The paper is a contribution to the discussion about a suitable future engine architecture, which has to cope with two contrary demands: the high mechanical and thermal loads in the engine and the need for a cost efficient, light weight engine design. Based on combustion related requirements of future emission legislation and expected performance requirements, a possible scenario of engine types and displacements is described. Features of a proposed bottom and top end concept — such as liner and crankcase concept, cylinder head bolt pattern, cylinder head concept, and suitable materials — are discussed, with the target to define a solution especially capable of high cylinder peak pressures and cost efficient at the same time.

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