A New Analysis of the Cylinder Performance of Reciprocating Engines

A New Analysis of the Cylinder Performance of Reciprocating Engines

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ...of leakage is present. Here, the piston alone leaked badly at the commencement of the stroke. The effect of this leak is seen in the upper third of both lines. When only one kind of leakage exists, it is possible to compute with fair accuracy the volume of leakage taking place during expansion or compression. The lines are extended, as shown in Fig. 12&, giving the lines of constant weights of the medium. The volume of gas that had leaked during compression, up to 100 lb. absolute pressure, is then seen to be 0.014 cu. ft., or 6.3 per cent of the volume remaining. The volume of gas, measured at the pressure of 450 lb. absolute, that leaked after combustion during expansion, is seen to be 0.032 cu. ft., or 18.7 per cent of the volume remaining after the leakage stopped. The leakage that took place during combustion at the end of the stroke cannot be computed, but it can be estimated by making the assumption that this leakage was proportional to the mean rate of leakage shown by the two curves, and that its duration was the time interval occurring between the point A and the point B. The important result that is attained by this method is not, however, the approximation of leakage, but the knowledge that it is taking place, so that it can be located and stopped. 83. The Use of the Method in Testing for Maximum Economy.--Many engines are sold and their prices fixed on the basis of their test performances. The importance to the manu facturer of being able to eliminate leaks during this test does not have to be emphasized. The engineer in charge of the test should know whether or not the engine is tight under regular operating conditions. All of our present knowledge of leakage is an inference drawn from the leakage "standing." Nobody...show more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236497325
  • 9781236497321