Development of a Low-Emission and High-Performance 2-Stroke Gasoline Engine (NiCE)

An important advantage of the 2-stroke cycle gasoline engine is that its emission of NO_x is very low. Experimental models of this engine showed that its percentage of exhaust gas contaminants could be made sufficiently low to meet the specified 1976 standard. Proper control of gas flow into the cylinder produced smooth combustion at idling. Thus, in the experimental model described in this paper, the usual draw-backs of the conventional engine (vibration, noise, knocking) have been eliminated so that vibration, power output, and fuel consumption are comparable to those found in a 4-stroke engine, without using an exhaust treatment system.