An Optimization Study of Manufacturing Variation Effects on Diesel Injector Design with Emphasis on Emissions 2004-01-1560
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.
Citation: Li, Z., Kokkolaras, M., Jung, D., Papalambros, P. et al., "An Optimization Study of Manufacturing Variation Effects on Diesel Injector Design with Emphasis on Emissions," SAE Technical Paper 2004-01-1560, 2004, https://doi.org/10.4271/2004-01-1560. Download Citation
Zhijun Li, Michael Kokkolaras, Dohoy Jung, Panos Y. Papalambros, Dennis N. Assanis
University of Michigan
SAE 2004 World Congress & Exhibition
Reliability and Robust Design in Automotive Engineering-SP-1844, SAE 2004 Transactions Journal of Materials and Manufacturing-V113-5