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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]
Denso HP3-based common rail with system injection pressure increased to 2,000 bar (29,000 psi) common rail injectors that have 10 spray small 0.119 mm (0.0047 in) holes (instead of the 6 used on the MZR-CD 2.0) and higher response solenoids; low compression ratio of 16.3:1, made possible with highly atomizing injectors
A Digifant II DF-1 Engine Control Unit used in '91 Volkswagen Golf Cabriolet with 2E engine. Digifant is an Engine Management System operated by an Engine Control Unit that actuates outputs, such as fuel injection and ignition systems, using information derived from sensor inputs, such as engine speed, exhaust oxygen and intake air flow. [1]
A fuel control unit attempts to solve those problems by acting as an intermediary between the operator's controls and the fuel valve. The operator has a power lever which only controls the engine's potential, not the actual fuel flow. The fuel control unit acts as a computer to determine the amount of fuel needed to deliver the power requested ...
The fuel is sprayed with the help of a nozzle that is opened and closed with a solenoid-operated needle valve. [5] Third-generation common-rail diesels use piezoelectric injectors for increased precision, with fuel pressures up to 300 MPa or 44,000 psi. [6] The types of common-rail systems include air-guided injection [7] and spray-guided ...
common rail (CR) direct diesel injection: electric low-pressure fuel lift pump, one timing belt-driven 1,600 bar (23,210 psi) injection pump, two common rail fuel rails (one per cylinder bank), piezo-electric operated fuel injectors with eight-hole nozzles for homogenous fuel delivery, single and double pilot injection, up to four main ...
It ran a high pressure oil pump (HPOP) to create the necessary oil pressure to fire the fuel injectors. This generation of Power Stroke utilizes an HPOP with a 15° swash plate angle. The 1995-1997 trucks use a two-stage cam-driven fuel pump, whereas the 1999-2003 trucks use a frame rail mounted electric fuel pump.
The functional objective for the crankshaft position sensor is to determine the position and/or rotational speed of the crank. Engine Control Units use the information transmitted by the sensor to control parameters such as ignition timing and fuel injection timing. In a diesel, the sensor will control the fuel injection.