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).
Patent specification for improvements to induction systems of internal combustion engines.
| Identifier | ExFiles\Box 148\1\ scan0134 | |
| Date | 26th July 1935 | |
| PATENT SPECIFICATION Application Date: July 26, 1935. No. 21327/35. 460,377 Complete Specification Left: July 8, 1936. Complete Specification Accepted: Jan. 26, 1937. PROVISIONAL SPECIFICATION Improvements in and relating to Induction Systems of Internal Combustion Engines I, THOMAS JAMES SWINNEY, a British subject, of St.{Capt. P. R. Strong} Leonard's House, Sheen Lane, London, S.W.14, do hereby declare 5 the nature of this invention to be as follows:— This invention relates to induction systems of internal combustion engines. The expression “ induction systems ” 10 as used herein includes, broadly, that portion of an internal combustion engine installation by which a mixture of fuel and air is supplied to the cylinders of the engine and thus includes what are known as carburettors. 15 The object of the invention generally stated is to provide improvements in the induction system of internal combustion engines, as above defined, and in particular in the direction of securing that, at 20 varying speeds of running or in the operating conditions of the engine, fuel and air is delivered to the engine cylinders in appropriate relative proportions. 25 The general practice in connection with the arrangement of the induction systems of internal combustion engines operating on relatively volatile fuels is to employ a carburettor having a main passage 30 through which a mixture of fuel and air will travel into the cylinders during normal running and to provide a by-pass jet usually called the slow running jet by which a relatively rich mixture is supplied 35 to the passage leading from the carburettor to the engine cylinders and in advance or engine side of the throttle located in the passage. It has, however, been proposed in con- 40 nection with induction systems of internal combustion engines to employ two carburettors each connected with an induction pipe furnished with a throttle, the two throttles being interconnected in such 45 manner that the idle running air inlet of the main carburettor is controlled in dependence on the operation of the auxiliary carburettor. Above, reference has been made to car- 50 burettors which may be regarded as being devices for securing the vaporisation, subdivision or dispersion in air of a stream of relatively volatile fuel. [Price 1/-] The invention is, however, not restricted to arrangements designed to be employed with relatively volatile fuel and 55 it extends to arrangements primarily for use with fuels of lower volatility than what is known as petrol, and includes arrangements for the supply of fuel to 60 Diesel or other heavy oil engines. The invention consists, broadly, in an induction system in which there are provided two passages for the supply of air or air and fuel to the engine and in which 65 movable valve elements controlling the flow in such passages are arranged to be rotated about the same or a common axis. Preferably, in accordance with the invention, the two passages are arranged co- 70 axially. Conveniently adjacent to the position where the movable valve elements control the flow of fuel through the outer passage, the form thereof is such that when the 75 valves associated with the passages are in the open position, flow throughout substantially the whole of the space between the inner and the outer passage is secured. 80 Thus, in accordance with the invention, the inner and outer passages may be constituted by concentrically arranged tubes the inner of which is furnished externally 85 with a spherical enlargement and on the diameter of the enlargement at right angles to the common axis of the two passages there is rotatably arranged an annulus constituting the throttle for the 90 outer passage while, on the same diameter, the means for regulating the flow through the inner passage is arranged. For instance, with such a construction, through the walls of the outer and inner 95 passage and diametrically through the enlargement on the external surfaces of the inner passage there may be arranged to extend a spindle on which is mounted the annular member forming the throttle 100 for the outer passage and the member functioning as a throttle for the inner passage. The relative positions of the throttles with respect to the closing of the passages may be varied in accordance with the par- | ||