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| Fuel pump, regulator, oil return solenoid valve |
Oil Pump Distribution using the sliding vane pump oil pump, the eccentric ring, sliding vane and rotor and oil pump cover composition shown in Figure 5, mounted on the inner side surface of the pump chamber. When the shaft rotates, through the fuel pump key Driven rotor rotation, the rotor drive 4 vane rotation, while in the cross vane slot for reciprocating, sliding vane eccentric end of the first ring is always close to the wall, scraping along the surface into the oil action to Area and volume change in oil pressure, into the oil volume from small to big, fuel is drawn into the oil, pressing oil volume from big to small, has a certain pressure fuel oil is pressed out of pressure to complete Pumping process, the pressure increased with the increase of speed, which on the one hand ensure the pump cavity was filled with fuel, while making parts are lubrication, cooling, on the other hand the output of the fuel pressure control System with advancer action. Regulators Control the pump pressure pump chamber. Pressure regulating valve by the pressure regulator body, pressure regulator piston, pressure regulator spring, ring and plug up the composition. By the pump piston within the fuel pressure regulator pressure and pressure regulator bomb The joint action of spring force. Distribution of the pump speed is different from the fuel oil pump output volume is not the same pressure fuel pump chamber shown in Figure 7 also change, as the fuel for the regulator piston Pressure regulator spring force than when the regulator spring is compressed, pressure regulator piston to move, when the pressure reaches a certain value, the regulator piston up to the hole to open the bypass pressure regulating valve, part of the Fuel flows through the bypass hole oil pump inlet, thus by changing the pressure regulator spring preload to adjust the pump chamber pressure regulator spring force determines the size of the size of the pump chamber pressure. Back to the oil solenoid valve Oil return solenoid valve is a solenoid valve with a screw back to the oil, which consists of coil, valve, solenoid valve spring and the composition of the oil return solenoid valve, valve hole on the back two rows, the row of four The lower hole is a hole through the engine cooling water temperature sensors, automatically closing and opening the overflow valve oil return hole, cold start, the oil return solenoid valve coil is connected, pump pump chamber Pressure increase, so that fuel supply advance angle, starting after the oil return solenoid valve circuit is disconnected, spool back position, return the oil from the second row of five holes in the upper and lower back into the oil tank or on the road back to big oil quantity The pump chamber pressure drop, point back to earlier in situ. |
