Technologies In Action: Vehicle Injectors Ultrasound Cleaning

The injectors are activated with electric shock and nozzles used in engines with distributed fuel injection may have the lower, upper side or supply of fuel. At the lower traverse a constant flow of gasoline through the nozzle is performed, which ensures it is cooled and prevents the formation of vapor bubbles. With a high pressure injection this problem can be solved without the flow of fuel through the nozzle.

Electromagnetic nozzles are manufactured with a tolerance of 1 micron and are able to work up to a billion cycles. The main reason for the violation of their operation is pollution in the operation, although the way of mechanical particles are fuel filters that discard the particles larger than 10-20 microns. They are installed in the fuel line and the injector itself.

The latter are relatively small and are designed to ensure the purity of the fuel supplied to the nozzle, cutting a particularly small inclusions, penetrated through the filter of thin clearing of fuel. The absorption capacity is low, and clogged, they leave the nozzle on a starvation diet. To avoid this, you need to monitor the condition of the filter of thin clearing of fuel. The main reason for pollution of atomizers is lower-quality fuel and the presence in its composition of heavy fractions.

Clean injectors with ultrasound

Not always the use of chemical cleaning methods nozzles brings results. And this is where more effective technologies come to the rescue – ultrasonic cleaning is one of them.

Nozzles are removed and placed in a special bath. In simple technological processes these baths are the only devices that make the magic happen. Thus, e.g. a range of basic ultrasonic cleaner devices by Hilsonic, a prominent UK manufacturer, demand just plugging in AC/DC adapter. Under the influence of ultrasonic vibrations liquid particles per second reciprocating motion with a frequency generator. Because of the inertia of the movement not only micro-volumes of liquid with sharp changes in acceleration happens, but also an abrupt change in the pressure in them is monitored. The working fluid bombards the surface of the cleaned items and rips off its dirt particles. Such intense comminution enhances fluid movement dirt particles in the working fluid.

Most notably, the complete removal of contaminants by means of ultrasound is achieved even in the narrow recesses and holes cleaned product. The nozzles are immersed in a bath of the dosing part, establishing a special holder. It is important that they are in limbo, constantly washing the cleaning liquid when exposed to ultrasonic vibrations. If the nozzle will touch the bottom of the bath, it can lead to premature failure of the ultrasonic generator.

After cleaning an ultrasonic bath a so-called backwash is initiated. To complete this process filters are removed and by means of special adapter placed in the bath. Remnants of dirt are washed with fluid in the reverse direction.

Any of the above methods of cleaning should end with quality control. Sometimes, in order to achieve an acceptable quality of the cleaning process the procedure has to be repeated several times.

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