battery current IB*, and
- control a current applied to the motor based on an adjusted current command Iref*-which is obtained by adjusting Iref by ΔIref,
- wherein the compensation current command ΔIref is determined by:
- determining a current difference ΔI between the maximum allowable current IL and the battery current IB*,
- determining a residual power ΔP by multiplying the current difference ΔI by battery voltage VB, and
- dividing the residual power ΔP by a result of multiplication of a rotational speed SM of the motor and a motor torque constant KL.
A electro-mechanical brake system of a vehicle, the system comprising:
- a master cylinder being connected to a brake pedal;
- a hydraulic pressure supply device comprising a motor generating a rotational force and a hydraulic pressure piston movably accommodated in a pressure chamber, and generating hydraulic pressure by movement of the hydraulic pressure piston;
- a hydraulic pressure control unit controlling a flow of the hydraulic pressure transmitted from the hydraulic pressure supply device to a wheel cylinder;
- a hydraulic pressure block having the master cylinder, the hydraulic pressure supply device, and the hydraulic pressure control unit integrated therein;
- and
- a controller for controlling the motor and the hydraulic pressure control unit, and controlling the motor operating based on power of a battery to provide a braking force to the vehicle,
- wherein the controller is configured to
- determine a maximum allowable current IL based on a battery voltage VB,
- determine a battery current IB*,
- determine a compensation current command ΔIref based on difference between the maximum allowable current IL and the battery current IB*,
- control a current applied to the motor based on an adjusted current command Iref* which is obtained by adjusting Iref by ΔIref,
- wherein the compensation current command ΔIref is determined by:
- determining a current difference ΔI between the maximum allowable current IL and the battery current IB*,
- determining a residual power ΔP by multiplying the current difference ΔI by battery voltage VB, and
- dividing the residual power ΔP by a result of multiplication of a rotational speed SM of the motor and a motor torque constant KL.
A control method performed in an electro-mechanical brake system of a vehicle and controlling a motor operating based on power of battery to provide a braking force to the vehicle, the method comprising:
- determining whether VB, which is voltage information of the battery, corresponds to an adjustment required section;
- determining a maximum allowable current IL based on a battery voltage VB;
- determining a battery current IB*;
- determining a compensation current command ΔIref based on difference between the maximum allowable current IL and the battery current IB*;
- and
- controlling a current applied to the motor based on an adjusted current command Iref*-which is obtained by adjusting Iref by ΔIref,
- wherein the compensation current command ΔIref is determined by:
- determining a current difference ΔI between the maximum allowable current IL and the battery current IB*;
- determining a residual power ΔP by multiplying the current difference ΔI by battery voltage VB;
- and
- dividing the residual power ΔP by a result of multiplication of a rotational speed SM of the motor and a motor torque constant KL.
Dependencies are inferred from the claim text.