Electric Motorcycle Brake Torque Blending for ABS Support
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Solution Overview
Problem
Existing brake assist systems for electric motorcycles face challenges in achieving sufficient braking torque due to the limitations of the maximum torque generated by electric motors, necessitating additional hydraulic components to meet ABS system requirements.
Innovation Solution
A method combining electromotive and non-electromotive braking functions, utilizing an electric motor to modulate braking torque in conjunction with a hydraulic braking system, and a control unit to manage torque distribution, reducing the need for additional hydraulic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electric motor alone is used for braking, then the device complexity is reduced, but the braking torque is insufficient to meet ABS system requirements
Solution Approach 1:
The patent combines the electric motor's electromotive braking function with a simplified hydraulic braking system. The control unit coordinates both systems to work together, merging their braking capabilities to achieve sufficient total braking torque while reducing the number of hydraulic components compared to traditional ABS systems.
Solution Approach 2:
The electric motor serves multiple functions: it provides drive torque for acceleration and also generates braking torque through electromagnetic resistance. This multi-functionality allows the same component to contribute to both propulsion and braking, reducing the need for dedicated braking components.
2Force
If additional hydraulic components are added to increase braking torque, then the braking performance is improved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts and removes unnecessary hydraulic components from the traditional ABS system. By relying on the electric motor's inherent braking capability, complex hydraulic control mechanisms are eliminated or simplified, retaining only the essential hydraulic components needed to supplement the motor's braking torque.
Solution Approach 2:
The patent replaces a purely mechanical/hydraulic braking system with a hybrid system that uses the electric motor's electromagnetic field for braking. This substitution leverages the motor's existing electromagnetic components to provide braking force, reducing reliance on complex mechanical braking mechanisms.
3Force
If the electric motor generates maximum braking torque, then the braking performance is improved, but the wheel may lock up
Solution Approach 1:
The control unit continuously monitors wheel speed and braking torque, using feedback to dynamically adjust the motor's braking output. When the wheel approaches locking conditions, the control unit reduces the motor torque or modulates it pulsively, maintaining reliable braking while preventing wheel lockup.
Solution Approach 2:
The patent implements dynamic torque modulation where the electric motor's braking torque is continuously adjusted based on real-time operating conditions. The control unit varies the torque output to optimize braking performance while preventing wheel lockup, transitioning smoothly between different torque levels rather than applying fixed maximum torque.
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 enhances braking performance and reduces costs by leveraging the electric motor's dynamic torque modulation capabilities while ensuring effective ABS functionality with minimal additional hardware.
Implementation Method 1
determining an engine torque to be generated by an electric motor of the electric motorcycle as a function of the total braking torque
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method for operating a brake-support system (4) for an electric motorcycle (1), having the steps of: determining a total braking torque (7) required to brake the electric motorcycle (1); determining a motor torque (12) to be generated by an electric motor (3) of the electric motorcycle (1) on the basis of the total braking torque (7) and a maximum braking torque (11) which can be generated by a brake system (5) of the electric motorcycle (1); and, if the maximum braking torque (11) is generated, generating a control command (13) for controlling the electric motor (3) so that the motor torque (12) is generated together with the maximum braking torque (11).