An electronically controlled unit injector ( EUI ) sometimes referred to as a mechanical electronic unit injector ( MEUI ) is a unit injector (UI) with electronic control. It performs the same function as a conventional unit injector in an internal combustion engine , such as in an on-road or off-road vehicle or a diesel-electric locomotive . The pressurized delivery of fuel is camshaft -driven, but the timing of the injector's internal operations are controlled by the engine control unit so as to achieve certain advantages.
6-593: EUI may refer to: Electronically controlled unit injector Energy use intensity European unemployment insurance European University Institute , in Florence, Italy Extended Unique Identifier Europa Universalis , the first instalment within the Europa Universalis video game series Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with
12-436: Is often GPS -assisted, and maintenance personnel can effectively monitor the performance of perhaps thousands of locomotives at all times. EMD has released updated LCU software, and EIUs which complement that software, which allows mixing Tier-1 and Tier-0 injectors within the same engine, and yet meets the applicable emissions tier for that engine. A specific benefit is reduced inventory of injectors. A significant feature of
18-691: The EUI is the built-in plunger pump , which, just as in a UI, allows for low-pressure fuel delivery and return to all injectors, yet provides exceptionally high pressure and concomitant injection and atomization of the fuel to a cylinder during the engine's power cycles. As in a UI, the injector is connected to common banks of fuel supply and fuel return. Fuel is always circulating within the EUI as two of its functions, other than injection for combustion, are injector lubrication and injector cooling. Connections on UIs are by formed steel tubes. Connections on EUIs are by stainless steel-reinforced hoses. The controlled part of
24-635: The cylinder, thereby controlling the volume and timing of fuel delivery. This system is employed primarily on Electro-Motive Diesel (EMD) locomotive, marine and stationary engines, and primarily on the 710 family of diesel engines. When implemented in a locomotive, the ECU may also be incorporated into the Locomotive Control Unit (LCU), which performs a variety of functions, such as wheel-slip control, "phone home" for incident reporting and scheduling of delivery of service parts, etc. EMD's LCU
30-444: The injector is a solenoid-operated spill valve. Normally, it is open, allowing the fuel to return to the supply line when the pump plunger descends. When the solenoid is energized, the spill valve closes, and the fuel is forced through the spray tip into the cylinder. The four phases of EUI operation are: Thus, although the mechanical plunger pump has a fixed stroke, electronic control can select any part of that stroke to deliver to
36-475: The title EUI . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=EUI&oldid=1130179440 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Electronically controlled unit injector Central to
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