3126 Used Fuel Injector For Excavator E325C 171 - 9704 / 198 - 6605
/ 128 - 6601
Specification
| Part Name: Fuel Injector Assy | Part Number: 198 - 6605 / 128 - 6601 |
| Category: Spare parts | Cylinders Number: 6 |
| Condition: Original Used | Test staus: Normal |
| Type: Electric Injection | Injector Code: 66041010801 |
Description
Getting Fuel to Your Engine
In general, pure fuel combusts poorly --- for peak performance, the
engine must mix the fuel with a precisely metered quantity of air.
Early engines used a mechanical device known as a venturi. Air
flowing over the venturi draws fuel into the airstream, delivering
a fuel-air mixture to the cylinders. These devices, known as
carburetors, suffer from inherent inefficiencies, leading to
uncombusted fuel and high emissions. As a result, fuel injectors
emerged --- small devices that inject a predetermined amount of
fuel, rather than relying on air pressure to do the job.
Compare with Single and Multi-point
Some fuel injectors, like carburetors, mix in fuel at a single
point in the throttle body. This makes it easier to upgrade engine
designs for use with injection rather than carburetion, but there
is a lack of improved fuel efficiency. Multi-point injection (MPI)
systems inject fuel at each cylinder, allowing much greater control
over how much fuel the engine burns. In MPI systems, the injection
generally takes place directly inside the cylinder's intake valve.
Types of MPI Systems
Depending on how the injection is handled, MPI systems fall into
several types. Simultaneous MPI engines inject fuel into all the
cylinders at the exact same time; this is similar to single-point
injection system, in that the fuel delivered to any given cylinder
at any given time is the same in both cases. Batch MPI systems
inject fuel into groups of cylinders. In a piston engine, cylinders
are at different points of their combustion cycle at different
times, so a batch system can be used to inject fuel to cylinders in
a similar part of the cycle. Sequential MPI systems are more
complicated, and time the injection of fuel so that it enters each
cylinder exactly when it's needed.
