Sae Transactions Volume 8, PT. 1

Sae Transactions Volume 8, PT. 1

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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. 1913 edition. Excerpt: ... which affects the mixture somewhat. The difference in temperature inside the bonnet under different conditions affects the carburetion very much more than is generally understood. Carburetion is affected to the extent of about 15 per cent., as near as I can make out, by 1oo Fahrenheit variation. Those variations of 1oo occur quite often. I ran with a thermometer in the radiator cap and got the temperature of the circulating water. If the circulating water is say 120 to 130 running on a level and you start to climb a steep hill, the circulating water will climb up to 160, 180 or even 200, and the exhaust gas analysis will change very materially without any adjustment of the carbureter at all. It will immediately become very much richer. It is leaner when it is cold and richer when it is hot, and varies materially. That is, if one were to give any opinion, the motor heats up when it climbs a hill, the temperature rises in the bonnet, the mixture becomes richer and you get a little more power. The approximate efficiency I found is something of this kind: 13.5% CO; 0.4% CO; 0.2% O; that approximately would give you about the greatest efficiency on the brake and on the road. You want a trace of CO; I will explain why that is so. You want a trace of free oxygen. You will evidently get in running on the road both free oxygen and CO, provided the CO does not exceed y2 per cent. Under road conditions I frequently had as much as 1y2 and 2 per cent. CO and as much as 2 per cent, or 4 per cent, of free oxygen at the same time. Naturally I thought my apparatus was wrong and devoted a good deal of time to finding out where the trouble was. I spent the whole season fooling with that and could not discover where the trouble was. The next season, when I got...
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Product details

  • Paperback | 138 pages
  • 189 x 246 x 8mm | 259g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236532724
  • 9781236532725