Relation between Scavenging Flow and Its Efficiency of a Two-Stroke Cycle Engine
Takeshi Oka,Soichi Ishihara +1 more
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In this article, the authors investigated the relation between scavenging flow of a two-stroke cycle engine and its efficiency, and concluded that scavenging efficiency varies continuously with delivery ratio, vortex motion of scavenging does not appear within the delivery ratios of engines which are in practical use.Abstract:
There has been few investigations of the relation between scavenging flow of a two-stroke cycle engine and its efficiency. To investigate the relation, the process in which the water in a transparent cylinder was scavenged by injection of a colored salt solution was photographed. By measuring the specific gravity of contents in the cylinder after scavenging, scavenging efficiency was calculated, and the results were compared with theoretical scavenging characteristic curves. These experiments were carried out on a two-dimensional scavenging flow in a model with a fixed piston and on a three-dimensional scavenging flow in a model with a movable piston. It is concluded that, (1) scavenging efficiency varies continuously with delivery ratio, (2) vortex motion of scavenging does not appear within the delivery ratios of engines which are in practical use, and (3) the deterioration of scavenging efficiency is caused mainly by the pure short-circuiting loss.read more
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Journal ArticleDOI
Scavenging the two-stroke engine
TL;DR: In this paper, the authors reviewed and assessed experimental and theoretical methods, which have been applied during the past three decades, to evaluate the success of the scavenging process of a two-stroke-cycle engine.
Dissertation
Modelling the scavenging process in a two-stroke i.c. engine
TL;DR: In this paper, a two-stroke engine simulation model has been developed to predict the steady state performance characteristics of a crankcase compressed, piston port-timed, and two stroke engine equipped with expansion chamber.
References
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Das Laboratorium für Verbrennungskraftmaschinen der Technischen Hochschule Stuttgart und seine Einrichtungen . Untersuchungen über die Spülung von Zweitaktmotoren . Staugerät zur Messung von Geschwindigkeitskomponnenten in Stömungen . Untersuchungen über Verbrennungserscheinungen bei Dieselmaschinen
Otto Lutz,W. Maier +1 more