3.1
Short description of the DF engine
The engine is a single acting two-stroke dual fuel (DF) engine of crosshead design. The engine
has turbochargers and exhaust valves.
General data about the engine are given as follows:
•
In diesel mode, the engine can use marine diesel oil (MDO) and heavy fuel oil (HFO) with
different qualities. In diesel mode also a small quantity of pilot fuel is injected to prevent
contamination of the pilot fuel valves.
•
In gas mode, the engine uses liquefied natural gas (LNG) at low-pressure. Thus the lean-
burn principle (Otto cycle) is used. The pilot fuel is marine diesel oil that is injected into
the cylinder to ignite the gas-air mixture. In gas mode the engine obeys the IMO Tier III
regulations.
•
In the optional fuel sharing mode (refer to
), the engine can use a mixture of
MDO/HFO and LNG in the given range.
•
The engine obeys the IGC (International Code for the Construction and Equipment of
Ships Carrying Liquefied Gases in Bulk) and the IGF (International Code for Ships using
Gas or other Low Flashpoint Fuels) codes.
•
The engine uses the common-rail system with full electronic control of the fuel injection
system, exhaust valve operation, starting valve operation, and cylinder operation.
•
Related to the design, the engine turns clockwise or counterclockwise for the ahead
direction. For the astern direction the engine can turn in the other direction.
•
The engine control system (ECS) electronically controls all important engine functions (eg
speed control, overspeed protection, and fuel injection). The engine control can have
different remote controls, which are related to the WinGD specifications from
recommended manufacturers.
X92DF
AA00-0000-00AAA-020B-A
Operation Manual
Short description of the DF engine
Winterthur Gas & Diesel Ltd.
- 64 -
Issue 002 2020-08
