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| VE Pump in structure and working principle |
VE Pump in structure from left to right drive shaft, oil pump, transmission gear, roller seat and wheel, face cam, piston, control units, sub-facilities, pump head and the solenoid valve stops oil installations. Pump on the part of the governor, the lower part of the advancer. Works are: distribution of pump shaft rotates, driven fuel pump to suck out the fuel from the tank through the fuel filter filter, removing impurities in the fuel into the oil-water separator, separating out the oil in the water, then inhalation of fuel pump, fuel pump output pressure and fuel pump speed is proportional to VE and can regulate the fuel pressure by regulators to limit the provision of fuel under pressure. After a certain fuel pressure control solenoid valve from the inlet into the plunger cavity, and part of the fuel into the device ahead of time ahead of institutions in controlling the displacement of the piston, the excess oil through the oil return screw (oil return solenoid valve) back into the orifice oily road and fuel tank. Rotating shaft driven cross block, cross block has driven face cam rotation, through the end of cam driven distribution pin plunger rotation. Plunger spring and plunger pressure spring Xiazuo will be distributed on the face cam. When the shaft rotates, the cam face to make an effect in the cross-block rotation, while reciprocating movement under wheel. Distribution from the distribution of the plunger of the rotation effect, reciprocating pump oil from the role. The fuel into the plunger cavity in the distribution generated under high pressure reciprocating plunger, and then sub-package, delivery valve, injector spray into the cylinder. Rotating shaft vibration block driven by another gear, fly and fly, Block block block rotation, the centrifugal fly block and the governor to promote the governor sleeve stent components, when the speed changes through the support of the motion to change the speed control set of relative excess orifice position to change the oil stroke, adjust fuel supply to meet the different conditions when the engine needs. Termination of oil is set by the control and distribution of the overflow hole on the plunger position to decide, when the overflow hole of the face exposed control units, the fuel leak from the overflow hole, oil end. |
