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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
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