Electromechanical Brake Initialization via Solenoid Valve and ECU
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Solution Overview
Problem
Electromechanical brake systems using gears generate noise and occupy space, and may malfunction during electrical system failures, making emergency braking impossible.
Innovation Solution
An apparatus and method that initializes the electromechanical brake by distinguishing between parking and main brake states using a solenoid valve and electronic control unit to depressurize or pressurize pistons, matching the positions of master and slave pistons, and utilizing both oil pressure and motor power to control braking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an electromechanical brake system uses a gear to convert rotary power to forward and backward motion of the piston, then the rotary power of the motor is increased, but noise is generated and the mechanism occupies a large space
Solution Approach 1:
The patent removes the gear mechanism from the electromechanical brake system, extracting the noise-generating component while maintaining the core function of converting rotary motor power to linear piston motion through alternative means
Solution Approach 2:
The patent replaces the mechanical gear transmission system with a direct-drive or alternative mechanism that eliminates gear-related noise while achieving the same power conversion function from rotary to linear motion
2Device complexity
If an electromechanical brake system generates braking force only through the motor, then the system is simplified, but the brake may not be normally operated in case where the electrical system malfunctions
Solution Approach 1:
The patent merges two braking mechanisms - an electromechanical brake using motor power and a hydraulic brake using oil pressure - into a single integrated system that can operate through either mechanism depending on electrical system status
Solution Approach 2:
The patent incorporates a hydraulic backup system that can take over braking functions beforehand in case the electrical system fails, providing pre-established redundancy to ensure continuous brake operation
3Device complexity
If the brake system does not distinguish between parking brake state and main brake state during initialization, then the control process is simplified, but the master and slave pistons cannot be properly aligned
Solution Approach 1:
The patent implements preliminary detection of brake state (parking vs. main brake) before initialization, allowing the system to prepare appropriate control parameters and sequences to ensure proper piston alignment from the start
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents brake system malfunctions by ensuring proper piston alignment and maintaining braking force functionality, regardless of electrical system status, reducing noise and space occupancy by eliminating the need for gears.
Implementation Method 1
a solenoid valve for transmitting oil pressure generated through a manipulation force for a brake pedal
Implementation Method 2
a slave piston which is pressurized by oil pressure generated through a pressurizing force of the master piston
Data Source
AI summary
An apparatus for initializing an electromechanical brake (EMB) may include: a solenoid valve for transmitting oil pressure generated through a manipulation force for a brake pedal; a piston unit for pressurizing a brake disk through at least one of the oil pressure transmitted through the solenoid valve and power generated by a motor; and an electronic control unit for controlling at least one of the oil pressure transmitted through the solenoid valve and the power transmitted by the motor to control advance and retreat of pistons included in the piston unit and adjust a braking force of the brake, wherein when the brake system is initialized, the electronic control unit retreats and depressurizes the pistons when a vehicle is in a parking brake state, and advances and pressurizes the pistons in case where the vehicle is not in a parking brake state.