. Gasoline characteristics . of pressure. In motor car?work, gasoline as it is fed to the carbureters, is not underatmospheric pressure. The s\iction of the engine or thevacuum feed reduces the pressure on the gasoline and thepressure feed, and other methods increase the the gasoline does not actually boil in ordinarymotor car practice, it does something similar - it ease with which this vaporization takes place determinesthe ease with which the engine is started and run. Thepresstire and temperature of the gasoline have a great dealto do with the vaporization.
. Gasoline characteristics . of pressure. In motor car?work, gasoline as it is fed to the carbureters, is not underatmospheric pressure. The s\iction of the engine or thevacuum feed reduces the pressure on the gasoline and thepressure feed, and other methods increase the the gasoline does not actually boil in ordinarymotor car practice, it does something similar - it ease with which this vaporization takes place determinesthe ease with which the engine is started and run. Thepresstire and temperature of the gasoline have a great dealto do with the vaporization. If the pressure of the atmos-phere is low, the boiling point of the gasoline will be lowand also it will vaporize more rapidly than at a higherpressure. Ifeagurements of vaporization points under variouspresstires are hard to obtain, but the variotis boiling pointsare easily determined. Apparatus was set up as shown inFigure I. The partial vacutun was created by the aspirationeffect of the water passing the opening (A). 15. 16 The degree of vacuum was indicated in inches ofmerciiry on the scale (B) «md a water trap (C) prevented anywater from backing up into the flask (D). Piping and rubbertubing connected the water trap with the flask through thepetcock (E). a thermometer was sealed into a rubber stopperand the stopper, in turn, sealed into the flask after a sam-ple of gasoline had been selected. The temperature of thegasoline was controlled by the steam bath (G) which con-sisted merely of a pail of water into which steam is in-jected through the valve (H). By partly closing the pet-cock (E) any degree of vacuxim within the range of the ap-paratus may be obtained. Owing to slight leaks at the var-ious connections, a vacuum of 21 inches was the maximumobtainable. When the apparatus was first set up, the watertrap was not inserted and difficulties were encoimtered bythe water sucking into the mercvury tube and flask. Thewater trap, consisting of a short piece of pipe, closed at
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookidgasolinecharacte00moua
