Development of Electronically Controlled Belt-type CVT for Motorcycles

2005-32-0024

10/12/2005

Event
Small Engine Technology Conference & Exposition
Authors Abstract
Content
An electronically controlled belt-type CVT (Continuously Variable Transmission) has been developed for scooter type two-wheeled vehicles. Related to two-wheeled vehicles, the electronically controlled belt-type CVT has advantages over the conventional belt-type CVT, such as more compact and lighter weight. This was achieved by developing a new rubber belt-type. The new rubber belt-type CVT uses a rubber belt with high friction coefficient and pulleys made of aluminum. To obtain good shifting characteristics, the desired speed ratio related to throttle opening and drive speed is calculated. When moving, the actual speed ratio automatically adjusts to the desired value. For the shift modes, three shift modes, two automatic modes and one manual mode with six-speeds were prepared. The electronically controlled CVT increased the range of usable engine speeds compared to the conventional belt-type CVT. Therefore good drivability is maintained. Good fuel consumption, exhaust emission, low noise were also achieved. By pressing the switches located on the handlebar the riders can change the shift mode according to the situation. The switches are arranged on the handlebar close to the hand for easy hand operation.
Meta TagsDetails
DOI
https://doi.org/10.4271/2005-32-0024
Pages
7
Citation
ASUMI, M., ISHIKAWA, H., MORI, K., and MATSUDAIRA, N., "Development of Electronically Controlled Belt-type CVT for Motorcycles," SAE Technical Paper 2005-32-0024, 2005, https://doi.org/10.4271/2005-32-0024.
Additional Details
Publisher
Published
Oct 12, 2005
Product Code
2005-32-0024
Content Type
Technical Paper
Language
English