الوصف

Nozzel is the part of fuel injector of diesel engine which converts the liquid diesel into vapours and which further creates vapour pressure on the piston of the diesel engine and hence converts the linear motion into rotational motion. The efficiency of the diesel engine very much depends on the quality of the nozzel which is truely named as the heart of diesel engine. Its malfunctioning leads to smoke and wastage of diesel (as a fuel) in the engine.
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