Doosan fuel pumps
In direct injection engines as well as diesel engines, the Doosan electric fuel pump is used in the low pressure circuit for pre-supplying fuel to the high-pressure pump - Doosan injection pump. The electric Doosan fuel pump creates a fuel pressure in the limit of 0.3-0.4 MPa (in engines with direct injection - up to 0.7 MPa). The use of mechanical pumps in Doosan fuel injection systems is not possible due to low fuel delivery pressure.
By design, the following types of electric fuel pumps are distinguished: roller, gear and centrifugal.
In the Doosan roller pump, the fuel is sucked and injected by rotating the rotor and moving the rollers therein. As the space between the roller and the rotor increases, a vacuum is created, and the fuel fills this space. When the space is full, the fuel supply is cut off. As the rotor rotates, space decreases, the discharge port opens and the fuel leaves the pump under pressure.
Similarly, the Doosan gear pump works where the fuel is sucked and injected by the movement of the inner gear (rotor) relative to the eccentrically located outer gear (stator). The lateral sides of the rotor tooth, during rotation, form in their gaps the changing chambers, with which the fuel is sucked in and injected.
Due to the design features, the Doosan roller and gear pumps are installed in the fuel line. In modern injection systems, preference is given to centrifugal or vane Doosan pumps, which provide a uniform (without pulsations) fuel supply and produce little noise. At the same time, Doosan centrifugal pumps have limitations on the created pressure and productivity.
Centrifugal Doosan fuel pump. The impeller rotates inside the chamber, in which there are two channels of a certain shape - suction and discharge. Fluctuations in the fuel resulting from the action of the blades on it provide an increase in pressure.
PUMP ASSY,FUEL - 129953-51090, 2.241-00095
PUMP ASSY,FUEL - 241-00011A
PUMP ASSY,FUEL - 401-00366
PUMP ASSY,FUEL - 401-00371
PUMP ASSY,FUEL - 65.12101-7012S, 65.12101-7012D
PUMP ASSY,FUEL - 68371-51210
PUMP ASSY,FUEL - A218403
PUMP ASSY,FUEL - A381316
PUMP ASSY,FUEL - A402117
PUMP ASSY,FUEL - A409560
PUMP ASSY,FUEL - D460517
PUMP ASSY,FUEL - D491407
PUMP ASSY,FUEL - K7C8081
PUMP ASSY,FUEL - K9006871
PUMP ASSY,FUEL,ELECTRIC - 2.241-00018
PUMP ASSY,FUEL,GAS - A331390
PUMP ASSY,FUEL,OLD - 7C8081, K7C808