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Articles by Zhang Jundong
Total Records ( 2 ) for Zhang Jundong
  Shen Haosheng , Zhang Jundong and Cao Hui
  To better improve the ability and skill of operating marine electronically controlled diesel engine for marine engineers, chosen 7RT-FLEX60C diesel engine as the study object, a kind of visualization simulation system is developed for its fuel common rail system. The working principle of fuel common rail system is analyzed and its mathematical model is established based on the continuity equation and motion equation of fluid mechanics, the mathematical model is simulated and analyzed by applying MATLAB/Simulink. Based on the mathematical model, the 2D visualization simulation system is developed by using high-level computer programming language visual C# which can provide man machine interactive function and main parameters are real-time refreshed based on the mathematical model. The results showed that the visualization simulation system can be used to train marine engineers effectively and systematically.
  Cao Hui , Jia Baozhu and Zhang Jundong
  In order to observe the dynamic performance of servo oil Common Rail System of marine intelligent diesel engine, 7RT-flex 60C diesel engine is selected as the research object to analyze the characteristics of common rail system. Based on the continuity equation and the motion equation of the fluid mechanics, the mathematical models with blocks are established for servo pumps, collectors, common rail of servo oil and vent control module, etc. All the mathematical models are calculated by MATLAB/Simulink for the rail pressure of collector and servo oil common rail, servo pump plunger stroke, plunger cavity pressure and flow, front chamber pressure and the displacement of piston, exhaust valve lift, etc. to achieve the dynamic simulation and parameter analysis. Finally, the simulation results of curve and data are compared with the basic characteristics of actual servo oil common rail system to verify the correctness of the model.
 
 
 
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