Spray nozzles are mechanicaldevices designed to spray fuel in the injector and diesel systems. The supply of gasoline or diesel fuel is carried out under high pressure. What is noteworthy, on gasoline engines, spraying produces at a pressure of 3-5 atmospheres, while diesel injection is carried out at 1000-1200 atm.
This part performs several functions at once.fuel delivery system. First, it doses the right amount of injected gasoline. Secondly, the nozzle atomizer (KAMAZ-5460 including) perform the function of controlling and preparing the jet of fuel. And thirdly, this device separates the injection system from the combustion chamber of the engine itself.
Often modern sprayers of dieselThe nozzles consist of one or two channels (nozzles) through which fuel is supplied to the outlet and then sprayed into the combustion chamber. The quality part should provide an even cone-shaped spraying of the liquid.
At the moment there are only two types of mechanisms:
In the first case, the injector nozzlesThey are used in the mechanisms of vortex and pre-chamber diesel engines. Multi-jet devices are most often equipped with cars that have direct fuel injection, including on cars with Common Rail systems. Both mechanisms have their own design features, however their operating principle and the main function does not change from this.
When the injectors are in the openposition, the liquid is injected into the combustion chamber. From its quantity and quality of delivery depends a lot of factors, starting from engine power and ending with fuel consumption. If the spraying is wrong, the car starts to smoke, lose dynamics and at the same time consume more fuel. There is a constant zakoskovka jets, which can lead to a complete failure of it. The tightness of the device, which is in the closed state, ensures a tight fit of the tip of the needle into the seat of the nozzle body. When the nozzle atomizers are in the closed position, this needle is held by a special spring that acts from the locking cone of the device side. It is also worth noting that in the Common Common systems, the pressure of the most combustible liquid is used instead of a spring.
Before the fuel enters the combustion chamber, itinjected into the nozzle, and then passes through special channels inside the nebulizer (we talked about them at the beginning of the article). Gradually, the fuel is injected into this device, as a result of which pressure builds up in the system. As soon as its value reaches the required value, the needle spring of the sprayer opens and the process of fuel injection into the cylinder begins. In this case, the rod of the opened device goes inside the guide channel in the nozzle body.