A hybrid design 'Strigear' using one engine, two electric motors and a computer controlled manual type gearbox seems to offer power fuel consumption and higher acceleration for a given power rating of engine and electric motors. A comparison between a real Toyota Prius and a simulated Strigear version of a Volvo S80 indicates a significantly better acceleration (0 to 100 km/h in 8.2 against 13.4 sec.) and lower fuel consumption (3.8 litres/100 km against 5.1) even though the Strigear is heavier (1561 kg against 1340). The reason for this improvement could be unusually high values of two figures of merit for hybrid powertrains. The first figure of merit concems the average relative efficiency of the engine. For the I Strigear hybrid proposed in this paper, it is 94 - 96% of the engine efficiency at the optimum point. The second figure of merit concems the fraction of the engine energy that goes to the tires directly through mechanical means. For the hybrid solution proposed in this paper, it is around 72%. Strigear tends to give soft transients in engine torque. Both the engine torque and engine speed transients can be limited by the controller software. The engine can therefore be run with slow transients. This would permit more exact control of emissions and torque from the engine. It would also create a comparatively easy environment for homogenous-charge compression ignition (HCCI) engines, which so far have difficulties in transient load handling. The system can be designed so that it will operate, although with lower performance, even if the electrical components of the hybrid power train should fail.


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    Title :

    Clutch configured serial/parallel hybrid


    Additional title:

    Serieller/paralleler Hybridantrieb mit Kupplung


    Contributors:


    Publication date :

    2001


    Size :

    9 Seiten, 4 Bilder, 1 Tabelle, 2 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    Clutch configured serial/parallel hybrid

    Stridsberg, L. / European Electric Road Vehicle Association | British Library Conference Proceedings | 2001


    Clutch Configured Serial/Parallel Hybrid

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    Clutch configured serial/parallel hybrid

    Stridsberg,L. / Stridsberg Powertrain,SE | Automotive engineering | 2001


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