Diesel Engine Electronic Control Technology and the development of the electrical control system similar to gasoline. Since the 1980s began to enter the market in Hyundai Motor Diesel Engine Electronic Control System With control of the project is also growing, control tasks from simple to complex, until the all-round control. For example, the early electronic-controlled fuel injection system used a "position control", maintaining the traditional pulse of high pressure fuel supply principle, only through a computer at the core of the control unit servo control institutions and change the fuel adjustment rack ( In-Line pump) or oil-conditioning Hua Tao (VE-distribution pump), the location of fuel pump to adjust the cycle for the (jet) fuel. However, due to servo institutions to implement the frequency response slow, low-frequency control, control accuracy of instability, after nearly 10 years of development, to the early 1990s, "Time control" electronically controlled fuel-injection system developed, using a powerful new high-speed Electromagnetic valve to replace the traditional oil-conditioning rack (inline pump) or oil-conditioning Hua Tao (VE-distribution pump), the high-pressure fuel directly to digital high-frequency adjustment, the electromagnetic valve closed by the time and duration of closure Decision cycle for the (jet) and for oil (spray) when the oil is. Nevertheless, this "time control" electronically controlled fuel-injection system has remained the traditional pulse of high pressure fuel supply principle. Until the mid-1990s, a new electronically controlled common-rail fuel-injection system available, to abandon the traditional pulse of high pressure fuel supply principle, a "time - pressure control" type of fuel metering principle, to the public through the hydraulic oil in the track Continuous control of the cylinder fuel injection process and the electromagnetic valve control to achieve a combination of the cycle for the (jet) fuel control, only to the engine electronically controlled fuel injection technology has entered a new stage of development.