What all you should be knowing about fuel injectors?

Read on the below given article to know about fuel injectors.

The reader is expected to have some familiarity with automotive fuel-injection terminology and a fundamental grasp of what an injector is and how it functions in an engine's injection system.

Fuel injectors for automobiles may seem similar, but they really come in a wide variety of sizes, shapes, and fuel-flow capacities, despite their superficial similarities.

The top-feed injector is by far the most common. O-ring injectors are often installed into a fuel rail made of metal or plastic. There's also the injector made out of a rubber hose.

The injector intake in this design is connected straight to a rubber hose.

SIDE-FEED FUEL INJECTOR

Two main varieties of side-feed injectors exist. The first kind is often seen in Multi-Port Fuel-Injection (MPFI) setups. This fuel injector is designed to be installed in the fuel rail. The second kind is often housed inside an injector pod and is used in TBI (Throttle-Body Injection) systems. ISX Turbo is used widely. Oftentimes, people may mistake TBI systems for electronic carburetors.

To the contrary, this is not the case. Transformational fuel injection (TBI) systems are fully electronic EFI (Electronic Fuel-Injection) setups. Instead of a carburetor's pressure differential, venturi, jets, metering rods, power valves, chokes, floats, etc., they employ injectors.

None of them are used in TBI EFI. The sole shared feature is the fuel's discharge and subsequent passage via the intake manifold.

DIRECT-INJECTION FUEL-INJECTORS

Direct fuel-injection is a kind of fuel-injection technology that improves the efficiency of gasoline engines, leading to greater power, lower emissions, and better gas mileage.

The intake valve receives a spray of fuel from the cylinder head ports in a typical MPFI system. As a consequence, fuel metering is more accurate than it was with the TBI system.

In direct fuel injection, the injector is located inside the combustion chamber itself, much like a spark plug. Pressures of up to 2500 psi are used in a direct fuel-injection system, making the days of using only 43 psi of fuel pressure obsolete. When fuel is metered during the compression stroke, the high fuel pressure is required to overcome the pressure within the cylinder.

This fuel-injection method is 30% more efficient than comparable displacement gasoline engines because it simulates the intake stroke of a Diesel engine.

By injecting some fuel during the compression stroke, as is done in stratified injection, super lean ratios of 69:1 can be achieved, and fuel economy can be improved by as much as 30 percent compared to a conventional sequential-fire fuel-injection setup.

You are now familiar with the most fundamental and widespread variety of fuel injectors used in modern vehicles. Service and maintenance of injectors, from the most fundamental flush to ultrasonic cleaning, will be the subject of upcoming articles.