4.13 Pilot fuel system
The pilot fuel system supplies the pilot injection valves of the cylinders with the applicable
quantity of pilot fuel.
For the schematic diagrams, refer to section 13.1 Schematic diagrams - general.
The pilot fuel system has the engine connections as interface to the plant as follows:
•
Connection 76 (pilot fuel inlet)
•
Connection 77 (pilot fuel outlet).
Pilot fuel is diesel fuel and is used in gas mode to start the ignition of the gas-air mixture.
The pilot fuel system also operates with a decreased quantity of fuel injection during engine
operation in diesel mode. This prevents contamination on the ends of the pilot injection valves
and the prechambers.
The pilot fuel system has the parts that follow:
•
Pilot fuel pipes
The pilot fuel pipes connect the items of the pilot fuel system. The HP pilot fuel pipes
have a double wall design.
•
Supply unit pilot fuel
The supply unit pilot fuel increases the pressure of the pilot fuel to the necessary value.
•
Pilot injection valve
The pilot injection valves supply the pilot fuel to the related cylinders.
X92DF
AA00-0000-00AAA-043M-A
Operation Manual Pilot fuel system
Winterthur Gas & Diesel Ltd.
- 104 - Issue 002 2020-08
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