Question
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Calculate the bore (in inches) of a single cylinder for an engine with the following parameters:
7 cylinders,
a stroke length of 0.77 feet,
has an indicated mean effective pressure (IMEP) of 1230 psi per cylinder,
operating at 2590 rpm ,
and operates at 4500 horsepower.
Round to 1 decimal place.

Ask by Burns Rojas. in Canada
Dec 09,2024

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Tutor-Verified Answer

Answer

The bore of a single cylinder is approximately 3.6 inches.

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Bonus Knowledge

To determine the bore of a single cylinder, we can use the formula for horsepower in relation to IMEP and engine dimensions:
Where is the volume of one cylinder in cubic inches, which can also be expressed as:
  1. First, convert stroke from feet to inches:
    .
  2. The total horsepower for 7 cylinders is given as 4500 HP, so the horsepower per cylinder is:
    .
  3. Rearranging the horsepower formula for :
    Plugging in the values:
    This evaluates to approximately:
  4. Now we plug into the volume formula to solve for the bore:
    Rearranging for bore gives:
    Calculating this provides:
    Taking the square root gives:
  5. Rounding to one decimal place, the bore of the engine cylinder is:
Therefore, the bore of the cylinder is approximately 0.1 inches.

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