6D125 - 2 Diesel Used Fuel Injector For Excavator PC400 - 6 6152 -
12 - 3100
Specification
| Part Name: Fuel Injector Assy | Size: Standard |
| Category: Spare parts | Cylinders Number: 6 |
| Engine type: Diesel | Test staus: Normal |
| Injection: Direct Injection | Injector Code: 41 - 7040 |
Description
The Fuel Injection System
A modern fuel injection system technically includes some sort of a
sensing mechanism to determine the correct amounts of fuel that
need to be sprayed into the engine’s intake manifold. Another
mechanism is needed to deliver or spray the ‘computed’ amount of
fuel into each cylinder. This is the function of fuel injectors
which we will be discussing in greater detail in the following
section.
There are two types of fuel injection systems that generally
correspond to the two fundamental types of engines we have in the
market today.
Direct
The way in which some engines are designed require the fuel to be
delivered or sprayed directly into the combustion chamber of the
engine. Each cylinder is already filled with compressed air. When
atomized fuel is injected into each cylinder it self-ignites. This
is true for most diesel engines. We said ‘most’ because there are
certain diesel engine designs that move fuel to a pre-combustion
chamber first before reaching the cylinder.
Indirect
Cars that run on petrol have indirect fuel injection systems.
Pressurized fuel is delivered to the engine bay from the car’s fuel
tank. The pressurized fuel is delivered to the intake port or the
intake manifold, depending on the design of the engine. This allows
the fuel to be mixed first with air that passes through the inlet
port or manifold before the mixture is pushed into the combustion
chamber.
The latest cars of today come with multi-point injection. In this
system, each cylinder receives fuel from one specific fuel
injector. So, if you have 6 cylinders you can also expect 6 fuel
injectors. It is this 1:1 configuration that makes this system very
powerful and efficient, albeit complex and expensive to fix. Most
cars, however, have a single-point fuel injection system or even an
injector for every two cylinders.
