Environmentally Friendly Engines Compliant with IMO Secondary Regulations Technology of DAIHATSU DE series Engine

Environmentally Friendly Engines We have successfully developed an environmentally friendly engine with high potential for meeting future emission regulations that are expected to become increasingly strict, such as those targeting the reduction of CO2 emissions. We have complied with the IMO emission standards by adding advanced combustion technology to the engine. D-Power for the Earth Easy Maintenance Ease & Safety Environmentally Friendly Engines Compliant with IMO Secondary Regulations

1 External View Photo of the Engine — 2 Output Range and Principal Particulars Engine Cross Sectional View: 6DE-18 • • Engine Cross Sectional View: 6DE-23 Comparison of the Outside Dimensions External View (Equipment Layout) • ■ Development Concept and Scheme- 7-1 I Earth-Friendly Environmental Harmony • 8—11 • Decreasing Exhaust Gas Emissions Hazardous Materials • Reduction of Operation Costs • Stable and Certain Engine Start • Securing the Lub.Oil Performance in the Long Life • Maintenance Intervals and Life Expectancy 7-3 I Improvement in Safety and Assurance "17-19 • Perfect Fire Prevention...

External View Photo of the Engine I Marine Gensets Diesel Engine I Marine Propulsion Diesel Engine

Output Range and Principal Particulars Output Range I Lineup: Marine Gensets Diesel Engine I Lineup: Marine Propulsion Diesel Engine Principal Particulars 1 Varies depending on the generator. Main engine specification dimensions extend from the crankshaft end. '(•2 The maximum width of the common baseplate mounting surface. Main engine specifications indicate the maximum width of the engine mount, '(•3 The height of the exhaust port from the common baseplate mounting surface. Main engine specifications indicate the height from the center of the crankshaft, '(•4 The height from the common baseplate...

6DE-18:Engine Cross Sectional View Exhaust pipe •With a fire prevention type cover •Dynamic pressure exhaust pipe exhaust valves • Heat resisting steel type with a valve rotator •Exhaust valve seat ring: Water-cooling type •Composite type Crown: Alloyed steel Skirt: Ductile cast iron •Chrome plated ring •Three compression backwash filter • Marine type •Crankpin bolt: Hydraulically tightened

□ 6DE-23:Engine Cross Sectional View Cylinder head strength special cast iron •The double shelf structure •Cooling enhancement around the exhaust valve seat by effective cooling water passage • Hydraulically tightened four studs Exhaust pipe •Excellent load correspondence enabled charging method Optimized matching with turbocharger efficiency Cylinder liner •Bore cooling type: Effective cooling •The special cast iron excellent in wear resistance •With the protect ring •Optimized cooling area backwash filter filtering performance maintenance work Engine frame high stiffness •The main bearing bolts...

Comparison of the Outside Dimensions with Conventional Models Comparison of the Outside Dimensions with Conventional Models (5DK-20) Blue 6DE-18 Red 5DK-20e Comparison of the Outside Dimensions with Conventional Models (8DK-20) Blue 6DE-23 Red 8DK-20e

External View (Equipment Layout) High Pressure Ratio, High Efficiency Turbocharger C.W.Thermostat Governor Air Cooler (High temp. side) C.W.Pump (High temp.) Fuel Feed Pump Fuel Filter (with Splash Prevention Cover) Wiring Rail Condition Display Air Cooler (Low temp. side) Junction Box Lub.Oil Pressure Regulator Intake Air Heating Switch Valve C.W. Pump (Low temp.) Lub.Oil Auto Backwash Filter Lub.Oil Pump Lub.Oil Bypass Filter Lub.Oil Cooler Crankcase Safety Valve with Flame Arrestor Lub.Oil Priming Pump

Development Concept and Scheme Concept Earth-Friendly Environmental Harmony Enhancement in Durability and Reliability for the Long Life Improvement in Safety and Assurance Scheme 1. Earth-Friendly Environmental Harmony Decreasing Exhaust Gas Emissions Conformity with IMO NOx regulations Tier 2 and Tier 3 Compatibility to low sulfur fuel oil Reduction of CO2 emissions with low fuel consumption and smokeless Reduction and Management of Hazardous Materials Compliance with the “Ship Recycling Convention” Reduction of the hazardous materials within the scope 3. Improvement in Safety and Assurance...

Earth-Friendly Environmental Harmony Decreasing Exhaust Gas Emissions Technology for the conformity with IMO NOx regulations Tier 2 Reduction by 80% (Emission Control Area(ECA)) Rated Engine Speed (1/min) • Optimized fuel injection timing • High-pressure fuel injection • Specifications for the optimized combustion chamber configuration and fuel nozzle spray holes • Optimized valve timing with consideration to the start performance and the transient response characteristics • Optimized matching of the high pressure ratio and the high efficiency turbocharger NOx Emission Compliance Concept Compression...

Q Development Concept and Scheme Earth-Friendly Environmental Harmony Decreasing Exhaust Gas Emissions I Compatibility to low sulfur fuel oil • Carbon coated plunger • Plunger oiling • Addition of lubricity improvers • Fuel feed pump for low • Engine inlet viscosity: 1. Adoption of the carbon coated plunger • Improvement in the slide performance and the wear resistance Affinity layer contacting material ■ Superb load bearing Base material mproved fatigue limit Results of durability tests under practical conditions Used for 2,000 hours Used for 5,000 hours • Able to enhance the sealing 3. Adoption...

I Low fuel consumption and smokeless for the reduction of CO2 emissions • High Pmax • High-pressure fuel injection • High efficiency, high-pressure *-- • Combustion system matching " ' • Reduction of mechanical loss • Optimized fuel control at transient response by an electronic governor • Improvement in turbocharger response by pulse turbo charging Reduction and Management of Hazardous Materials Existing vessels Newly built vessels (Hong Kong) treaty effective The time limit to make the inventory of the vessels in operation Shipyards issue the inventories of newly built vessels 1. Compliance...