A New Concept of Stratified Charge Two Stroke Engine Yui and Ohnishi Combustion Process (YOCP) 690468

A unique process for stratified charge in a 2 stroke gasoline engine provides outstanding improvement in performance and makes possible the control of known pollutants in exhaust emission without supplementary devices. The proposed process is intended to achieve virtual control of CO, unburned hydrocarbons, and NOX while maintaining satisfactory fuel consumption without erratic or irregular operation. Thus, a large part of the disadvantages of the 2 stroke engine will be overcome. No critical relationship exists among fuel components and response is good. Coupled with these features are adequately large power values and no smoke limit to pose opacity problems.