Stelzer engine

The Stelzer engine is a two-stroke opposing-piston design proposed by Frank Stelzer. It uses conjoined pistons 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:

Prototypes

A prototype engine was demonstrated in Frankfurt in 1983 and Opel 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. ^[1] A prototype car with a Stelzer engine and electric transmission was shown at a German motor show in 1983.^[2]

References

External links

U.S. Patent 4,385,597 -- Two-Stroke Internal Combustion Engine 1983
Diagrams of Stelzer engine and linear alternator

Reciprocating engines and configurations

Type

Stroke cycles

Configurations
& number of cylinders

Single cylinder	Single

Two cylinders	Split-single I2 V2 F2

Inline / straight	I2 I3 I4 I5 I6 I7 I8 I9 I10 I12 I14

Flat	F2 F4 F6 F8 F10 F12 F16

V / Vee	V2 V3 V4 V5 V6 V8 V10 V12 V14 V16 V18 V20 V24

W	W8 W12 W16 W18

Other inline	H U Square four VR Opposed X Junkers Jumo 222

Components

Valves	Cylinder head porting Corliss Intake Exhaust Multi Overhead Piston Poppet Side Sleeve Slide Rotary valve Variable valve timing Camless Desmodromic

Fuel supplies	Carburetor Gasoline direct injection Common rail

Mechanisms	Cam Camshaft Overhead camshaft Connecting rod Crank Crankshaft Scotch yoke Swashplate Rhombic drive

Linkages	Peaucellier–Lipkin Watt's (parallel)

Other	Hemi Recuperator Turbo-compounding

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