MAHA POWERDYNO MSR Series - Calculate Engine Factor Fm

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Pos: 143 /Tech nische D okumen tation/A lle G eräte/ Überschr iften/Üb ers chrifte n 1.1.1/M/ Übe rschr ift 1.1. 1: Mot orfak tor fm ber echne n @ 13\mod_1234268542057_75.docx @ 337401 @ 3 @ 1
2.10.6
Calculate Engine Factor fm
Pos: 144 /Te chnis che D okum ent ati on/ Leis tun gsm esst ech nik/ POWE R DYN O/0 523 01 LPS 3 000 R10 0/B A/I nhal t: 052 3 Mot orf akt or fm ber echne n @ 13\mod_1234268616541_75.docx @ 337427 @ @ 1
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:
652,37 ≤≤
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:
6540
≤≤
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
nD
F
q
⋅
= .120000
2-Takt Motoren
nD
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
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