Diesel Components logo-header

How a diesel fuel injection system works?

How a diesel fuel injection system works depends a lot on the type of diesel fuel injection system. The most popular fuel injection systems are of four types.

Diesel Fuel InjectionSingle-Point or Throttle-Body Injection

The most basic kind of fuel injection, single-point just replaces the carburetor with a couple of fuel injectors in the throttle body, which is the throat of the motor’s air intake system. For certain automakers, the single-point injection has led the way to the more sophisticated multipoint system. Despite the fact that they are not as complex as the systems that have followed, throttle body injection meters fuel with more control over a carburetor and is more affordable to maintain.


Port or Multipoint Fuel Injection

Multipoint fuel injection dedicates a different injector to every chamber, directly outside its intake port, which is the reason the system is also called port injection. Shooting the fuel fume so near to the intake port nearly guarantees that it will be drawn totally into the chamber. The benefit of this is that MPFI meters fuel more accurately than TBI structures, better accomplishing the ideal air-fuel proportion. Likewise, for all intents and purposes, it wipes out the likelihood that fuel will gather or gather in the intake manifold. With TBI and carburetors, the intake manifold should be such that it can conduct heat to disintegrate fuel.

This is not needed on engines furnished with MPFI, so the intake manifold can be framed from lighter-weight material, even plastic.


Sequential Fuel Injection

Sequential fuel injection, additionally called sequential port fuel injection (SPFI) or coordinated injection, is a sort of multiport injection. Despite the fact that MPFI utilizes various injectors, they all splash their fuel simultaneously. Accordingly, the fuel may “stick around” a port for up to 150 milliseconds when the motor is idling. This may not appear a lot, yet it’s an inadequacy enough that mechanics tended to it: Sequential fuel injection triggers every injector at different times. Coordinated like sparkle plugs, they shower the fuel as soon as the intake valve opens. It appears to be a small advancement, yet hugely impact the effectiveness.


Direct Injection

Direct injection takes the fuel injection idea about to the extent it can go, infusing fuel into the ignition chambers, past the valves. Once more, fuel metering is considerably more exact than in the other injection systems, and the immediate injection gives engineers one more factor to impact how burning happens in the chambers. The study of engines investigates how the air-fuel blend whirls around in the chambers and how the explosion moves from the start point.


Fuel injection systems are many and they work in their own individual way. It may seem on the surface that on is better than the other however a lot depends on the type of diesel car they are being used for. To best assess the ideal fuel injection system for your vehicle, get an opinion from the experts at the Diesel Components Inc