摘要：With the aim of reducing the cost of developing internal combustion engines,while at the same time investigating different geometries,layouts and fuels,3D-CFD-CHT simulations represent an indispensable part for the development of new *** tools are increasingly used by manufacturers,as a screening process before building the first *** paper presents an innovative methodology for virtual engine *** 3D-CFD tool QuickSim,developed at FKFS,allows both a significant reduction in computation time and an extension of the simulated domain for complete engine *** is possible thanks to a combination of coarse meshes and self-developed internal combustion engine models,which simultaneously ensure high *** present work demonstrates the capabilities of this innovative methodology for the design and optimization of different engines and fuels with the goal of achieving the highest possible combustion efficiencies and pollutant *** analysis focuses on the influence of different fuels such as hydrogen,methanol,synthetic gasolines and methane on different engine geometries,in combination with suitable injection and ignition systems,including passive and active *** operations as well as knock reduction are discussed,particularly for methane and hydrogen ***,it is shown how depending on the chosen fuel,an appropriate ad-hoc engine layout can be designed to increase the indicated efficiency of the respective engines.