Diameter and stroke length of the piston of a 4 stroke-4-cylinder diesel engine are 10 cm and 12 cm respectively and speed of crank shaft is 2000 rpm. Calculate brake power. - PrepBharat

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Diameter and stroke length of the piston of a 4 stroke-4-cylinder diesel engine are 10 cm and 12 cm respectively and speed of crank shaft is 2000 rpm. Calculate brake power.

a) 18.90 KW
b) 12.89 KW
c) 12.98 KW
d) 18.98 KW

Answer: d
Explanation: Integrated power = \((\frac{pLAN}{60,000})\)*n/2
= \(\frac{7*105*0.12*\frac{π}{4}*(0.1)2*2000*4}{60000*2}\)
= 43.98 KW
Brake power = Integrated power – Frictional power
= 43.98-25
= 18.98 KW.

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