This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Characteristics of 2-Stroke Motorcycle Exhaust HC Emission and Effects of Air-Fuel Ratio and Ignition Timing
Annotation ability available
Sector:
Language:
English
Abstract
This paper discusses the results of studies of the exhaust HC emission of 2-stroke engines for motorcycles.
The major factor producing HC emissions from 2-stroke engines is the short circuiting of fresh charge. Therefore, we made a study of the relation between the delivery ratio and the trapping efficiency by comparing the test results and the theoretical values of perfect mixing. We then verified the effects of engine speeds and irregular combustion to the trapping efficiency.
Tests were conducted to clarify the relationship between the air/fuel ratio and HC concentration and mass HC emission, and the test results were compared with the theoretical values. In addition, a study was made on how to reduce the mass HC emission by optimizing air/fuel ratio.
Next, we launched tests to study the effects of ignition timing on HC emissions as well as the ignition timing characteristics and throttle opening and engine speed.
Recommended Content
Authors
Topic
Citation
Tsuchiya, K. and Hirano, S., "Characteristics of 2-Stroke Motorcycle Exhaust HC Emission and Effects of Air-Fuel Ratio and Ignition Timing," SAE Technical Paper 750908, 1975, https://doi.org/10.4271/750908.Also In
References
- Ishihara Mr. Oka Mr. “Improvement of Trapping Efficiency Measuring Method of 2-Stroke Engines by Means of Exhaust Analysis.” Internal Combustion Engines 9 Jan. 1970
- Ishihara S. “Emission Characteristics of 2-Stroke Engines.” Internal Combustion Engines 11 Nov. 1972
- Yanagihara Mr. Shinoyama Mr. Shinohara Mr. “Gases Exhausted From 2-Stroke Gasoline Engine.” Machine Testing Institute Gazette 18 4 1964
- Yamagishi Mr. Sato Mr. Iwasa Mr. “A Study of 2-Stroke Gasoline Injection Engines Designed for Clean Exhaust Gases.” Internal Combustion Engines 9 Mar. 1970
- Yamagishi Mr. Sato Mr. “Reality of Emission Reduction Measures for 2-Stroke Engines for Lightweight Motor Vehicles.” Journal of the J.S.M.E. 76 653