Two stroke cycle and four-stroke cycle diesel engines are in use in rail traction, with four-stroke cycle design dominating the field. Cycle simulations using computer programs have shown that the conventional two-stroke cycle is somewhat inferior to its four-stroke cycle counterpart in cobustion efficiency and thermal loading. Research at Sulzer concluded that the conventional two-stroke cycle engine is not very suitable for locomotive application. A survey by Ricardos, based on an investigation of engines in current production for traction applicationm, suggested that there are potentials in two-stroke cycle design. This paper presents summary results of a research project concerned with comparison of two well-proven typical locomotive diesel engines, one of two-stroke cycle and the other of four-stroke cycle. Performance, mechanical loading, thermal loading and vibration were chosen as parameters to be investigated to provide information on the status of thetwocyclesin relation to power range, fuel consumption, reliability and durability, with a view to asist the users of locomotive engines to make the correct choice.
Piston motion and thermal loading analyses of two-stroke and four-stroke cycle engines for locomotives
Analyse der Kolbenbewegung und Waermebelastung in Zwei- und Viertaktdieselmotoren fuer Lokomotiven
ASME-Papers ; Jan ; 1-7
1989
7 Seiten, 12 Bilder, 2 Tabellen, 23 Quellen
Conference paper
English
Four- and two-stroke cycle diesel engines for high powered locomotives
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