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| Posted: Mon 9:38, 10 Jan 2011 Post subject: mbt schuhe koeln High Pressure Common Rail Diesel |
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| High Pressure Common Rail Diesel Fuel Injection
Z over the role of holes in the control piston, the nozzle off; when the solenoid valve power, the amount of hole A is opened, the control room quickly lower the pressure, the control piston rises, start injector fuel injection; when the solenoid valve is closed, control room of the pressure rise, the control piston down off the injector fuel injection process to complete. Control the shape of injection required to optimize the design of its reasonable fuel injection to achieve a predetermined shape. Volume determines the size of the control room when the valve opens the sensitivity of the control room volume is too large, the end of the injector needle is not fast off the oil, so that poor fuel atomization late; control room volume is too small to pin provide adequate and effective valve stroke,mbt schuhe koeln, the injection process to increase the flow resistance. Therefore, the volume of the control room should be based on the maximum amount of fuel injection models a reasonable choice. Control orifice A, z the size of the nozzle opening and closing speed and fuel injection process plays a decisive impact. Double-orifice valve structure of the three key oil into the hole, back to the oil hole and the control room, their structure and size of the injector fuel injection performance impact is huge. Back to the hole and into the fuel oil flow rate difference between the hole and determine the volume of the nozzle needle control room opening speed, closing speed of the nozzle needle hole into the oil flow rate and volume of the control room decision . Hole into the fuel injector needle valve should be designed so that the closing speed sufficient to reduce the post-atomized spray nozzle bad part. In addition, the minimum injection pressure depends on the nozzle back into the oil hole and oil flow rate and control of hole piston face area. In determining the amount of oil into this hole, back to the oil holes and after structure size of the control room to determine the stability of the nozzle needle fully open, the shortest injection process, while also determine the stability of the minimum fuel injection nozzle reduction in the amount of control room volume can make the response faster needle,ghd stijltang, so that the temperature of the fuel injector fuel injection quantity of smaller. Can not be unlimited, but reduced the volume of the control room, it should be able to ensure that the nozzle needle lift, to make the valve fully open. Two control determines the amount of holes in the dynamic pressure control room to determine the movement of the needle. By carefully adjusting the flow of these two factors the amount of holes, can produce the desired injection rate. Solenoid valve for the injector, common-rail system requirements because it has enough open rate, taking into account the pre-injection diesel engine performance is improved. 3 Key Technologies 3.1 software technology is the essence of ECU software development process in technology companies, enterprises in a variety of work on a variety of engine testing under the state acquired the knowledge and experience, is a continuous improvement and refinement process. ECU software is first detected engine speed and throttle opening and other parameters, and then entered into the computer,moncler sito ufficiale, the formation of MAP. In the work, the engine real-time analysis and processing parameters and MAP, issued instructions to the servo loop control. 3.2 As the injection pressure sensor technology continues to improve, and other related technologies, demand more accuracy and response speed of the new type of intelligent sensors to meet the requirements of technical progress. 4 summarizes the high-pressure common rail electronic fuel injection technology makes the appearance of the development of diesel engine received a new life, which not only preserved the traditional diesel excellent fuel economy and performance, but also further reduce the NO, particulate matter (PM) and soot emissions, make it more energy efficient, more environmentally friendly emissions, in terms of performance far beyond traditional gasoline engines. At the same time, the technology also has great potential, further research in the following areas: increased injection pressure; reduce nozzle diameter; increase the number of nozzle; further development of the piezoelectric fuel injector; development of new smart sensors ; further resolve the common rail pressure fluctuation; strengthen the control model and algorithm; enhance safety protection, fault diagnosis and operational capabilities of the emergency; further optimize the system to match; continuously improve the system reliability and longevity; reduce costs. In short, the Common Rail fuel injection system involves the further development and optimization of actuators,p90x workout schedule, sensors, computers and control technology, is a comprehensive new technology,columbia sportswear outlet, only in the development of continuous improvement. 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