Method of customizing rail pressure in common-rail injection system of motor vehicle, involves adjusting actual course of injection flow to standard curve corresponding to rail pressure change

• Main Authors: MEYER, TORSTEN, SCHUELLER, MICHAEL
• Format: Patent
• Language: English; German
• Published: 31.07.2014
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The method involves calculating a viscosity of a fuel injected by a fuel injector based on a temperature-dependent behavior of an armature during a control device initialization. The calculated viscosity in a model is associated with a rail pressure change, such that an actual course of the injection flow is adjusted to a standard curve corresponding to the rail pressure change. The calculated viscosity in the model is updated depending on an engine operation. An independent claim is included for an arrangement for adjusting a rail pressure. Es werden eine Verfahren und einen Anordnung zum Anpassen eines Raildrucks vorgestellt. Das Verfahren dient zum Anpassen eines Raildrucks in einer Einspritzanlage eines Kraftfahrzeugs unter Berücksichtigung einer Viskosität eines mittels mindestens einen Injektors einzuspritzenden Kraftstoffs, bei dem aus einem Schließdauerverhalten eines Ankers des mindestens einen Injektors die Viskosität des Kraftstoffs berechnet wird, und wobei die berechnete Viskosität in einem ersten Modell einer Raildruckänderung zugeordnet wird.