Power flows and efficiency in infinitely variable transmissions

Mangialardi, L.; Mantriota, Giacomo

doi:10.1016/s0094-114x(98)00089-5

Cited by 66 publications

(41 citation statements)

References 9 publications

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“…However, it has been shown that this type of flow occurs only when the ratio range of PS-CVT is smaller than the CVT [25]. Hence, its study has largely been neglected [14,15,26,27]. Nevertheless, as the results will indicate, the optimal designs satisfy this condition.…”

Section: Ps-cvt Architecturesmentioning

confidence: 97%

“…Mangialardi et al [14] derived the necessary equations to calculate the efficiency of type I and II flows. Their study showed that series configuration is more beneficial and type I flow leads to better results in terms of efficiency.…”

Section: Ps-cvt Architecturesmentioning

confidence: 99%

“…The losses in FR can be assumed to be constant [14], thus its efficiency is set to 98%. However, PG and CVT have more complex behaviors in terms of loss.…”

Section: Ps-cvt Architecturesmentioning

confidence: 99%

“…In order to improve these weaknesses, a fixed ratio (FR) mechanism and planetary gear train (PG) can be used in conjunction with CVT. This type of transmission is known as a power-split continuously variable transmission (PS-CVT) and can perform better than the single CVT in certain operating conditions [14]. Bottiglione et al [15] studied this type of transmission for a BEV.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of multiple transmission layouts for minimal energy consumption of a battery electric vehicle

2018

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Abstract.Battery electric vehicles (BEVs) are a promising solution for reducing the impacts of passenger vehicles on the environment. However, their driving range is restricted due to the limitations of battery technologies. This range can be extended by adoption of multiple-speed transmissions. Most of the comparisons in the related studies are based on non-optimal designs or limited to modal driving cycles. Furthermore, the impact of power-split continuously variable transmission (PS-CVT) layout with type III power flow on the power consumption of BEVs has never been examined. In this paper, single, two and three-speed transmissions along with PS-CVTs with type I and III power flows are optimized for a case study BEV. Furthermore, the effect of push belt and fulltoroidal CVTs in construction of PS-CVT are compared. The results demonstrate that a PS-CVT with type I power flow equipped with the full-toroidal CVT has the best performance. However, it reduces the energy consumption by 0.36% compared to the optimal two-speed layout. In addition, its ratio range is more limited which can negatively impact the dynamic performance. Finally, simulation of the optimal designs along a different cycle proves that the obtained results are consistent, regardless of the driving cycle.

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Section: Ps-cvt Architecturesmentioning

confidence: 97%

Section: Ps-cvt Architecturesmentioning

confidence: 99%

“…The losses in FR can be assumed to be constant [14], thus its efficiency is set to 98%. However, PG and CVT have more complex behaviors in terms of loss.…”

Section: Ps-cvt Architecturesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimization of multiple transmission layouts for minimal energy consumption of a battery electric vehicle

2018

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“…MANGIALARDI [15] used static behavior instead of dynamic behavior in each operating condition when he was analyzing infinitely variable transmission's torque ratio and efficiency performance. But in practical applications, dynamic behavior is different from static behavior, it is improper to replace dynamic process with static solution.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Analysis of planetary Gear Train with Two Degrees of Freedom

Xu¹,

Liu²,

Cui³

et al. 2016

Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnolog

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Abstract. Dynamic analysis method is used in this paper to analyze the dynamic response of planetary gear train with two degrees of freedom under the conditions of the start-up and load step change during operation. The results show that the angular velocity relationship between the components under steady-state and non steady-state conditions follows the rules of characteristic parameters, k. The torque follows the rules related to the k only under the steady-state, but not consistent under the non-steady state conditions. The results also show that the power distribution ratio of differential gear train is not a fixed parameters value, but relevant to the operation status. The research further improved the basic gear train's translation theory.

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