45o 



Oil Engines. 



R, vapourised in the tube and ignited at N. When thus started 

 the flame from N heats the vapouriser and maintains the 

 necessary temperature of the pipe K. A similar lamp is seen 

 at K. L. S for heating the ignition tube T. When the compression 

 stroke of the engine takes place, the tube T is filled with some 

 of the combustible charge, and when the tube is maintained at 

 the proper temperature the mixture in it is ignited at or near 

 the moment of maximum compression pressure, and the whole 

 charge in vapouriser and combustion chamber is thus ignited. 

 When the engine has been working a short time the lamp N. O 

 is extinguished and only that for heating the tube T kept in use 

 The products of combustion of the starting lamp pass away 

 through the chimney G in the upper part of the vapouriser 

 hood, and by means of a removable cover G 1 the temperature 

 of the vapouriser may be varied. The valve casing B is con- 

 nected to the vapouriser by the screw collar F so as to be easily 

 removed from it, and the vapouriser is connected to the cylinder 

 by an easily re-made joint at J. These arrangements and the 

 covered hole O are specially made to permit ready access to 

 parts in which carbonaceous deposit takes place. 



The Tangye engine is made as a fixed and as a portable 

 engine, and the manufacturers are now making modified forms 

 of their engines to work with benzoline or alcohol, a type of 

 engine which will probably in the future be extensively used 

 for agricultural purposes. 



A simple form of engine for the smaller powers is illustrated 

 by Figs, ii and 12 as now being made by Messrs. Brown & 

 May, Fig. 1 1 being a longitudinal section of the engine, and Fig. 

 12 an end view. From Fig. 1 1 it will be seen that the crank A 

 is connected in the usual way by the rod B and pin C to the 

 piston E in the cylinder E water jacketted at J. The 

 vapouriser V is bolted to the end of the cylinder and has at 

 N an exhaust valve and at F an automatically opened air valve 

 working in the casing R against the resistance of the spring 

 U. At T is an ignition tube. The oil is supplied from the 

 tank G through an air regulator at K and stop cock H, leading 

 to an oil supply pipe and governor controlled valve seen at 

 A, S, Fig. 12, the governor also controlling by means of the air 

 throttle valve at D actuated by the rod R. 



