4TNV94 4TNV98 Used Fuel Injection Pump 729929 - 51330 DX55 - 9
Excavator
Specification
| Car name: Fuel Injection Pump | Model Number: 4TNV98 |
| Quality: High quality | Engine type: Diesel |
| Application: Excavator | Part code: 72992951330 |
| Cooling: Water cooling | Injection: Direct |
Description
What is a Fuel Pump Relay?
The fuel pump relay sends a current to the electric fuel pump.
A fuel pump relay is an electrical device much like an automotive
fuse. It directs current to the electric fuel pump and ensures that
the part receives enough power to operate properly, but not too
much as to damage it. Fuel pumps require a lot of power to operate
and this could cause overheating of the wiring system and the pump
if were not for the relay.
In most automobiles, the fuel pump relay is underneath the
vehicle's hood and attached to the firewall. It is a small black
plastic box with a wiring harness plugged into the bottom of it.
The relay operates as a monitor for the power going to the fuel
pump, activates it when the ignition is turned on, and turns the
pump off when the vehicle is turned off. The fuel pump can be heard
humming when the ignition switch is first turned to the on
position. This provides fuel for the vehicle to start up, and once
the vehicle is running, the vehicle's computer sends a signal, and
the fuel pump relay turns off. The vehicle's fuel pump will now be
powered through another source, typically in the oil pressure
sending unit.
Injection Process
Smaller engines, such as those in cars and light trucks, use a
distributor pump to control the fuel injection process. The
injector pumps gas or diesel into fuel lines, which is how the
volume of fuel is controlled. The timing of the injection process
is controlled by the crankshaft. Essentially, the faster a vehicle
moves, the more fuel is injected into the internal combustion
engine. This can be accented with the addition of a turbocharger or
supercharger, which gives the engine more power.
