Wärtsilä launched its FuelFlex Injection Control Unit (ICU) upgrading solution available for retrofitting on vessels with Wärtsilä RT-flex96C-B and RT-flex84T-D two-stroke engines to meet the requirements of operating its RT-flex type two-stroke diesel engines with both residual and low-viscosity marine fuels. According to Wärtsilä, this is particularly relevant in view of the industry’s increasing use of low-sulphur-content fuels in order to be compliant with sulphur emission regulations.
ICUs deliver a precisely controlled quantity of fuel into the cylinder at timed intervals, thereby ensuring efficient combustion at any engine load. The accuracy of the fuel metering and injection timing can be affected by leakages in the piston and valves within the ICU, with the fuel viscosity, pressure differential and clearances having an impact on the amount of leakage. The upgraded Wärtsilä ICU is designed to address such issues.
