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Computer-aided engineering (CAE) simulation and calculation is a new and effective way to do research on engine performance. A 1D simulation model of an engine fueled by biodiesel was established, and its economic performance was simulated. Then, an engine bench test was carried out to review the simulation results. The simulation and test results showed that the model established by the AVL BOOST software can calculate the biodiesel engine's performance accurately, thereby making it an effective way to study engine performance conveniently.

To explore the maximum of energy saving potential of hybrid loader and analyze the energy-saving ways of hybrid loader, the researcher took use of AMEsim software to build hybrid loader model. The author simulated on the energy saving ways and made the prototype test at the same time. In the end, with the quantitative approaches, the energy saving potential of energy saving ways were shown in the end.

In order to have a depth research for the combustion process and the status of the engine emissions, it is necessary to develop a excellent combustion analysis system. The data collection, data processing, data computing and other display functions were realized by the self-developed combustion analysis system software, and some relative analyses of cylinder dynamic combustion were done. At the same time, it is so important for designers have an optimization of engine if they use the P-Φ indicator diagrams. Pmax indicator diagrams, air-fuel ratio(ξ)and fuel consumption variation data and so on. The test system for an internal engine combustion analysis through continuous testing and use, is feasible. No doubt, Better user interface and lower costs of this combustion system is pretty good for tester analysis the related data. Designers could facilitate the continuous development and utilization, so it has a certain value in engineering.

Even though AI technology is a relatively new discipline, many of its concepts have already found practical applications. Expert systems, in particular, have made significant contributions to technologies in such fields as business, medicine, engineering design, chemistry, and particle physics.

This paper describes an expert system developed to aid mechanical engineering designers in the preliminary design of variable-stroke internal-combustion engines. Variable-stroke engines are more economical in fuel consumption but their design is particularly difficult to accomplish. With the traditional design approach, synthesizing the mechanisms for the design is rather difficult and evaluating the mechanisms is an even more cumbersome and time-consuming effort. Our expert system assists the designer by generating and evaluating a large number of design alternatives represented in the form of graphs. Through the application of structural and design rules obtained from design experts to the graphs, good quality preliminary design configurations of the engines are promptly deduced. This approach can also be used in designing other types of mechanisms.