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The new technology of common rail diesel engine electronic control system      2015-12-27

    Common rail type the new technology of electronically controlled fuel injection system is the inevitable trend in the development of modern automotive diesel engine
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As the world the rapid increase of city transportation vehicles, ships, diesel engine exhaust has become the main pollution sources of the earth's environment. Countries around the world have started to look for and take effective technical measures danapati move to reduce and control the emissions of pollutants. Common rail diesel engine electronic control fuel injection technology is a new technology of more successful control of pollution. Common rail electronically controlled fuel injection technology by common rail, directly or indirectly, to form a constant high pressure fuel, distributed to each fuel injector, and with the help of the integrated on each injector high-speed electromagnetic switch valve opening and closing, timing and quantitative control of injectors injection volume of oil to diesel engine combustion chamber, so as to ensure the combustion of diesel engine to achieve the best ratio and good atomization, and the best time to ignition, sufficient ignition energy and the least amount of pollution emissions. This new technology has now started to abroad to diesel powered cars put into use. This is the world's auto industry to meet the inevitable trend of increasingly stringent emissions standards.
elementsCommon rail diesel engine electronic control fuel injection technology is a new technology, because it integrates computer control technology, modern sensor detection technology and the advanced spray structure as a whole. The technology of the main features are: the use of advanced electronic control unit and is equipped with high-speed electromagnetic switch valve; By way of common rail fuel supply; The high-speed electromagnetic switch valve high frequency response, flexible control; Easy to transplant system structure, to adapt to a wide range. The technology research and development of hot is: solve the high pressure common rail system of constant pressure seal the title; Solve the high pressure common rail system, common rail pressure of small fluctuations caused by the fuel injection quantity uneven subject; To solve the MAP of the high pressure common rail system (3 d control data table) optimization subject; And solve the structure, the frequency response of electromagnetic switch valve key technology questions in the process of design and manufacture. Common rail fuel injection technology helps to reduce diesel engine exhaust emissions, and improve the comprehensive performance of noise, fuel consumption, etc; It in to the earth environmental protection at the same time, also will certainly to promote diesel engine industry, automobile industry and the development of related industries.
drive shaftCommon rail technology refers to the high pressure oil pump, pressure sensor and the closed-loop system is composed of ECU, the injection pressure and injection process completely separated from each other a way of oil supply, by the high pressure oil pump for tubing, high pressure fuel to the public through the oil pressure of the public drainage tube to realize accurate control, make the high-pressure tubing pressure size has nothing to do with the rotating speed of engine, can greatly reduce the pressure of diesel engine fuel supply along with the change of engine speed, thus reducing the defect of traditional diesel engine. ECU control injector fuel injection quantity, injection amount depends on the fuel rail pressure for tubing (public) and electromagnetic valve open time of right from wrong. Common rail electronically controlled fuel injection technology by common rail, directly or indirectly, to form a constant high pressure fuel, distributed to each fuel injector, and with the help of the integrated on each injector high-speed electromagnetic switch valve opening and closing, timing and quantitative control of injectors injection volume of oil to diesel engine combustion chamber, so as to ensure the combustion of diesel engine to achieve the best ratio and good atomization, and the best time to ignition, sufficient ignition energy and the least amount of pollution emissions. Common rail fuel injection device is developed in recent years and is thought to be one of the most ideal high-pressure fuel injection device. In a common rail pressure and injection respectively. Injection pressure can be up to 16 o MPa. The pressure storage and distributor rail by the catheter to the mouth. The controller last pulse injection signal conduction into the electromagnetic valve and a jet. Through the nozzle duration of storage pressure and open to adjust the volume of oil. At present, the device of all kinds of automotive diesel engine in Europe got a lot of use, and the experts think that this is a kind of can satisfy the future European Ⅳ injection device, euro V most growth potential. At the same time, reduce the nozzle hole diameter, increase the hole number decreasing orifice diameter, increase the hole number, can improve the fuel atomization and distribution uniformity, reduce the ignition lag, NO reduction and particle emissions.
injector nozzleJust in recent years the commercialization of common rail fuel injection system can provide high injection pressure, and there will not be uncontrollable abnormal injection, also can effectively reduce the noise and nox emissions. The application of common rail type high pressure fuel injection system is a revolution of the diesel engine technology. This new technology has now started to abroad to diesel powered cars put into use. This is the world's auto industry to meet the inevitable trend of increasingly stringent emissions standards.

The blundering, big noise and jet black smoke, an intuitive impression of diesel engine, combined with the structure of the diesel engine is more complex, many people have a lack of understanding of diesel engine, especially the lack of the understanding of modern advanced diesel engine, so diesel cars in some cities became the object of "limited", by discrimination. True after years of research and application of new technology, the present situation of the modern diesel engine has been compared with the past with yu, diesel cars is common in Europe, mercedes-benz, Volkswagen, BMW, Renault, Volvo Europe -- have used diesel engine models. After many years of research and application of modern advanced car generally adopts electronic control injection, common rail diesel engine and a turbocharged inter-cooled technology, in weight, noise, smoke, etc has made significant breakthrough, achieved the level of gasoline engine.
magnet valveIn electronic control injection is the main difference between diesel and gasoline engine, gasoline engine electronic control injection system is a control of air-fuel ratio (the proportion of gasoline and air), the electronic control injection system of diesel engine is by controlling the fuel injection time to adjust the size of the output, the diesel engine fuel injection control is made up of the engine speed and the accelerator pedal position (throttle lever position). Basic working principle is based on computer, therefore, into the speed sensor and throttle position sensor input signals, first calculate the basic injection amount, then according to the water temperature, inlet temperature and inlet pressure of the sensor signal is fixed, and again from control set of position sensor signal feedback correction, the optimum fuel injection quantity.

Electronically controlled diesel fuel injection system consists of sensors, ECU (computer) and actuators, etc. Its task is to the electronic control of fuel injection system, implementation of fuel injection quantity and injection timing with the operating conditions of real time control. Use the sensor such as speed, temperature, pressure, type real-time detecting parameters of synchronous in the computer, compared with the third store the values of the parameters, after processing calculation according to the optimal value of fuel pump, exhaust gas recirculation valve, such as preheating plug to control actuator, drive fuel injection system, the diesel engine operation state to achieve the best.
pencil nozzleWith the rapid increase of the world urban transportation vehicles, diesel engine exhaust has become main pollution sources of the earth's environment. Countries around the world have started to look for and take effective technical measures danapati move to reduce and control the emissions of pollutants. Common rail diesel engine electronic control fuel injection technology is a new technology of more successful control of pollution.

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