Experimental Comparison of Hub- and Roller-Type Chassis Dynamometers for Vehicle Exhaust Emissions

Barouch Giechaskiel, Fabrizio Forloni, Marcos Otura, Christian Engström and Per Öberg
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Barouch Giechaskiel: European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy
Fabrizio Forloni: European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy
Marcos Otura: European Commission, Joint Research Centre (JRC), 21027 Ispra, Italy
Christian Engström: Rototest Europe, SE-144 40 Rönninge, Sweden
Per Öberg: Rototest Europe, SE-144 40 Rönninge, Sweden

Energies, 2022, vol. 15, issue 7, 1-15

Abstract: The emissions of vehicles are measured in laboratories with roller-type chassis dynamometers, which simulate road driving resistances. Hub-coupled dynamometers, which are not included in the regulations for emission measurements, are commonly used for research and development purposes, for example, to assess powertrain capabilities, simulate on-road trips, and calibrate the control of individual wheels. As they do not need particular infrastructure and offer a wider range of applications, they could be a more economical alternative, especially if they could also be used for emission measurements for the type approval of vehicles. Nevertheless, the two types have not been directly compared in the literature, and, thus, their equivalency, especially regarding emission measurements, is not known. In this study, the emissions of a diesel and a gasoline plug-in vehicle were compared using the same analytical equipment and by switching only the roller and hub dynamometers. The diesel vehicle was further tested on a second roller-type dynamometer with the same driver and a second driver. The results of the two dynamometer types were very close, even though the repeatability of the measurements was very narrow. The main message of this work is that hub-type dynamometers can be used interchangeably with roller-type dynamometers. The points that need to be addressed, such as the determination of dynamic wheel radius and tire slip level, are also discussed.

Keywords: vehicle emissions; CO 2; chassis dynamometer; roller dynamometer; hub dynamometer; rotational mass; tire slip; dynamic radius (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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