US NAVY'S - Incat

New Engine Targets
Power, Economy and
Ecology
INCAT was recently a “launch customer” for the first of
MAN Diesel’s new high power density engine, the type
28/33D. In this way, the 28/33D takes over seamlessly from
an illustrious predecessor: the MAN Diesel Ruston RK270
had been the engine of choice in INCAT fast multi-hull
ferries ever since the Hoverspeed Great Britain took the
Blue Riband (Hales Trophy) for the fastest Atlantic Crossing
by a passenger ship on its maiden voyage in 1990.
As well as increased power output - the 28/33D is offered
in 12V, 16V and 20V versions in a power range from 5400
to 9000 kW – the new engine also features improved
specific fuel consumption and exhaust emissions. The
improvements are based on the latest engine technology,
including state-of-the-art combustion chamber and
porting geometry and an electronically controlled fuel
injection system.
Always strongly interrelated, fuel consumption and
emissions are ever more inextricably linked. Legal limits on
the harmful emissions from combustion engines have been
in force for many years and, more recently, were joined
THE NEXT STEP IN ELECTRONIC ENGINE MANAGEMENT
FROM MAN DIESEL, “SaCoSone” THE ACRONYM STANDS
FOR “SAFETY AND CONTROL SYSTEM” AND THE SUFFIX FOR
“ON ENGINE, - THE SYSTEM IS VERY COMPACT AND WILL BE
MOUNTED ON THE STRUCTURE OF THE 28/33D.
GRAPH OF THE EVOLUTION OF TYPICAL FUEL
CONSUMPTION LEVELS FOR LARGE HIGH
POWER DENSITY DIESEL ENGINES. YEAR ON
YEAR IMPROVEMENTS MEAN THE DIESEL
ENGINE HAS NEVER BEEN OVERTAKEN AS
THE MOST FUEL EFFICIENT MARINE PRIME
MOVER. ACCORDINGLY, THE 28/33D
FEATURES A 5 TO 7% REDUCTION IN SPECIFIC
FUEL CONSUMPTION AT UNCHANGED NOX
EMISSIONS COMPARED WITH ITS IMMEDIATE
PREDECESSOR.
THE NEXT HURDLE FOR MARINE ENGINE EMISSIONS – “IMO TIER II”
18 Incat THE Magazine Issue 36