Motor Vehicle Engineering; Engines (for Automobiles, Trucks, and Tractors)

Motor Vehicle Engineering; Engines (for Automobiles, Trucks, and Tractors)

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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. 1920 edition. Excerpt: ...the top half of the case. While some portions of the crankcase could be very thin, the foundry experiences difficulties when pouring a case having walls thinner than '2 'nch thick; this therefore should be the minimum thickness for even the smallest crankcases. The largest cases are only made about % inch thick, and for engines having a bore of from 3 inches to 4% inches, the average thickness used is %6 inch. The thickness of the metal upon which the cylinders are resting is made considerably heavier; a simple rule is to make it + M, or slightly less if the top is well ribbed between the cylinders, as seen at r, Figures 98c and 98e. The flanges by which the two halves of the crankcase are bolted together are made from 1% to 2 times the thickness of the crankcase metal, the first being used for small engines, and the latter for engines having a bore of 3) inches or more. The two halves are joined by means of bolts from to % inch in thickness, depending on the size of the engine and the spacing of the bolts. Bolts are spaced from three inches to five inches apart. Usually, when the bolts are close together, no lugs are provided on the flanges for the bolts; if the spacing is more than 4 inches lugs are provided, about i to % inch thicker than the flanges, and they are spot faced where the bolt heads or nuts are resting on them. To make the joints between the flanges oil tight a suitable gasket must be used, and this is made of velumoid, brown paper, or thin cork, and they are preferably shellacked on one side when assembling. Thin felt is not recommended as the oil will ooze through, rendering the exterior sticky and dirty. Automobile engines are as a rule held in place by three or four supports or supporting arms. When three supports more

Product details

  • Paperback | 84 pages
  • 189 x 246 x 4mm | 168g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123652599X
  • 9781236525994