Limitation of speed regulator for internal combustion engine of a pair

摘要

A speed governor for an internal combustion engine comprises a flexible reed having a portion overlying the air intake aperture of the carburetor. The overlying portion of the reed is movable by flexing of the reed from a normal open position to a closed position in which it at least partially blocks the air intake aperture. The reed is tuned to vibrate at a frequency approximately equal to that of air intake pulses at selected maximum engine speed. As the engine speed approaches the selected maximum, the air intake pulses induce resonant vibration of the reed so as to bring the overlying portion intermittently into closed position. The air intake of the engine is thereby reduced so as to limit engine speed in part by providing a lesser charge and in part by increasing the fuel/air ratio to the point where engine power is reduced.