UE Engine

LSJ Series

The LSJ Series is a model that integates the LSH Series with the UE engine’s independently-developed technologies of complete combustion and stratified water injection in order to meet the SOx global cap for using MGO or Maine Diesel Oil only in or after 2020. It achieves a significantly lower fuel consumption (improving fuel efficiency by about 5% compared to the previous models) while complying with NOx regulations. Integrated with our own technology - low-pressure EGR or low-pressure SCR system, it is possible to meet the Tier III regulations.
The LSJ Series is the first model that was developed with J-ENG’s JUMP concept solution.
The first UEC50LSJ-EGR engine was completed in December 2018. Subsequently the UEC35LSJ have developed and will be completed in June 2022. The LSJ Series, including the developing UEC42LSJ, is enhancing its product line-up.
※The development of 50LSJ is supported by Japan Foundation.
※LSJ has been awarded “Marine Engineering of the Year (Dokou Memorial Award) 2019”.
Water injection system is the feature of LSJ

The Merits of Using MGO (distillate fuel)

Similar to MDO and distillate fuel, marine gas oil (MGO) is a high-quality and environmentally-friendly fuel compared to HSFO(heavy fuel oil), which has been used in marine diesel engines up to now. Although the price is a bit high, it has good flammability, reducing engine trouble, and there are no issues with availability. Also, using a single MGO fuel makes the system simple, which leads to keeping the capital investment, operation, and ship maintenance costs low.

Fuel tanks, pumps, purifiers, filters, and heat race piping are among the on-board devices that can be significantly reduced and made to be more compact.

This leads to low fuel consumption, which can offset the high price of the fuel.

Feature of MGO(distillate fuel) and the other fuels

  MGO, MDO VLSFO (Compliant fuel) HSFO (Heavy fuel oil) LNG
Fuel price Expensive Relatively Expensive
Close to MGO?
Cheap Close to HFO
Fuel availability Good Good Good at present
In future?
Fuel property Good No specification
Fuel stability / Fuel compatibility
Long ignition delay / Poor combustion
Higher pour point
FCC(cat fine)
Same as the present Good
System Very simple due to mono fuel / no heating system same as the present SOx scrubber DF engine + LNG tank and supply system
Additional initial cost Small Unnecessary Very large Huge
Operation Easy same as the present Complicated Very complicated system
Only by skillful engineer
Other aspect Higher engine reliability and less maintenance Concerned about the engine and fuel system trouble Limited production and dock capacity for installing SOx scrubber
Limited scrubbing water dischange area
Environment friendly
Application Very potintial solution with MGO mono-fuel engine UEC-LSJ Majority Limited Very limited

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