Page 78: of Maritime Reporter Magazine (June 2005)

June 2005 77

Caterpillar C4.4 Marine

Genset

The C4.4 marine genset from

Caterpillar Marine Power

Systems is designed to give operators a low total cost of ownership. The genset also lim- its noise and vibration while generating power for a wide range of needs, including heavy load applications. Improved fuel economy is achieved throughout the C4.4 genset's entire speed range and is facilitated by a greater degree of timing control in the combustion process. The

C4.4 genset features an integral oil cooler inside the cylinder block, so that no external hoses or pipe work are required. Long service intervals of 500 hours also contribute to reduced maintenance needs.

Anti-vibration mounts connected to the engine drip tray and a steel base are designed to provide significant noise and vibration reduction. Adding an optional sound-attenuated enclosure (available in the second quarter of 2005) can further reduce noise. A standard electronically governed fuel injection pump is designed to provide the genset with superior load acceptance. When loads change, the unit maintains power and delivers it smoothly for uninterrupted operation of connect- ed components. For example, lights operated by a C4.4 genset do not flicker when genset load demands increase.

The C4.4 genset features an in-line, four-stroke diesel engine with a crossflow cylinder head. It has a 4.4-liter (269 cu. in.) displacement and is available in nat- urally aspirated, turbocharged and turbocharged aftercooled options. In addition, the genset meets EPA Tier 2 emission standards at its 1800 rpm ratings and Central

Commission for Navigation of the Rhine (CCNR) standards at its 1500 rpm rat- ings.

Circle 51on Reader Service Card

Circle 318 on Reader Service Card

Propulsion Update

Table 1. C4.4 Genset Ratings and Fuel Consumption

Genset Ratings ekW at 0.8 pf KV·A Aspiration rpm U.S. gph L/h 60 Hertz 44.0 55.0 NA 1800 3.4 13 60 Hertz 58.0 72.0 T 1800 4.46 16.9 60 Hertz 78.0 98.0 TA 1800 5.8 22 50 Hertz 38.0 47.0 NA 1500 2.9 11 50 Hertz 51.0 64.0 T 1500 3.9 14.8 50 Hertz 71.0 88.75 TA 1500 4.9 18.6 50 Hertz 86.0 107.0 TA 1500 6.5 24.6 ekW - electrical kilowatts

T - turbocharged

L/h - liters per hour

TA - turbocharged aftercooled

NA - naturally aspirated

U.S. gph - U.S. gallons per hour pf - power factor

Genset Modeled After

Cat 3054, 3056 Units

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