Split-single engine
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car from 1908 to 1915. The first picture shows the moment of firing. The split-single engine (British English; twingle engine in U.S. English) is a type of two-stroke internal combustion engine where two cylinders share a single combustion chamber. The first production split-single engine was built in 1908, and various designs were used on several motorcycles and cars until the mid-1950s, with Puch continuing with their version until 1970.
car from 1908 to 1915. The first picture shows the moment of firing.]] The split-single engine (British English; twingle engine in U.S. English) is a type of two-stroke internal combustion engine where two cylinders share a single combustion chamber. The first production split-single engine was built in 1908, and various designs were used on several motorcycles and cars until the mid-1950s, with Puch continuing with their version until 1970. ==Operating princple== The split-single uses a two-stroke cycle (i.e. where every downward stroke produces power) with the following phases: Pistons travel upwards, compressing the fuel-air mixture in both cylinders. A spark plug ignites the mixture (in the right side cylinder in the animation) when the pistons are near the top of the cylinders. Pressure from the ignited air-fuel mixture pushes both pistons downwards. Near the bottom of the travel, an exhaust port becomes exposed (at the rear of the left side cylinder in the animation), causing the exhaust gases to exit both cylinders. (This video (referenced below) explains and demonstrates some of the other types of split single, as well as the one in the animation.) At the same time, the intake port is exposed on the other cylinder, causing a fresh air-fuel mixture (which has been compressed in the crankcase by the downward movement of the pistons) to be drawn into the cylinder for the next cycle. ==See also== Opposed-piston engine List of motorcycles by type of engine Scuderi engine ==References==
Text derived from https://en.wikipedia.org/w/index.php?oldid=1378930607 under CC BY-SA 4.0; modifications have been made.