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).
Summary of tests on the effect of alcohol and benzole additions on fuel consumption in different engines.
| Identifier | ExFiles\Box 27a\4\ Scan297 | |
| Date | 1st March 1934 | |
| This may interest you perhaps to read By Rm{William Robotham - Chief Engineer} (circled) File (circled) X1282 I.A.E. RESEARCH AND STANDARDISATION COMMITTEE Research Department, 5, Bolton Road, Chiswick, W.4. No.7050. Class 111, 121. March, 1934. '' The Effect of Alcohol and Benzole Additions on Fuel Consumption --------------------------- Wawrzniniok, Aut. Zeit., Jan. 10 & 25, Feb. 10, 1934, pp. 21, 47, 74. --------------------------- The Institut für Kraftfahrwesen, Dresden, has carried out tests to determine the mean specific fuel consumption on three different engines when running on petrol-alcohol, petrol-benzole and petrol-benzole-alcohol mixtures, as compared with pure petrol. On a Daimler lorry engine, fuel consumption, when operating on a petrol-alcohol mixture, remained constant up to 15% alcohol and then increased slightly with further increase in alcohol content. This increase, however, was offset by a higher engine output especially at low speeds, and a reduced tendency to knock. Also, the ignition advance at constant speed could be increased with increasing alcohol content. Benzole additions to petrol decreased the fuel consumption even with the richest (50:50) mixtures, although much more benzole than alcohol was required to give the same resistance to knocking. With petrol-benzole-alcohol mixtures, fuel consumption was slightly higher than with petrol-benzole mixtures, but not as high as with pure petrol. On a high-speed Mercedes-Benz passenger car engine, fuel consumption increased slightly with alcohol additions up to 20%, but decreased with additions exceeding that amount. With petrol-benzole-alcohol mixtures, alcohol slightly increased the fuel consumption compared with petrol-benzole mixtures and the output was higher, especially at high speeds, than when running on pure petrol. On a low-speed Büssing bus engine, alcohol even up to 50% decreased the fuel consumption considerably. The greatest increase in output was obtained with petrol-alcohol mixtures containing 20 - 30% alcohol, and at high speeds. | ||