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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.
Maschinenfabrik Fahr (Fahr Machine Factory) was established by Johann Georg Fahr in Gottmadingen in 1870. One of its most important products was the self-binder, manufactured in 1911, while the first tractor, the Fahr F22, was built in 1938 from an idea of Wilfred Fahr and Bernhard Flerlage, and had a 22 hp (16 kW) Deutz F2M414 twin-cylinder diesel engine.
The injector is located in the combustion chamber, inlet manifold or – less commonly – the throttle body. Fuel injectors which also control the metering are called injection valves , while injectors that perform all three functions are called unit injectors .
Injection pump for a 12-cylinder diesel engine. An injection pump is the device that pumps fuel into the cylinders of a diesel engine.Traditionally, the injection pump was driven indirectly from the crankshaft by gears, chains or a toothed belt (often the timing belt) that also drives the camshaft.
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 .
Deutz-Allis was a company formed when Deutz-Fahr of Germany, part of KHD, purchased the agricultural assets of the Allis-Chalmers corporation in 1985. [ 1 ] Deutz-Allis was eventually sold to the Allis-Gleaner Corporation, or AGCO ), in 1990. [ 2 ]
Deutz also sells a line of economic liquid-cooled engines. In 2007, the "Deutz Power Systems" division was sold to 3i, and Deutz AG now concentrates on producing and selling compact engines under the Deutz brand only. They focus on manufacturing engines only for the customer, without competing for the entire piece of finished machinery.
Common rail fuel system on a Volvo truck engine. In 1916 Vickers pioneered the use of mechanical common rail systems in G-class submarine engines. For every 90° of rotation, four plunger pumps allowed a constant injection pressure of 3,000 pounds per square inch (210 bar; 21 MPa), with fuel delivery to individual cylinders being shut off by valves in the injector lines. [1]