This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Investigation Into the Future of Two Stroke Motorcycle Engine
Annotation ability available
Sector:
Event:
National West Coast Meeting
Language:
English
Abstract
Following an analysis of the state of the art,the typical values of emissions and fuel consumption of 2 and 4 stroke engined motorcycles, which comply with Federal Std. 1978 are examined. In view of a further reduction in emission levels, experimental results of an unconventional 2 stroke engine, with reduced losses of fuel mixture during scavenging are reported. Considerable fuel economy is obtained while the reduction in emissions, although less remarkable is not negligible: about 50% of unburned hydrocarbons and 75% of carbon monoxide as compared to a conventional 2 stroke engine of same performances. Fuel consumption, as resulting from tests, is competitive with 4 stroke engines at wide open throttle and quite better at partial loads. Finally, a different approach to emission regulations, based on a total index of pollution, is proposed. On this basis the considered engine, which offers remarkable improvements in energy economy while keeping the advantages of the conventional 2 stroke engine,may be better evaluated.
Recommended Content
Authors
Topic
Citation
Batoni, G., "An Investigation Into the Future of Two Stroke Motorcycle Engine," SAE Technical Paper 780710, 1978, https://doi.org/10.4271/780710.Also In
References
- Kollman R.E. Lestz S.S. Meyer W.E. “Exhaust emissions characteristics of a small 2-Stroke Cycle spark ignition engine” SAE Paper 730159
- Asanuma T. Yanagihara S. “Gas sampling valve for measuring scavenging efficiency in high-speed two-stroke engines” SAE Transactions 1962 420
- Tsuchiya K. Hirano S. “Characteristics of 2-Stroke Motorcycle exhaust emission and effects of air-fuel ratio and ignition timing” SAE Paper 750908
- Yamagishi G. Sato T. Iwasa H. “A study of two stroke cycle fuel injection engines for exhaust gas purification” SAE Paper 720195
- Pichard J. “Two cycle stratified charge engine” Fourth International Symposium on Automotive Propulsion Systems III