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An Optimization Study of Manufacturing Variation Effects on Diesel Injector Design with Emphasis on Emissions

Authors :
Zhijun Li
Dohoy Jung
Michael Kokkolaras
Panos Y. Papalambros
Dennis N. Assanis
Source :
SAE Technical Paper Series.
Publication Year :
2004
Publisher :
SAE International, 2004.

Abstract

This paper investigates the effects of manufacturing variations in fuel injectors on the engine performance with emphasis on emissions. The variations are taken into consideration within a Reliability-Based Design Optimization (RBDO) framework. A reduced version of Multi-Zone Diesel engine Simulation (MZDS), MZDS-lite, is used to enable the optimization study. The numerical noise of MZDS-lite prohibits the use of gradient-based optimization methods. Therefore, surrogate models are developed to filter out the noise and to reduce computational cost. Three multi-objective optimization problems are formulated, solved and compared: deterministic optimization using MZDS-lite, deterministic optimization using surrogate models and RBDO using surrogate models. The obtained results confirm that manufacturing variation effects must be taken into account in the early product development stages.

Details

ISSN :
01487191
Database :
OpenAIRE
Journal :
SAE Technical Paper Series
Accession number :
edsair.doi...........240edece7eba78180a9ed3de790d8058
Full Text :
https://doi.org/10.4271/2004-01-1560