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The design of a hybrid/electric powered bus is presented including the specifications of the major components and drive train layout. Results of computer modelling on vehicle performance are presented for the hybrid/electric bus. In addition to the details of the hybrid/electric bus design and performance a description of the Brassboard, the test fixture developed to allow the entire drive system be tested prior to installation in the bus, is presented.

The design and predicted performance of a hybrid electric powered transit bus is described. The bus is a 7.6 meter (25 ft), 24 passenger vehicle that incorporates a low floor design and rear door accessible to handicap passengers. The low floor and rear door are made possible by the use of individual high power density permanent magnet motors driving the rear wheels. The hybrid electric drive system consists of a compressed natural gas fueled internal combustion engine that drives a generator which in conjunction with storage batteries supply power to the two traction motors.