Coupled Braking Control Using Hydraulic and Regenerative Force Split
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Solution Overview
Problem
Traditional braking systems in coupled braking systems face challenges in adjusting hydraulic braking force due to the absence of decoupling, leading to uncomfortable braking experiences and wear on components.
Innovation Solution
A method and device that utilize both hydraulic and regenerative braking forces to determine a comfortable braking force based on the brake pedal opening degree, distributing these forces to achieve smooth braking in coupled systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional braking systems are used in coupled braking systems, then the braking function is achieved, but the braking comfort deteriorates due to noticeable nodding and vibration
Solution Approach 1:
The braking force is segmented into two independent components: regenerative braking force and hydraulic braking force. The controller separately controls each component based on pedal opening degree, allowing independent optimization of each braking mechanism to reduce vibrations and improve comfort
Solution Approach 2:
The system dynamically adjusts the distribution ratio between regenerative and hydraulic braking forces based on the brake pedal opening degree. By changing the parameter of force distribution according to pedal position, the system optimizes braking comfort across different braking intensities while minimizing harmful vibrations
2Ease of operation
If hydraulic braking force is adjusted in coupled braking systems, then braking control is achieved, but component wear increases
Solution Approach 1:
The regenerative braking system serves itself by directly converting kinetic energy to electrical energy stored in the battery, eliminating the need for mechanical contact components. This self-service mechanism reduces wear on traditional friction-based braking components while maintaining effective braking control
Solution Approach 2:
The system replaces the traditional purely mechanical hydraulic braking with a hybrid approach that substitutes regenerative braking (electrical energy conversion) for a portion of the mechanical braking force. This substitution reduces the reliance on mechanical friction components, thereby reducing wear
3Reliability
If both hydraulic and regenerative braking forces are used, then braking performance is improved, but system complexity increases
Solution Approach 1:
The motor serves multiple functions: it acts as a drive motor during acceleration and as a regenerative braking device during deceleration. This multi-functionality allows the system to achieve improved braking performance without adding entirely separate braking mechanisms, thereby limiting the increase in system complexity
Solution Approach 2:
The controller continuously monitors the brake pedal opening degree and dynamically adjusts the distribution between regenerative and hydraulic braking forces. This feedback mechanism automates the complex coordination between two braking systems, improving braking performance while managing system complexity through intelligent control rather than mechanical complexity
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
Improves braking performance and comfort by simultaneously using hydraulic and regenerative braking, reducing wear and enhancing the driving experience.
Implementation Method 1
the motor controller is configured to convert the motor into a generator to store energy in the battery
Data Source
AI summary
A method, a device, a controller and a computer program product for comfortable braking are disclosed. The method includes (i) determining a comfortable braking force based on an opening degree of a brake pedal of a vehicle, (ii) determining a hydraulic braking force and a regenerative braking force based on the comfortable braking force, and (iii) performing comfortable braking on the vehicle based on the hydraulic braking force and the regenerative braking force. By way of the above, the comfortable braking function may be realized in a coupled braking system. By simultaneously utilizing the hydraulic braking force and the regenerative braking force for comfortable braking, the braking performance of the vehicle is improved, the braking process is made smoother and more comfortable, and the driving experience of a driver and passengers is improved.