Wärtsilä has launched its FuelFlex injection control unit (ICU) upgade to meet the requirements of operating its RT-flex type two-stroke diesel engines with both residual and low-viscosity marine fuels
The upgrading solution is available for retrofitting on vessels with Wärtsilä RT-flex96C-B and RT-flex84T-D two-stroke engines.
The company’s product manager for two-stroke and specialised services, Jung Young Park said the new product “is a retrofit solution for customers that will increase both the reliability and environmental sustainability of their two-stroke engines. It also enables more flexible onboard maintenance of the unit, and the validation tests carried out have been very successful.”
Older generation ICUs were designed for continuous operation with residual fuels, and their long-term use with mainly low-viscosity fuels may result in shorter component life. Wärtsilä said the new FuelFlex ICU features a new design with more durable materials providing better resistance against leakage, while maintaining the designed service life expectancy of the component.
ICUs deliver a controlled quantity of fuel into the cylinder at timed intervals to ensure 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. Wärtsilä said the upgraded injection control unit is designed to address such issues.
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