For Worldwide Release: May 4, 2005 Cat C9 Marine Engine ...

For Worldwide Release: May 4, 2005
Release Number: M16PR05
Cat ® C9 Marine Engine Employs Sophisticated Fuel System for Performance,
Fuel Economy
Engine’s Reduced Emissions Meet IMO Standards
News
The C9 marine propulsion engine from Caterpillar takes full advantage of a sophisticated fuel
system designed for high-power operation, fuel economy and low emissions. With advanced
controls and technologies, the C9 replaces the similarly rated veteran workhorse Cat ® 3306
engine.
The in-line, six-cylinder C9 diesel engine is rated at 510 mhp (503 bhp) 375 bkW at 2500 rpm
with a constant, flat power curve reserve to 2000 rpm. The flat power curve allows the engine
to draw on reserve power for easy acceleration, providing more power and speed for multiple
commercial marine applications, including lobster boats, fishing boats, patrol boats, harbor
vessels and municipal boats.
The 8.8-liter turbocharged-aftercooled C9 is electronically controlled and offers a fuel efficiency
of 26.2 gallons/hour (99.2 liters/hour). In addition to a 16.2:1 compression ratio, hardened
mid-supported wet cylinder liners allow for a higher top piston ring position for better fuel
consumption, reduced emissions and a virtually smoke- and soot-free operation.
The C9 is IMO compliant and capable of meeting all current emission regulations. This
capability occurs through a combination of elements in Caterpillar’s ACERT ® Technology,
including the Caterpillar ADEM III controller and patented HEUI B fuel system. ACERT
Technology provides a clear path to meet future emission regulations.

The ADEM III is an electronic control module (ECM) that provides multiple control inputs and
outputs, allowing numerous parameters to be controlled and monitored. The system provides
engine speed governing, automatic air-fuel ratio control, engine parameter monitoring, cold start
strategy, engine synchronization and system diagnostics. It also allows customers to control the
engine’s trolling mode strategy and slow vessel mode, which permits a full range of throttle
motion during trolling, from a low idle speed to a maximum trolling speed.
In addition, the ADEM III provides integration with optional display systems such as the Marine
Power Display (MPD), which is a large backlit LCD screen that makes quick reading possible
for vessel operators. The display provides trip value and total values for engine hours, fuel
used, average load factor, average fuel consumption, idle hours and idle fuel. The C9 is also
compatible with Caterpillar’s Engine Vision Display (EVD) and Marine Analog Power Display
(MAPD) systems.
The HEUI B fuel system utilizes hydraulically actuated, electronically controlled unit injectors
to inject fuel into the cylinder. The system allows complete, adjustment-free electronic control
of fuel injection pressure, timing and duration. This provides greater flexibility for programmed
electronic control strategies that determine engine performance and emissions control
characteristics. The HEUI system also contributes to the C9’s outstanding acceleration and
reserve power.
Vessel owners can receive prompt service and support worldwide from Caterpillar-trained
engineers and technicians. Caterpillar supplies complete literature and service guides to enable
vessel engineers to troubleshoot and facilitate repairs while underway.
Table 1. C9 Ratings and Fuel Consumption
Rating mhp bhp bkW Aspiration Cooling rpm U.S. L/h
System
gph
E 510 503 375 TA SC 2500 26.2 99.1
bhp – brake horsepower mhp – metric horsepower
bkW – metric equivalent of brake horsepower SC – separate circuit aftercooled
L/h – liters per hour TA – turbocharged aftercooled
NA – not available U.S. gph – U.S. gallons per hour
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About Caterpillar Marine Power Systems
Caterpillar Marine Power Systems, with headquarters in Hamburg, Germany, was created to
bring together all sales and service activities for Cat ® and MaK branded marine products
within Caterpillar Inc. This organization provides premier marine power solutions (high and
medium speed with outputs from 11 kW to 16,000 kW) and customer service from a single
source for the global commercial/ocean-going and pleasure craft markets. The Caterpillar Marine
Power Systems sales and service network includes more than 1800 dealer locations worldwide
and is well positioned to support the customers wherever they are.
More information is available at www.cat-marine.com or www.mak-global.com.
About Caterpillar
For more than 75 years, Caterpillar Inc. has been building the world’s infrastructure and, in
partnership with its worldwide dealer network, is driving positive and sustainable change on
every continent. With 2004 sales and revenues of $30.25 billion, Caterpillar is a technology
leader and the world’s leading manufacturer of construction and mining equipment, clean diesel
and natural gas engines and industrial gas turbines.
More information is available at www.cat.com.
Editorial information for Editorial information for
Americas: Europe, Africa, Middle East
and Asia Pacific:
Monica Trepanier
Phone: +1 309 578-3985
E-mail: trepanier_monica_a@CAT.com
Ronald Brügmann
Phone: +49 40 2380-3104
E-mail: bruegmann_ronald@CAT.com
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