At present, the diesel engine has been widely adopted electronic control fuel injection system. Electronically controlled fuel injection diesel engine to achieve in two ways: First, the traditional fuel pump - tubing - nozzle system on the basis of only the governor, to improve fuel supply in advance for the electronic control and the other is a new concept of injection , The direct control nozzle.
1, electronically controlled in-line fuel pump

In-Line pump developed on the basis of the electronic fuel injection devices control most of its fuel injection quantity and injection timing control function or have only one function, some control system also has injection pressure and the injection rate, such as control functions.

Electronic fuel injection pump-line volume control devices for electronic control governor. Electronic fuel injection governor allows the speed of change of control easy to realize, but its response faster than a mechanical or hydraulic machinery governor much faster, so the scope is very broad. Electronic governor on the implementation of the different bodies can be divided into electronic governor (such as Japan DKK company's RED-type electronic governor, Germany Heinzmann company's E-type electronic governor and the United States Barber Colmann company's electronic governor , Etc.) and electronic hydraulic governor (such as Germany's Bosch-EDR governor, etc.).

Electronic fuel injection pump-line general adoption of electronic timing device hydraulic actuator, such as the German company MTU engine of the 880 series ECS system, Denso's ECD-P3-electro-hydraulic-and the United States are at Caterpillar's PEEC System.

Japan ZEXEL the TICS system uses plunger Huatao-time adjustment, by controlling the timing Huatao change the location of the pre-stroke piston oil supply, thus adjusting the oil supply time, and can also speed up with the cam to control compatible Injection rate and the injection pressure. Komatsu of Japan has developed a unique combination of variable pre-stroke piston KP2 1 of the fuel pump, Germany-Xu also developed a RP39, RP43-variable injection rate, sprayed Oil timing and control of fuel injection control Huatao-injection pump, its working principles and structure and ZEXEL the P-TICS system similar to, but also to a variable pre-stroke inline pump.

2, Electronic Control Unit Pump System

German Bosch company's Electronic Control Unit Pump (EUP) system that uses a shorter high-pressure pipeline, to achieve higher fuel injection pressure, the maximum injection pressure up to 1 60 MPa. The system uses high-speed electromagnetic valve control injection timing And injection volume.

3, electronically controlled distribution pump

Diesel Engine Electronic Control distribution of the fuel injection pump and injection timing of the general use of high-speed electromagnetic control valve, solenoid valve closing time corresponding to the injection timing, electromagnetic valve from opening to closing time to determine the volume of the fuel injector, such as Japan's Toyota Motor Corp. The ECD-type electronic control VE pump. German Audi car diesel engine company also used the electronic control the distribution pump. Stanadyne the United States the early 1990s, the development of the company's DS-based electronic control pumps used in the United States distribution of GM's 1994-6. 5L Turbocharged diesel engine, the maximum injection pressure pump up to 1 0 0 MPa, the newly developed electronic control distribution of RS-pump can achieve a higher injection pressure, peak injection pressure close to 1 40 MPa.

4, electronic control system pump nozzle

The future of truck diesel engine combustion system requirements 1 50 MPa around the maximum injection pressure to meet emissions and noise regulations. For this reason the world's major car companies in the development of high-voltage-controlled fuel injection system, the most representative Is the electronic control system pump nozzle. This device can be divided into machine-driven and has a two-pressure, the jet can reach very high pressure, fuel atomization to improve the quality and greatly reduce the diesel engine combustion system of the cylinder swirl The request can even be used without the swirl combustion system.
5, machine-driven electronic control system pump nozzle

At present the most complete development of the Electronic Control Unit Injector system is electronically controlled machine-driven pump nozzle systems, such as Detroit (De-troit) DDEC-engine company's electronic control pump nozzle, Germany's Bosch PDE2 7, and PDE2 8 - - Pump nozzle, the U.S. company's electronic control Carterpillar pump nozzle, the United Kingdom L ucas CAV EUI-based company's electronic control, such as pump nozzle. The injection pressure of existing products as much as 1 50 MPa, scientific research on the use of diesel has been as high as 2 0 0 MPa, or even higher injection pressure of the pump nozzle systems. Machine-driven electronic pump nozzle systems in foreign countries have Access to the full development, from less than 1 L single-cylinder displacement of small single-cylinder diesel engine emissions to the L to a few of the heavy-duty diesel engines have been used satisfactory results.

6, electronically controlled with pressure-pump nozzle systems

In recent years, electronic control with pressure-pump nozzle of active research. Because it does not need to drive machinery and mechanical conditioning, it can not re-design of the diesel engine under the pump nozzle to play the advantages of companies such as the United States Caterpillar The electronic control with pressure-pump nozzle systems HEUI, the system's main features are: will be electronically controlled hydraulic and technology, according to the time control process and the jet spray pressure of the system's work has nothing to do with the engine speed, in a broad Conditions within the framework of maintaining high pressure fuel injection, the maximum injection pressure to reach 1 50 MPa; has injection rate controls, the initial supply period, the ignition delay period and the main jet fuel supply during the optimization of control ; Application of the diesel engine fuel injection system of the smoke particles and NOX emissions and responsiveness have been improved.

BKM companies from the United States in 1975 started to develop electronic control with pressure-pump nozzle, in 1983 a formal mass production. This servo fuel injection system to meet the 17 ~ 2 91 0 k W Diesel needs of the match, the maximum injection pressure up 160 MPa.

Japan's Komatsu other products is also available in electronic hydraulic pump nozzle KOMPICS company, Denso's common rail system ECD-U2, and Germany's Bosch common-rail diesel engine with electronically controlled pressure-spray systems.