Simulation Of Operating Characteristics Of Electronic Control Unit Pump Fuel System And Its Electromagnetic Control Valve

With the energy crisis and the increasingly stringent emissions regulations, electronic control diesel engine is the inevitable development trend of modern diesel engines. The electronic control unit pump (EUP) fuel system as one of the main fuel system provides an effective way to meet the economic engine. It includes electric, magnetic, mechanical and hydraulic field and demands increasing injection pressure and fuel quantity, the solenoid control valve as core components of the fuel system, the electromagnetic properties, fast-response and flow characteristics directly affects the performance of the entire system. The main research works in the paper are as follows:First, carry out the liquid force characteristics simulation research of EUP fuel system through AMESim. Overall liquid force simulation module is established of Electric control unit pump fuel system and complete model calibration, guaranting model calculation precision; Analyse injection characteristics of feature parameters including the fuel system pump module, the electromagnetic control valve module, the tubing module and the injector module; Meanwhile analysis injection characteristics effects of run parameter to injection characteristics; Obtain sensitive degree of each parameter on injection characteristics; Conduct a full plane of fuel volatility analysis; Provide a reference for optimization and matching of Electric control unit pump fuel system.Second, carry out the Electric control unit pump fuel system static magnetic characteristics research. The3D static magnetic field solving finite element model of solenoid valve is established in Ansofl environment. The accuracy of the model is validated by comparing to the experiment results and the electromagnetic force deviation is about9%. Reveal magnetic saturated phenomenon in the conversion of electromagnetic and magnetic field distribution characteristics; The parameters change of iron core, winding, armature and assembly; Research control parameter on static magnetic and Eddy effects loss; All condition plane electromagnetic force is analyzed for quantitative analysis; Obtain the key effect factors of electromagnetic force.Third, carry out the electromagnetic control valve work process and the response characteristics optimization analysis. Reveal instant response characteristics such as electromagnetic force, magnetic pass, armature displacement and the magnetic field distribution characteristics; The parameters change of spring preload, spring stiffness, coil turns, moving parts mass and the valve core lift on the influence of the work process have been studied by transient simulation model:Through orthogonal analysis on electromagnetic valve response characteristics for optimization, get key influencing factor and optimized combination parameter of electromagnetic control valve for transient characteristics. It is concluded that the closing time for solenoid valve is affected by coil turns, followed by spring preload.Finally, carry out the instant flow and the empty characteristics research of fluid around the cone valve on different valve core liters condition. The three dimensional instant state flow field model is established, using UDF defines valve core movement, research on pressure distribution, speed distribution, export quality flow rate and Cavitation characteristics on different control valve liters. It comes to that, the greater valve lift is, the better flow characteristics. When valve lift is greater than0.18mm, there is less influence on cavitation and flow capacity.