![]() It was determined that efficiencies were between 95 and 100%. This report presents the results of tests on two-stroke-cycle Diesel engines to determine the efficiency of the crank case scavenging pump. The best results were obtained under conditions differing from the usual ones.Ĭrank case scavenging of two-stroke-cycle engines Effect of systematic variation of the height of the scavenge and exhaust ports on the scavenging, as determined by gas analysis. Lastly, attention is called to the fundamental defect of the two-dimensional treatment of the scavenging process and to the consequent distinction between the two-dimensional and three-dimensional scavenging-type efficiency.Ĭrank case scavenging of a two-stroke-cycle engineĮxperiments with a two-stroke-cycle, crank case scavenging engine. These results lead to several conclusions regarding the propulsion of motor vehicles by the two-stroke-cycle engines. It is further shown that the power increase is limited by the scavenging process, so that further researches are desirable for qualitative improvement. The viewpoints are discussed, according to which the scavenging of two-stroke-cycle engines can be evaluated, and the relations between scavenging pressure and the quantity of the scavenging medium required, as also between the scavenging pressure and the revolution speed, are developed. ![]() Evaluation of scavenging in two-stroke-cycle engines
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