The electric fuel pump is used in modern internal combustion engines to provide fuel in the gas tank to the injectors. The pump must deliver fuel under high pressure so that the nozzle can spray it in the engine.
For the correct engine performance, fuel pressure should be within allowed specifications for any given engine. Too low-pressure can lead to “fuel starvation” engine misfire, excessive vibration or stop the engine under load. Too much pressure causes irregular engine running too rich mix and excessive contamination.
Electric fuel pumps are often installed in the fuel tank (ingestion), even though some can be set up outside. Some cars may be equipped with two pumps (one pump in the tank and the main pump on the outside). Check out http://www.huahin-property-agency.com/ for searching automotive relay.
The positioning of the pump in the gas tank helps mute the buzzing sound of pump’s electric engine. Submersion into the gas helps lubricate and cool the pump’s engine. Driving with the fuel tank full of less than 1/4 of its quantity can shorten the lifespan of the pump and trigger rapid overheating. Additionally, it increases the risk of pump left with no gasoline during rapid acceleration or deceleration.
The pump is usually a part of a module which also contains a float which carries electrical signals to the level indicator, located on the dashboard. If the fuel pump needs replacing, it may be replaced individually or the entire module assembly (it’s expensive but much simpler).
Different electrical fuel pumps have various designs. Some older designs used to use forced displacement of the flow pump chamber. This kind of pump can create very substantial pressure and continuous flow. But in the outlet of the gas pump has been strong pressure changes, so frequently in the gas line after the pump has been installed the damper to decrease the amplitude of pulsation of gas pressure.