Abstract
The system of engine is composed of multi-subsystems and multidisciplinary; to improve engine's fuel economy, synergy and coupling between disciplinary is the key point to research, multi-disciplinary design optimization (MDO) is a new means to explore entire engine system. A number of disciplines are involved in the engine system, they mutually interact. MDO is a method for the design of complex engineering systems and subsystems that coherently exploits the synergism of mutually interacting phenomena. MDO provides the integration of design workflow and self-executing in analysis, the analysis of a number of disciplines are integrated into the shared environment and MDO gives full consideration on interdisciplinary coupling as well as the interaction and impact between subsystems. The integration platform simplifies the process and provides optimization arithmetic library. The MDO is applied to the system of gasoline engine, the optimal system helps improve power and save the fuel consumption obviously, the relationship of variables was studied by the response surface model. The MDO will play more important role to improve engine's energy efficiency. (4 pages)
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