Abstract
Although exhaust gas ejectors have been little utilized in engines, their application is worthy of consideration because of their basic simplicity. An application for engine cooling has been investigated using a four-stroke cycle Diesel engine and an air model. Following results are obtained : (1) The cooling air for an engine may be supplied only from the ejector which is well designed. Fuel consumption can be decreased by using the ejector together with a fan for engine cooling. (2) Flow rate of air induced into the ejector becomes larger with an increase in engine load. However, flow rate per unit horse power becomes smaller. (3) Flow rate of secondary fluid for the ejector, whose driving fluid is intermittently supplied, is much larger than that for the ejector of steady state, because the inertia effect of fluid in the ejector is a useful factor to draw the secondary fluid.
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