On November 14th, 2011, the ISO 26262 standard entitled, 'Road vehicles - Functional safety' was published and introduced a new state of the art in technical development in the area of functional safety in automotive design. Before the document was published, however, electrical and electronics systems had already been developed to also provide functional safety in vehicle applications. One example of this is the EGAS system, which assumed active electronic control of the accelerator pedal and was implemented on a large scale from the end of the 1980s. When this system was launched, it already encompassed safety mechanisms that are still relevant today. The ISO 26262 standard therefore does not represent the starting point of functional safety in automotive engineering. Publication of the standard does, however, mean that developers must determine whether the new normative specifications can lead to opportunities or perhaps further modifications to current electrical and electronics systems and their development processes. During this presentation, the auditorium will be introduced to a specific safety concept that can be applied to conventional combustion engines. The EGAS system can also be made available to colloquium participants for demonstration purposes. Drive architectures have changed significantly with the introduction of hybrid and electric drivetrains. These changes bring with them new risks and require new safety concepts to counteract them. The results of the 'EGAS working group' are based on many years of experience in developing EGAS monitoring systems. Different solutions for monitoring approaches do not offer the possibility of brand differentiation. Standardization is therefore beneficial for all OEMs involved. Following the publication of ISO 26262, the 'EGAS monitoring concept specification' was adapted to the general requirements defined by the ISO 26262 standard and became ISO 26262 compliant as a result. The monitoring concept is based on a 3-level approach that takes into account sensors and actuators for safety-related applications that can be checked for plausibility. A key element for torque monitoring, which consists of a comparison of 'permissible torque' and current 'actual torque', was integrated. The '3-level monitoring concept' has formed an integral part in propulsion control systems used for transmissions and electric motors, for example. The 3-level monitoring concept has been widely used for networked control components with the introduction of hybrid powertrains. The variety of potential hybrid systems available currently necessitates a standardization of safety objectives, while the functional and technical safety concepts derived require system-specific analysis and targeted implementation.


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    Titel :

    Presentation of an ISO 26262-compliant monitoring concept for propulsion systems


    Beteiligte:
    Rehm, Lothar (Autor:in) / Nägler, Heinrich (Autor:in) / Möllmann, Jörg (Autor:in) / Staib, Thomas (Autor:in) / Veldten, Burhard (Autor:in)


    Erscheinungsdatum :

    2013


    Format / Umfang :

    18 Seiten, 11 Bilder, 1 Quelle



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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