Exhaust Emission and Combustion Stability Characteristics of Combustion Chambers Used In Small Air Cooled Four Stroke Industrial Engines

The continuing refinement of the small engine as a power unit for such diverse applications as generators and lawn care equipment has forced designers to consider aspects other than those of production cost in the selection of combustion chamber geometry. Combustion stability, noise and exhaust emissions are becoming increasingly important in the development of new engine models. This paper reports on work which is being carried out to identify the combustion systems required for future engines.