A Carburetter for Heavy and Light Fuels.
Page 25
If you've noticed an error in this article please click here to report it so we can fix it.
ACARBURETTING device by which any existing petrol engine can be converted for the burning of either heavy or light liquid fuels at will is being marketed by A.B.C. Patents, 20, Church Street, Cambridge Circus,. London, W.I.
This device is known as the Keros carburetter and it operates on the principle of vaporizing the :fuel prior to its being mixed with cold air for consumption by the engine.
The cost of the equipment is about 115, which is not excessive, considering that it forms the equivalent of two carburetters. It is really designed to start on petrol and then to work on either paraffin, or heavy gas oil, but it is claimed that it works quite as efficiently on petrol, and that when used with the lighter fuel it has, in many cases, effected considerable economy as compared with the previous consumption.
The vaporizing means, -when petrol only is used, consists of a small copper tube placed around the exterior of the exhaust manifold, but when it is desired to utilize heavy oils this tube is replaced by an iron one fitted into the interior of the manifold, thus extracting greater heat from the hat gases.
The carburetter is of the single-jet type end is compensated by a device known as an aspirator, which is shown by the letter A in the sectional view. By turning the screw (B) it is possible to set the carburetter to run slowly by bringing the aspirator nearer, or removing it frOm, the jet (C). This simple setting is all that is required to allow the engine to run slowly or to develop its full power.
The aspirator communicates with the auction pipe between the throttle and
inlet pipe, and it, therefore, collects all the fuel which merges from the jet, separates it from the mass of air, causes it to vaporize and then returns it to the carburetter in the form of vapour, which is mixed intimatery with cold air before burning. The fuel, together with a small quantity of air, passes along the tube (A, G, H. I. J), of which the section H, I forms the vaporizing portion either in or around the exhaust manifold.
In all cases the mixing of the vapour and the air takes place beyond the barrel throttle (D) which regulates the admission of the air and, consequently, the speed of the engine.
When it is desired to run or to start on petrol, the Bowden-controlled jet (L), which is shown inset, is opened and the clash-controlled tap at the base of the carburetter closed. The heavy fuel is then prevented from reaching the jet and the engine will run on petrol alone.
• One advantage of the employment of the Bowden-controlled valve for the ad mission of petrol is that the engine may ' be run on petrol at any required moment without draining the float chamber.
We have not yet Lad an opportunity of making a practical test of this apparatus, but 'amnia advise those inrovse.
ted to write to the address given