Mitsubishi S4Q2 User Manual

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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
PERFORMANCE TEST
ENGLISH
TESTING AND ADJUSTING
1. Standard atmospheric conditions
2. Calculation of corrected output value
Multiply the measured shaft output or torque by the
calculated diesel engine correction factor (see
below) to obtained a corrected value.
1) Atmospheric conditions for test
Temperature (T): 283 K (10ºC) [50ºF] ≤ T ≤
313 K (40ºC) [104ºF]
Dry atmospheric pressure (Pd): 80 kPa (600
mmHg) ≤ Pd ≤ 110 kPa (825 mmHg)
3. Calculation of correction factor (
αc)
fa: Atmospheric factor
fm: Engine factor
1) Calculation of atmospheric factor (fa)
a Natural aspiration engine and engine with
mechanically driven air charger
fa = ( ) · ( )
0.7
b Turbocharged engine without air cooler (after
cooler) or with air-to-air cooler
fa = ( )
0.7
· ( )
1.2
c Turbocharged engine with air-to-liquid cooler
fa = ( )
0.7
· ( )
0.7
2) Calculation of engine factor (fm)
fm = 0.036 qc – 1.14
a qc (Corrected fuel supply volume) =
z = 120000 (4-cycle engine)
r: Ratio of pressure at turbocharger or air
cooler to atmospheric pressure (r = 1 for
natural aspiration engine)
Temperature 298 K (25°C) [77°F]
Atmospheric pressure 100 kPa [750 mmHg]
Atmospheric vapor pressure 99 kPa [743 mmHg]
Corrected output = Correction factor (αc) x Measured shaft
output
αc = (fa)
fm
99
Pd
-------
T
298
----------
99
Pd
-------
T
298
----------
99
Pd
-------
T
298
----------
q
r
---
q
z() Fuel flow rate g/s()×
Stroke volume ()Engine revolution rpm()×
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Mitsubishi S4Q2 Specifications

General

Brand	Mitsubishi
Model	S4Q2
Category	Engine
Language	English