Diesel motor, Diesel engine, Diesel n. A type of internal-combustion engine in which the air drawn in by the suction stroke is so highly compressed that the heat generated ignites the fuel (usually a heavy oil), the fuel being automatically sprayed into the cylinder under pressure. The Diesel engine has a very high thermal efficiency.
... Germans was of the type designed by Simon Lake, an American. The Germans bought two submarines built by Mr. Lake at Kronstadt for the Russians during the Russian-Japanese war. Various improvements upon the Diesel engine and special training for submarine crews enabled the German navy to strike terrible blows during the early part of ... — History of the World War - An Authentic Narrative of the World's Greatest War • Francis A. March and Richard J. Beamish
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