Global Patent Index - EP 0727576 B1

EP 0727576 B1 2000-05-17 - Process for detecting error conditions in diesel injection devices

Title (en)

Process for detecting error conditions in diesel injection devices

Title (de)

Verfahren zum Ermitteln von Fehlerzuständen von Dieseleinspritzanlagen

Title (fr)

Procédé de détection de conditions d'erreur de dispositifs d'injection diesel

Publication

EP 0727576 B1 (DE)

Application

EP 95120213 A

Priority

DE 19505786 A

Abstract (en)

[origin: EP0727576A1] The waveforms of pressure at the injectors (1.1a-1.1d) of the four cylinders are detected e.g. by piezoelectric transducers clamped to the injection lines close to the nozzles. The detected waveform for each individual injector is normalised w.r.t. a standard curve and evaluated by comparison. Cross-correlation is performed between discrete values of the waveform sampled at regular intervals. Temporally matched individual injections are extracted from maxima of the cross-correlation function, and matched in terms of amplitude to the standard curve by linear regression.

IPC 1-7 (main, further and additional classification)

F02M 65/00

IPC 8 full level (invention and additional information)

F02M 65/00 (2006.01)

CPC (invention and additional information)

F02M 65/003 (2013.01)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family

EP 0727576 A1 19960821; EP 0727576 B1 20000517; CN 1061737 C 20010207; CN 1135575 A 19961113; DE 19505786 A1 19960822