Diesel Fuel Injectors at Work!
Jan 2016 11

Diesel is more affordable than gasoline or petrol. It is thus obvious why large scale commercial operations rely on diesel engines. Whether it is the commercial vehicles plying on the streets catering to citywide commutes or long distance trucks catering to moving goods, diesel powered vehicles are on the rise and the growth would continue.

The Diesel fuel injector is an integral part of any diesel engine and it is a tad more complicated than petrol or gasoline powered engines. There are two types of diesel fuel injectors: throttle body injection and individual port type fuel injector. A typical diesel fuel injector has a filter, core spring, guide ring, seat spring, pole piece, seat, solenoid coil and solenoid body, stop, core and a core ring, spray tip housing, spray tip and director. Diesel fuel injectors can come in myriad shapes or forms but they would invariably contain these parts. The fuel flow in a diesel fuel injector is controlled by ECM which functions by raising a ball off the seat. The fuel then flows through the seat and onto the fixed director plate. This plate has several holes through which the fuel flows and gets sprayed at around ten to fifteen degree angles.

Diesel fuel injectors spray fuel directly into the intake manifold of a diesel engine, which is right in front of the intake valve. Every diesel fuel injector has a high micron filter, hypodermic holes and the fuel sprayed through the top inlet and the filter leads to the atomizing of the fuel at the bottom. Other than catering to the primary function, diesel also ensures that the fuel injector remains well lubricated so all its parts can work optimally. The fuel injector valve operates at an rpm of around 1800, thus controlling the fuel intake. An rpm of 1800 typically means that the valve would open and close about 140,000 times in an hour. The diesel fuel injector is crucial to the functioning of the engine. A malfunctioning fuel injector would render the engine un-operational and one would have to replace the injector or have it cleansed and repaired.

A diesel fuel injector works frantically as long as the engine is running. The valve opening and closing to dispense the right amount of fuel happens so fast that it cannot be measured in seconds. Usually, a valve opens and closes and the injector facilitates the fuel dispensing in less than 5 milliseconds.

 

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