Main Engine 2-Stroke · Main Engines (2-Stroke)
The MAN 6S90ME-LGIM9.6 is a low‑speed, six‑cylinder, two‑stroke main engine delivering up to 77 MW at 76 rpm, featuring dual‑fuel operation with high‑pressure methanol injection and diesel pilot ignition.
6 = Zylinderzahl, S = Super Long Stroke, 90 = Bohrung 900 mm, ME = MAN Electronically controlled, LGIM = Liquid Gas Injection Methanol, 9.6 = Mark 9.6 Steuerungsgeneration.
Die S90ME-LGIM ist die Super-Long-Stroke-Variante der 90er-Plattform. Kuerzerer Hub (3260 vs. 3720mm) als die G90, hoehere Drehzahl. Fuer sehr grosse Tanker (VLCCs) und Bulker. Die S90-Plattform ist bewaehrt und wird jetzt als LGIM fuer die Methanol-Transition angeboten.
| Parameter | Expected | Deviation means |
|---|---|---|
| Abgastemperatur (Methanol) | 290-380 Grad C | >25 Grad C Spread: Injektor |
| Methanol-Einspritzdruck | 600-700 bar | Pumpe/Filter |
| Zylindeloelverbrauch | 0.5-0.8 g/kWh | Dosierung |
| OMD | <2.5% LEL | Leckage — STOPP |
| Pmax Spread | +/-5 bar | Injektion/Kompression |
Symptoms: Pmax-Spread, T_exh ungleich
Causes: Pilot-Fuel-Rueckstaende, Spuelung unvollstaendig
Preventive: Alle 4000-6000 Bh pruefen.
Symptoms: Formaldehyd, Pmax niedrig
Causes: Duesenverschleiss, Druck niedrig
Preventive: Spray-Pattern dokumentieren.
Symptoms: OMD, Oelkontamination
Causes: Dichtringe, Verformung
Preventive: Drainage taeglich, Oel alle 500 Bh.
IGF Code, LFPF-Notation. IMO Tier II im Methanol-Modus. Tier III erfordert SCR/EGR.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
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