New | VM 46 DF Marine Propulsion Engine

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.

Power Rating
Power Range10800 - 15440 kW
Engine Specifications
Speed Range500 / 514 rpm
EmissionsIMO II in diesel mode / IMO III in gas mode
AspirationTurbocharged
Bore18.11 in
Stroke24.02 in
Rotation from Flywheel EndCounterclockwise / Clockwise
Configuration12,16 Cylinder
Swept Volume6181.7 in³
Dimensions & Weights
Minimum Dry Weight352740 lb
Minimum Length387.7 in
Maximum Length470.2 in
Minimum Height200.7 in
Maximum Height201.7 in
Minimum Width153.1 in
Maximum Width158.5 in

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.

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

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