ADJUSTMENT AND OPERATION
13-12
3.4.2 Calculation of corrected power
Multiply the measured brake power or torque by the
calculated diesel engine correction factor to obtain a
corrected value.
If the applicable range of the correction formula is
exceeded, indicate the corrected values and record the test
conditions on the test record.
Colculation output = Correction factor
ǩc
Measured brake power
Atmospheric conditions during test
Temperature(T ):-q%=q(?҇T҇-q%=q(?
Dry atmospheric pressure(P
d
):M2COO*I҇P
d
҇M2COO*I
ǩc
=(
f
a)
f
m
ޓ
f
a:Atmospheric factorޓ
f
m
Engine factor
Range of correction equation use
ޓ6JGTCPIGQHEQTTGEVKQPHCEVQT
ǩc
KUCUHQNNQYU
0.9҇
ǩc
҇1.1.
Natural aspiration engine and engine with
mechanically driven air charger
Turbocharged engine without air cooler
or with air-to-air cooler
Turbocharged engine with air-to-liquid
cooler
f
a 㨯
99
P
d
T
298
f
a
㨯
99
P
d
T
298
f
a
㨯
99
P
d
T
298
Calculation of correction factor(
f
a
)
Calculation of engine factor
f
m
f
m
0.036q
c
㧙1.14
q
c
%QTTGEVGFHWGNUWRRN[XQNWOG
q
c
q
r
q =
z(WGNHNQYTCVGg/s
5VTQMGXQNWOGl'PIKPGURGGFmin
-1
z=1200004E[ENGGPIKPG
r4CVKQDGVYGGPRTGUUWTGCVVWTDQEJCTIGTQT
CKTEQQNGTQWVNGVCPFCVOQURJGTKERTGUUWTG
ޓr=1HQTPCVWTCNCURKTCVKQPGPIKPG
Applicable range of engine factor
f
m
ޓ37.2҇q
c
҇65mglE[ENG
㨯q
c
҇37.2mglE[ENG㧦
f
m
EQPUVCPV
㨯65mglE[ENG҇q
c
㧦
f
m
EQPUVCPV