Engine Design

The CM46DF features a world-class reliable and durable medium speed long-stroke engine design. It has a compact cylinder head design as well as a nodular cast-iron block with integrated ducts for lubricating oil and charge air/ The engine design is based on the higher requirements of crude oil for the offshore industry. The miller cycle and high efficiency turbo charger enables lower combustion temperature, avoiding knocking at high load or low methane type fuels. The CM46DF has cylinder balancing to increase safety margin against knocking. It is designed to be a compact module for lower valve drives and injection pump drives with cam followers. This flexible camshaft technology optimizes valve operation to maintain low emissions as well as control valve timing for optimal efficiency and wider operating range avoiding knocking and misfiring.

Ease of Installation

Standard modular design allows for ease of installation and reduced complexity. Low installation cost with auxiliary systems mounted on engine. Cooling water system with simple plug-in connections

Improved Serviceability

Large inspection openings for convenient access to core engine components. Core engine components designed for reconditioning and reuse at overhaul. Worldwide dealer network with factory-trained techniciansmeans that parts and support are never out of reach. Segmental camshaft design. Split connecting rod design for quick piston removal. Individual camshaft segments for easy removal

Engine Specifications
Maximum Rating 14976 ekW (18720 kVA)
Engine Specification
Emissions IMOII/III
Engine Specifications
Aspiration Tubrocharged Aftercooled
Engine Control Electronic
Engine Specifications
Stroke 610 mm (24 in)
Bore 460 mm (18.1 in)
Displacement 1622 L (98980.5 in3)
Dimensions
Height 7640 mm (300 in3)
Dimensions
Length 16800 mm (661 in)
Width 3800 mm (151 in)
Weight 345 t (690000 lbs)

Standard Equipment

  • Engine
    • Motor-driven barring gear, fitted on engine
    • Emergency shutdown equipment with push button for manual emergency stop
  • Cylinder Head
    • Fuel injector and integrated gas admission valve with easy service and maintenance access
    • Cylinder pressure sensors for highest operational reliability and efficiency, replacing conventional knocking sensor technology
    • Piston, rings and liners designed for operation on gas and liquid fuels
  • Turbocharger
    • Optimized engine efficiency in gas and diesel operation
    • Blow-off valve and waste gate technology for optimized air-fuel ratio control
  • Gas System
    • Double-walled gas piping to support an inherently safe engine room concept
    • Leakage detection
    • Gas valve unit
    • Segmented gas detection system on request
  • Micro Pilot Fuel Injection System
    • Gear driven high pressure fuel pump and filter system with easy service access
    • Reliability combined with service and maintenance simplicity, through individual ignition fuel injector and “in-cylinder head” integrated ignition fuel return pipes
  • Exhaust System
    • Front-mounted turbocharger at free end with transition nozzle (0 degrees from the vertical and away from engine), with compressor cleaning device
    • Expansion joint separate
    • Separate silencer and spark arrester
  • Fresh Cooling Water System
    • HT pump, fitted on engine
    • LT pump, separate, vertical design, electric motor driven
    • HT thermostat, remote-mounted, electric controlled
    • Cooling water preheating equipment, fitted on base frame
  • Lubricating Oil System
    • Safety filter fitted on engine
    • Force pump, fitted on engine
    • Pre-lubrication pump, fitted on base frame, electric motor driven
    • Automatic back-flushing filter
    • Duplex filter with differential pressure indication, fitted on engine
    • Pressure control valve, fitted on engine
    • Thermostat, remote-mounted, electric controlled
  • Connections
    • Set of connecting parts between flange coupling and flywheel
    • Flexible flange coupling between engine and generator
    • Base frame with flywheel guard and incorporating lube oil sump tank, for engine and generator
    • Mounting of engine and generator on the base frame
    • Set of bonded rubber rails for resilient mounting of the base frame
    • Set of flexible pipe connections
  • Instrumentation
    • Gauge board with liquid-dampened pressure gauges for: fuel, lubricating oil, fresh water, starting air and charge air.
    • On-engine thermometers for fuel, lubricating oil, fresh water and charge air
    • Electric remote speed indicator
    • Turbocharger and remote speed indicator
    • Exhaust gas temperature indicator
  • Monitoring
    • Manual control on engine, including: control panel with start/stop key, speed setting device, mechanical shutdown device, changeover of control functions from engine to remote control
    • Starting solenoid valve on engine, 24 V DC
    • Separate electronic speed governor

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