In 1985, the engine series 1163 with a maximum power of 7400 kW was introduced into the market. The engine had been developed for military applications and is unrivaled both with regard to its power-to-weight ratio as well as its space-to-power ratio. The two-stage sequential turbocharging with intercooling allows for maximum power concentration and a highly compact design while at the same time permitting a wide performance map. These characteristics turned it into the preferred engine of the worlds most renowned navies. In addition, the use of Series 1163 engines in megayachts and fast ferries highlights the versatility of this engine. To ensure compliance with the IMO II emission regulations, a new version of the engine series 1163 will be introduced into the market: the build sample 04. The modernized version retains the key characteristics of the engine, i.e. power-to-weight ratio, wide performance map, reliability, engine dimensions and compliance with military requirements. The running gear as well as the turbocharging concept remain unchanged. New features for this engine series are a common rail injection system, state-of-the-art engine electronics as well as the use of the Miller cycle with optimized turbocharging. One of the major changes reducing emissions is the common rail injection system with eight high-pressure pumps on the 20 cylinder engine. It replaces the previous unit pump system. The significant increase in injection pressure from 1300 to 1800 bar resulted in a cleaner combustion with a lower emission of particulate matter. By means of pilot injection, the stress on the running gear can be kept at a low level despite the increased combustion requirements. To control the common rail injection system, new engine electronics were required. For the build sample 04 of the engine series 1163, the ADEC system used on MTU Series 4000 engines was developed further. All military requirements regarding EMC (electro-magnetic compatibility) are being complied with. Given the use of new technologies, the efficiency of the sequential turbocharging system was increased significantly. The Miller cycle results in an increase in charge-air pressure. The new build sample was developed in a SE process using the latest methods of design, calculation and testing. For the 12 cylinder, 16 cylinder and 20 cylinder engines of the build sample 04, the following characteristics/improvements were achieved compared to build sample 03: Emissions: Compliance with IMO II (NO(x)) and reduction of PM Charge-air pressure (abs.): Increase from 4.6 to 5.7 bar Total ETC efficiency: Increase by 8% Fuel consumption: Reduction by 10% in performance map This paper describes the key development steps.
Series 1163-04
2013
12 Seiten, 22 Bilder, 2 Tabellen, 7 Quellen
Conference paper
English
Automotive engineering | 2013
|Online Contents | 2011
Online Contents | 2011
Automotive engineering | 1976
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