Method for setting the nozzle opening pressure for an...

Details Method for setting the nozzle opening pressure for an... Method for setting the nozzle opening pressure for an...

2005-12-20

2005-12-20

Williams, Hezron (Department: 2856)

Measuring and testing

Internal combustion engine or related engine system or...

Compression

Reexamination Certificate

active

06976389

ABSTRACT:
In order to set the nozzle opening pressure for an injection nozzle, in particular for a diesel injection nozzle, to an accuracy of around ±1%, the method provides that the injection needle is first pressed against the valve seat with a closing force (Fz), and then when two different test pressures (pU, p1, p2) are applied to the injection nozzle the test forces (Fz, F1, F2) effective on the injector needle are measured, with the pressure stage (A) being determined from the measured test forces and the test pressures applied, and finally using the pressure stage (A) a nozzle valve with a suitable valve spring force (Fv) is selected to correspond to the desired nozzle opening pressure (pD).

REFERENCES:
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patent: 2001/0027780 (2001-10-01), Rueger et al.
patent: 3830510 (1989-12-01), None
patent: 100 27 181 (2001-12-01), None

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