PISTON ENGINES WITH CYLINDER AXIS PARALLEL TO DRIVE SHAFT AXIS – CLASSIFICATION AND REVIEW
P.Mazuro, T.Rychter, A.Teodorczyk
Politechnika Warszawska, Instytut Techniki Cieplnej
ul. Nowowiejska 21/25, 00-000 Warszawa
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The conventional crankshaft piston engines dominate in the automotive industry. Automotive development centers seek for innovations in the engine efficiency, ecology, fuel and air supply, control or economics but the research area mostly refers to conventional constructions.
The authors propose to come back to old and forgotten constructions called barrel engines which originate from the period between First and Second World Wars. The design and properties of barrel engines differ a lot from conventional crankshaft engines. The most characteristic feature of barrel engines is that the cylinder axis is parallel to drive shaft axis and due to multiple cylinders they have axial symmetry. Although there are not many historical applications and production experience of barrel engines, the authors believe they may offer a few really significant advantages to contemporary automotive business.
The paper presents unique classification of barrel engines specific mechanisms to convert reciprocating motion of the piston to the rotary motion of the crank shaft. The examples of historical applications of each group of mechanisms are given with comments to their mode of action.
Keywords: barrel engines, cylinder axis parallel to drive shaft axis, multiple cylinders, axial symmetry.