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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