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The Stelzer engine is a two-stroke opposing-piston free-piston engine design proposed by Frank Stelzer. It uses conjoined
Popular Mechanics, March 1984
/ref>
Diagrams of Stelzer engine and linear alternator
Proposed engines Free-piston engines {{Mech-engineering-stub
The Stelzer engine is a two-stroke opposing-piston free-piston engine design proposed by Frank Stelzer. It uses conjoined piston
A piston is a component of reciprocating engines, reciprocating pumps, gas compressors, hydraulic cylinders and pneumatic cylinders, among other similar mechanisms. It is the moving component that is contained by a cylinder (engine), cylinder a ...
s in a push-pull arrangement which allows for fewer moving parts and simplified manufacturing. An engine of the same design appeared on the cover of the February 1969 issue of Mechanix Illustrated magazine.
Operation
There are two combustion chambers and a central precompression chamber. Control of the air flow between the precompression chamber and the combustion chambers is made by stepped piston rods.Applications
Applications envisaged for the engine include driving: * An air compressor * A hydraulic pump * A linear generatorPrototypes
A prototype engine was demonstrated inFrankfurt
Frankfurt am Main () is the most populous city in the States of Germany, German state of Hesse. Its 773,068 inhabitants as of 2022 make it the List of cities in Germany by population, fifth-most populous city in Germany. Located in the forela ...
in 1983 and Opel
Opel Automobile GmbH (), usually shortened to Opel, is a German automobile manufacturer which has been a subsidiary of Stellantis since 16 January 2021. It was owned by the American automaker General Motors from 1929 until 2017 and the PSA Gr ...
was reported to be interested in it. In 1982, the Government of Ireland agreed to pay half the cost of a factory at Shannon Airport to manufacture the engines. A prototype car with a Stelzer engine and electric transmission was shown at a German motor show in 1983./ref>
See also
* Linear alternatorReferences
External links
* -- ''Two-Stroke Internal Combustion Engine 1983''Diagrams of Stelzer engine and linear alternator
Proposed engines Free-piston engines {{Mech-engineering-stub