Because of the tight regulations for exhaust pollution in developed countries as well as the demands of effective and economical use of fuel in the world industry caused significant changes in the type of fuel used on search engines Caterpillar.
Actually, there are four kinds of methods on Caterpillar fuel system are:
- Pump & Line
- Mechanical Unit injector (MUI)
- Mechanical actuated Electronic controlled Unit Injector (EUI)
- Controlled hydraulically actuated Electronic Unit Injector (Heui)
But will explain the basic system alone.
PUMP & LINE
Component Pump & Line Fuel System includes:
- Fuel Tank
- Fuel Filter
- Fuel Transfer Pump
- Fuel Injection Pump
- Governor
- Timing Advance
- Fuel Ratio Control
- High Pressure Fuel Line
- Low Pressure Fuel Lines
- Nozzle
- Return Line
Work SystemThe flow of fuel to the fuel pump and line system. Fuel transfer pump sucks the fuel from the tank to the primary fuel filter. Primary fuel filter serves to filter large debris in the fuel, in
addition to the often encountered engine arrangement that uses a primary
fuel filter water separator types as large dirt filter and separate the
water contained in the fuel.
The fuel then flows into the fuel transfer pump and then to hand priming pump and then to the final fuel filter.
Bleed-shaped valve orifice that will drain the fuel into the tank that serves dispose of trapped air and heat in the fuel manifold to the tank. This system also uses a manual bleed valve that can be opened when the fuel priming pump is used to throw the trapped air in the fuel system.
In the final fuel low-pressure fuel fiter screened more thoroughly and then flows into the fuel manifold (gallery) to the fuel injection pump housing. Fuel within the fuel manifold and then into the cavity of the high pressure pump (plunger and barrel). High-pressure pump will regulate the amount of fuel to be pumped to the high pressure fuel line and further towards the injection nozzle at very high pressure.
At the time of the fuel pressure on the high pressure fuel line is higher than the opening pressure nozzle, fuel is injected into the combustion chamber. The combination of very high pressure and hole injection of the fuel in the nozzle causes mengabut perfectly and will result in more complete combustion.
Close the fuel tank normally always have a line that is connected to the outside air, if the channel is clogged can cause a vacuum in the tank and fuel system does not work perfectly.
The fuel then flows into the fuel transfer pump and then to hand priming pump and then to the final fuel filter.
Bleed-shaped valve orifice that will drain the fuel into the tank that serves dispose of trapped air and heat in the fuel manifold to the tank. This system also uses a manual bleed valve that can be opened when the fuel priming pump is used to throw the trapped air in the fuel system.
In the final fuel low-pressure fuel fiter screened more thoroughly and then flows into the fuel manifold (gallery) to the fuel injection pump housing. Fuel within the fuel manifold and then into the cavity of the high pressure pump (plunger and barrel). High-pressure pump will regulate the amount of fuel to be pumped to the high pressure fuel line and further towards the injection nozzle at very high pressure.
At the time of the fuel pressure on the high pressure fuel line is higher than the opening pressure nozzle, fuel is injected into the combustion chamber. The combination of very high pressure and hole injection of the fuel in the nozzle causes mengabut perfectly and will result in more complete combustion.
Close the fuel tank normally always have a line that is connected to the outside air, if the channel is clogged can cause a vacuum in the tank and fuel system does not work perfectly.
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