P&O orders IMO Tier II Common Rail Engine Jari Kujala of Aker Yards, Finland (right) and Prof Wolfram Lausch of MAN Diesel seal a major contract for propulsion and onboard power equipment centring on MAN Diesel type 48/60CR and 21/31 engines. The IMO Tier II type 48/60CR common rail engine was one of MAN Diesel's major product launches at SMM 2008. MAN Diesel has recently concluded a major order for the first IMO Tier II version of its new 48/60CR four stroke engine with common rail fuel injection. The contract covers the main propulsion and onboard power supply equipment for two large ro-pax ferries being built by Aker Yards for P&O. UK based P&O Ferries is thus anticipating the 2011 implementation of the second stage of the IMO MARPOL 73/78 Annex VI emissions regulations. Worth over Eur 35 million (US$44.6 million), the contract, centring on the 48/60CR was signed by Jari Kujala, Purchasing Manager, STX Rauma, Finland and Prof Wolfram Lausch, Senior Vice President at the MAN Diesel Marine Medium Speed Business Unit. For each of the ro-pax vessels, MAN Diesel will supply four inline seven cylinder type 7L48/60CR main engines, each rated 7,600kW at 500rpm and four gensets based on inline seven cylinder type 7L 21/31 engines, each rated 1,463kWe at 1,000rpm. The scope-of-supply is completed by two double input / single output shaft reduction gears and two controllable pitch propellers per ship. The gears will be supplied by MAN subsidiary Renk, and the propellers by the MAN Diesel works in Frederikshavn, Denmark. "P&O has chosen common rail diesels from MAN Diesel due to their inherent reliability and the scope to optimise combustion under all operating conditions and especially at part load," noted Steve Morant, Project Manager New Build of P&O Ferries, while discussing the background to the contract. As well as the propulsion equipment ordered, for the two ferries, the contract also provides an option for the same scopes-of-supply for two further ro-pax vessels. The 48/60CR is the third engine in the MAN Diesel four-stroke range to be equipped with common rail fuel injection technology and at 1,200kW per cylinder, the most powerful. With inline 6, 7, 8 and 9 cylinder and 12, 14, 16 and 18 cylinder vee versions, the 48/60CR's overall power range of 7,200 to 21,600kW at 500 or 514 rpm ideally complements the 3,360 to 11,200kW of the 32/44CR common rail engine announced by MAN Diesel in 2006. MAN Diesel Common Rail System The MAN Diesel common rail injection system is modular with pressure accumulators subdivided into a series of segments, each serving one or two cylinders. As a result, pressure fluctuations in the system are reduced and rational use made of available space. On the 48/60CR the solenoid injection control valves are located on the segmented rails and connected to standard, pressure controlled injectors. No servo assistance of injector opening is required. This arrangement keeps sensitive components away from the hot cylinder heads and promotes retrofitting, since identical injectors are used on both the 48/60B and the 48/60CR. The rails are pressurised by a reduced number of high pressure pumps occupying the same bores as the standard injection pumps and actuated by a modified injection camshaft. The use of at least three high pressure pumps on every engine ensures that emergency operation is possible in the event of the failure of one pump For further information contact: MAN Diesel, Germany PH: +49 821 3220 FX: +49 821 322 33 82 Email: mandiesel-de@mandiesel.com Web: www.manbw.com
