Dual-Fuel Engines

DE20DF / DE23DF / DE28DF / DE35DF

BlueGK28DF

Further reducing the environmental impact of our engines we introduce our DF engine lineup: dual-fuel engines that switch seamlessly between gas and liquid fuel and, unlike a conventional diesel engine, can cut NOx by up to 80% during gas mode operation. This series brings together tried and tested technologies from our accredited diesel and gas lines into one economic solution.

  1. Complies with IMO NOx Tier3 exhaust emission regulations (in gas mode)
  2. Low-fuel consumption realized with lean combustion technology and optimum valve timing(variable valve timing-mechanism)
  3. Improved redundancies with the independent pilot fuel injection system, and peace of mind thanks to the Independent Safety System (ISS) fail-safe control
  4. Four-stage loading possible in gas mode (load response improvement)
    *In the case of using DE28DF
  5. Supports various fuels(Oil:HFO/MDO/MGO, GAS:LNG)

Safety Features of the Engine's Gas Piping Area

    • Double-walled gas piping system
    • Ventilation function of first wall piping lines, and installed gas leak detection
    • Instantaneous switching to diesel mode in the event of gas slip (failure of gas supply system), with injection of inert gas into the gas fuel pipe

    Gas Piping Layout Diagram

    Specifications

    Model Unit DE20DF DE23DF
    Maximum engine output kWm 890
    1,200 
    Rotation speed min-1 900 900 
    No. of cylinders 6 6
    Bore mm 205 230
    Stroke mm 300 320
    Fuel

    Natural gas(gas mode)

    MDO, MGO, HFO(diesel mode)

    Pilot fuel(gas mode) MDO or MGO(approx. 1% of total heating value)
    Overall Length(*) mm 5,395 6,205 
    Overall Width(*) mm 1,885 1,925
    Overall Height(*) mm 3,245   3,330 
    Piston Overhaul Height(*) mm 1,530  1,645 
    Generator Set Dry Mass(*) ton 17  27 
    Model Unit DE28DF DE35DF
    Maximum engine output kWm 1,730 / 3,060 / 4,080
    Rotation speed min-1 720 / 720
    No. of cylinders 6 / 6 / 8
    Bore mm 280 350
    Stroke mm 390 440
    Fuel Natural gas(gas mode)
    MDO, MGO, HFO(diesel mode)
    Pilot fuel(gas mode) MDO or MGO(approx. 1% of total heating value)
    Overall Length(*) mm 7,195 / 9,065 / 10,470
    Overall Width(*) mm 2,040 2,395
    Overall Height(*) mm 3,995 / 4150
    Piston Overhaul Height(*) mm 2,065 2,555
    Generator Set Dry Mass(*) ton 36 / 81 / 98

    ※ Actual dimensions and mass may vary depending on the specifications of the generator unit.

    DF Engine Structure

     DF Engine Structure