For operation on liquid and gaseous fuels

M 46 DF • Dual Fuel Engine

Technical Data

Gas Fuel

Liquid Fuel

Subject to change without notice.Leaflet No. 256 · 05.12 · e · L+S · VM3

© 2012 Caterpillar All Rights Reserved. Printed in Germany. CAT, CATERPILLAR, theirrespective logos, ACERT, ADEM, „Caterpillar Yellow“ and the POWER EDGE tradedress, as well as corporate identity used herein, are trademarks of Caterpillar andmay not be used without permission

Caterpillar Marine Power Systems is committed to sustainability. This document is printed on PEFC certificated paper.

Europe, Africa, Middle East

Caterpillar MarinePower SystemsA Division of Caterpillar Motoren GmbH & Co.KGNeumühlen 922763 Hamburg/Germany

Phone: +49 40 2380-3000Telefax: +49 40 2380-3535

Caterpillar Marine Asia Pacific Pte Ltd

No. 5 Tukang Innovation GroveSingapore 618304Republic of Singapore

Phone: +65 68287-600Telefax: +65 68287-625

Americas

MaK Americas Inc.

3450 Executive WayMiramar Park of CommerceMiramar, FL. 33025/USA

Phone: +1 954 885 3200Telefax: +1 954 885 3131

Caterpillar Marine Trading(Shanghai) Co., Ltd.

25/F, Caterpillar Marine Center1319, Yan’an West Road200050 Shanghai/P. R.China

Phone: +86 21 6226 2200Telefax: +86 21 6226 4500

Asia PacificHeadquarters

Caterpillar MarinePower SystemsA Division of Caterpillar Motoren GmbH & Co.KGNeumühlen 922763 Hamburg/Germany

Phone: +49 40 2380-3000Telefax: +49 40 2380-3535

For more information please visit our website:MARINE.CAT.COM

Caterpillar Marine Power Systems

TM

Operational simplicity and engine characteristics:■ Key attributes of the M 46 DF are

class leading efficiency and loading capacity as well as the operational simplicity which is supported by a fully automated engine control.

■ Fast service access as well as service and maintenance simplicity are supported by a modular engine design. concept and the monitoring and diagnostic system.

■ Operation on natural gas with min. methane number of 55 possible at reduced load.

■ Supports HFO operation according to CIMAC H55/K55 in diesel mode.

Excellent support:■ Global application and installation

support for engine and gas system periphery.

■ Operator and technician training.■ Strong, global product support

network with Marine focus.

Conversion of M 43 C to M 46 DF enginesare supported by similar dimensions andsystem interfaces.All mentioned data are preliminary!

CYL.

NO

:1M

. Zyl

.1

Engine A B C D E F G H I t6 M 46 DF 8271 1086 1255 1638 4258 1396 750 2878 215 947 M 46 DF 9068 1119 1255 1704 4749 1396 750 2878 232 1078 M 46 DF 9798 1119 1255 1704 4749 1396 750 2878 232 1149 M 46 DF 10528 1119 1255 1704 4749 1396 750 2878 232 127

Propulsion Engine Dimensions (mm) and Weights ( t )

A

BCD

H

GF

E

I

Diesel Mode Gas Mode

Emission IMO II IMO III

Bore mm 460 460

Stroke mm 610 610

Speed rpm 500/514 500/514

Power kW/cyl. 900 900 (MN≥80)

BMEP bar 21.3/20.7 21.3/20.7

Liquid fuel g/kW @100% 186 1.9consumption

Gas fuel kJ/kW @100% 7,200consumption

Efficiency % 45.0 50.0(development target)

Without engine driven pumps. Tolerance for SFOC and efficiency +/-5%.

Dual_Fuel_Prospekt_2011_d_Layout 1 23.04.12 11:33 Seite 1

The Dual Fuel Engine Concept MaK Dual Fuel Engines

Designed for Reliable Operation

Fuel Flexibility and High Efficiency: A new Generation of Engines built by Caterpillar Motoren!

Building on its marine engine legacyCaterpillar Motoren designed the M 46 DFfor a variety of marine applications with-out sacrificing the typical MaK marine engine attributes like operational reliabil-ity and efficiency as well as service-ability. Designed to meet the stringentconditions of upcoming emission- andfuel sulfur regulation the M 46 DF willprovide maximum flexibility for vessel operating in regulated and/or lesser regulated areas without significantchanges to engine room or the exhaustgas system, maintaining installation andcertification simplicity at the same time.

The low emission footprint paired withhigh efficiency and reliability make the M 46 DF an ideal propulsion engine foroperation, in- and outside of environmen-tal protected areas as well as waterswith HFO limitations.

