열역학 시험 족보

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1) P-V diagram
a. draw a P-V diagram
(X-axis : volume on a log scale, Y-axis : pressure on a log scale).

b. Mark each stroke on your P-V diagram
4 stroke engine consists of four seperated strokes. [intake, exhaust, compression, power]

c. Show the area of pumping loss on your P-V diagram
The graph shows that there are two areas in total. In this case, the area of the lower portion is due to the pumping loss.

d. What is the main reason that conventional gasoline engines have a throttle valve and pumping loss?

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