Open AccessPressure Control Strategy and Simulation of High Pressure Common Rail System
Author(s) -
Dong Wang,
Zhenyu Xu,
Chang Su,
Jianhua Hu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1624/2/022061
Subject(s) - nozzle , pressure control , range (aeronautics) , mechanics , pressure regulator , control valves , control theory (sociology) , interval (graph theory) , surge , pressure head , engineering , mechanical engineering , computer science , control (management) , physics , mathematics , electrical engineering , aerospace engineering , combinatorics , artificial intelligence
Aiming at the control of the pressure wave of the high pressure tubing, considering the different design of the pressure reducing valve, two control strategies of the pressure reducing valve are discussed, and the problems to be noted when designing the control strategy are proposed. First, the actual high pressure common rail system is reasonably simplified as the “pump-nozzle-pipe” system, then based on the relevant theory (fluid flow formula, mass conservation law and relationship between fuel density and pressure), a mathematical model is established to determine the cam angular velocity, opening time and period and threshold of pressure reducing valve, and injection interval of nozzle, these parameters have a great influence on the pressure wave, and finally using the orthogonal test method to explore the influence of these parameters on the pressure wave by computer simulation. The research shows that only the injection interval of nozzle affects the size of the pressure wave range, other parameters only affects the pressure value at the time of stability. The larger the injection interval of nozzle, the smaller the size of pressure wave range. Therefore, when designing the control strategy, the injection interval of nozzle should be increased.