Electromechanical Brake Control with Variable Front-Rear Brake Bias
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Solution Overview
Problem
The existing electromechanical brake systems face challenges in accurately determining the brake distribution ratio between front and rear wheels, especially under varying load conditions and road surface friction, leading to inefficient braking and increased risk of wheel lock situations.
Innovation Solution
An apparatus and method that adjust the brake distribution ratio based on a slope variable braking diagram, considering curb vehicle weight and gross vehicle weight characteristics, to prevent wheel lock and optimize braking efficiency, utilizing a processor to calculate and output control commands to a braking module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed brake distribution ratio is used based on CVW or GVW conditions, then the system is simple to operate, but wheel lock occurs earlier and braking efficiency decreases
Solution Approach 1:
The brake distribution ratio is dynamically adjusted during the braking process based on real-time wheel speed feedback. The control system transitions from a fixed distribution to a variable distribution that adapts to changing braking conditions, allowing the system to maintain optimal braking force allocation while preventing wheel lock
Solution Approach 2:
The system uses wheel speed sensors to provide feedback on the actual braking state of each wheel. This feedback is processed by the control unit, which then adjusts the brake distribution ratio in real-time to prevent wheel lock and maintain braking efficiency throughout the braking process
2Reliability
If ABS is activated immediately upon wheel lock detection, then wheel lock is prevented, but braking distance increases and braking performance decreases
Solution Approach 1:
The control system proactively adjusts the brake distribution ratio before wheel lock occurs by predicting the approaching lock condition based on wheel speed feedback. This preliminary adjustment prevents wheel lock from happening in the first place, avoiding the need for ABS activation and maintaining optimal braking performance throughout the process
Solution Approach 2:
The system skips the ABS activation phase by preventing wheel lock through continuous dynamic adjustment of brake distribution. By rushing through the critical phase before lock occurs, the system maintains continuous braking efficiency without the performance loss associated with ABS cycling
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 approach delays the activation of ABS, enhances braking efficiency, and maximizes braking performance by determining the optimal brake distribution ratio without measuring the vehicle load, ensuring effective braking across different conditions.
Implementation Method 1
The EMB is implemented in such a way that braking is realized by directly converting motor power into a straight moving force and pressing a pad
Implementation Method 2
The EWB is a method of implementing braking with a wedge action boosting an input by pressing a brake pad against a disk using a wedge assembly, which implements the wedge action boosting the input
Implementation Method 3
when a braking force that restrains a brake disc is greater than a braking force determined by a friction force on a road surface, wheel lock occurs
Data Source
AI summary
Disclosed are an apparatus for controlling an electromechanical brake system and a method thereof. An apparatus for controlling an electromechanical brake system of the present invention includes: a brake pedal detector unit configured to detect a stepping amount of a driver; a braking module configured to brake the vehicle; a memory configured to store a slope variable braking diagram set according to a characteristic value of the vehicle; and a processor configured to calculate a braking request value based on the stepping amount input from the brake pedal detector unit, and output a control command determined by a brake distribution ratio between front and rear wheels according to the braking request value to the braking module based on the slope variable braking diagram stored in the memory.