passing through assembly, final painting and dyno testing, the engine was shipped to caterpillar dealer NC Machinery Co. for a pleasure craft application. The center will eventually house the design, development, manufacture and test facilities for marine products ranging from the C7 to the C32 — the latest of Caterpillar’s propulsion engines. Once the MCOE achieves full operation in 2008, production capacity will be about 30 marine engines a day.

The MCOE process begins with an incomplete engine received from Greenville’s Medium-Duty Engine Center (C7, C9), the Mossville, Illinois, U.S.A., Engine Center (C12, C15 and C18)and Griffin, Georgia, U.S.A., Engine Center (C32).

The long blocks will have undergone partial assembly to spec to help ensure a fit with the engine’s nucleus, such as crankshaft, connecting rods, pistons, liners and cylinder head. Once the MCOE achieves full operation in 2008,production capacity will be about 30 marine engines a day.

Emission Control

Caterpillar Marine has also achieved DNV Clean Design notation for a number of high-speed marine engine families. These engines were jointly developed to meet both the DNV Clean Design, EU Stage 3a Inland Waterway (EU 97/68/EC) and U.S. EPA Tier 2 Commercial Marine (40 CFR 94) requirements.

Available with DNV Clean Design notation are Cat 3500C propulsion, C32 ACERT propulsion and auxiliary, C12 ACERT propulsion, and C9 ACERT propulsion and auxiliary. All these engine families exceed the requirements of DNV Clean Design with a further NOx reduction of at least 15% on average.

DNV Clean Design notation is also available for the latest generation of MaK medium-speed marine engines, the M20C, M32C, M43C and the new M 25 C. Environmental Class is the common name for DNV’s voluntary class notations Clean and Clean Design for ships, which are designed, built and operated to give additional protection to the environment. With respect to engine design, DNV Clean certification requires reduction of NOx emissions below current IMO Marpol limits.

A pleasure-craft highlight for Caterpillar Marine was Horizon Motor Yachts UK Ltd. completing a technology demonstration tour along the southern coast of England using a “Horizon 20M” motor yacht, equipped with twin Cat C18 engines running on B30 blend biodiesel. Horizon Motor Yachts UK set out to leverage biodiesel in a production boat design and, consequently, neither the boat nor the engine received any modifications.

Apart from running on regular diesel, the Cat C18 engine is also specified to burn B30 biodiesel, consisting of 30% biodiesel and 70% regular mineral diesel. To comply with Caterpillar’s fuel specifications the biodiesel and mineral components of the fuel have to meet EU EN14214 and EN590, respectively (ASTM D6751 and ASTM D975 for the U.S.). In the case of Horizon, the fuel is blended prior to fueling, as opposed to 100% biodiesel, which is subsequently added to regular mineral diesel already in the tank. This pre-blending ensures that the fuel being fed into the engines is B30 at all times.

According to Horizon Motor Yachts UK, the vessel ran “flawlessly” throughout the tour — with the engines providing the same performance as with regular mineral diesel and the yacht matched its previous best top speed of 24.4 knots. There was virtually no visible smoke even when starting the engines from cold.

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