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Diaphragm gas pump
Feb 02, 2018

Diaphragm gas pump

Diaphragm gas pump is a representative of mechanical gasoline pump, used in carburetor engine, usually driven by camshaft eccentric, its working condition is:

① oil camshaft rotation, when the eccentric rocker top arm, pull down the pump membrane rod, the pump film down to produce suction, gasoline sucked out from the tank and through the tubing, gasoline filters, into the gasoline pump oil room.

② pump oil When the eccentric wheel rotation angle is no longer the top arm, the pump membrane spring stretch, the top of the pump film rose, the pressure from the delivery valve to the carburetor float chamber.

Diaphragm gas pumps are characterized by their simple construction, but due to the thermal effects of the engine, special attention must be paid to ensuring the performance of the pump oil at high temperatures and the durability of the rubber diaphragm to heat and oil.

General gasoline pump maximum fuel consumption than gasoline maximum fuel consumption of 2.5 to 3.5 times. When the pump oil volume is greater than the fuel consumption and the carburetor float needle valve is closed, the pump oil pressure in the pipeline increased response to the pump, the diaphragm stroke shorten or stop working.


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