Claims:We Claim:
1. A method (100) of testing a nozzle of a fuel injector, said fuel injector adapted to be mounted on an engine, said method comprising:

receiving (102), said nozzle of said fuel injector on a test bench;

subjecting (104), said nozzle to non-destructive testing;

receiving (106), by a processor, a microstructure of hardened zone and tempered zone of said nozzle; and

checking (108), by said processor a defect in said nozzle.

2. The method of claim 1, further comprising subjecting said nozzle to incremental magnetic permeability test.
, Description:Complete Specification:

The following specification describes and ascertains the nature of this invention and the manner in which it is to be performed.
Field of the invention
[0001]This invention to the field of testing of a nozzle of a fuel injector.

Background of the invention
[0002]A nozzle is used in a fuel injector for injecting fuel into the engine cylinder. The stability of nozzle plays an important role in the life of the fuel injector. The nozzle is ground by machining process. If one of the machining process is miscarried, the microstructure & the residual stresses are changed in the surface zones of the nozzle. In the conventional testing the nozzle is cut open to check for defects resulting in wastage of nozzle and the fuel injector.

Brief description of the accompanying drawing
[0003] Different modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawing:

[0004] FIG. 1 illustrates a method of testing a nozzle of a fuel injector.

Detailed description of the embodiments
[0005] FIG. 1 illustrates a method of testing a nozzle of a fuel injector. The method comprises receiving (102), the nozzle of the fuel injector on a test bench. At step 104, the nozzle is subject to non-destructive testing. The microstructure of hardened zone and tempered zone of the nozzle is received by a processor. Based upon the microstructure, the processor checks 108 for defects in the nozzle. In an embodiment the nozzle is subject to incremental magnetic permeability test.

[0006]The incremental permeability can be measured with the conventional eddy current equipment with & without a magnetic field excitation. The nozzle then undergoes cyclic magnetization. This magnetization is superimposed an alternating magnetic field in a wide frequency range from 10kHz up to 35MHz. The measured probe impedance variations of the magnetic permeability of the test object can be recorded & co-related with the impedance during the magnetic excitation.

[0007] ‘Adapted’ or ‘arranged’, in the context of the instant disclosure, refers to the technical capability or the technical capacity of a component, in relation to which the term ‘adapted’ or ‘arranged’ is used, to carry out or executed a specified action or actions, upon the requirement of the specified action or actions to be carried out or executed. Moreover, the usage of the term ‘adapted’ or ‘arranged’ here, is in reference with the normal technical capability or technical capacity of the component, imparted by the design or the structure or the composition of the component, and not in reference with any special or extraneous capability or capacity, beyond the scope of the normal technical capability or technical capacity. Therefore there is a need to address this problem.

[0008]It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention in terms of the type of high pressure nozzle used. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.