The Vaporizing Of Paraffin for High-Speed Motors
(Electric Ignition Type)

43 CHAPTER III. METHODS OF VAPORIZATION OF PARAFFIN WITH OIL ENGINES. Early Methods with Compressed-Air Atomizers.— The earliest method of vaporizing refined flash-proof oils —paraffin or kerozene grades—for use in engines of the electric ignition type, very closely resembles that now foliowed for atomizing the heavier distillates known as fuel oil in engines of the high-compression injection type, inasmuch as in both the fuel is supplied under pressure and is atomized by the agency of a stream of compressed air ; but liere the similarity ceases, as in the injection or Diesel engine, the fuel is supplied direct to the cylinder and against a compression sufficient to cause spontaneous ignition; whereas in the vaporizer engine, known as the Priestman, the fuel is supplied to an exhaust heated vaporizer, wlience it is drawn into the cylinder together with sufficient air to form an explosive mixture and ignited under a compression lower than that used in the ordinary gas engine. In accordance with this pioneer system, really development of oiie first in.tiod.uced by Etéve for using esseiice-de-petrole, a comparatively lov compression was used, the clearance or combustion space allowed ranging from 40 to 50 per cent, of the sweep of the piston. The most remarkable feature of these engines is their extremely silent action, despite