Casting simulation tool ADSTEFAN is useful to design casting technology of complicated iron castings.Based on the function of solidification analysis,special methods were taken to carry out the prediction and optimiza...Casting simulation tool ADSTEFAN is useful to design casting technology of complicated iron castings.Based on the function of solidification analysis,special methods were taken to carry out the prediction and optimization of shake-out timing for large sized iron castings.It has been proved that these analyses are effective to iron casting production.During the research of cast iron semi-solid process,to predict and control the influence of inclined cooling plate on flow and heat transmission of molten iron,the basis of analysis model has been built in this study.Flow field simulation considering temperature field was carried out for further research and satisfied with the practical production.展开更多
We focus on the friction loss measurement and reduction of the timing belt guide plates of a fourcylinder gasoline engine. To minimize the friction loss caused by the dynamic friction of the guide plates during timing...We focus on the friction loss measurement and reduction of the timing belt guide plates of a fourcylinder gasoline engine. To minimize the friction loss caused by the dynamic friction of the guide plates during timing belt motion and improve the efficiency of the internal combustion engine(ICE), we adopt four different plastic materials in fabricating the guide plates. With controlled engine boundary conditions and operational modes, an AVL electric dynamometer is used to measure the output of the engine. The results indicate that selecting polytetrafluoroethylene(PTFE) as the additive in fabricating the guide plates can effectively reduce the friction loss, so that the output torque and output power of the engine can be improved, thus reducing fuel consumptions. This work also has positive impact on the efficiency optimization of similar ICEs.展开更多
文摘Casting simulation tool ADSTEFAN is useful to design casting technology of complicated iron castings.Based on the function of solidification analysis,special methods were taken to carry out the prediction and optimization of shake-out timing for large sized iron castings.It has been proved that these analyses are effective to iron casting production.During the research of cast iron semi-solid process,to predict and control the influence of inclined cooling plate on flow and heat transmission of molten iron,the basis of analysis model has been built in this study.Flow field simulation considering temperature field was carried out for further research and satisfied with the practical production.
基金the Shanghai Automotive Industry Science and Technology Development Foundation(No.1614)
文摘We focus on the friction loss measurement and reduction of the timing belt guide plates of a fourcylinder gasoline engine. To minimize the friction loss caused by the dynamic friction of the guide plates during timing belt motion and improve the efficiency of the internal combustion engine(ICE), we adopt four different plastic materials in fabricating the guide plates. With controlled engine boundary conditions and operational modes, an AVL electric dynamometer is used to measure the output of the engine. The results indicate that selecting polytetrafluoroethylene(PTFE) as the additive in fabricating the guide plates can effectively reduce the friction loss, so that the output torque and output power of the engine can be improved, thus reducing fuel consumptions. This work also has positive impact on the efficiency optimization of similar ICEs.
