1922-01-01

MANIFOLD VAPORIZATION AND EXHAUST-GAS TEMPERATURES 1 220006

Stating that present internal-combustion engine fuel is too low in volatility for economical use and that this is the cause of engine-maintenance troubles, the authors believe that, since it is not possible to obtain the more volatile grades in sufficient quantity, the only hope of remedying this condition is to learn how to use the heavy fuel, and that the most promising method of doing this lies in the effective use of heat.
As the experimental data regarding the best temperature at which to maintain the metal in a hot-spot manifold and the range of temperatures available in the exhaust gases are meager, the authors experimented in the Purdue University laboratory to secure additional data. They present a summary of the results. They feel that the exhaust-gas temperatures are high enough so that properly designed manifolds, together with thermostatically controlled carbureter temperatures, should make possible the satisfactory carburetion of fuels considerably heavier than the present “power” gasoline, without seriously limiting the power, efficiency or flexibility of passenger-car engines or causing any engine-maintenance troubles.

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