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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.
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 .
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]
The 1994.5 to 1996/97 DI Power Stroke has "single shot" HEUI (hydraulically actuated electronic unit injection) fuel injectors which were AA code injectors unless from California where as they received AB code injectors. It ran a high pressure oil pump (HPOP) to create the necessary oil pressure to fire the fuel injectors.
In a manifold injection system, air and fuel are mixed outside the combustion chamber so that a mixture of air and fuel is sucked into the engine. The main types of manifold injections systems are multi-point injection and single-point injection. These systems use either a continuous injection or an intermittent injection design. [13]
The Navistar DT (Diesel Turbocharged or Diesel Turbo) engine family is a line of mid-range inline-6 diesel engines.With horsepower ratings ranging from 170 hp (130 kW) to 350 hp (260 kW), the Navistar DT engines are used primarily in medium-duty truck and bus applications such as school buses, although some versions have been developed for heavy-duty regional-haul and severe-service applications.
The 4JJ3-TCX is a newest Engine 3.0L common rail direct injection engine with VGS-turbo and intercooler, which replaced the 4JJ1-TCX in the Isuzu D-Max It uses unit injectors With the introduction of Isuzu's "BluePower" system and 4 valves per cylinder. Power 190 PS (140 kW) and 450 N⋅m (330 lb⋅ft) of Torque in 2019, the compression ratio ...
Bosch 2,000 bar (29,010 psi) common rail (CR) (one rail per cylinder bank) direct injection: with two chain-driven high-pressure fuel pumps, fuel cooler for return line, twelve combustion chamber-sited eight-hole (0.12 mm (0.0047 in)) piezo injectors with multi-pulse injection (up to five injection operations per piston cycle, including pre ...