ADJUSTMENT AND OPERATION
13-11
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
ǩ
c
Measured brake power
Atmospheric conditions during test
Temperature(
T
):
-q
%=q
(?҇
T
҇-q
%=q
(?
Dry atmospheric pressure(
P
d
):
M2COO*I҇
P
d
҇M2COO*I
ǩ
c
=(
f
a )
f
m
ޓ
f
a :
Atmospheric factor
ޓ
f
m
Engine factor
Range of correction equation use
ޓ6JGTCPIGQHEQTTGEVKQPHCEVQT
ǩ
c
KUCUHQNNQYU
0.9
҇
ǩ
c
҇
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
0.036
q
c
㧙
1.14
q
c
%QTTGEVGFHWGNUWRRN[XQNWOG
q
c
q
r
q =
z
(WGNHNQYTCVG
g/s
5VTQMGXQNWOG
l
'PIKPGURGGF
min
-1
z=
120000
4
E[ENGGPIKPG
r
4CVKQDGVYGGPRTGUUWTGCVVWTDQEJCTIGTQT
CKTEQQNGTQWVNGVCPFCVOQURJGTKERTGUUWTG
ޓ
r=
1
HQTPCVWTCNCURKTCVKQPGPIKPG
Applicable range of engine factor
f
m
ޓ
37.2
҇
q
c
҇
65mg
l
E[ENG
㨯
q
c
҇
37.2mg
l
E[ENG㧦
f
m
EQPUVCPV
㨯
65mg
l
E[ENG҇
q
c
㧦
f
m
EQPUVCPV
