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Representative Testing of Emissions and Fuel Consumption of Working Machines in Reality and Simulation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 24, 2012 by SAE International in United States
Annotation ability available
Out of necessity, emission and fuel consumption test cycles are a simplified representation of the real-life use of a vehicle or component that is assumed to be most common. In reality, variations are introduced by both the driver and the environment - and to a lesser degree also by the vehicle itself through performance deviations because of tolerances in the components' characteristics. However, since such simplified test cycles exist and are accepted (or even required by law), OEMs tend to use them also in product development to benchmark their products against the competition, and to make decisions on how to optimize design.
While this approach might give acceptable results for on-road vehicles, it fails to capture reality in the case of versatile working machines. Here, the variety of possible applications cannot be covered by one common application but rather demands a mix of several cycles. This has a large impact on the setup and evaluation of physical and virtual testing of working machines, especially those with alternative power systems like hybrids, which will be discussed in the paper.
Attempts to simplify the complexity of real-life applications are made in some testing standards and standard proposals, but they over-simplify with the result of prescribing a common cycle that is not representative and which therefore, however tempting, cannot be used for any meaningful benchmarking of emissions and fuel consumption.
CitationFilla, R., "Representative Testing of Emissions and Fuel Consumption of Working Machines in Reality and Simulation," SAE Technical Paper 2012-01-1946, 2012, https://doi.org/10.4271/2012-01-1946.
- DieselNet “Emission Test Cycles: ECE 15+ EUDC / NEDC,” http://dieselnet.com/standards/cycles/ece_eudc.php April 2012
- DieselNet “Emission Test Cycles: FTP-75,” http://www.dieselnet.com/standards/cycles/ftp75.php April 2012
- DieselNet “Emission Test Cycles: Nonroad Transient Cycle (NRTC),” http://dieselnet.com/standards/cycles/nrtc.php April 2012
- DieselNet “Emission Test Cycles: ISO 8178,” http://dieselnet.com/standards/cycles/iso8178.php April 2012
- Frank, B. Skogh, L. Alaküla, M. “On wheel loader fuel efficiency difference due to operator behaviour distribution,” CVT 2012 Germany March 14 15 2012
- Frank, B. Skogh, L. Filla, R. Fröberg, A. Alaküla, M. “On Increasing Fuel Efficiency by Operator Assistant Systems in a Wheel Loader,” VTI 2012 China July 16 19 2012
- Filla, R. “Quantifying Operability of Working Machines,” Ph.D. thesis Department of Management and Engineering, Linköping University Linköping 2011
- JTI “Engine load pattern and engine exhaust gas emissions from off-road vehicles and methods to reduce fuel-consumption and engine exhaust gas emissions / Jordbruks- och anläggningsmaskiners motorbelastning och avgasemissioner - samt metoder att minska bränsleförbrukning,” JTI report no. 308 1401-4963 http://www.jti.se/index.php?page=publications 2002
- JTI “Development of relevant work cycles, emission factors and reduction of fuel consumption for working machines / Utveckling av relevanta arbetscykler och emissionsfaktorer samt reducering av bränsleförbrukning för arbetsmaskiner (EMMA),” JTI report no. 309 1401-4963 http://www.jti.se/index.php?page=publications 2002
- Filla, R “Hybrid Power Systems for Construction Machinery: Aspects of System Design and Operability of Wheel Loaders,” ASME Technical Paper IMECE2009-10458 2009 10.1115/IMECE2009-10458
- Wikipedia “New European Driving Cycle - Criticism,” http://en.wikipedia.org/wiki/New_European_Driving_Cycle April 2012
- Japan Construction Mechanization Association “Earth-moving machinery - Test methods for energy consumption - Hydraulic excavators,” JCMAS Standard H 020 Sep. 2010
- Japan Construction Mechanization Association “Earth-moving machinery - Test methods for energy consumption - Wheeled loaders,” JCMAS Standard H 022 Sep. 2010
- AVL “Methods to calculate and declare fuel consumption for heavy non road mobile machinery, part II,” The Swedish Transport Administration 2011
- EPA “Fuel Economy - Regulations and Standards,” http://www.epa.gov/fueleconomy/regulations.htm April 2012
- DieselNet “Emission Standards - United States, Cars: Fuel Economy,” http://dieselnet.com/standards/us/fe.php April 2012
- DieselNet “Emission Standards - European Union, Cars: Greenhouse Gas Emissions,” http://dieselnet.com/standards/eu/ghg.php April 2012
- Volvo CE “How much does your equipment really cost?” http://www.volvoce.com/constructionequipment/na/en-us/newsmedia/resourcedownloads/Pages/costofownership-calculator.aspx June 2012
- Filla, R. “Simulating Operability of Wheel Loaders - Operator Models and Quantification of Control Effort,” CVT 2012 Germany March 14 15 2012