Technical Paper
A Novel Method of Tuning a Stratified Scavenged Two-Stroke Engine
2006-11-13
2006-32-0055
Environmental concerns demand more stringent emission legislations concerning new power sources for handheld equipment like chainsaws and trimmers. Today the most common power source is the well-known two-stroke engine. This type of engine has been the natural choice due to low cost and high power density. The two-stroke engine, as we know it today is not able to comply with future emission demands due to its massive hydrocarbon pollutant. Future engine manufactures must come up with new cost efficient engine technologies that still deliver the same or improved performance for customer satisfaction. One of the solutions is the stratified scavenging two-stroke engine, which minimizes the unburnt hydrocarbon contents in the scavenging losses. An engine like this must have a dual feed system; one ordinary for air+fuel mixture and a second one that delivers pure air to the upper part of the scavenging channels.