Diesel Injector Fuel Injector 095000-6693 Denso Injector for Nissan

The shaft needle nozzle has only one hole, and the hole is large. The size of the hole area depends on the maximum amount of oil injected into the cylinder for each cycle of the diesel engine, the duration of the injection and the injection pressure. For the orifice nozzle, when the orifice area is certain, whether the diameter of the orifice and the size of the spray cone Angle can adapt to the requirements of the form of the combustion chamber of the diesel engine and the form of the mixture, it must be determined by repeated experiments. For example: the combustion chamber of 4125A, 4115T diesel engine is vortex chamber type, it matches the nozzle couple for ZS15S15, 135 series diesel engine combustion chamber is "ω" type direct injection type, it matches the nozzle couple for ZCK150S435 type.

The size of the nozzle lift should ensure that there is enough flow area when the oil is injected. Generally speaking, after the flow area is determined, the needle valve lift should be as small as possible, because after the lift increases, the impact force will increase when the needle valve is set at the end of the oil injection, and the sealing part will accelerate wear. At the same time, because the setting time is prolonged, it will increase the gas backflow into the nozzle. Once the gas enters the needle valve couple, the needle valve couple will be polluted, the tightness will be reduced, and the drip will make the needle valve couple and the combustion chamber produce carbon deposit. Therefore, for each injector, there should be an optimal needle valve lift determined by repeated experiments.