VM 46 DFNon-Current
VM 46 DF Propulsion
Overview
Based on the successful M 43 C MaK medium speed engine, the M 46 DF was designed by Caterpillar Motoren, Kiel to meet and exceed the reliability and lifetime expectations of the M 43 C while maintaining its class leading position regarding operational efficiency. With its clean design, the M 46 DF does allow fast and easy access to the system and components supporting the operation, service and maintenance simplicity MaK products are known for. Designed to operate on gaseous- as well as liquid (MDO HFO) fuels, the M 46 DF will meet IMO III emission limits while operating in gas mode and injecting a small amount of ignition fuel to control combustion. Attention was paid to the customers´ demand for a safe and reliable operation at varying engine loads and gas qualities.
Specifications
Units:
| Power Range | 10800 - 15440 kW |
| Speed Range | 500 / 514 rpm |
| Emissions | IMO II in diesel mode / IMO III in gas mode |
Benefits & Features
Operational Simplicity
Service & Maintenance Simplicity
Operation on natural gas with min. methane number of 55 possible at reduced load.
January 30, 2026
Specifications
Units:
| Power Range | 10800 - 15440 kW |
| Speed Range | 500 / 514 rpm |
| Emissions | IMO II in diesel mode / IMO III in gas mode |
| Aspiration | Turbocharged |
| Bore | — |
| Stroke | — |
| Rotation from Flywheel End | Counterclockwise / Clockwise |
| Configuration | 12,16 Cylinder |
| Swept Volume | — |
| Minimum Dry Weight | — |
| Minimum Length | — |
| Maximum Length | — |
| Minimum Height | — |
| Maximum Height | — |
| Minimum Width | — |
| Maximum Width | — |
Benefits & Features
Operational Simplicity
Service & Maintenance Simplicity
Operation on natural gas with min. methane number of 55 possible at reduced load.
Supports HFO operation according to CIMAC H55/K55 in diesel mode.
Data not available.
Standard Equipment
- Air Inlet System
- Air intake silencer / filter
- Control System
- Load sharing unit
- Modular Alarm Control Protection System (MACS)
- Speed governor
- Cooling System
- Electric cooling water preheater
- HT cooling water pump (engine driven)
- 2-stage charge air cooler
- Exhaust System
- Exhaust gas expansion joint
- Exhaust gas insulated manifolds
- Turbocharger at flywheel / counter-flywheel end
- Fuel System
- Fuel circulating pump (electric driven / for MDO/MGO only)
- Fuel indicator filter
- Fuel pressure valve (separate / for MDO/MGO only)
- Gas System
- Gas valve unit
- Instrumentation
- Control push buttons and lamps
- Emergency stop lever
- Local control panel
- Pressure and temperature indicator
- Lube System
- Dry sump
- Lube oil plate cooler (separate)
- Lube oil pump (engine driven)
- Lube oil safety filter
- Lube oil self-cleaning filter
- Pressure regulating valve
- Mounting System
- High flexible coupling
- Rigid mounting
- Starting System
- Electrical barring device
- Starting air valve
- General
- Lifting device (rental)
- Torsional Vibration Calculation (TVC)
Optional Equipment
- Air Inlet System
- Air inlet shut-off valve
- Air intake transition piece
- Expansion joint
- Silencer / filter
- Control System
- Engine alarm system
- Remote control system
- Remote indicators (start air pressure, engine speed, etc.)
- Starter for electric driven pumps
- 24 DC UPS
- Cooling System
- Cooling water preheater steam / thermal oil / electrical
- FW/SW plate cooler
- HT cooling water pump (electric driven)
- LT cooling water pump (electric driven)
- Sea water cooling pump (electric driven)
- Temperature control valve
- Exhaust System
- Exhaust gas ventilation module
- Silencer (with or withour spark arrester)
- Fuel System
- Fuel oil cooler
- HFO final preheater
- HFO pressure regulating valve
- HFO self-cleaning automatic filter
- HFO supply and booster pumps (electrical driven)
- HFO treatment and supply modules
- HFO viscosity control device
- Mixing tank
- Gas System
- Gas flowmeter
- LNG vaporizing unit
- Lube System
- Lube oil centrifuge
- Lube oil pump (electrical driven)
- Lube oil treatment and combined modules
- Pre-lubricating oil pump (electrical driven)
- Temperature control valve
- Wet sump with dip stick
- Mounting System
- Flexible pipe connections
- Resilient mounting
- Propulsion System
- Control system
- Thrusters
- Starting System
- Starting air compressor
- Starting air receiver
- General
- Engine PTO coupling
- PTO alternator
- PTO shaft on counter-flywheel side
- Reduction gear
- Reduction gear PTO coupling