WinGD X92DF User Manual

4.12 Gas system
The gas system supplies the gas admission valves (GAV) of the cylinders with the applicable
quantity of gas.
For the schematic diagrams, refer to section 13.1 Schematic diagrams - general.
The gas system has the engine connections as interface to the plant as follows (in Figure 4-13
marked with a circle):
•
Connection 25 (main oil inlet)
•
Connection 34 (leakage oil of driving end outlet)
•
Connection 35 (leakage oil of free end outlet)
•
Connection 38 (oil pipe drain of supply unit outlet)
•
Connection 52 (fuel leakage outlet)
•
Connection 76 (supply unit fuel pilot valve inlet)
•
Connection 77 (supply unit fuel pilot valve outlet)
•
Connection 78 (gas supply pipe inlet)
•
Connection 79 (gas release pipe, engine side outlet)
•
Connection 80 (gas release pipe, system side outlet)
•
Connection 81 (ventilation air annular space inlet)
•
Connection 82 (gas monitoring pipe piston under side).
The gas system is continuously monitored with gas detectors installed in the gas pipes. If there
is a gas leak, the gas detectors will activate an alarm.
When there is a fire alarm in the engine room and the engine operates in gas mode, the engine
control system automatically changes to diesel mode (gas trip) and closes the master gas fuel
valve.
The gas system has the parts that follow:
•
Gas pipes
The gas pipes connect the items of the gas system. All the gas pipes have a double wall
design. The annular spaces of the double wall pipes have open pipes to the atmosphere.
Fans cause a negative air pressure in the annular spaces. The air flows through the
annular spaces to the fans. The fans release the air and possible gas leakages to the
atmosphere.
•
Shut-off valve
The shut-off valves (005) on the fuel side and on the exhaust side isolate the gas supply
to the engine, if there is a gas leakage on the engine. The shut-off valves also isolate the
gas supply, if the engine runs in diesel mode.
•
Vent valve
The vent valves (007) on the fuel side and on the exhaust side release the remaining gas
to the atmosphere, when the shut-off valves are closed.
•
Gas admission valve (GAV)
The gas admission valves (GAV) (006) supply the gas to the related cylinders.
X92DF
AA00-0000-00AAA-043F-A
Operation Manual Gas system
Winterthur Gas & Diesel Ltd.
- 102 - Issue 002 2020-08

WinGD X92DF Specifications

General

Brand	WinGD
Model	X92DF
Category	Engine
Language	English