Performance Research And Development Of Electronic Unit Pump On Marine Diesel Engine

With the decreasing of oil resources and the strictness of emissions regulations, it hashigher request of diesel engine performance improvement, but also promoted the developmentof the technology of diesel engine. By using electronic control technology has become animportant research and development direction of the marine diesel engines that it has the maintechniques of improving diesel engine performance. As a core component of modern dieselengine, electronic fuel injection system has great influence on diesel engine performance.Diesel electronic unit pump(EUP) fuel injection system enjoys the advantages of simplestructure, high reliability and for existing diesel engine fuel system modification or upgradeeasily and low demand for quality of oil, thus is one of the effective ways of upgradingmechanical injection type diesel engine of our country.In accordance with the characteristics of the marine diesel engine fuel system,this paperdesigns marine electronic unit pump fuel injection system, and has a In-depth research for thefuel injection performance of electronic unit pump fuel injection system and the performanceof high-speed solenoid valve, and develop the electronic system. Through the calibration testson TBD234V8diesel engine, emissions can meet IMO TierⅡemission regulations under thepremise of improve diesel engine economy and improve speed governing performance. Thispaper mainly completed the following several aspects of the research work.The high speed solenoid valve is one of the key actuators in the electronic unit pump fuelinjection system whose the response of speed and driving capacity performances affectdirectly the flexibility of the system injection control performance.In accordance with thehigh speed solenoid valve of marine electronic unit pump,this paper build the mathematicalsimulation model on calculating the3D static and instantaneous magnetic field in Ansoftenvironment.Using the method of modeling simulation and analysis in multi-physical fieldsand the analysis method of response surface central synthesis experiment and design,it isconcluded that the rules and degree of the performance of high-speed solenoid valves affectedby the full process plane within key factors and interaction, and reveals the static electromagnetic force and transient response time not only relevance to a factors, but also effects bythe secondary factors complex interaction, for a strong support for the optimization design ofhigh-speed solenoid valve. The performance of fuel injection and cycle fuel injection quantity fluctuation of EUPare important factors which affect the stability of work and high efficiency clean combustionof diesel engine. In this paper, a method of combining the experiment analysis and numericalsimulation under the AMESim environment is used, analyzes the key factors which affect theperformance of fuel injection system, reveals the influence law of the key factors to injectionperformance in the range of full operating conditions,by means of correlation analysis methoddrawing the influence law of the interaction of primary and secondary of key factors toinjection performance. Through the quantitative analysis of cycle fuel injection quantityfluctuation in the range of full operating conditions, reveals the influence law of the keyfactors to the variation of cycle fuel injection quantity fluctuation, and the key parameterswhich affect the cycle fuel injection quantity fluctuation were obtained. Providing atheoretical guidance for the design, development and stability control of cycle fuel injectionquantity of EUP fuel injection system.Using the design method of hardware modular, software hierarchical package and dataarchitecture based on calibration parameters, developed the electronic control unit of EUPsystem of marine diesel engine and realized optimal control and matching calibration ofelectronic unit pump diesel engine. The experiment had been carried out on test-bed andTBD234V8marine diesel engine.The experimental results show that NOXemission are7.02g/kW h and7.05g/kW h in E3and D2conditions on the premise of satisfying theeconomy and speed performance of diesel engine and meet the IMO TierⅡ emissionsrequirements.