What is nozzle opening pressure?

The nozzle opening pressure of fuel injection systems affects the initial fuel atomization, the fuel injection quantity, the emission characteristics and the operation stability of diesel engines. Based on this model, the effects of some factors on the nozzle opening pressure are analysed.

What is injector opening pressure?

The injector opening pressure (IOP) is varied from 200 bar (manufacturer specified value) to 260 bar in steps of 20 bar. The combustion parameters of HOME (IOP 260 bar) are found to be very close to ND. For other IOPs, these combustion parameters deviated compared to ND. For other IOPs, BTE is inferior compared to ND.

What is the effect to an engine if the opening pressure of an injection nozzle is very high?

An injection pressure increase enhances mixture formation as well as combustion. Decreasing the hydraulic flow rate, by means of reducing spray hole orifice diameter, affects mixture formation primarily through improved gas entrainment processes.

How is injector nozzle opening pressure tested?

The nozzle opening pressure is determined by the dimensions of the pressure stage of the nozzle and the rigidity of the injector spring. When the value of the pressure stage has been determined, the nozzle opening pressure can be most precisely set by the choice of the injector spring.

What is difference between injector and nozzle?

As nouns the difference between injector and nozzle is that injector is any of various devices that are used to inject something while nozzle is a short tube, usually tapering, forming the vent of a hose or pipe.

What is difference between nozzle and injector?

What pressure do diesel injectors work at?

In many cases, the injector is mounted just like a spark plug would be in a gas engine. But unlike fuel-injected gas engines that inject fuel at 10-60 psi, diesel fuel-injection systems run in the 10,000-30,000-psi range.

What is the function of nozzle in diesel engine?

Functions of nozzle: 1) To atomize fuel by converting it in to fine droplets. 2) To convert pressure energy in to kinetic energy. 3) To inject the fuel at right quantity at right time with respect to load & speed of the engine.