Bicycle Suspension Control for Wheelspin and Slip Prevention

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Solution Overview

Problem

Existing human-powered vehicle control systems lack effective methods to control the rotation state of wheels beyond using auxiliary driving devices, particularly in managing wheelspin and slip states, which can lead to inefficient propulsion and rider discomfort.

Innovation Solution

A human-powered vehicle control device equipped with detectors to monitor driving force and riding state, coupled with an electronic controller that adjusts the operation state of suspension systems between locked and unlocked states to manage wheelspin and slip, ensuring optimal wheel interaction with the road surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the suspension device is kept in a locked state to maintain vehicle stability, then vehicle stability is improved, but wheel rotation control capability deteriorates

Engineering Contradiction:
Improvevehicle stabilityVSAvoidwheel rotation control capability
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The suspension device dynamically switches between locked and unlocked states based on real-time detection of wheel rotation conditions. The electronic controller receives detection results from the detector and automatically adjusts the suspension state, enabling the system to adapt to varying road conditions and wheel states, thus resolving the contradiction between stability and adaptability

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If the suspension device is switched to unlocked state to control wheel rotation, then wheel rotation control capability is improved, but vehicle stability deteriorates

Engineering Contradiction:
Improvewheel rotation control capabilityVSAvoidvehicle stability
Core Design Contradiction:
Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The system employs a feedback mechanism where the detector continuously monitors wheel rotation state and transmits this information to the electronic controller. The controller processes this feedback and adjusts the suspension device accordingly, creating a closed-loop control system that maintains vehicle stability while enabling effective wheel rotation control when needed

Inventive Principle:
Principle #23Feedback

3Power

If auxiliary driving device is used to control wheel rotation, then propulsion assistance is improved, but system complexity increases

Engineering Contradiction:
Improvepropulsion assistanceVSAvoidsystem complexity
Core Design Contradiction:
PowerVSDevice complexity

Solution Approach 1:

The suspension device is designed to serve multiple functions: it provides suspension support during normal operation and acts as a wheel rotation control mechanism when wheelspin or slip is detected. This multi-functionality eliminates the need for a separate auxiliary driving device for rotation control, reducing system complexity while maintaining propulsion assistance capabilities

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11840311B2Human-powered vehicle control device, suspension system, and human-powered vehicle
Publication Date: 2023.12.12 SHIMANO INC
  • US11840311B2 patent drawing
  • US11840311B2 patent drawing
  • US11840311B2 patent drawing

AI summary

A control system for a human-powered vehicle includes a suspension device, at least one detector, an electronic controller. The suspension device includes a first suspension and a second suspension. The at least one detector is configured to detect information related to at least two conditions of the human-powered vehicle. The conditions include an operating state of the suspension device, a power input to the human-powered vehicle, a torque of a power transmission component, and a rotating state of the power transmission component. The electronic controller is configured to selectively control the suspension device between a first operating state and a second operating state in accordance with a detection result obtained by the at least one detector.