Split Electronic Brake Layout With Foldable Pedal Control
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Solution Overview
Problem
Conventional electronic brake systems face issues with reliability in abnormal operating modes, limited design freedom due to module size and installation constraints, and discomfort during autonomous driving due to exposed brake pedals.
Innovation Solution
An electronic brake system with a first block for mechanical operation and a second block for electronic control, connected by hydraulic lines, featuring a pedal folding device and hydraulic circuits with valves and sensors, allowing for adjustable brake pedal positioning and reliable hydraulic pressure generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic brake systems are used, then braking force is generated, but risk of wheel lockup and reduced stability occurs
Solution Approach 1:
The brake system dynamically adjusts braking force distribution between front and rear wheels based on real-time vehicle state (acceleration, steering angle, brake pedal position). The ECU continuously modifies brake pressure to maintain optimal braking force while preventing wheel lockup, transforming the static hydraulic system into a dynamic control system that adapts to changing driving conditions.
Solution Approach 2:
The system implements closed-loop feedback control by monitoring wheel speed, vehicle acceleration, and steering angle through sensors, then using this information to adjust brake pressure via the ECU. The feedback mechanism detects wheel lockup conditions and automatically modulates braking force to maintain vehicle stability while preserving braking effectiveness.
2Reliability
If electronic control units and sensors are added, then braking control is improved, but device complexity increases
Solution Approach 1:
The ECU serves multiple functions: it controls brake pressure distribution, monitors wheel speed, processes sensor data, and implements stability control algorithms. By consolidating these diverse functions into a single multi-functional control unit, the system achieves improved braking control while limiting the increase in overall device complexity through functional integration.
Solution Approach 2:
The ECU acts as an intermediary between various sensors (wheel speed sensors, acceleration sensors, steering angle sensors) and the brake actuator. This intermediary component coordinates information from multiple sources and translates it into appropriate brake control actions, simplifying the system architecture by providing a centralized control interface rather than requiring direct connections between all components.
3Loss of time
If brake pressure is increased, then stopping distance is reduced, but wheel lockup risk increases
Solution Approach 1:
The brake control system applies periodic modulation to brake pressure, rapidly increasing and decreasing pressure in controlled cycles. This periodic action allows the system to maintain high average braking force for reduced stopping distance while preventing sustained high pressure that would cause wheel lockup. The ECU adjusts the frequency and amplitude of pressure modulation based on wheel speed and slip conditions.
Solution Approach 2:
The system dynamically changes brake pressure parameters (magnitude, duration, distribution) based on real-time wheel speed and vehicle state. By continuously adjusting these parameters, the system optimizes the balance between applying sufficient braking force for short stopping distance and maintaining brake pressure below the threshold that would cause wheel lockup, adapting to changing driving conditions moment by moment.
Data Source
Figure 1
AI summary
An electronic brake system is disclosed. An electronic brake system according to the present embodiment comprises: a first block in which an operating part operated by being linked with a brake pedal is arranged; a second block in which an electronic part electronically operated and controlled by means of an electronic control unit is arranged; and a connection line for hydraulically connecting the first block to the second block, wherein the first block and the second block can be provided at locations spaced apart from each other in a vehicle, and thus the mountability of the brake system and the degree of freedom of vehicle design can be improved.