UEC-LSJ series

Mar. 2023
Japan Engine Corporation© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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UEC-LSJ series Excellent fuel-efficient engine
 J-ENG’s Stratified injection system is applied.

Fuel and water are layered and injected.
Achieved Significant fuel efficiency without NOx increase.
6UEC35LSJ

 Simple system leads less operation and maintenance work
In case of MGO/MDO mono-fuel, N/A heat trace It is possible to apply carbon-free fuel such as ammonia

instead of water to layered injection, and to further reduce GHG byusing biofuel, etc., especially as a solution for zero emission of small
and medium-sized vessels. We have received more inquiries.

6UEC50LSJ© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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UEC-LSJ Low SFOC concept
Low FOC achieved by the combination of existing UE engine technologies
 Ultimate low FOC- “Complete combustion”

 Compliance with Tier3- “LP-EGR, HP-SCR or LP-SCR NOx reduction- “Stratified Water Injection”
FOCNOxNOx

Tier2 Limit

FOC

FOCNOxOriginal (Tier2)© 2023 Japan Engine Corporation

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LSJ engine (Tier2)

WMS-H862

Tier3 Limit

LSJ engine (Tier3)

Mar. 2022

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Stratified Water Injection system
Water pumped into fuel line during non-injection period,
Injected by Fuel Pump
Water Injection pump
Test result of water injection
SFOC %

Fuel valve and pumpfor water injection

Water Tank

Fuel Injection
Pump

Fuel Injection
Valve

Water

Water injection ratio（Water/Fuel）

Fuel© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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Stratified Water Injection unit
Stratified waterinjection unit

Water injection pump
Fuel pumpControl valve unit
Solenoid valve(for fuel injection)

Solenoid valve(for water injection)

6UEC50LSJ

Accumulator block© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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5Stratified Water Injection unit on UEC50LSJ

6UEC50LSJ

Fuel injection valves(Stratified injection spec)© 2023 Japan Engine Corporation

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Water injection pump
WMS-H862

Mar. 2022

Fuel injection pump
Unauthorized reproduction and copying prohibited

6

Advantage of MGO/MDO mono-fuelMGO/MDO

VLSFO

HFO

LNG

Mono-fuelS≦0.5%

S≦3.5%（Dual Fuel）

VLSFO

HFO

LNG

+MGO

+MGO

+MGO

goodgoodlimitedlimitedvery simple(mono・ no heating)current

SOx scrubber
appliedDF engine+ LNG tank,supply system

Capital investment

small

unnecessarybigenormous

Operation /Maintenanceeasy

current

complicatedvery complicatedneed qualified crew

Others

Improved engine
reliability, Reduction ofoperation andmaintenance work

Variations in fuelproperties, Possibilityof trouble

Purchase ability ofscrubber, Expansion ofprohibited bleed off areaGood environmentalperformance

Application

promising
MGO/MDO mono-fuel
UEC-LSJ

Majorlimitedvery limited

Fuel type

MGO (or MDO)

Fuel availability
System in vessel© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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7

Aim of Stratified water injection + MGO/MDO mono-fuelFor ship owner

For shipping company- Reduce Non-operation risk
- CSR improvement- Improved engine reliability- Reduce Non-operation risk
- Maintenance cost reduction- Reduce Marine pollution risk

For crew

For shipyard- Excellent fuel-efficient(Both sailing and anchored)- Easy operation- No SOx scrubber(No fuel change over)- Simplified engine room

- Less maintenance work
⇒ Burden reduction(mono-fuel, no-heating)Benefits for all shipping stakeholders© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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8Mixing liquid fuel with Stratified injection technology
Applicable to co-combustion of different liquid fuels【Sample】
Water
Injection
pump

Fuel
Injection
pump
Fuel
Injection
valve

Fuel②

Fuel①：MGO, Biofuel etc.
Fuel②：Ammonia
Methanol
Ethanol
LPG
Biofuel etc.

Potential for mixing andspraying different fuels,
Applicable to co-combustion© 2023 Japan Engine Corporation

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Fuel①

WMS-H862

Mar. 2022

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Further GHG reduction with UEC-LSJ
One of the best solution for GHG reduction of small and medium-seize vessels
 UEC-LSJ has the potential to meet the gradual tightening of GHG reduction regulations
using stratified injection technology.
⇒ Operation while minimizing the decrease of vessel’s value may possible
 Compared to LNG, UEC-LSJ does not require a large initial investment and has anadvantage in life cycle cost.
 Does not require a qualified crew member like LNG.
⇒ Excellent solution for both CAPEX / OPEX

⇒ Easy to deal with ship crew problems
Started development of GHG reduction engine using stratified
injection system© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

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Thank you for your attention© 2023 Japan Engine Corporation

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WMS-H862

Mar. 2022

Unauthorized reproduction and copying prohibited11