A number of start-stop systems rely on 42-volt architecture, but since the introduction of the higher voltage system is being continually delayed, Visteon has been developing one that operates with 12 volts. Called SpeedStart 12, the company claims that its Integrated Starter Generator (ISG) offers many advantages over everything else that has been seen. Measuring 146 mm x 156 mm, which is roughly the same size as a medium frame alternator, Visteon's SpeedStart 12 ISG basically comprises a compact belt-driven starter generator that incorporates the motor and power electronics in one unit thereby eliminating the starter motor, alternator, standard battery and belt system and, in some cases, the starter ring gear. Weighing 11 kg, it integrates the starter with the car's alternator and requires an upgraded belt system and a 12-volt VRLA (Valve Regulated Lead Acid) battery. When questioned about the start-stop system entirely depending on a dependable battery that would not suddenly fail. The battery management system will virtually eliminate a car not starting as the battery charge and health will be monitored and controlled. Should it be coming to the end of its life, the system can bring that to the attention of the driver before it fails. Cooling the ISG is also an issue. The ISG requires consistent thermal cooling, Visteon opted to take the coolant from the engine by means a simple T-insertion. Visteon has worked this system so that stepping on the brake consistently and with a certain amount of force causes the engine to cut out. Unlike other systems, it can still remain in gear although it was a natural thing to move the gear lever to neutral even while the engine was cutting out. The end result, is a five percent fuel economy improvement according to NEEDC (New European Drive Cycle) figures and a 20 percent efficiency improvement compared to current alternators while delivering up to 3 kW continuous generation. It therefore opens the door for other automotive technologies that require higher power. It has more cranking power and torque for premium, large displacement gasoline engines and with the ability to operate at -30degC, it enables the deletion of a starter motor for gasoline engine applications up to 3.0 litres. Finally, the SpeedStart 12 is also fully integrated and easy to package even in the tight space of the engine compartment. If there is one drawback, it is one that has yet to be overcome with this system, and that is the ability to power all the systems like headlamps when in use, the air conditioning system and other power functions without the need for the engine to continue running.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    All quiet on the urban front


    Erschienen in:

    Automotive Engineer ; 28 , 8 ; 38-41


    Erscheinungsdatum :

    2003


    Format / Umfang :

    2 Seiten, 3 Bilder



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    It's quiet in front

    TOPLIS, A. / CICCI, F. | AIAA | 1973


    EVA quiet on home front

    Online Contents | 1996


    Quiet urban air delivery system

    SEELEY BRIEN AVEN | Europäisches Patentamt | 2021

    Freier Zugriff

    QUIET URBAN AIR DELIVERY SYSTEM

    AVEN SEELEY | Europäisches Patentamt | 2022

    Freier Zugriff

    Quiet urban air delivery system

    SEELEY BRIEN AVEN | Europäisches Patentamt | 2022

    Freier Zugriff