METHOD FOR MEASURING THE FUEL PRESSURE IN AN INJECTION TRAIN OF AN INTERNAL COMBUSTION ENGINE

The injectors (6i) allocated to the cylinders are supplied with fuel by a common injection train and their opening time is calculated and controlled by a computer. According to the invention, a) any possible overlap in the opening time of at least two injectors (6i) is detected, b) in the absence of...

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Bibliographic Details
Main Authors TARROUX, FRANCIS, RENE, HENRI, HAUET, BERTRAND, AUBOURG, ALAIN
Format Patent
LanguageEnglish
French
Published 19.04.2001
Edition7
Subjects
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Summary:The injectors (6i) allocated to the cylinders are supplied with fuel by a common injection train and their opening time is calculated and controlled by a computer. According to the invention, a) any possible overlap in the opening time of at least two injectors (6i) is detected, b) in the absence of an overlap, the fuel pressure in the train outside the opening time of the injector concerned is determined, c) if an overlap is present, the pressure of the fuel when the injector concerned is opened is determined and d) the measurement established is corrected according to a predetermined variation in the pressure of the fuel caused by the injector(s) opening. Les injecteurs (6i) associés aux cylindres sont alimentés en carburant par une rampe d'alimentation commune et leur temps d'ouverture calculé et commandé par un calculateur. Suivant l'invention, a) on détecte un recouvrement éventuel des temps d'ouverture d'au moins deux injecteurs (6i), b) en l'absence d'un tel recouvrement, on relève la pression du carburant dans la rampe en dehors du temps d'ouverture de l'injecteur considéré, c) en présence d'un tel recouvrement, on relève la pression du carburant à l'ouverture de l'injecteur considéré, et d) on corrige la mesure relevée en fonction d'une variation prédéterminée de la pression de carburant, induite par l'ouverture du ou des injecteurs.
Bibliography:Application Number: WO2000FR02778