Question about 1990 Isuzu Pickup
A pulse fuel pump has four tubes connected to it. One tube connects the fuel tank. Two tubes connect each carburetor and one tube connects the crankcase of the engine. When the engine revolves, the tube connecting the engine delivers fuel with a pulse of pressure at each revolution. The diaphragm pulsates with the pressure. At the top of the pump are two chambers. They are separated by a pair of one way valves. These valves ensure that the fuel that passes through does not come back. Fuel flows from one chamber to the other at one pulse and at the next pulse, fuel moves to the engine.
The bottom end of the engine crankcase is continuously subjected to a high or low pressure with every pulse. This pulse is transferred to the fuel pump by a pulse tube. The pulse line connects the pulse chamber. The pressure of the crankcase is pushed by the pulse through a pair on one way valves and fuel passes continuously, and in a correct measure, to power the engine.
Posted on Nov 09, 2010
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Posted on Jan 02, 2017
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