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The development of automotive diesel engine electronic control system      2015-12-27

    With the development of the modern automobile gasoline engine electronic control technology, the face is unable to avoid local and global environment and energy topics, hyundai motor have to using and developing the electronic control system of diesel engine, in order to maintain the sustainable development of automotive diesel engine, more give full play to the inherent advantages of diesel engine (low fuel consumption and CO2 emissions). While maintaining the excellent fuel economy of diesel engine, in order to meet the increasingly stringent emission regulations, in addition to reduce oil consumption, optimizing turbocharged technology and using advanced exhaust gas aftertreatment systems, the main also need to further improve the combustion process of diesel engine. And fuel injection system performance is a key link, the influence of the diesel engine combustion process using microcomputer control technology to improve combustion process used a lot of new technology, some new technology is associated with electronic control technology is not directly, but due to the better performance on the machine, still have indirect contact with electronic control technology.
    The development of the diesel engine electronic control technology is similar to gasoline engine electronic control system. Since the 80 s in the market of modern automotive diesel engine electronic control system is also with the increasing of control project, from simple to complex control tasks, until the full control. Early electronic control fuel injection system, for example, adopted the position control, keep the traditional principle of the pulse of high pressure oil supply, only through the microcomputer as the core of the control unit to control the position servo, change the fuel control rack (inline pump) or fuel control sliding sleeve (distribution of VE type pump), etc., of the fuel injection pump to adjust the cycle for oil (spray). But because of the position servo frequency response is slow, low frequency control, control accuracy is not stable, after nearly 10 years of development, to the early 90 s, "time control" type electronic control fuel injection system developed, adopted new high-speed powerful solenoid valve to replace the traditional fuel control rack (inline pump) or fuel control sliding sleeve (such as distribution of VE type pump), directly to digital, high frequency adjustment, high pressure fuel by the solenoid valve closed and closed time duration for decision cycle (spray) of oil and oil (spray) timing. Nevertheless, this kind of "time control" type electronic control fuel injection system is still keep the traditional principle of the pulse of high pressure oil supply. Until mid - 90 - s, a new kind of electronically controlled common rail fuel injection system, abandoned the traditional principle of the pulse of high pressure oil supply, adopted "time - pressure control" type fuel metering principle, through to the public in the fuel rail continuous control and each cylinder hydraulic solenoid valve to control the fuel injection process combining the way of control of the loop for oil (spray), to make diesel engine electronically controlled fuel injection technology in a new stage of development.
    Diesel engine electronic control technology is also facing many issues need to solve, especially when using high voltage electric control fuel injection diesel engine electronic control system of the capital account for nearly half of the capital engine. Even so, the only, widely used in the automotive diesel engine electronic control technology, to face the challenges of the increasingly stringent emission regulations. In recent years, the development momentum of electric control system of diesel engine is remarkable. In diesel cars in most of Europe as an example, the European road vehicle use multi-cylinder diesel engine from 2000 began to implement the euro iii emission standard, electronic control technology has been on the need to meet the euro iii standard diesel engine widely used, some research institutions and large manufacturers have already working on meet the euro 4 emission standard electronic control diesel engine, and now, the electronically controlled common rail system and electric control unit pump system application in multi-cylinder diesel engine has markedly increased.
    Research and development of modern diesel engine electronic control technology in our country is still in its infancy, at present is mainly concentrated in the diesel engine electronic control injection system on research and development. But with the development of social economy, more and more high to the requirement of environmental protection, the development of diesel engine electronic control system research and the corresponding products will certainly become a hot in the field of automotive diesel engine technology in our country, it will greatly promote the upgrading of China's automobile diesel engine product, to participate in international competition in the future not long period of time lay a solid foundation.