Differentiated analysis of downsizing concepts

Königstein, Achim; Grebe, Uwe Dieter; Wu, Kevin; Larsson, Per-Inge

doi:10.1007/bf03227890

Cited by 35 publications

(14 citation statements)

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“…The efficiency contour map obtained with the process of Section 2 was used in the model, as well as efficiency map for a diesel engine without turbocompound (Figure 9a). In order to compare the powertrain efficiency with different engine configuration, spark-ignition engine efficiency map [43] was also used, which is reported in Figure 11, where also the operating points are shown. Regarding series architecture, a great downsizing of the ICE is possible, as shown in [18,22], and in this study a 40 kW ICE was considered.…”

Section: Vehicle Modellingmentioning

confidence: 99%

Turbocompound Power Unit Modelling for a Supercapacitor-Based Series Hybrid Vehicle Application

et al. 2020

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In this paper, starting from the measurements available for a 2000 cm3 turbocharged diesel engine, an analytical model of the turbocharger is proposed and validated. The model is then used to extrapolate the efficiency of a power unit with a diesel engine combined with a turbocompound system. The obtained efficiency map is used to evaluate the fuel economy of a supercapacitor-based series hybrid vehicle equipped with the turbocompound power unit. The turbocompound model, in accordance with the studies available in the technical literature, shows that the advantages (in terms of efficiency increase) are significant at high loads. For this reason, turbocompound introduction allows a significant efficiency improvement in a series hybrid vehicle, where the engine always works at high-load. The fuel economy of the proposed vehicle is compared with other hybrid and conventional vehicle configurations.

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Section: Vehicle Modellingmentioning

confidence: 99%

Turbocompound Power Unit Modelling for a Supercapacitor-Based Series Hybrid Vehicle Application

et al. 2020

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“…In Figure 8b, the ICE work points declared by Toyota are shown [16]. It is easy to notice how the optimization result is the same as that declared by Toyota, and it basically corresponds to the ICE efficiency maximization; in other terms, the electrical losses do not count in the optimization process (although they are not To evaluate the ICE efficiency, the spark ignition engine presented in [15] was considered; the fuel consumption data available in [15] were elaborated to obtain the efficiency map. This contour map is shown in Figure 5.…”

Section: Cvt Powertrain Efficiency Optimizationmentioning

confidence: 99%

“…To evaluate the ICE efficiency, the spark ignition engine presented in [15] was considered; the fuel consumption data available in [15] were elaborated to obtain the efficiency map. This contour map is shown in Figure 5.…”

Section: Electrical Losses and Internal Combustion Engine Modelingmentioning

confidence: 99%

Electrical-Loss Analysis of Power-Split Hybrid Electric Vehicles

et al. 2017

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Abstract:The growing development of hybrid electric vehicles (HEVs) has seen the spread of architectures with transmission based on planetary gear train, realized thanks to two electric machines. This architecture, by continuously regulating the transmission ratio, allows the internal combustion engine (ICE) to work in optimal conditions. On the one hand, the average ICE efficiency is increased thanks to better loading situations, while, on the other hand, electrical losses are introduced due to the power circulation between the two electrical machines mentioned above. The aim of this study is then to accurately evaluate electrical losses and the average ICE efficiency in various operating conditions and over different road missions. The models used in this study are presented for both the Continuously Variable Transmission (CVT) architecture and the Discontinuously Variable Transmission (DVT) architecture. In addition, efficiency maps of the main components are shown. Finally, the simulation results are presented to point out strengths and weaknesses of the CVT architecture.

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“…The spark-ignition engine presented in [14] was used as reference. In this study a 40 kW ICE was used (as reported in Section 2.3), therefore ICE [14] torque and speed were normalized in per units and the related efficiency (plotted in Figure 3) was considered in this study.…”

Section: Internal Combustion Enginementioning

confidence: 99%

Advantages of Using Supercapacitors and Silicon Carbide on Hybrid Vehicle Series Architecture

et al. 2017

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In recent years enormous growth has taken place in the hybrid vehicle sector; parallel architecture is the most widespread configuration regarding medium size cars. At the same time, storage systems and power electronics have experienced some important innovations. The development of supercapacitors has permitted management of high power with elevated efficiency. Moreover, the availability on the market of silicon carbide components has allowed a significant reduction of power electronic losses. These improvements may challenge the hybrid architecture used in medium size cars nowadays. On one hand, series architecture would relevantly benefit from an electric powertrain efficiency increase, on the other hand, these innovations would generate low benefits in parallel architectures. The aim of this paper is to evaluate electric component average efficiency over different road missions, in order to estimate fuel economy over various working conditions and finally to establish which hybrid configuration is most efficient in vehicle applications.

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Differentiated analysis of downsizing concepts

Cited by 35 publications

References 0 publications

Turbocompound Power Unit Modelling for a Supercapacitor-Based Series Hybrid Vehicle Application

Turbocompound Power Unit Modelling for a Supercapacitor-Based Series Hybrid Vehicle Application

Electrical-Loss Analysis of Power-Split Hybrid Electric Vehicles

Advantages of Using Supercapacitors and Silicon Carbide on Hybrid Vehicle Series Architecture

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