Various embodiments include a method for checking a variable valve lift control of an internal combustion engine comprising: during operation of the internal combustion engine, detecting a rotational speed of the internal combustion engine; and measuring an intake pressure in the intake tract of the internal combustion engine corresponding to the detected rotational speed. The method further includes: defining a reference frequency dependent on the rotational speed of the internal combustion engine; defining a comparison frequency as a non-integral multiple of the reference frequency; determining amplitudes of oscillations of the intake pressure at the reference frequency and amplitudes of oscillations of the intake pressure at the comparison frequency; and evaluating a ratio of the determined amplitudes and the respective absolute values.


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    Titel :

    Method for checking a variable valve lift control of an internal combustion engine


    Beteiligte:
    BUHL STEFAN (Autor:in)

    Erscheinungsdatum :

    06.09.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F01L CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES , Periodisch betriebene Ventile für Kraft- und Arbeitsmaschinen oder Kraftmaschinen






    Development of Continuously Variable Valve Lift Engine

    Han, Donghee / Ha, Kyoung-Pyo / Kim, Woo Tae | SAE Technical Papers | 2010


    Univalve - a fully variable mechanical valve lift system for future internal combustion engines

    Flierl,R. / Schmitt,S. / Kleinert,G. et al. | Kraftfahrwesen | 2011