Development of a new hybrid bus for urban public transportation

Millo, Federico; Rolando, Luciano; Fuso, Rocco; Zhao, Jianning

doi:10.1016/j.apenergy.2015.03.131

Cited by 31 publications

(11 citation statements)

References 17 publications

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“…In both instances, both the next generation hybrid vehicles developed through this program are performing in line with average performance of all hybrid vehicles currently certified for Low Emission Bus status in the UK, demonstrating both the scalability of the performance of the hybrid powertrain to the higher vehicle mass range. It also confirms the findings of several theoretical studies which have hypothesized that the well-to-wheel savings achievable from the hybrid electric vehicle powertrains are likely to provide the best solution in the short to medium term [14,15]. These achievements have been made without the need for additional infrastructure, without the range or terrain issues associated with other technologies, and at a comparatively lower cost than other alternative powertrains.…”

Section: Figure 19 -Relationship Between Gross Vehicle Mass and Wtw Gsupporting

confidence: 85%

Modelling and Control of a Hybrid Urban Bus

Murtagh¹,

Early²,

Stevens³

et al. 2019

SAE Technical Paper Series

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Section: Figure 19 -Relationship Between Gross Vehicle Mass and Wtw Gsupporting

confidence: 85%

Modelling and Control of a Hybrid Urban Bus

Murtagh¹,

Early²,

Stevens³

et al. 2019

SAE Technical Paper Series

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“…Hybrid urban buses are considered as one such option, with the main reduction in costs expected from a decreased fuel consumption (FC) over conventional buses. Powertrain simulation results indicate that both parallel and series hybrid systems can offer fuel economy benefits up to 45% over conventional buses [11][12][13][14]. Results from experimental assessments vary.…”

Section: Introductionmentioning

confidence: 99%

Real-World Measurement of Hybrid Buses’ Fuel Consumption and Pollutant Emissions in a Metropolitan Urban Road Network

et al. 2018

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This study investigates pollutant emissions and fuel consumption of six Euro VI hybrid-diesel public transport buses operating on different scheduled routes in a metropolitan urban road network. Portable emission measurement systems (PEMS) are used in measurements and results are compared to those obtained from a paired number of Euro V conventional buses of the same body type used as control over the same routes. The selected routes vary from urban to highway driving and the experimentation was conducted over the first half of 2015. The available emissions data correspond to a wide range of driving, operating, and ambient conditions. Fuel consumption, distance- and energy-based emission levels are derived and presented in a comparative manner. The effect of different factors, including speed, ambient temperature, and road grade on fuel consumption and emissions performance is investigated. Mean fuel consumption of hybrid buses was found 6.1% lower than conventional ones, from 20% lower up to 16% higher, over six routes tested in total. The mean route difference between the two technologies was not statistically significant. Air conditioning decreased consumption benefits of the hybrid buses. Decrease of the mean route speed from 15 km h−1 tο 8 km h−1 increased the hybrid buses consumption by 63%. Nitrogen oxides (NOx) emissions of the Euro VI hybrid buses were 93 ± 5% lower than conventional Euro V ones. Nitrous oxide (N2O) emissions from hybrid Euro VI buses made up 5.9% of total greenhouse gas emissions and largely offset carbon dioxide (CO2) benefits. The results suggest that hybrid urban buses need to be assessed under realistic operation and environmental conditions to assess their true environmental and fuel consumption benefits.

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“…For example, Zhu et al have designed a HEV powertrain with a single electric machine and two planetary gears [16]. Millo et al developed models and a prototype for an urban hybrid bus [17]. Bougrine et al applied a chemistry-based method and simulated CO and NO emissions models [18].…”

Section: Introductionmentioning

confidence: 98%