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RPM vs Fuel Consumption

  1. Mar 28, 2012 #1
    Why are usually more wasteful fuel engine at low RPM, as the example image below, 900 RPM more wasteful fuel consumption than 1600 RPM.

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    Last edited: Mar 28, 2012
  2. jcsd
  3. Mar 28, 2012 #2
    Mr Mandala, if I may be corrected, the data shown in the picture upside down with your statement. fuel consumption at 900 rpm is higher than at 1600 rpm. why is that? What kind of analysis?
  4. Mar 28, 2012 #3
    Excuse me sir, I was wrong to write and I have to change it. Can you help me to analyze it?
  5. Mar 28, 2012 #4
    Part of the issue will be the longer time that heat can be lost to the cylinder walls, reducing the amount of energy to expand the air and be converted to mechanical energy.
  6. Mar 28, 2012 #5
    Although the engine was already in the working temperature if the heat will still be lost in the cylinder wall ?
  7. Mar 28, 2012 #6

    jim hardy

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  8. Mar 28, 2012 #7
  9. Mar 29, 2012 #8

    jim hardy

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  10. Mar 29, 2012 #9
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