4.2 Smokeless medium-speed engines

・Release of fuel pressure from the nozzle between injections

・Flow fuse

・Fuel pressure comparison between accumulators

・Firing time sensor

The results concerning smoke exceed the most optimistic expectations and as Figure 13 shows, there is a wide margin to any visible smoke at any load.

　

Figure 11. The Wãrtsilã common rail system located in the hot box comprises pressurizing pumps and fuel accumulators, a layout which eliminates resks of fuel pressure waves in the system.

Figure 12. Common rail injector with solenoid valve and hydraulically actuated three-way valve for lowest smoke at low load.

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