A high-speed diesel engine operating at 2000 rev/min has a single cylinder. During the compression stroke, the fuel injection starts 20° before TDC and ends at TDC. Determine the duration the fuel injection takes place. - PrepBharat

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A high-speed diesel engine operating at 2000 rev/min has a single cylinder. During the compression stroke, the fuel injection starts 20° before TDC and ends at TDC. Determine the duration the fuel injection takes place.

a) 1/600 seconds
b) 2/248 seconds
c) 1/60 seconds
d) 2/319 seconds

Answer: a
Explanation: Revolution/sec = 2000/3 = 100/3
Crankshaft angle/sec = \(\frac{100}{3}*\frac{360}{1}\)
Injection time for 20° rotation = 1*\(\frac{20}{12000}\)
= 1/600 seconds.

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