The GreenWheel: The design of a self-contained bicycle electric-assist system.

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Arthur PetronSmart Cities

3. OriginalityeBike ComparisonContributions to Field

4. EvaluationEvaluation MethodologyExpected Outcomes

Schedule

1. PurposeProblemImportance

2. ApproachModules/PartsTechnology and Testing

Problem: Assisted biking dramatically expands the market, but current eBike systems are unintelligent, ugly, and cumbersome.

Importance: The research areas required are motor design, electrical engineering, mechanical engineering, and industrial design. It is intended that the work be published in a way that makes is a useful reference for the process of building an electromechanical system.

PurposeGeneral Information

Purpose The Problem and Importance

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ABS braking

Data logging and workout plans

Fully wireless control

Gearless drivetrain

Integrated energy storage and charger in wheel

Ratiometric torque control mode

Water-resistant

Approach featuresApproach Features

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Two main modules

Module Breakdown modules

Approach Module Breakdown Modules

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Module Breakdown modulesApproach Module Breakdown Modules

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Outer Casing

Motor

Electronics and Batteries

Module Breakdown modulesApproach Module Breakdown Modules

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Gear and Mount (15)

Enclosure (19)

Electronics and Batteries(16, 17)

Intelligent velocity matching toque assist can provide either adjustable 1x - 2x torque or full torque

Data-logging enables users to retrieve vital statistics such as calories burned or distance traveled

Safety countermeasures provide back-up circuitry in the event of hardware failure

Technology onboard intelligence

Approach Technology Onboard Intelligence

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Mechanical and Electronic devices can be tested to determine specifications and areas of improvement

User experience is determined by mass interaction with the device in order to determine flaws

The look and feel of the device (subjective artistic impression) gauged by polling, art history, etc.

Testing methodology Approach Testing Methodology

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Originality electric bikes Originality Competitive Analysis E-bikes

GreenWheel BionX Schwinn GreenLine UltraMotorFeature          Cost $1,100 $1,700  $3,500  $1,300  $2,700 Battery Cycle Life 2500 800 2000 800 800

Range 15-25 miles25-30

mi 20 mi 20 miMotor Power 800W 500W 180 W 250W 500WFits any Bike Yes No No No No

Top Speed 30 mph25 mph 15 mph 20 mph

Data Logging Yes No No No NoTorque Sensing Yes No No No NoExercise Mode Yes Bo No No NoWater Proof Yes No Yes Yes YesIntegrated Battery Protection Yes No No No YesRegenerative Braking Yes No No No No

Charge Time 15 minutes30 

minutes 3.5 Hours

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GreenWheel is the least expensive kit when

paired with a < $200 bicycle

Most powerful motor

Competitive cycle life and charge time

Most advanced features(ABS/data-logging/workout plan potential)

Competitive Analysis advantages

Originality Competitive Analysis GreenWheel Advantages

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As much about the innovations required to make the device as the process through which the innovations are made

Goal is to have a guide, or design reference, that can be used by others to design anything from a better toaster to a world ending robot

ContributionsOriginality Contributions to the Field

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In-field faculty and local expert consultations to determine the extent to which the goals of the work have been met

Physical evaluation similar to testing

Evaluation methodology Evaluation Methodology

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Strong Engineering

Successful Industrial Design

Useful Resource to Others

Evaluation expected outcomes Evaluation Expected Outcomes

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