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Performance and Efficiency of HEV innovative Transmission systems by Simulation techniques

机译：混合动力汽车创新传动系统的性能和效率仿真技术

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The present work is related to the simulation of several HEV (Hybrid-Electric-Vehicle)-rnparallel mechanical transmission solution.rnFirstly a particular transmission by planetary gear, with two input shafts, was simulated usingrnMatlab? Simulink? software. Two models were used: the first one for the global performance andrnfuel consumption in the urban driving cycle and the other one to investigate the clutch transients forrnelectrical and hybrid mode shifting. We can expect an experimental activity in the next few months forrnthis transmission.rnThen the efficiency of transmission with mechanical Continuously Variable Transmissionsrn(CVT) was investigated, in the forward and reverse working condition (i.e. the regenerating brakingrnefficiency), since it is supposed to affect the global fuel consumption, particularly in the urban drivingrncycle. This aspect is rarely considered in literature and could be useful for transmission selectingrncriteria.rnA CVT units is analysed in a coupled to a planetary gear scheme. Planetary gears are used tornextend the CVT’s transmission ratio range up to zero value (i.e. stopped outlet shaft) and even tornnegative ratios corresponding to reverse operating mode.rnThe possibility of replacing the clutch equipment with such transmission group is alsorninvestigated. This solution may allow to avoid clutch losses at the vehicle start, providing more powerrnfor the start-up. Furthermore all the cycle phases, such as start, running etc., can be controlled by onlyrnone parameter: the transmission ratio.
机译：目前的工作与几种混合动力汽车混合动力传动系统解决方案的仿真有关。首先，使用rnMatlab模拟具有两个输入轴的行星齿轮传动的特定传动系统。 Simulink？软件。使用了两种模型：第一种模型用于全球性能和城市驾驶循环中的燃料消耗，另一种模型用于研究电动和混合模式换挡的离合器瞬变。我们可以期望在接下来的几个月中进行这种变速箱的试验活动。然后，在正向和反向工作状态（即再生制动效率）下，研究了机械无级变速箱rn（CVT）的变速箱效率，因为它会影响全球燃油消耗，特别是在城市驾驶中。这方面在文献中很少被考虑，并且对于变速器选择标准可能是有用的。CVT单元在耦合到行星齿轮方案的情况下被分析。行星齿轮被用于将CVT的传动比范围扩大到零值（即，出口轴停止），甚至将反向传动模式对应的负传动比也扩大到零。此外，还研究了用这种变速器组更换离合器设备的可能性。该解决方案可以允许避免车辆起动时的离合器损失，从而为起动提供更大的动力。此外，所有循环阶段，例如开始，运行等，都可以通过唯一的参数（传动比）进行控制。

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