Development of a Small Motorcycle EFI Retrofit System

2009-32-0034

11/03/2009

Event
Small Engine Technology Conference & Exposition
Authors Abstract
Content
Carbureted small displacement motorcycles are the most common form of road transport in Asia. Small displacement motorcycles have historically been low-cost and low-tech. In order to achieve the best overall performance, economy and emissions, a more sophisticated fuel injection system is required. To address the fuel consumption and emissions of existing “legacy” vehicles, we have developed an Electronic Fuel Injection (EFI) retrofit for common small motorcycles in Asia. The system leverages existing components as much as possible allowing focus on integration into the host vehicle and overall system tuning. This paper details the overall system design, modeling, component selection and system tuning of a 120 cc single cylinder four stroke EFI retrofit kit. The target vehicle is tested on dynamometer with stock carburetor settings, and with the EFI kit. The EFI system reduces fuel consumption by approximately 10%, HC emissions by 55%, CO emissions by 96% while doubling the NOx emissions and matching the carbureted system's power.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-32-0034
Pages
5
Citation
Lai, T., and GITANO-BRIGGS, H., "Development of a Small Motorcycle EFI Retrofit System," SAE Technical Paper 2009-32-0034, 2009, https://doi.org/10.4271/2009-32-0034.
Additional Details
Publisher
Published
Nov 3, 2009
Product Code
2009-32-0034
Content Type
Technical Paper
Language
English