S60ME-LGIP
The MAN S60ME-LGIP is a low‑speed, two‑stroke main engine designed for dual‑fuel operation (LPG/gas and conventional marine fuels) with optional IMO Tier III compliance.
Engine Specifications
Inspector Detail
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Designation decoded
S for super-long-stroke, 60 for bore 600 mm, ME for electronic control, LGIP for LPG Injection Propulsion — dual-fuel for LPG (propane/butane) and ethane.
Background
The S60ME-LGIP combines the most-built medium-speed two-stroke with LPG dual-fuel. Application on medium to large LPG carriers. The S60 size with LGIP covers the power range for MGC (Medium Gas Carrier) and larger LPG carriers that use their cargo as fuel. LPG injection at 50-80 bar.
Calculated metrics
Inspector checklist
- Cylinder liner: 600 mm bore — wear profile, liner polishing risk due to clean LPG combustion
- Kolbenringe: Saubere Verbrennung ohne abrasive Partikel — spezielles Zylinderöl
- Kreuzkopf-Lager: Standard-S60-Belastung — Lagerspiel
- FIVA-Ventile: LGIP-spezifische Steuerung
- HPS: Kapazität für duale Steuerung
- ECS: LGIP software and parameterization
- LPG-Pumpen: 50-80 bar Förderdruck, Kavitationsfreiheit, NPSH
- LPG injectors: tightness and nozzle condition
- Fuel Conditioning: LPG flüssig halten — Unterkühlung sicherstellen
- Cargo-as-fuel interface: valve logic and safety interlocks
- Gas detectors: LPG heavier than air — sensors at floor level and bilge
- Ventilation: EX-Zonen für LPG
- ESD: LPG trip and diesel fallback
- Cargo system isolation during fuel withdrawal
- LPG-Dichtungen: Material-Kompatibilität mit LPG-Bestandteilen
- Doppelwand-Rohrsystem: Annulus-HC-Monitoring
- Stopfbuchse: Standard-Drainage-Überwachung
Logbook reference values
| Parameter | Expected | Deviation means |
|---|---|---|
| Exhaust gas temperature per cylinder | 330-395 °C at 85% MCR in LGIP mode | Spread >20 °C → LPG-Injektionsproblem |
| LPG-Förderdruck | 50-80 bar | Instability → pump or vapour bubbles |
| Pilot-Fuel-Anteil | 3-8% | Anstieg → LPG-Injektor-Problem |
| Zylinderöl-Feed-Rate | 0.4-0.6 g/kWh | Low BN for low-sulphur LPG operation |
| LPG-Temperatur vor Injektor | 10-15 °C below boiling point at operating pressure | Zu warm → Dampfblasen, Verbrennungsaussetzer |
Common Failure Modes
Expert tips
- 💡 S60-LGIP auf mittelgroßen LPG-Carriern: Die breite Erfahrungsbasis des S60-Grundmotors hilft — aber das LGIP-System erfordert zusätzliche Crew-Schulung
- 💡 LPG changeover between different cargoes (propane, butane, mixture): Each cargo has different evaporation characteristics — recalibrate fuel conditioning during cargo changeover
- 💡 Emergency operation: If LGIP fails, full diesel mode is available — calculate diesel supply for remaining distance
Related components
Classification & regulatory
IMO Tier II in diesel mode. IGF Code and SOLAS chapter for cargo as fuel. CII: LPG approx. 16% less CO2 than HFO.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Service & Maintenance
Fuel gas safety and leak detection routines must be performed as maker PMS. Combustion condition should be monitored by scavenge inspection and drain-oil analysis.
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