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MANIFOLD DEVELOPMENT ELIMINATES CRANKCASE DILUTION
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English
Abstract
About 1917 the heavy ends of the fuel sold as gasoline required such an amount of heat to vaporize them that the expression “crankcase dilution” appeared; now they have increased to a maximum boiling-point of 446 deg. fahr., which has made it necessary to go still farther in the direction of heat application.
After a brief consideration of the relative heat-absorption of air and fuel and the time factor in its relation to vaporizing, the author describes experiments with a specially designed manifold for increased vaporization efficiency and presents photographs of the device.
With this type of manifold it has been possible to eliminate crankcase oil dilution completely and effect a reduction in carbonization. The lubrication efficiency has been improved, as well as other features that are enumerated.