American Diesel Engine Company

As early as 1901, American diesels went into production, being first built in one and three-cylinder sizes. While European builders preferred an open A-frame design, American engineers featured a totally enclosed, box-frame engine. An air injection fuel system was used, requiring about 650 psi for the proper atomization of the fuel. The engine had a compression of about 460 psi, thus bringing the air temperature to about 1100 F. This single-cylinder model used a 16 x 24-inch bore and stroke, developing 75 horsepower at 164 RPM. Engine weight was 43,000 pounds. Overall it was approximately 10 feet wide and stood 12 feet high.

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The American diesel engine line of 1903 also included this triple-cylinder engine of 120 horsepower. Featuring a 12 x 18-inch bore and stroke, it operated at 220 RPM. Within a short time other sizes were added, including the three-cylinder 170 and 225 horsepower models. These engines carried a bore and stroke of 14 x 21 and 16 x 24 inches respectively. The 225 horsepower size weighed over 78 tons. Manhattan Transit Company of New Work acquired sales rights for New York State, with American selling the engine at all other points.

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