5.2.9 Pilot injection valve
The two pilot injection valves per cylinder supply pilot fuel to each combustion chamber during
gas mode to ignite the gas-air mixture.
The ECS controls the pilot injection valves. The ECS calculates the injection timing and the pilot
fuel quantity related to the engine load.
The pilot injection valves have a combustion prechamber (005, Figure 5-15) to get the best
ignition timing and a stable combustion. Cooling water in the cylinder cover keeps cool the
prechamber.
System oil is used to lubricate and to seal the pilot injection valve. The fuel and system oil
leakage drains to the overflow tank.
Fig 5-15 Pilot injection valve (generic)
I
I
I - I
001
002
003
004
005
006
007
008
Legend
001 Electrical cable 005 Prechamber
002 Valve body 006 Bottom housing
003 Flange 007 Pilot fuel return
004 Top housing 008 Pilot fuel inlet
X92DF
AA00-2790-00AAA-043A-A
Operation Manual Pilot injection valve
Winterthur Gas & Diesel Ltd.
- 174 - Issue 002 2020-08
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