MAHA LPS 3000, Operating Instructions Manual, Page: 39 / 115

BA052301-en
39
2.9.6 Calculate Engine Factor fm
In most cases fm = 0.3 applies but this value can be changed.
The following equations are used:
Engine factor fm based on ISO 1585:
65 2 , 37
 
r
q
14 , 1 . 036 , 0
− =
r
q
fm
2 , 37

r
q
2 , 0
=
fm
65

r
q
2 , 1
=
fm
Engine factor fm based on EWG 80/1269, SAE J1349 and JIS D1001:
65 40
 
r
q
14 , 1 . 036 , 0
− =
r
q
fm
40

r
q
3 , 0
=
fm
65

r
q
2 , 1
=
fm
Pressure behavior of the supercharging:
E
L
P
P
r
=
Specific fuel consumption based on SAE J1349:
4-Takt Motoren
n D
F
q

=
. 120000
2-Takt Motoren
n D
F
q

=
. 60000
with
•
fm Engine factor
•
r Pressure behavior of the supercharging
•
q Specific fuel consumption based on SAE J1349
•
p
L
Absolute boost pressure
•
p
E
Absolute pressure in front of the compressor
•
F Fuel flow (mg/s)
•
D Cubic capacity volume
•
n Engine RPM