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Abstract
Hybrid electric vehicles (HEVs) and hybrid transmissions have been developed rapidly in recent decades. And, numerous designed hybrid transmissions are series-parallel hybrid systems. To come up with a novel design for such a system, this paper firstly utilizes a systematic design approach to synthesize 4 feasible configurations for series-parallel hybrid transmissions using a simple planetary gear train subject to concluded design specifications and design constraints. Then, based on specific desired design specifications, 8 alternative configurations are proposed. The new transmissions can provide series-parallel hybrid systems with ten clutching conditions that can be gathered into seven primary operation modes, namely, electric motor mode, HEV series mode, power mode, CVT/charging mode, engine mode, regenerative braking mode, and stationary charging mode. Finally, one of the new hybrid transmissions is selected as a numerical example to explain the working principle, and the kinematics, static torque and power flow of each operating mode are analyzed.
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Schedule a callMore From: The Proceedings of the JSME international conference on motion and power transmissions
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