The effects of fuel-air ratio on speed have been shown to depend on the phenomena taking place in the carburetors of two-stroke gasoline engines. These phenomena and the subsequent reactions in the engine are described. Methods of reducing adverse effects are presented and computations for estimating vibrational limits of fluid flow in different types of carburetors with and without damping devices are given. It is shown that a constant fuel-air ratio over a wide range of speeds is important to economical operation of two-stroke cycle engines.
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