The new MAN 175D high‑speed engine – synthesis of commercial and medium‑speed engine development

Packing the latest state-of-the-art technology into a minimum volume, the MAN 175D is characterized by clear-cut design: easy to commission, easy to operate, and easy to service. With 12, 16, and 20 cylinders and a power of up to 238 kW per cylinder, this high-performance marine engine is compact and modular with all auxiliaries attached.Inheriting its genes from both our successful commercial and medium speed engine tradition, the MAN 175D is robust and reliable by nature. Through innovation, it is designed to be a very efficient engine family. It is firstly used for yacht, fast patrol vessel and commercial marine applications.This work concerns the cutting edge development of this engine. It is focused on the synthesis of design, simulation and validation concepts from commercial and medium speed engines. Applications of this synthesis are discussed for major cranktrain parts including crankshaft and connecting rod.Finally, the latest experiences from testbed and field are presented.