Buick Regal Mechanical Fuel Pump
About Mechanical Fuel Pump
Mechanical fuel pumps are typically used on older carburetor-equipped engines (though a few of them have a low-pressure electric fuel pump mounted in or near the gas tank). The pump performs the task of syphoning fuel from the gas tank and moving it further into the carburetor while the engine is working or cranking. The hydraulic fuel pumps also use levers that sit on the camshaft to pump a rubber diaphragm inside the pump up and down. Consequently, suction is generated which pulls the inot fuel pump and then pushed along. A pair of (one way) valves inside the pump allow the gas to travel in one direction. The performance level of a mechanical fuel pump can be found to be relatively small (only 4 to 10 psi).
What is the purpose of Mechanical Fuel Pump?
Mechanical fuel pumps exercise the function of syphoning the gas tank fuel. Then it moves it to the carburetor while the engine runs or cranks. All the pumps are used on six cylinder inline, and usually diaphragm type V8 engines. The pump operates via an eccentric lobe found on the camshaft or camshaft gear. The eccentric sits directly on the fuel pump arm on the six cylinder engines, while on the V8 engines, the fuel pump arm is powered by a push rod between the eccentric camshaft and the fuel pump.
How Mechanical Fuel Pump Works?
There is a flexible diaphragm in the mechanical fuel pumps, and the volume of the pump chamber is reduced or increased by flexing the diaphragm. The pump has a lever which works using the camshaft which pulls down the diaphragm and allows the fuel to be drawn into the pump. The diaphragm is pulled up by the diaphragm spring using force which further allows release of fuel from the pump.
Where is Mechanical Fuel Pump Located?
The mechanical fuel pump is found on the engine block near the engine front. There are two types of mechanical fuel pumps on the market which include: diaphragm pump and fuel pump type plunger.