Hyundai HDF 50-7S, Service Manual

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ADJUSTMENT AND OPERATION
13-10
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( ) × Measured brake power
Atmospheric conditions during test
Temperature( ):283K(10°C)[50°F] T 313K(40°C )[104°F]
Dry atmospheric pressure( ):80kPa(600mmHg) 110kPa(825mmHg)
=( ) :Atmospheric factor :Engine factor
Range of correction equation use
The range of correction factor( )is as follows:
0.9
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
=( )·( )
0.7
=( )
0.7
·( )
1.2
298
=( )
0.7
·( )
0.7
99
298
Calculation of correction factor( )
Calculation of engine factor( )
=0.036 -1.14
:Corrected fuel supply volume
=
=
( ) × (Fuel flow rate g/s)
(Stroke volume ) × (Engine speed min
-1
)
99
99
298
= 120000(4-cycle engine)
:Ratio between pressure at turbocharger or
air cooler outlet and atmospheric pressure
( =1 for natural aspiration engine)
· Applicable range of engine factor( )
37.2 65mg/( -cycle)
· 37.2mg/(l -cycle): =0.2(constant)
· 65mg/( -cycle) : =1.2(constant)
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