Experimental Study on ATAC (Active Thermo-Atmosphere Combustion) in a Two-Stroke Gasoline Engine

Abstract
The paper deals with experimental activity concerning ATAC, which, in two-stroke gasoline engines, helps solving the crucial problem of combustion instability at light loads. ATAC consists of employing the energy of residual gas to prime an efficient combustion.The research is aimed to give further insight into ATAC mechanism both by visualisation of the combustion process and by examination of the influence which relevant parameters like air-fuel ratio, engine speed, compression ratio, scavenging passage design have on ATAC operation.Several results have been acquired and collected hitherto. A part of them are shown and discussed in this paper.

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