What are the types of nozzles for fuel injectors
Orifice fuel injector: The needle valve head has 1-10 precision injection holes (usually 4-8 holes), which spray multiple conical mist
Orifice fuel injector: The needle valve head has 1-10 precision injection holes (usually 4-8 holes), which spray multiple conical mist, suitable for direct injection combustion chambers (especially diesel engines), with uniform atomization, high pressure, and easy carbon deposition.
Needle type fuel injection nozzle: the needle valve has a needle at the lower end that extends into the nozzle hole to form an annular gap for fuel injection (usually a single hole). The spray is hollow cone shaped and used for separated combustion chambers (such as the precombustion chamber and swirl chamber). It is anti clogging and has low injection pressure, which is common in gasoline engines or low-speed diesel engines.
Porous fuel injector: a variant of the porous type, with a number of holes ≥ 6 (such as 12 holes), to improve atomization fineness and distribution uniformity, used in direct injection gasoline engines (GDI) or high-efficiency diesel engines.
Ball valve/disc valve fuel injector: a structural variant (non mainstream nozzle classification), named after the shape of the valve core, emphasizing sealing and anti blocking characteristics, commonly seen in specific electronic fuel injection systems.
Centrifugal/Pneumatic Nozzle: Commonly used in aviation or industrial burners, relying on swirling or gas assisted atomization, not the mainstream nozzle type for automotive engines.
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