NOZZLES/INIETTORI/DUSEN/BEC INJECTEURS

Nozzle is one of the main components of fuel injection systems. It regulates the flow of fuel to the ultimate ignition Compartment.

The main purpose of the Fuel Injection Nozzle is to direct and atomize the metered fuel into the combustion chamber. The combustion chamber design dictates the type of nozzle, the droplet size and the spray required to achieve complete combustion within a given time and space.

The injection nozzle is aimed at the hot exhaust valve, which is cooled by the gasoline. During the compression stroke the piston sweeps past the outlet of the nozzle and thus protects it from the high pressure that develops at the instant of combustion (initiated by spark ignition). A different arrangement in the injection nozzle is located outside the cylinder, protected from high pressure and temperature. It injects the fuel through the inlet port on to the opened inlet valve and thus into the cylinder.

The nozzle is positioned within the nozzle holder assembly; injecting fuel as the pintle is lifted against the force of the pressure spring. The nozzle body and pintle are manufactured as a precisely matched pair to ensure accurate fuel delivery.

NOZZLES HOLDER
The assembly of all parts of the injector other than the nozzle is known as the nozzle holder. The main purpose of the nozzle holder assembly is to position and hold the fuel injection nozzle in the cylinder head. It also has a passage through which the fuel from the high pressure pipes flow to the nozzle. This is also a passage for the flow of excess fuel from the nozzle.

Multi Hole Long Stem Nozzles used on Direct Injections modern Diesel Engines fitted to Commercial Vehicles, Industrial & Agricultural applications.	DLL-S DLLA-S DLLA-P
MultiHole Short Stem Nozzles	DL-S types
Pintle Type	DN-S
Pintaux Type	DNOSDC
Korean Type	DNOPDN

Also see NOZZLE TESTERS