Motorcycle Active Steering Influence System for Wobble Prevention
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Solution Overview
Problem
Motorcycles with driver assistance systems face challenges in maintaining riding comfort and safety due to excessive intervention in vehicle dynamics, particularly during sudden accelerations or decelerations, which can cause unintended movements like fishtailing or wobbling.
Innovation Solution
The integration of a driver assistance system and an active steering influence system that communicate through signal instructions to actively modify the steering system's state, counteracting changes in movement direction associated with longitudinal accelerations, using semi-active damping or force applications to neutralize excessive directional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver assistance system actively intervenes to effectuate longitudinal accelerations (e.g., braking or acceleration), then the vehicle's speed control or safety is improved, but unintended steering movements (fishtailing, wobbling) occur due to the motorcycle's dynamic response to longitudinal forces
Solution Approach 1:
The control unit preemptively generates a counter-steering influence signal when detecting that the driver assistance system will effectuate a longitudinal acceleration. This counter-action is applied before or during the longitudinal acceleration to compensate for the expected steering movement, thereby preventing fishtailing or wobbling while maintaining the speed control function
Solution Approach 2:
The control unit acts as an intermediary between the driver assistance system and the steering system. It receives control signals from the driver assistance system, processes them to determine appropriate counter-steering influences, and transmits these to the steering system, thereby mediating the interaction between longitudinal and steering dynamics
2Ease of operation
If the active steering influence system counters steering movements during driver assistance interventions, then riding comfort and safety are improved, but the system complexity increases due to integration requirements
Solution Approach 1:
The control unit combines the functions of the driver assistance system and the active steering influence system into a single integrated control architecture. By merging these systems, the patent reduces overall system complexity compared to having separate independent systems, while still enabling the counter-steering functionality to improve riding comfort
Data Source
AI summary
A motorcycle, including method and control unit for controlling an active steering influence system, which is for actively influencing steering motions on a front wheel. A driver assistance system is for effectuating, with control instructions to components of the motorcycle, longitudinal accelerations. The driver assistance and active steering influence systems are for a signal communication with each other, e.g., via lines. The driver assistance system is for outputting, before/while outputting a control instruction, a signal instruction to the active steering influence system so that the active steering influence system, via an active modification of its state, counters a change of a movement direction, which is associated with the longitudinal acceleration to be effectuated with the control instruction. Accordingly, driving comfort or safety while riding is improve-able, in that, for example, fishtailing or wobbling motions, which are unexpected and are initiated by interventions of driver assistance system, are largely prevented.