4 electronically controlled diesel injection system classification

There is the first electronically controlled fuel pump technology, and then developed the electronic control pump nozzle injection technology and high-pressure common rail technology, after the two technologies is now the main engine EFI technology. The electronically controlled fuel injection pump nozzle technology pressure is very high, can reach 200 MPa, and pumps and nozzles installed together, so only a very short guide of the high-pressure oil, pump nozzle systems can also achieve a very small amount of pre-jet, The injection of a triangle, and the use of sub-pre-spray, this is very consistent with the requirements of diesel engine (Volkswagen TDI engine is the use of such technology). However, electronically controlled fuel injection pump nozzle technology pressure affected by the diesel engine speed, the use of pressure with the high-pressure common rail system technology can solve this problem. It's lower than the pump nozzle injection pressure systems, can reach 160 MPa. Some companies look to its arbitrary number of engine cylinder fuel injection pressure regulator is very broad characteristics, and gradually expand its scope of use (the first to use the high-pressure common-rail cars is the Alfa Romeo 156 and Mercedes-Benz C-level cars).

The first generation of electronically controlled diesel engine fuel injection system also known as position control system, electronic servo mechanism to replace mechanical governor control oil supply in order to achieve Huatao location of the adjustment. Its characteristics are to retain the traditional fuel pump - high-pressure pipeline - injector systems, Huatao only on the rack or the movement from the original location of the mechanical governor control to computer control. Such technology has been developed to control both the timing and pre-spray the TICS system.