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Conferance Paper - Essay Example

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Conferance Paper

This paper documents the early stages of a research project which aims to segment the Standard Drive Cycle definitions into a series of operating characteristic windows which can then be searched for and automatically extracted from general driving behaviour of a car on the road, and thereafter concatenated to re-creating a real-world equivalent of the Standard Drive Cycle without the need for rolling road or laboratory testing. 1 Introduction Fuel economy has risen to prominence in recent years and most automobile markets require adherence to local fuel economy standards. It has been realised that fuel economy figures importantly to reduce carbon dioxide emissions and to deal with energy conservation. Globally, the need for oil has been on the increase even though there is a global economic recession (An et al., 2011, p.1). The measurement of fuel economy takes on various different forms but the basic contention is to see what unit volume of fuel is required to travel a certain distance (GFEI, 2013). There is however no touchstone fuel economy standard in use around the world and the large automobile markets each have their internal standards (An et al., 2011, p.4). Current fuel economy measurement systems rely on localised standard drive cycles that differ from each other in design leading to a lack of consensus. In addition, the various drive cycles in use around the world have fundamental validity concerns that further diminish their credibility. This paper will look into early attempts to create a standardised drive cycle for fuel economy measurement that relies on operating characteristics from automobiles on the road. This approach stands in contrast to the rolling road or laboratory testing approaches used by various drive cycles. 2 Currently Implemented Drive Cycles Various regions around the world have their own drive cycles in use for fuel economy testing. The differing drive cycles can be listed as shown in the table below: Table 1 - Fuel economy and GHG emission standards for vehicles around the world sourced from (An et al., 2011, p.4) Region Type Measure Structure Test Method United States Fuel mpg Footprint-based value curve US CAFE California GHG g/mile Car/LDT1 US CAFE European Union CO2 g/km Weight-based limit value curve EU NEDC Japan Fuel km/L Weight-bin based Japan 10-15 JC08 China Fuel L/100-km Weight-bin based EU NEDC Canada Fuel L/100-km Cars and light trucks US CAFE Australia Fuel L/100-km Overall light-duty fleet EU NEDC South Korea Fuel km/L Engine Size US CAFE The table above indicates that most standard drive cycles in use arrive from American, Japanese or European standard drive cycles. Local regulations dictate how standard driving cycles are formulated (Pundir, 2008, p.13) but it must be kept in mind that fuel economy tends to vary widely depending on the operating conditions which in turn requires replicable test procedures (Faiz et al., 1996). It is notable that most standard drive cycles tend to represent driving conditions in urban environments, on highways or through a combination of both. It is typical to see driving cycles varying between each other based on the tested parameters. Differing legislation and legal requirements tend to ...Show more


Standard Drive Cycle recreation from general driving behaviour Mostafa [ last name ]1, [ any other author]2 1Institute of ABC, University of [university name ] 2 Institute of XYZ, University of [university name ] Abstract. In many parts of the world car manufacturers are required by law to state the fuel economy performance of their vehicles when undertaking one or more Standard Drive Cycles such as the Urban and Extra Urban test cycle definitions required in Western Europe…
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