At present, the international new electronically controlled high-pressure fuel injection system is mainly divided into two categories: (1) Electronic pulse of high pressure fuel injection pump system, (2) electronically controlled common rail high pressure fuel injection system.

Electronic pulse of high pressure fuel injection pump system is the main characteristics: cam-driven high-pressure fuel injection pump to achieve the establishment of processes and fuel injection process, these two processes on the timing can not be completely separated by high-speed electromagnetic valve bypass China Flow Control to replace the traditional mechanical-discharge control, measurement of fuel and time control. Mainly include two types: (1) electronic control pumps - high-pressure fuel injection system of nozzles (2) Electronic Control Unit Pump high pressure fuel injection system. At present, two fuel injection system the maximum injection pressure can reach more than 150 MPa. Electronic pulse of high pressure fuel injection pump system although there are many advantages, but also inherits the traditional fuel injection system of some shortcomings, mainly due to: Diesel fuel injection pressure to be the speed limit, at low speed, low pressure fuel injection .

Electronically controlled high-pressure common-rail fuel injection system is the main features: high-pressure fuel will be established process and the timing of fuel injection process is completely separated by the fuel pressure measurement - time control mode, can be divided into two types: (1), Control of high-pressure common-rail fuel injection system, (2) electronic control of pressure Common Rail fuel injection system.

Electronically controlled high-pressure common-rail fuel injection system for the common rail high pressure for oil, fuel, only depends on the common rail injection pressure in the fuel, oil pressure, high-speed electromagnetic valve can be used to achieve volume injection, injection pressure, injection timing and Injection rate of flexible control. Its typical representatives: (1) Japan's Denso developed by ECD - U2 electronically controlled high-pressure common-rail fuel injection system-then the maximum injection pressure has reached 120 MPa, and have the potential to reach the 150 MPa, using a two three links High-speed electromagnetic valve (TWV). (2) Germany BOSCH companies in the 1990s by the development of the electronic control of high-pressure common-rail fuel injection system, then the largest injection pressure up to 140 MPa, then reached 160 MPa or even 170 MPa, using a two-two high-speed electromagnetic valve.

Electronic Control of pressure common-rail fuel injection system of the Common Rail Road for the oil pressure in the fuel (or oil), depending on the common rail injection pressure fuel (or oil) pressure and control the power of electromagnetic valve time. Using high-speed electromagnetic valve fuel injection volume can be realized, the injection pressure, injection timing of flexible control and the inadequacies of the lies: electricity controlled manner difficult to achieve injection rate shape control and pre-spray, usually through mechanical control methods to achieve. Its typical representatives: (1) U.S. Caterpillar development of the HEUI of electronically controlled fuel injection system, using common rail, oil pressure in the fuel oil to drive the booster organizations. The largest injection pressure to reach 150MPa. (2) developed by the United States BKM Servojet of electronically controlled fuel injection system, using common rail, oil pressure in the fuel to drive the fuel booster organizations. The largest injection pressure over 150 MPa, Servojet of electronically controlled fuel injection system can be divided into SSI - 1 system and SSI - 2, difference is that: SSI - 1-pressure system with a nozzle, and SSI - 2 system is the traditional structure Nozzle.