Abstract
For the purpose of reducing specific fuel consumption and exhaust emissions of two-cycle spark-ignition engines, an experimental single-cylinder engine was constructed, which was provided with an overhead poppet valve for exhaust and reed valves for air-head scavenging. In this paper is reported the effect of air-head uniflow scavenging in comparison with the Schnurle scavenging on reducing specific fuel consumption and exhaust emission of two-cycle spark-ignition engine.