ME-GI MAN G90/95ME-10.5-GI

The optimised and lighter engine frame size is the result of an optimisation of:

-The connecting rod - Flexrod design;

-The exhaust valve and fuel injection;

-Integration of the top-controlled exhaust valve (TCEV) and fuel booster injection valve (FBIV) on the cylinder cover;

-Increased flexibility of the main bearing support;

-Improved piston crown design.

Dual fuel operation requires injection valves for both pilot fuel oil and gas. The FBIs operate as main injection valves when the engine operates in fuel oil mode and as pilot oil injectors when the engine operates in dual fuel mode. This means that the engine does not require additional or special pilot oil valves. The top cover of the 90 and 95ME- Gl has three FBIVs and three gas injection valves. When the gas injection valves are opened with hydraulic oil, a gas jet is injected into the combustion chamber.

Previously, gas operation had to be stopped if an unexpected fault occurred on a single cylinder. Another recent benefit added to the design is that one cylinder can be withdrawn from gas operation, while the engine continues in gas operation on the remaining cylinders. The cylinder not operating on gas may continue on fuel oil with unchanged load and performance depending on the nature of the fault.