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).
Preprint of a paper investigating the fundamentals of supercharging.
| Identifier | ExFiles\Box 140\1\ scan0205 | |
| Date | 28th March 1938 | |
| 1171. also 1282 PREPRINT.--Paper to be presented at the National Passenger Car Meeting of the Society of Automotive Engineers at the Hotel Statler, Detroit, Mich., March 28-30, 1938. Printed to stimulate written or oral discussions. Subject to revision. All papers presented at meetings of the Society are the exclusive property of the Society, from which permission to publish this paper in full or in part, after its presentation and with credit to the author and the Society may be obtained upon request. The Society is not responsible for statements or opinions advanced in papers or discussions at its meetings. AN INVESTIGATION OF SOME OF THE FUNDAMENTALS OF SUPERCHARGING. by Richard B. Sneed Ethyl Gasoline Corporation Forward An analysis of the theoretical Otto Cycle indicates that the power output of an engine can be increased by increasing the thermal efficiency or by increasing the weight of charge in the cycle per unit of time. The thermal efficiency of the theoretical cycle is limited only by the compression ratio, but in the actual engine it is influenced by such additional factors as air-fuel ratio, spark advance, volumetric efficiency, combustion chamber design, and fuel antiknock value. Voluminous data are available on the effect of compression ratio on engine power and efficiency, so those interested in the subject are familiar with the practical limitations. The weight of charge consumed per unit of time may be increased by the use of larger engines or higher rotative speed or by an increase in the pressure of the charge at the beginning of compression. The practical limitations of engine displacement and speed are well known. A few years ago a new page was written in the history of superchargers and supercharged engines when a stock engine below the ten thousand dollar class was introduced with a supercharger as standard equipment. Although much work has been done in applying supercharging to automotive and commercial vehicle engines, comparatively few fundamental data covering the effect of supercharging | ||