A Text-Book on the Gas, Oil, and Air Engines

A Text-Book on the Gas, Oil, and Air 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. 1896 edition. Excerpt: ...composition in the lighting port, at the end furthest from the piston, was much richer than in front of the compression space. With a strong mixture, Teichmann found that the charge contained 16-2 per cent, of rich gas in the igniting port, 13-3 per cent, in the centre of the compression space, and 9-1 per cent, close to the piston. The theory that stratification of the charge, which these experiments were undertaken to prove, caused the effects of after combustion has now been abandoned. Professor Schottler and other scientific observers have pointed out that smoke cannot be considered as fairly representing the gaseous charge in the cylinder of an engine. Nor does it always remain at the back of the cylinder; in experiments undertaken by him on a Koerting engine, the whole cylinder was filled with a cloud of smoke. That ignition at the side proves stratification of the charge has also been disputed. It shows that the mixture is richer in some parts than in others, which might naturally be inferred under any conditions, but not that the gas remains in layers after introduction, although such a disposition is imparted to it at first. In experiments made on a Benz engine, under the same working conditions as the Otto, this partial stratification was not found to exist, and the charge was ignited with equal certainty at various parts of the cylinder. The latest authorities on the subject maintain that stratification cannot be preserved, even if the gases enter the cylinder in successive layers of richness, because of the compressive and mixing power exerted by the back stroke of the piston. It is impossible, they say, to conceive that the charge can adhere to the original order of its admission, when the rapidity with which the piston compresses it...
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Product details

  • Paperback | 208 pages
  • 189 x 246 x 11mm | 381g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123662632X
  • 9781236626325