Studies on the Application of LP Gas for Farm Tractor Drive (III)

Shifting Performance of LP Gas and Gasoline

Abstract

Experimental researches were performed, in order to compare the efficiencies of the fuels for the LP gas carburetion in the case of shifhing between LP gas and gasoline. The shifting is done by the solenoid valve with three point switch. The results of the observation are shown by the output designation of the first variation, the second variation, total variation, difference of variation, the ratio of output, as well as the time necessary, the ratio of time, the quantity of fuel and air necessary, the ratio of the quantity, the venturi speed of the carburettor.
We observed the two defects in shifting from gasoline to LP gas that it takes a long time to shift, and the output cannot reach the definite value, though the ratio of output is within 10% and hovering of output is very little. Therefore, the excellent efficiency can be expected when enough time is given for shifting.
In the case of shifting from LP gas to gasoline, the time necessary for shifting is 10sec. less than the former, and after shifting we get the higher output than before. But the ratio of output and the hovering of ontput is so big that efliciency of shifting is poor.