Marine Diesel Engine

4L126TI Rating output : H : 331kW (450PS) / M : 364kW (495PS) / L : 401kW (545PS)

Displacement : 11,051cc

Dimension (L x W x H) : 1131mm x 904mm x 1153mm (Without Reduction Gear)

Doosan Infracore Co., Ltd.http://engine.doosaninfracore.co.kr

Doosan Tower 28TH FL. 275, Jangchungdan-Ro(St),

Jung-Gu, Seoul, 04563 Korea

Tel : +82 2 3398 8851 / Fax : +82 2 3398 8898

E-mail : enginesales@doosan.com

• Compact Design

• Enhanced engine power / Durability

• Low Fuel / Oil Consumption

• Easy Maintenance

Marine rating to ISO 3046

Heavy Duty• Opration hours : unlimited per year, unlimited per day

• Average load application : up to 90% • Percentages of time at full load : up to 80%

• Typical gearbox ratio : 2.5 ~ 6 * Application : Fishing trawler, Tug boat, Pushing vessel, Cargo boat, Freghter

Medium Duty• Opration hours : up to 3,000hr per year, up to 10hrs per day

• Average load application : up to 70%

• Percentages of time at full load : up to 30%

• Typical gearbox ratio : 2 ~ 3.5 * Application : Pilot boat, Escort boat, Passenger boat, Freighter, Ferry, Cruising vessel

Light Duty• Opration hours : up to 1,000hr per year, up to 5hrs per day

• Average load application : up to 50% • Percentages of time at full load : up to 20%

• Typical gearbox ratio : 1 ~ 2.5

* Application : Yacht, Cruising vessel, Fast boat, Fire pump

Main Specification

Model Units4L126TI

4L126TIH 4L126TIM 4L126TIL

Engine type 4Cyl, In line, Direct-Injection, Water Cooled with turbo charger & Inter-cooler

Rating output PS(kW) / rpm 450(331) / 2000 495(364) / 2100 545(401) / 2200

Displacement cc 11,051

Cylinder number - bore x stroke mm 6-123 x 155

Flywheel housing & fly wheel SAE 1 & 14

Low idling rpm rpm 725±25

No load max. rpm rpm below 2200 below 2300 below 2400

Compression ratio 16.7:1

Firing order 1-5-3-6-2-4

Governor type of injection pump Mechanical Variable Speed (R.S.V)

Fuel consumption (only Ref.) @rated powerg / PS.h 157 166 173

Lit. / h 84 93 108

Starting system Electric Starting by starter motor

Starter motor capacity V - kW 24 – 6.0

Alternator capacity V - A 24 – 80

Battery V - Ah 12 – 150

Cooling system Indirect sea water cooling with heat exchanger

Cooling water capacity Max / Min Lit. 48 / 45

Fresh water pump type Centrifugal (Pulley type)

Sea water pump type Rubber Impeller

Lubricating oil(Engine)

Pan capacity Lit. Max : 44, Min : 20 (Engine Total 47)

Pressure kg / cm2 Full : 3.0, Idle : 1.0

Direction of revolution crankshaft Counter clockWise viewed from stern side

Engine size (L x W x H) without M / G mm 1311 x 904 x 1153

Engine dry weight without M / G kg 1136

130140

190200210220230240250260270280290300310320330340350360370380390400410420430440450460470480490

-400

-300

-200

-100

0

700

800

500 2500

Out

put

(PS)

Engine Speed(r.p.m)

(g/p

s.h)

Full load

Propulsion Curve

Fuel Consumption

600

500

400

300

1000 1500 2000

200

150160170180

100

Heavy Duty

Medium Duty

Light Duty

ENGINE COOLING WATER FILLER

ENGINE OIL FILLER

BELT COVER

37

122

1001.81008.8

1250.4 299.4

1856.8

30.9

16.78040.8

903.6460.6 443

EXHAUST GAS OUTLET

742.

288

9.4

SEE WATER INLET

Ø56

122

65

410.

6

360

146287.4720

795.6

BELT COVER

2-Ø17

ENGINE MOUNTING HOLES

AIR FIL ELEMENTØ114.3

1300

1311