Electronic Brake Actuator Position Sensing Integration
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Solution Overview
Problem
Conventional electronic brake systems are complex and cumbersome, requiring numerous components that complicate assembly and reduce productivity.
Innovation Solution
The proposed electronic brake system incorporates a compact actuator design featuring a motor with a stator and rotor, a power transmission unit that converts rotational motion to linear motion, and a sensing magnet for precise position detection, along with a double-acting piston to generate hydraulic pressure efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional electronic brake system is designed with multiple separate components for motor, power transmission, and position sensing, then the system can achieve precise control, but the device complexity and number of components increases
Solution Approach 1:
The motor position sensor is integrated directly into the electronic control unit housing, and the sensing magnet is coupled to the power transmission unit, combining multiple functions into fewer components while maintaining precise position sensing capability
Solution Approach 2:
The electronic control unit serves multiple functions: it houses the motor position sensor, processes control signals, and integrates with the power transmission unit through the sensing magnet, making a single component perform multiple roles in the system
2Productivity
If the actuator uses a compact integrated design, then the assemblability and productivity improve, but the manufacturing precision requirements increase
Solution Approach 1:
The actuator is divided into distinct functional modules (motor unit, power transmission unit, piston unit, electronic control unit) that can be manufactured separately and then assembled, reducing overall manufacturing complexity while maintaining precision through modular integration
Solution Approach 2:
The sensing magnet is coupled to the power transmission unit in a nested arrangement, and the motor position sensor is disposed within the electronic control unit housing, creating a compact integrated structure that simplifies assembly while maintaining precise relative positioning
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
This design reduces the number of components, enhances assemblability, and improves productivity while providing precise control over hydraulic pressure generation, enabling faster and more efficient braking.
Implementation Method 1
a motor having a stator and a rotor
Implementation Method 2
a power transmission unit having one end coupled to the rotor and the other end coupled to the piston to convert a rotational motion of the rotor into a linear motion of the piston
Implementation Method 3
a sensing magnet coupled to the power transmission unit to rotate along the motor
Implementation Method 4
a piston unit operated by the drive unit and including a piston reciprocating in a bore chamber provided in a piston housing to contain a fluid
Data Source
AI summary
Disclosed is an actuator of an electronic brake system including: a drive unit generating a power and including a motor having a stator and a rotor; a piston unit operated by the drive unit and including a piston reciprocating in a bore chamber provided in a piston housing to contain a fluid; a power transmission unit having one end coupled to the rotor and the other end coupled to the piston to convert a rotational motion of the rotor into a linear motion of the piston; a sensing magnet coupled to the power transmission unit to rotate along the motor; and a motor position sensor disposed coaxially with and spaced apart from the sensing magnet to sense a position of the motor based on the rotation of the sensing magnet.