On-Road Test and Evaluation of Emissions and Fuel Economy of the Hybrid Electric Bus

Qin, Kongjian; Li, Mengliang; Gao, Jian; Gao, Jidong; Ai, Yi

doi:10.4271/2009-01-1866

Cited by 10 publications

(2 citation statements)

References 3 publications

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“…In a series HEV, the thermal (diesel) engine, coupled with a brushless electric generator (the couple is named the Auxiliary Power Unit (APU)), is used to generate electricity with an almost constant power and with optimal efficiency, whereas an electric motor generator is used for traction and regenerative braking, and the battery pack is used as an energy buffer. Simulations and field tests measurements [3][4][5][6][7][8][9] show that HE buses can give fuel economy benefits ranging from 24.8% to 66% with respect to traditional diesel engine-powered buses. Such a huge variability in terms of fuel economy is due to a large number of parameters playing an important role in determining the actual fuel consumption, such as the number of stops per unit distance, the road grade, surrounding traffic volume and conditions, environmental conditions, driving style, type of hybrid technology, roadway type, passenger load and plug-in capabilities.…”

Section: Introductionmentioning

confidence: 99%

The Fuel Economy of Hybrid Buses: The Role of Ancillaries in Real Urban Driving

et al. 2014

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In the present context of the global economic crisis and environmental emergency, transport science is asked to find innovative solutions to turn traditional vehicles into fuel-saving and eco-friendly devices. In the last few years, hybrid vehicles have been shown to have potential benefits in this sense. In this paper, the fuel economy of series hybrid-electric and hybrid-mechanical buses is simulated in two real driving situations: cold and hot weather driving in the city of Taranto, in Southern Italy. The numerical analysis is carried out by an inverse dynamic approach, where the bus speed is given as a velocity pattern measured in the field tests performed on one of the city bus routes. The city of Taranto drive schedule is simulated in a typical tempered climate condition and with a hot temperature, when the air conditioning system must be switched on for passenger comfort. The fuel consumptions of hybrid-electric and hybrid-mechanical buses are compared to each other and with a traditional bus powered by a diesel engine. It is shown that the series hybrid-electric vehicle outperforms both the traditional and the mechanical hybrid vehicles in the cold weather driving simulation, reducing the fuel consumption by about 35% with respect to the traditional diesel bus. However, it is also shown that the performance of the hybrid-electric bus gets dramatically worse when the air-cooling system is continuously turned on. In this situation, the fuel consumption of the three different technologies for city buses under investigation is comparable.

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Section: Introductionmentioning

confidence: 99%

The Fuel Economy of Hybrid Buses: The Role of Ancillaries in Real Urban Driving

et al. 2014

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“…There are many possible ways of evaluating the data derived from a test and for extracting conclusions by means of the use of statistical tools. For the evaluation of the mean value, the parameters registered or calculated along the route tested have been the most commonly used tool during comparative studies (Van Poppel and Lenaers 2005, Cocker et al 2004, Pelkmans and Debal 2006, Frey et al 2007, Ropkins et al 2007, Durbin et al 2007, Qin et al 2009, López et al 2009. Mean values provide global information about a studied parameter but this information depends on many uncontrolled factors.…”

Section: Introductionmentioning

confidence: 99%

Methodology for the analysis of pollutant emissions from a city bus

Armas¹,

Lapuerta²,

Mata³

2012

Meas. Sci. Technol.

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In this work a methodology is proposed for measurement and analysis of gaseous emissions and particle size distributions emitted by a diesel city bus during its typical operation under urban driving conditions. As test circuit, a passenger transportation line at a Spanish city was used. Different ways for data processing and representation were studied and, derived from this work, a new approach is proposed. The methodology was useful to detect the most important uncertainties arising during registration and processing of data derived from a measurement campaign devoted to determine the main pollutant emissions. A HORIBA OBS-1300 gas analyzer and a TSI engine exhaust particle spectrometer were used with 1 Hz frequency data recording. The methodology proposed allows for the comparison of results (in mean values) derived from the analysis of either complete cycles or specific categories (or sequences). The analysis by categories is demonstrated to be a robust and helpful tool to isolate the effect of the main vehicle parameters (relative fuel–air ratio and velocity) on pollutant emissions. It was shown that acceleration sequences have the highest contribution to the total emissions, whereas deceleration sequences have the least.

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Novel evaluation method of fuel consumption and emission for heavy-duty hybrid electric vehicles

Yan

Zhang

et al. 2014

Int.J Automot. Technol.

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On-Road Test and Evaluation of Emissions and Fuel Economy of the Hybrid Electric Bus

Cited by 10 publications

References 3 publications

The Fuel Economy of Hybrid Buses: The Role of Ancillaries in Real Urban Driving

The Fuel Economy of Hybrid Buses: The Role of Ancillaries in Real Urban Driving

Methodology for the analysis of pollutant emissions from a city bus

Novel evaluation method of fuel consumption and emission for heavy-duty hybrid electric vehicles

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