Rear-Wheel Torque Split Control for Stable Motorcycle Sliding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Achieving a controlled, stable slide in single-track motor vehicles is difficult due to the challenges in accurately controlling the high slip and reduced lateral guidance force required for effective deceleration during turns.
Innovation Solution
A method involving a control unit that determines the total torque required for a desired driving maneuver by combining braking partial torque and engine partial torque, allowing for precise control of the rear wheel torque to initiate a controlled slide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a braking system is activated to generate high braking torques, then deceleration performance is improved, but control accuracy and control speed deteriorate
Solution Approach 1:
The total braking torque requirement is segmented into two parts: a braking partial torque generated by the braking system and an engine partial torque generated by the engine. This segmentation allows each subsystem to operate in its optimal range while achieving the overall control goal.
Solution Approach 2:
The braking system and engine are merged into a coordinated control system where both actuators work together to generate the total required torque. The control unit distributes the torque demand between these two systems, combining their strengths to achieve both high power and high precision control.
2Measurement precision
If the engine is activated to provide high accuracy and control speed, then control precision is improved, but available torque range is limited
Solution Approach 1:
The torque generation task is segmented between the engine and braking system. The engine handles the precision control portion within its optimal torque range, while the braking system provides the additional torque capacity needed for high-performance deceleration.
Solution Approach 2:
The engine and braking system are merged into a unified torque generation system. The control unit coordinates both actuators to combine their torque outputs, achieving a total torque range that exceeds what either system could provide alone while maintaining the engine's high control accuracy.
3Power
If a controlled slide is initiated by overbraking the rear wheel, then deceleration performance is improved, but stability and ease of control deteriorate
Solution Approach 1:
The braking system and engine are merged into a coordinated control system that jointly manages the slide initiation and maintenance. This coordination provides stable and controllable slide behavior, enhancing both safety and driving dynamics.
Solution Approach 2:
The control unit continuously monitors wheel slip and adjusts the combined braking and engine torque accordingly, providing feedback control that maintains the desired slide state while ensuring stability and ease of operation.
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 enables a stronger deceleration of the motor vehicle than normal braking, allowing for earlier initiation of braking during turns and improved turning and braking behavior.
Implementation Method 1
High braking torques can be generated on the wheel by the braking system
Implementation Method 2
The engine offers high accuracy and control speed, but with limited torque range
Data Source
AI summary
A method and a system for decelerating a single-track motor vehicle, includes using a control unit to determine a total torque of a wheel of the motor vehicle required for a desired riding maneuver, in particular a controlled slip of a rear wheel, determine, a braking partial torque and a motor partial torque as a function of the total torque required, and generate the braking partial torque on the wheel by controlling a brake system of the motor vehicle and generating the motor partial torque on the wheel by controlling a motor of the motor vehicle The invention further includes a single-track motor vehicle configured to execute the decelerating method.