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Description: This is a description of a gasoline pump in a conventional gasoline engine fuel supply system and is applicable to carburetors.
The current EFI car also has a gasoline pump, but refers to the device is different. For EFI car gasoline pump can see Encyclopedia of "electric gasoline pump."
Gasoline Pump
The role of the petrol pump sucked gasoline from the tank, and pressure pipelines and gas filters sent to the carburetor float chamber.
Thanks to the gasoline pump, the fuel tank can be placed on the rear of the car away from the engine and lower than the engine.
Gasoline pump drive by different methods can be divided into mechanical drive diaphragm and electric drive two. Mechanical diaphragm diaphragm pump is generally driven by camshaft eccentric, its work is:
â‘ 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.
â‘¡ 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.
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.
Another kind of electric gasoline pump, not driven by the camshaft, and by electromagnetic force repeatedly pump membrane. This electric pump, the freedom to choose the installation location, and to prevent air resistance phenomenon.
The electronically controlled petrol pump of a gasoline injection system generally adopts a new type of impeller electric pump and is installed in a gasoline tank, and its pumping pressure is also higher than that of a carburetor fuel supply system.
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