Main Engine 2-Stroke · Main Engines (2-Stroke)
The MAN 5S90MC-C8 is a low‑speed, crosshead, 5‑cylinder main propulsion engine delivering up to 64 MW at 76 rpm, noted for its camshaft‑controlled injection and constant‑pressure turbocharging.
5 Zylinder, S=Super-Long-Stroke, 90=Bohrung 900 mm, MC=mechanisch, C=Compact, 8=Mark 8.
5-Zylinder S-Typ MC-C mit 900 mm Bohrung und 3.260 mm Hub. Einer der größten MC-C-Motoren, Vorgänger des S90ME-C. 5 Zylinder bei 900 mm ist ungewöhnlich kompakt. Bestandsflotte auf VLCCs.
| Parameter | Expected | Deviation means |
|---|---|---|
| Abgastemperatur nach Zylinder | 330-405 °C bei MCR | >25 °C Spread |
| Pmax | Gemäß Shop-Test ±3 bar | Spread >5 bar |
| Spülluftdruck | 3.0-3.8 bar abs | Zu niedrig |
| Kurbelwellen-Deflexion | Gemäß MAN S90 | Überschreitung |
Symptoms: Kühlwasserverlust
Causes: 900 mm maximale Fläche, Thermischer Stress
Preventive: Kühlwasserchemie pH 9.0-9.5, Ultraschall.
Symptoms: Temperatur, Metalldetektor
Causes: Extreme Kolbenmasse, Slow-Steaming
Preventive: Temperatur tägliche Auswertung.
Symptoms: Vibrationen
Causes: 5 Zylinder bei 900 mm
Preventive: Torsionsschwingungsdämpfer alle 4-5 Jahre.
IMO Tier I/II. EEXI ggf. EPL.
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