Dual-Fuel Engines
DE20DF / DE23DF / DE28DF / DE35DF
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.
- Complies with IMO NOx Tier3 exhaust emission regulations (in gas mode)
- Low-fuel consumption realized with lean combustion technology and optimum valve timing(variable valve timing-mechanism)
- Improved redundancies with the independent pilot fuel injection system, and peace of mind thanks to the Independent Safety System (ISS) fail-safe control
-
Four-stage loading possible in gas mode (load response improvement)
*In the case of using DE28DF - 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
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
