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Fuel feed pump diesel engine : construction and working

Fuel feed pump diesel engine : construction and working

Fuel feed pump diesel engine is a mechanical device which works for supply the fuel. The fuel feed pump diesel engine is brings fuel from fuel tank and sends to the filters, FIP and injectors. Fuel feed pump has driven by engine cam shaft. Now we are going to learn about fuel feed pump diesel engine


fuel-feed-pump-diesel-engine


Construction of fuel feed pump diesel engine:-

The fuel feed pump diesel engine have a fuel inlet which is connected with fuel tank by the fuel feed pipe line. It also have a fuel outlet which is connected with filter and FIP by the low pressure pipe line.

The fuel feed pump diesel engine have two check valve namely inlet check valve and outlet check valve, both are fitted inside the pump body at inlet and outlet of the fuel.

For airlock removing operation the fuel feed pump diesel engine have a manual operating lever. For normal cleaning of the fuel it have a gauge filter inside the body.

There is a plunger fitted inside the fuel feed pump diesel engine body and to keeps in initial position of this plunger there is a returning spring is also provided.

There  is a continuity channel is casted inside the body which make continuity of fuel supply for the system.

Working of fuel feed pump diesel engine:-

There is two different working of the fuel feed pump diesel engine one is manual operation while removing airlock and one is fuel supply operation while engine start. 

1. Manual operation while removing airlock:-

When vehicle getting off because of the airlock in the fuel supply system. Then the user have to bleed the air from the system.

Now the user have to open the manual priming lever and start priming by pulling and pushing this manual priming lever. 

Continues priming of the lever there is a suction is being creating and takes fuel from fuel tank and supply to the system.


fuel-feed-pump-diesel-engine


2. Fuel supply while engine start :-

During engine starting the cam shaft of the engine is gives drive to the fuel feed pump diesel engine. The plunger is start moving front and rear. While the plunger is comes back then a suction take place inside the body. Because of this suction fuel flow from fuel tank and filled into the pump body by opening the inlet check valve.

While the plunger is goes front then it make pressure on the fuel and fuel flow to the system by opening the outlet check valve. During fule outlet some fuel goes behind the plunger through the continuity channel. While plunger goes back again then fuel come see from fuel tank into the pump body but the fuel which is at the behind of the plunger is flow to the system and make a continuity of fuel supply. 


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