Upcoming IMO III emission regulations,selected operation profiles and dieselfuel costs make the M 46 DF a preferredengine regarding lowest cost of opera-tion.

■ The operator-friendly service and maintenance concept is supported by the modular engine design.

■ State-of-the-art material ensures long life of components.

■ Flexibility to switch in-between diesel and gas mode while allowing operation on a variety of different diesel- and gas qualities.

Cylinder Head – Ignition fuel injector and integrated

gas admission valve with easy service and maintenance access.

– Cylinder pressure sensors for highest operational- reliability and efficiency, replacing conventional knocking sensor technology.

Exhaust Manifold & Cladding – Explosion relief valves integrated.Piston, Piston Rings and Liner – Designed for operation on

gas and diesel. – Bore increase.Connecting Rod – Reduced compression ratio.– Marine head connecting rod for

shortest piston removal height. Engine Block – M 43 C footprint and interface. Camshaft – Camshaft timing optimized

for gas mode operation.Crankshaft– No dimensional change. – Advanced crankshaft material.

Ope

ratio

nal C

ost (

%)

100

175

150

125

100

75 2011 Zeebruegge LNG price incl. transport

LSF

HFO

Gas

SCR

SCR + SCBOtto DF

Base

All mentioned data are preliminary!

PowerManagementSystem PMS

GasManagementSystem GMS

(Load Sharing)

Gas Valve Unit

MDO PilotFuel System

HFO –Module

Alarm & Monitoring

System

To Ship’s Alarm & Monitoring

Fuel Pipes

Alarm & Monitoring

Supply Voltage

Controls

Engine M46DF

Standard Cat Supply

Optional Cat SupplyGas Tank

Gas HandlingPlant

■ Into the lubricating oil system integrated injector cooling, intensive cooling of exhaust valves and exhaust valves seats do ensure reliable operation and long component life time in gas and diesel mode.

Gas System – Double walled gas piping to support

an inherently safe engine room concept.

– Leakage detection.– Segmented gas detection system

on request.Flexible Camshaft Technology (FCT) and lower valve train – New eccentric profile.– Actuation linkage.

■ Control & Monitoring Systems – Control system for gas- and diesel mode operation.– Real time cylinder pressure monitoring for optimized cylinder

balancing and higher efficiency.– Communication and interaction with engine system peripherals

through data bus systems.– Auto change from gas- to diesel mode operation and vice versa

without power interruption.– Remote monitoring and service diagnostics.

1

5

5

6

6

7

7

8

8

9

9

10

10

11

11

2

1

2

4

3

Based on the successful M 43 C MaKmedium speed engine, Caterpillar Mo-toren, Kiel designed the M 46 DF to meetand exceed the M 43 C reliability and life-time expectations, while maintaining it’sclass leading position regarding opera-tional efficiency and reliability.

Applying the same design philosophies,the M 46 DF will share the same footprintwith the M 43 C providing the opportunityto retrofit M 43 C engines.

With it’s clean design the M 46 DF doesallow fast and easy access to system andcomponents, supporting the operation, service and maintenance simplicity MaKproducts are known for.

Designed to operate on gaseous- as wellas liquid (MDO HFO) fuels the M 46 DF will meet IMO III emission limits while operating in gas mode, injecting a smallamount of ignition fuel to control combustion.

The M 46 DF will comply with IMO II emission regulations while operating indiesel mode. (liquid fuels only)

Attention was paid to customers demandfor a safe and reliable operation at varyingengine loads and gas qualities.

EGR

% s

ulph

ur c

onte

nt in

fuel

2008 2010 2012 2014 2016 2018 2020 2022

5,0%

4,5%

4,0%

3,5%

3,0%

2,5%

2,0%

1,5%

1,0%

0,5%

0,0%

Marpol Annex VI Sulphur limits

IMO II

IMO I

IMO III

Global limitECA limit

500–

1000

rpm

NO x

rang

e2–

14 g

/kW

h

Turbocharger – Optimized for gas mode operation

and superior engine efficiency in gas- and diesel operation mode.

– Blow off valve and waste gate technology for optimized air fuel ratio control.

Micro pilot fuel injection system – Gear driven high pressure fuel

pump and filter system with easy service access.

– Reliability combined with service and maintenance simplicity, through individual ignition fuel injector and “in-cylinder head” integrated ignition fuel return pipes.

3

4

First Cost (%)

2024

Dual_Fuel_Prospekt_2011_d_Layout 1 23.04.12 11:34 Seite 2