Electronic unit injector (EUI)

The electronic unit injector (EUI) was developed by Delphi in the 1990s, for use in large diesel engines, to cope with the problem of increasingly stringent restrictions on exhaust gases. The EUI system includes full electronic control with variable injection, used in order to reduce noise. At the same time, sensors around the engine feed a continuous stream of data to the ECU, which calculates the exact amount and timing of fuel injection.