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Kaupunkibussien Polttoaineenkulutus ja Pakokaasupaastot: Uusimman Dieseltekniikan Suorituskyky (Fuel Consumption and Exhaust Emissions of Urban Buses: Performance of Newest Diesel Technology)
| 题名： | Kaupunkibussien Polttoaineenkulutus ja Pakokaasupaastot: Uusimman Dieseltekniikan Suorituskyky (Fuel Consumption and Exhaust Emissions of Urban Buses: Performance of Newest Diesel Technology) |
| 作者： | Nylund, N. O.; Erkkila, K.; Hartikka, T. |
| 关键词： | Fuel consumption##Exhaust emissions##Performance##Measurements##Finland##Public transport##Urban transport##Vehicles##Operating expenses## |
| 摘要： | The research was carried out by the Finnish Public Transport Association. Altogether seven vehicles were measured, two two-axle Euro 3 -class vehicles as references (Scania and Volvo), three new Euro 4 -class vehicles (Mercedes-Benz, Scania and Volvo) and two new three-axle vehicles (Euro 4 Scania and Euro 5 Volvo). The measurements were carried out on a chassis dynamometer, using three cycles describing actual driving. In addition to fuel consumption, exhaust emissions were also recorded for these vehicles. The differences in fuel consumption and operating expenses were after all smaller than first anticipated. When it comes to the Euro 3 -class reference vehicles, Volvo consumes 7.10% more fuel than Scania. For new two-axle vehicles the difference in fuel consumption, when simulating urban driving, is only 3.4%. Due to different technical solutions, the results were anticipated to be greater. In suburban driving although, the difference is at its most 11%. The Volvo Euro 4 -bus has in average the lowest fuel consumption. Looking at the three-axle vehicles, Scania consumes 3.5% less fuel than does Volvo. The measurements do not give an unambiguous answer to whether the EGR- or SCRtechnology is preferable regarding fuel consumption. The contemplation is hindered by two factors. On one hand, the order of superiority depends on the driving cycle, on the other, the actual exhaust emissions do not match with expectations. Scania.s Euro 4 -engines produce higher NOx-emissions than its Euro 3 -engine. The fuel efficient Volvo Euro 4 -engine is not truly Euro 4 -class what comes to NOx-emissions. The Mercedes- Benz Euro 4- and Volvo Euro 5 -engines produce NOx-emissions genuinely matching their classes. Both fuel consumption and exhaust emissions have been observed in the study. In case exhaust emissions were completely disregarded, fleet decisions might be directed towards fuel efficient vehicles which after all do not reach the level of emission performance that reasonably could be expected. |
| 总页数： | 56 |
| 报告类型： | 科技报告 |
相关文献
- Kaupunkibussien Polttoaineenkulutus ja Pakokaasupaastot: Uusimman Dieseltekniikan Suorituskyky (Fuel Consumption and Exhaust Emissions of Urban Buses: Performance of Newest Diesel Technology). Research note.
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