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).
Proposed carburetter design, comparing it to other models and listing its five key advantages.
| Identifier | ExFiles\Box 39\2\ Scan248 | |
| Date | 24th January 1919 | |
| R.B. 235a (500T) (S.D. 408. 26-4-17.) Bm. 2/156/13. Contd. -2- EH6/LG24.1.19. By this means it ought to be possible to keep the petrol to air ratio correct for all speeds. One might say that in effect this carburetter would work similar to the "Polyrhoe" except that it would have the great advantage of working in a vertical position, and also having a diffuser jet. The actual restriction jet we anticipate would be submerged similar to what we use on the R.R.C.H. carburetter. Of course there are a lot of points to be gone into. Attached herewith is a sketch shewing the idea we have in mind. In this case we have applied it to the present stand-ard car carburetter. Most of the parts have been traced off the car carburetter. It could also be made in the form of a straight-through carburetter. In this case one would not use a separate air valve but would use the emulsion tube itself as the air valve and the guide for it would be provided for in the diffuser jet. We suggest that a carburetter of this type would have the following advantages:- 1. It is automatic in action and the amount of petrol increases proportionately to the amount of air. 2. It has all the advantages of the Claudel diffuser for atomisation throughout the whole range of action. 3. The whole of the air passing into the engine passes the jet and mixes with the petrol. 4. Infinite adjustment in size of throat for low speed running. 5. The position of the emulsion would be automatically adjusted so that there is the maximum velocity of air passing them. Contd. | ||