Electromechanical Brake Control Using Hydraulic Pressure Feedback
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Solution Overview
Problem
Existing electromechanical brake systems lack effective methods to account for hydraulic pressure and vehicle grade, leading to potential overload, reduced service life, and energy inefficiency.
Innovation Solution
A method for controlling an electromechanical brake system that measures motor voltage and current to estimate the position and force of components, while also considering hydraulic pressure to adjust operations and maintain optimal load and clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electromechanical brake system operates without accounting for hydraulic pressure, then control simplicity is maintained, but brake system overload occurs and service life is reduced
Solution Approach 1:
The patent implements feedback control by continuously monitoring hydraulic pressure through existing sensors and using this information to adjust electromechanical brake actuator operation. The controller receives hydraulic pressure data and modulates the electromechanical actuator to prevent total brake load from exceeding maximum recommended levels, thereby resolving the contradiction between control simplicity and brake system reliability.
Solution Approach 2:
The patent introduces hydraulic pressure as an intermediary parameter that mediates between the hydraulic brake system and electromechanical brake system. By measuring hydraulic pressure and using it to adjust electromechanical actuator output, the system prevents load superposition from causing overload, thus extending brake system service life while maintaining relatively simple control architecture.
2Reliability
If electromechanical brake system applies maximum load to ensure parking safety, then parking reliability is improved, but energy consumption increases and service life is reduced
Solution Approach 1:
The patent applies partial action by adjusting the electromechanical brake load based on actual hydraulic pressure conditions rather than always applying maximum load. When hydraulic pressure indicates sufficient braking force is already present, the electromechanical actuator applies reduced load, preventing unnecessary energy consumption while maintaining adequate parking safety through the combined braking effect.
Solution Approach 2:
The patent changes the load parameter of the electromechanical brake actuator dynamically based on hydraulic pressure measurements. By modulating the actuator load according to real-time hydraulic pressure conditions, the system maintains parking safety through adaptive load adjustment rather than constant maximum loading, thereby reducing energy consumption and extending service life.
3Device complexity
If sensor inputs are not used for brake control, then system complexity is reduced, but fault redundancy is insufficient
Solution Approach 1:
The patent makes existing sensors multi-functional by using them for both their primary functions and brake control purposes. For example, existing wheel speed sensors and hydraulic pressure sensors are utilized for brake force estimation and control, eliminating the need for dedicated brake sensors while maintaining fault redundancy. This universal usage approach reduces system complexity while ensuring reliable operation even when individual sensors fail.
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 method ensures accurate control of the electromechanical brake system, preventing overload and maintaining energy efficiency by accounting for hydraulic pressure and vehicle grade, thus extending the service life of the braking system.
Implementation Method 1
an electromechanical brake system... employ both electromechanical systems... and hydraulic systems to act upon pistons that move one or more brake pads against a brake disc
Implementation Method 2
hydraulic systems... to act upon pistons that move one or more brake pads against a brake disc... consider the hydraulic pressure
Data Source
AI summary
A method of controlling an electromechanical brake system. The method comprises measuring a voltage of a motor, measuring a current of the motor, and estimating a position of a component of the electromechanical brake system based on the voltage and the current. The method comprises estimating a force imposed by the component based on the voltage and the current, and estimating a hydraulic pressure associated with a hydraulic brake system. In an apply operation, the force of the component is corrected based on the hydraulic pressure. In a release operation, the position of the component is corrected based on the hydraulic pressure.