Question:-
A turbo-charged four-stroke direct injection diesel engine has a displacement volume of 0.0259m3 (25.9litres). The engine has an output of 950kW at 2200rpm. The mean effective pressure in MPa is closest to
Option (A)
2
Option (B)
1
Option(C)
0.2
Option(D)
0.1
Correct Option:
(A)
Question Solution:
B.P. = (npm.e.p.vs.N.K / 60) = 950KW

Where n=no. of cylinders = 1

Pm.e.p=Mean effective pressure

Vs=displacement volume = 0.0259m3


N=r.p.m = 2200 r.p.m


K= 1/2 for 4-stroke, = 1 for 2-stroke


\ pm.e.p. = {(950x60)/(0.0257x2200x1/2)} = 2000Kpa = 2Mpa
question-answer-faq-2349