. Applied thermodynamics for engineers. DIAGRAM FACTOR 201. ACTUAL Fig. 147. Art. 328. — Throttled Suctiou. as in Fig. 148. Excessive obstruc-tion in the suction passages de-creases the capacity of the engine,in a way already suggested in thestudy of air compressors (Art. 224). 329. Diagram Factor. The discussion of Art. 309 to serves to show why thework area of any actual dia-gram must always be less thanthat of the ideal diagram forthe same cylinder, as given inFig. 122. The ratio of thetwo is called the diagram factor. The area of the ideal card would constantly increase ascompressi
. Applied thermodynamics for engineers. DIAGRAM FACTOR 201. ACTUAL Fig. 147. Art. 328. — Throttled Suctiou. as in Fig. 148. Excessive obstruc-tion in the suction passages de-creases the capacity of the engine,in a way already suggested in thestudy of air compressors (Art. 224). 329. Diagram Factor. The discussion of Art. 309 to serves to show why thework area of any actual dia-gram must always be less thanthat of the ideal diagram forthe same cylinder, as given inFig. 122. The ratio of thetwo is called the diagram factor. The area of the ideal card would constantly increase ascompression increased ; that of the actual card soon reaches a limitin this respect; and, consequently, in general, the diagram factordecreases as compression increases. Variations in excellence ofdesign are also responsible for variations of diagram factor.
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