This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Investigating Scavenge Pressure of a Two Stroke Engine with a View to Alleviate Thermal Conditions
Annotation ability available
Sector:
Language:
English
Abstract
To improve the performance and durability of two stroke engines, pressure, volume and temperature of crankcase are the important parameters which need optimisation. The paper investigates these scavenge parameters of a small two stroke engine with a view to alleviate its thermal conditions.
Investigation of the pressure histories have been done with reference to pressure fluctuations, backflow, Kadenacy effect, list approximation, ring sticking, engine seizure, crankcase volume, crankcase temperature, cylinder barrel temperature, engine speed and physical parameters of the engine. By reducing the crankcase volume by 11 %, the maximum torque has increased by 11 % and shifted from 3000 RPM to 4000 RPM. The maximum power at 6000 RPM has increased by 12 %. Crankcase volume of 2 to 2.5 times the cylinder displacement is considered to be suitable.
An empirical relationship is evolved to predict the temperature in the cylinder barrel, which can be useful to predict temperature of engines within same family.
Recommended Content
Authors
Citation
Vora, K. and Ghosh, B., "Investigating Scavenge Pressure of a Two Stroke Engine with a View to Alleviate Thermal Conditions," SAE Technical Paper 950227, 1995, https://doi.org/10.4271/950227.Also In
References
- Ghosh B. Vora K.C. Marathe M.V. “Fuel Economy and Emission of two Stroke Engined Vehicles in India” Workshop on Emission & its Control for Small Two Stroke Engines I.O.C. Faridabad, India Nov. 1989
- Yasuo Harigaya et al “Surface Temperature and Wall Heat Flux in a Spark-Ignition Engine under Knocking and Non-knocking conditions” SAE 891795 1989
- Lee W. Schaefer H.J. “Analysis Local Pressures, Surface Temperature and Engine Damages under Knock Conditions” SAE 830508 1983
- Cipollone Roberto “On the Thermal Fields of I.C.E. Cylinder Liners” SAE 900455 1990
- Schweitzer, Paul H. “ Scavenging of Two Stroke Cycle Diesel Engines ” The Macmillan Company New York 1949
- Kadenacy Michel 1938
- List H. “Limit of Capacity from Two Stroke Cycle Diesel Engines” 1937
- Hiroshi Naito Taguchi Moriyuki “Some Development Aspects of Two Stroke Cycle Motorcycle Engines” SAE 660394 1966
- Blair G.P. “ The Basic Design of Two Stroke Engines ” SAE R-104 1990