444 



Oil Engines; 



water jacket J, piston P, vapouriser V, ignition plug H S, 

 vapour valve A, air valve B, and exhaust valve C. 



The general arrangement differs materially from that of the 

 engines previously described. The vapouriser V, Figs. 6 and 7, is 

 in general form an annular chamber surmounted by a column E, 

 into which oil is fed from the sight feed glass tube O, Fig. 6, by a 

 tube T supplied by a little pump D, which is worked by the 

 mechanism which works the vapour valve at A, controlled by 



Fig. 6. — Clayton & Shuttleworth Oil Engine (12 h.p.) 



the hit-and-miss governor N. When the governor pushes the 

 vapour valve to admit oil vapour to the combustion chamber 

 the piston P is making its outward stroke and a partial vacuum 

 is formed in the vapouriser, air is drawn in the tube E with oil 

 let in at O, and at the same time a charge of vapour passes into 

 the cylinder at A and the cylinder fills up with air through the 

 air valve B. The latter and the exhaust valve C areworked by 

 lower levers N actuated by cams on the end of the shaft K, 

 which runs at half the speed of the crank shaft. When the 

 piston returns and compresses the charge, the hot vapouriser and 



