New methodology for in-cylinder pressure analysis in direct injection diesel engines—application to combustion noise

摘要: The objective of this paper is to present a new methodology for the analysis in-cylinder pressure in direct injection (DI) diesel engines. Indeed, some applications, traditional study total shown be insufficient and proposed technique intended an alternative more efficient tool, since it may provide better understanding physical mechanisms. main idea decompose evolution according three phenomena taking place during engine operation: pseudo-motored, combustion resonance excitation. In order validate method, applied noise analysis. Actually, process DI engines considered as important source noise, approach mainly based on interpretation overall spectral levels both radiated obtained from Fourier However, has been unable describe all relevant aspects problem, whereas results decomposition exhibit fair qualitative correlation between issues. Further development could useful tool optimal strategies fulfilling not only performance considerations but also sound quality requirements