Method and device for diagnosing of a fuel supply system

Details Method and device for diagnosing of a fuel supply system Method and device for diagnosing of a fuel supply system

2005-06-07

2005-06-07

Pert, Evan (Department: 2829)

Measuring and testing

Internal combustion engine or related engine system or...

Compression

Reexamination Certificate

active

06901791

ABSTRACT:
The invention relates to a method and an arrangement for diagnosing a fuel supply system of an internal combustion engine. In order to make possible a differentiation of the fault with respect to individual components of the fuel supply system, a method is suggested which is characterized by the following steps: recording the trace of the fuel pressure in the fuel supply system (2); forming the frequency spectrum of the fuel supply trace (3); and, analyzing the frequency spectrum (4). The analysis of the frequency spectrum preferably includes the following steps: comparing the trace of the recorded frequency spectrum to the trace of the frequency spectrum of a fault-free operating fuel supply system at this operating point; and, in the event that deviations between the traces of the frequency spectra are present, classifying the deviations in accordance with the nature of the faults in the fuel supply system via which the deviations are caused.

REFERENCES:
patent: 5445019 (1995-08-01), Chui et al.
patent: 5499538 (1996-03-01), Glidewell et al.
patent: 195 20 300 (1996-12-01), None
patent: 195 48 279 (1997-04-01), None
patent: WO 99 45261 (1999-09-01), None

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