Role of Scavenging in Improving Irregular Combustion and Misfiring in Small Two Stroke Engines 951782
The role of transfer port geometry in improving scavenging near the spark plug with consequent improvement in cyclic variations and irregular combustion have been studied through engine tests by recording the pressure-time data of many cycles with the original and modified ports on a 150cc crankcase compressed shnurle loop scavenged two stroke engine under various operating conditions. The results show that there is an optimum upsweep angle which gives reduction in cyclic variations and lowering of delivery ratio at which irregular combustion starts. The side sweep angle does not seem to affect much. The improvement seems to be closely related to the reduction in the duration of the initial phase of combustion and its variations.
Citation: Sharma, J., Abraham, M., Sharma, M., and Prakash, S., "Role of Scavenging in Improving Irregular Combustion and Misfiring in Small Two Stroke Engines," SAE Technical Paper 951782, 1995, https://doi.org/10.4271/951782. Download Citation
Janardan Sharma, Mathew Abraham, M. L. Sharma, Satya Prakash
Indian Institute of Petroleum
Small Engine Technology Conference & Exposition
Proceedings of the 1995 Small Engine Technology Conference-P-292