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DEUTZ AG, co-founded in 1864 by Nicolaus August Otto, the inventor of the four-stroke cycle engine, has developed the new 2013 engine for commercial vehicles on the basis of the tried and tested 1012 and 1013 series. With 4 and 6 cylinder models, the engine covers the power range between 100 and 190 kW. At the time of their introduction to the market, the engines will meet the exhaust emission legislation of EURO III and incorporate the potential for EURO IV. Further engineering targets were: Compactness favourable power/cost relation Low weight Low fuel consumption and Low noise level The targeted standards have been reached, for instance, through the application of modern computation and simulation methods. The design configuration of the engines will be described and it will be outlined by examples how the engineering targets have been reached. Particular emphasis will be on measures for noise emission reduction. The 4-valve cylinder head will be described in detail.