From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Complete patent specification for improvements in carburettors for internal combustion engines.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page277 | |
| Date | 26th May 1914 | |
| Godward Carburetter No 1 N° 12,930 A.D. 1914 Date of Application, 26th May, 1914—Accepted, 13th May, 1915 COMPLETE SPECIFICATION. Improvements in Carburettors of the “Internal Combustion Engine” Type. I, ERNEST ROBERT GODWARD, of No. 40, Dowling Street, Dunedin, in the Dominion of New Zealand, Cycle Manufacturer, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:— 5 This invention relates to carburettor apparatus used for carburetting air to produce fuel for internal combustion engines. In carburettors of the type most frequently used, the liquid fuel was introduced into the combustion chamber from a point in close proximity thereto and in 10 quantities in excess of that required to carburet the air with the result that a certain amount of raw fuel passed through the combustion chamber without utilization and was consequently wasted. It is the object of the present invention to provide improved apparatus whereby this disadvantage is overcome, the liquid fuel being atomized and mixed with air, and the mixed air and atomized fuel being then passed through a length 15 of absorbent material whereby the liquid fuel which is not absorbed by the air is collected by the absorbent material and is retained thereby until sufficient air passes through the absorbent material to absorb the excess of fuel. In this way the lighter and more volatile hydrocarbons are held in suspension by the air assisted by the partial vacuum resulting from the suction stroke of the engine, 20 while the heavier and less volatile hydrocarbons are caught by the absorbent material and gradually supplied to the air passing through the apparatus. The results are that a more uniformly carburetted air is supplied which may be used advantageously for internal combustion engines, illuminating and other purposes and waste of fuel is avoided. 25 Thus, provision is made of an apparatus whereby a uniform mixture is obtained which is free from excess fuel. It is well known that petrol comprises numerous particles having different degrees of volatility, and when fed to a system of the class described, the lighter and more volatile hydrocarbons will be absorbed by the air introduced at the inlet end and induced to travel through 30 the compartments containing the absorbent material by the vacuum produced by the induction stroke of the engine. As air will only absorb a certain quantity of petrol in the process of forming the mixture and the supply of petrol is greater than the air can absorb, the heavier or less volatile hydrocarbons are caught by the absorbent material in the system and prevented from flowing to 35 the cylinder or engine in liquid form, as the lining is longer than is necessary to absorb the lesser volatile hydrocarbons, the outlet end of the lining remaining dry, that is to say, free from petrol, and consequently the mixture will be uniform and more homogeneous in passing from the chamber, it being obvious that after the heavier hydrocarbons have been absorbed by the lining, the 40 mixture must pass the end of the lining-which is substantially free from hydrocarbon in liquid form. In the drawings:— Figure 1 is an elevation of the apparatus. [Price 6d.] | ||