A brief historical account of the evolution of continuously variable transmissions (CVT) for automotive use is given. CVT concepts which are potentially suitable for application with electric and hybrid vehicles are discussed. The arrangement and function of several CVT concepts are cited along with their current developmental status. The results of preliminary design studies conducted under contract to NASA for DOE on four CVT concepts for use in advanced electric vehicles are discussed. For these studies a 1700 kg (3750 lb) vehicle with an energy storage flywheel was specified. Requirements of the CVTs were a maximum torque of 450 N-m (330 lb-ft), a maximum output power of 75 kW (100 hp), and a flywheel speed range of 14,000 to 28,000 rpm. System life was to exceed 2600 hours at a 90% probability of survival. Efficiency, size, weight, cost, reliability, maintainability, and controls were evaluated for each of the four concepts. (ERA citation 07:004572)


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    Title :

    Continuously Variable Transmission: Assessment of Applicability to Advanced Electric Vehicles


    Contributors:

    Publication date :

    1981


    Size :

    31 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






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