Expert Yogi
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Diaphragm gasoline pump diaphragm gasoline pump is the representative of mechanical gasoline pump. It is used in carburetor engine. Generally, it is driven by eccentric wheel on camshaft. Its working conditions are as follows: (1) When the eccentric camshaft rotates, when the rocker arm of the eccentric wheel is shaken and the pulling rod of the pump membrane is pulled down, the pump membrane drops down, suction is generated, and the gasoline is sucked out of the tank, and through the oil pipe, the gasoline filter and the inlet. The oil chamber of the human gasoline pump. (2) When the eccentric wheel rotates at a certain angle and no rocker arm is jacked, the pump membrane spring extends and the jacking pump membrane rises, which presses the gasoline from the oil outlet valve to the float chamber of the carburetor. Diaphragm gasoline pump is characterized by simple structure, but due to the thermal impact of the engine, special attention should be paid to ensure the performance of the pump oil at high temperature, and the durability of rubber diaphragm for heat and oil. The maximum fuel supply of gasoline pump is 2.5-3.5 times larger than that of gasoline engine. When the fuel consumption of the pump is greater than that of the fuel consumption and the needle valve of the carburetor float chamber is closed, the pressure in the oil pump outlet pipeline increases, which reacts to the oil pump, thus shortening or stopping the diaphragm stroke.
Gasoline pump Electric gasoline pump Electric gasoline pump, not driven by camshaft, but relying on electromagnetic force repeatedly suction pump membrane. This kind of electric pump can freely choose the installation position and prevent the air resistance phenomenon. The main installation types of electric gasoline pumps for gasoline injection engines are in the fuel supply pipeline or in the gasoline tank. The former has a large layout range, does not need to specially design the gasoline tank, and is easy to install and disassemble. But the oil pump suction section is long, easy to produce air resistance, work noise is also large, in addition to the requirement that the oil pump absolutely must not leak, the current new type of vehicle has been less used. The latter has simple fuel pipeline, low noise and low requirement of multi-fuel leakage, which is the main trend at present. In operation, the flow rate of gasoline pump should not only provide the consumption of engine operation, but also ensure sufficient return flow to ensure the pressure stability and sufficient cooling of the fuel system.
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