Scooter CVT StructureScooter CVT Structure

Instructor : Instructor : Ru - Li Lin

Team List : Team List : Syuan-KunSyuan-Kun JhuoJhuo 4991201649912016

Jheng-Yang Li 49912075Jheng-Yang Li 49912075

OutlinesOutlines

PrefacePreface

CVT CVT IntroductionIntroduction

How does CVT workHow does CVT work

CVT compareCVT compare

ConclusionsConclusions

ReferenceReference

PrefacePreface

MotorcycleMotorcycle development history development history

Motorcycle species introducedMotorcycle species introduced

Motorcycle major tectonicMotorcycle major tectonic

HistoryHistory

The world's first locomotive In 1769 by the French NiThe world's first locomotive In 1769 by the French Nicholas Cugnot the use of cholas Cugnot the use of Steam engineSteam engine composition composition

In 1885 In 1885 GermanyGermany e engineerngineer Wilhelm Daimler Gottlieb t Wilhelm Daimler Gottlieb the one ghe one gasolineasoline engine Installed wooden bicycle engine Installed wooden bicycle

SpeciesSpecies

ScooterScooter

Land RoverLand Rover

PedicabPedicab

Electric carsElectric cars

Major tectonicMajor tectonic

Transmission systemTransmission system

Power SystemsPower Systems

Brake SystemsBrake Systems

Cooling SystemsCooling Systems

Steering SystemSteering System

SuspensionSuspension

Motorcycle transmission systemMotorcycle transmission system

Continuously Variable TransmissionContinuously Variable Transmission

Traditional transmissionTraditional transmission

CVT IntroductionCVT Introduction

CVT is (Continuously Variable Transmission) CVT is (Continuously Variable Transmission) shorthand.shorthand.

Means uninterrupted transmission Means uninterrupted transmission mechanismmechanism

Commonly used in car or scooter motorcycle Commonly used in car or scooter motorcycle gear mechanismgear mechanism

StructureStructure

Front pulleyFront pulley

Pulley BladePulley Blade

Weights RollersWeights Rollers

Drive beltDrive belt

Rear Pulley Rear Pulley

Big SpringBig Spring

ClutchClutch

Front pulleyFront pulley

Material : Material : AluminumAluminum

Function: Driving wheel and shift mechanism cited Function: Driving wheel and shift mechanism cited rang cvtrang cvt

Pulley BladePulley Blade

Material : Material : Aluminum Aluminum

Function: Combined with the Function: Combined with the Front pulleyFront pulley grip belt, grip belt, with a cooling function in cvtwith a cooling function in cvt

Weights RollersWeights Rollers

Material : Copper Material : Copper oror Aluminum Aluminum

Function: Located behind the disk drive, it weighs Function: Located behind the disk drive, it weighs decision cvt gear speeddecision cvt gear speed

Drive beltDrive belt

Material :Rubber conjugates Material :Rubber conjugates

Function: Medium power transmission shifting Function: Medium power transmission shifting mechanismmechanism

Rear PulleyRear Pulley

Material :Steel Material :Steel

Function:Speed function for moving the front Pulley Function:Speed function for moving the front Pulley oppositeopposite

Big SpringBig Spring

Material :Steel or Chromium-molybdenum alloyMaterial :Steel or Chromium-molybdenum alloy

Function:Control Rear Pulley opened timing similar Function:Control Rear Pulley opened timing similar to to Weights RollersWeights Rollers

ClutchClutch

Material : Cast iron and Material : Cast iron and Aluminum Aluminum

Function: Control the timing of transmission and Function: Control the timing of transmission and gearbox divisiongearbox division

How does CVT workHow does CVT work

The CVT works upon the ratio of the diameter of the The CVT works upon the ratio of the diameter of the front and rear drive belt pulleys. Both front and rear front and rear drive belt pulleys. Both front and rear pulleys are an assembly of moving plates. pulleys are an assembly of moving plates.

Behind the moving plate of the front pulley , there are weBehind the moving plate of the front pulley , there are weighted rollers by centrifugal force, makes Rear Pulley proighted rollers by centrifugal force, makes Rear Pulley produce opening and closing change.duce opening and closing change.

Drive belt will follow the opening and closing of the Drive belt will follow the opening and closing of the Pulleys and do change positions to achieve the effect of Pulleys and do change positions to achieve the effect of the automatic transmissionthe automatic transmission

CVT compareCVT compare

ScooterScooter

AdvantageAdvantage

1. Simple structure1. Simple structure

2. Easy maintenance2. Easy maintenance

3. Smooth shifting process3. Smooth shifting process

ScooterScooter

Shortcoming Shortcoming

1. Transmission does not really1. Transmission does not really

2. Transmission and high temperature2. Transmission and high temperature

3. Lower life expectancy, requiring regular maintenance3. Lower life expectancy, requiring regular maintenance

ConclusionsConclusions

This way, the ratio between the two pulleys is changed This way, the ratio between the two pulleys is changed and therefore, the speed ratio between the engine and and therefore, the speed ratio between the engine and rear wheel is changed.rear wheel is changed.

ReferenceReference

http://www.bando.com.tw/product_description.php?PNo=151http://www.bando.com.tw/product_description.php?PNo=151

Http://modernvespa.com/forum/wiki-cvt-principles-how-it-works-howHttp://modernvespa.com/forum/wiki-cvt-principles-how-it-works-how-to-improve-it--to-improve-it-

http://www.recyclesources.com.tw/usersite/chmchm_product_showlihttp://www.recyclesources.com.tw/usersite/chmchm_product_showlist.html?sysidst.html?sysid=23483&option==23483&option=product&taskproduct&task==showlist&msgtypeshowlist&msgtype==sell&idsell&id=4636=4636

http://www.buybike.com.tw/web/SG?pageID=26494 http://www.buybike.com.tw/web/SG?pageID=26494

The Images from google queryThe Images from google query

Video Video https://www.youtube.com/watch?v=YNCMUZSQ0PYhttps://www.youtube.com/watch?v=YNCMUZSQ0PY

Thank youThank you