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On the efficiency of a prototype continuous variable transmission system

In this paper we explore the performance capabilities of a new variable transmission system installed on a low fuel consumption, zero emission, prototype urban vehicle. Our focus is on measuring the efficiency of the continuous variable transmission system, namely, the Electronic Shift Variable Transmission (ESVT), which is presented here in a lightweight conceptually simple design as part of the powertrain of a hydrogen fuel cell powered urban vehicle, developed at the Technical University of Crete. To evaluate ESVT's operational ability, a laboratory testbed was developed, mainly to imitate full scale driving conditions in terms of power needs for various external loads. Testbed's configuration and experimental measurements are presented, providing insight on technical characteristics and limitations of the proposed prototype transmission.