Unit injector - Wikipedia
A unit injector (UI) is a high-pressure integrated direct fuel injection system for diesel engines, combining the injector nozzle and the injection pump in a single component. The plunger pump used is usually driven by a shared camshaft. In a unit injector, the device is typically lubricated and cooled by the fuel itself.
Unit injector for large engines - Bosch Mobility
The electronically controlled unit injector is a single-cylinder injection pump with integrated injection nozzle and solenoid valve that is installed directly in the cylinder head of the diesel engine. A separate injector is assigned to each engine cylinder.
How HEUI Injectors Work
How HEUI Injectors Work. A hydraulic electric unit injector applies the relationship between force, pressure, and area in order to create relatively high fuel injection pressures from pressurized engine oil.
Understanding the Unit Injector System Diagram: A …
A unit injector system, also known as a unit pump or unit injection pump, is a type of fuel injection system commonly used in diesel engines. It combines the functions of a fuel pump and an injector into a single unit, delivering fuel directly into the combustion chamber at high pressures.
Unit Injector and Unit Pump Systems - DieselNet
In unit injector (UI) and unit pump (UP) systems, each engine cylinder is served by a separate injection pumping element or injection pump in close proximity to the cylinder. Unit pump (UP) systems enable short high pressure fuel lines by locating the pump close to the injector.
The electronic unit injector injects fuel directly into the combustion chamber. The injector performs these three functions: 1. Creates the high fuel pressure required for efficient injection. 2. Meters and injects the exact amount of fuel required to handle the power requirement. 3. Atomizes the fuel for mixing with the air in the combustion ...
Electronically controlled unit injector - Wikipedia
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 Difference Between Common Rail and Unit Injectors
2023年9月15日 · Common rail injectors utilize a high-pressure fuel rail that provides fuel to the individual injectors. Unlike with unit injectors, the rail maintains the fuel at a constant, high pressure that is necessary for injection.
The robust unit injector has an integrated high-pressure pump and injects the right amount of fuel required for eficient combustion into the cylinder. The advantage of the unit injector system is that there is no high-pressure line between the high-pressure pump and injection nozzle.
Each cylinder has its own unit injector (UI), which is installed directly in the cylinder head (Fig. 1). For passenger cars, there are two types of unit injector (UI-1, UI-2), which – while having an identical function – differ in size. In a 2-valve engine, the UI-1 is secured.
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