Investigation of deviations in SI-engine behaviour due to manufacturing tolerances in cylinder heads

Abstract Cast engine components are experiencing ever tighter tolerance requirements and at the same time a more complex cast design. The geometries, some of which inaccessible, tested for quality assurance on basis relevant component characteristics, among other things. position check measures actual feature in spatial dimension. Information about alignment geometry combustion chamber cannot be derived from measurement methods applied. use three-dimensional measuring methods, e.g., imaging by computer tomography, can additionally record geometry. Further data this, serves to increase process reliability quality, within an entire batch. On one hand, cylinder head limits working space roof chamber, has significant influence charge movement, especially beginning intake flow, due ducts. account high demands modern gasoline engines with tumble paired Miller operation partial load, variable timing, etc., mixture formation is important efficient operation. Mixture air- wall-guided processes depends air duct injection. From point view production, guiding elementary development approach implementing sustainable production while ensuring properties. question as what influence, example, different dimensional tolerances size have To address this question, 3D simulations physical test bench measurements were performed. With variation above-mentioned geometries manufacturing tolerances, simulation results evaluated, analysed presented paper. manufacturing-relevant deviations early step recognised ways.