Two-stroke diesel engine

A two-stroke diesel engine is a diesel engine that uses compression ignition in a two-stroke combustion cycle. It was invented by Hugo Güldner in 1899. In compression ignition, air is first compressed and heated; fuel is then injected into the cylinder, causing it to self-ignite. This delivers a power stroke each time the piston rises and falls, without any need for the additional exhaust and induction strokes of the four-stroke cycle. According to the engineer who drew up Rudolf Diesel‘s design for of the first operational diesel engine, Motor 250/400, Imanuel Lauster, Diesel did not originally intend using the two-stroke principle for the diesel engine. Hugo Güldner designed what is believed to be the first operational two-stroke diesel engine in 1899, and he convinced MAN, Krupp and Diesel to fund building this engine with M 10,000 each. Güldner's engine had a 175 mm work cylinder, and a 185 mm scavenging cylinder; both had a stroke of 210 mm. The indicated power output was . In February 1900, this engine ran under its own power for the first time. However, with its actual power output of only and high fuel consumption of 380 g·PS−1·h−1 (517 g·kW−1·h−1), it did not prove to be successful; Güldner's two-stroke diesel engine project was abandoned in 1901. In 1908, MAN Nürnberg offered single-acting piston two-stroke diesel engines for marine use, the first engine from MAN Nürnberg was made in 1912 for an electric power plant. In collaboration with Blohm + Voss in Hamburg, MAN Nürnberg built the first double-acting piston two-stroke engine for marine use in 1913/1914. Paul Henry Schweitzer argues that the opposed piston two-stroke diesel engine was originally invented by Hugo Junkers. During World War I, MAN Nürnberg built a six-cylinder, double-acting piston, two-stroke diesel engine with a rated power of . MAN moved their two-stroke diesel engine department from Nürnberg to Augsburg in 1919. By 1939, several two-stroke diesel types were in widespread use, and others were being developed for high-power applications,.

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Detroit Diesel Corporation (DDC) is an American diesel engine manufacturer headquartered in Detroit, Michigan. It is a subsidiary of Daimler Truck North America, which is itself a wholly owned subsidiary of the multinational Daimler Truck AG. The company manufactures heavy-duty engines and chassis components for the on-highway and vocational commercial truck markets. Detroit Diesel has built more than 5 million engines since 1938, more than 1 million of which are still in operation worldwide.

Two-stroke diesel engine

Napier Deltic

The Napier Deltic engine is a British opposed-piston valveless, supercharged uniflow scavenged, two-stroke diesel engine used in marine and locomotive applications, designed and produced by D. Napier & Son. Unusually, the cylinders were disposed in a three-bank triangle, with a crankshaft at each corner of the triangle. The term Deltic (meaning "in the form of the Greek letter (capital) delta") is used to refer to both the Deltic E.