Injector nozzles are key components of CNG/LPG gas injectors. They perform the function of precisely metering the gas to each cylinder of the engine. Nozzles come in a variety of sizes so that the gas installation technician can regulate the gas supply to the cylinders even more precisely. Nozzles often need to be purchased separately, but sometimes (such as in the case of the injection bars from Italian manufacturer RAIL) they are already included in the kit with the bars.
What is the role of gas injector nozzles
Gas flow: Gas flows through the injector nozzle under pressure.
Flux shaping: The nozzle shapes the gas flow, ensuring that it is evenly distributed into the intake manifold or directly into the cylinder.
Gas dosage: The size and shape of the nozzle determine the amount of gas dispensed, which affects the dose of fuel delivered to the engine.
Types of injector nozzles
Calibrated nozzles: These have a well-defined bore size, ensuring precise gas dosage.
Adjustable nozzles: These allow the flow of gas to be adjusted by changing the bore size.
What LPG injector nozzles are made of
Brass: The most commonly used material, offering good value for money.
Stainless steel: Durable and corrosion resistant, but more expensive than brass.
Teflon: Used on some injector models, provides minimal friction and resistance to chemicals.
Important operating considerations
Injector nozzles should be matched to the type of injector and gas system.
Worn or damaged nozzles can cause engine problems such as loss of power, unstable revs, excessive gas combustion.
Regular inspection and cleaning of injector nozzles is recommended to ensure proper operation of the gas system.
