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Pierre Bonnel Martin Weiss Joint Research Centre (JRC) IES - Institute for Energy and Transport

Evaluating the drivability of the RDE-LDV cycles. Pierre Bonnel Martin Weiss Joint Research Centre (JRC) IES - Institute for Energy and Transport Ispra – Italy. Heinz Steven designed three RDE-LDV test cycles based on short trips contained in the WLTP database

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Pierre Bonnel Martin Weiss Joint Research Centre (JRC) IES - Institute for Energy and Transport

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  1. Evaluating the drivability of the RDE-LDV cycles Pierre Bonnel Martin Weiss Joint Research Centre (JRC) IES - Institute for Energy and Transport Ispra – Italy

  2. Heinz Steven designed three RDE-LDV test cycles based on short trips contained in the WLTP database Each cycle consists of 3 phases of 300 s each (low, medium, high speed) The three cycles display low, medium, and high severity, based on the 5-, 50-, and 95-percentile of acceleration parameters of short trips The three RDE-LDV test cycles were distributed for vehicle testing in July 2011 Background

  3. Vehicle: Euro 6 diesel (4 cylinder, 1968 ccm; 105 kW, 155 g CO2/km; SCRand automatic transmission Pre-test of each cycle by the lab personal for assessing drivability One professional driver drove all cycles One test drive prior to emissions testing; three repetitions of each cycle Cycle testing

  4. Overview deviations • Complete RDE-LDV cycles: Deviation driven vs. scheduled speed • Three repetitions; 2 km/h interval for NEDC (and WLTC) testing

  5. Overview deviations • Complete RDE-LDV cycles: Deviation driven vs. scheduled speed

  6. Overview deviations • Complete RDE-LDV cycles: Deviation driven vs. scheduled speed • Error margins decreased with increasing driver’s experience • Severity increases error margins • Error margins generally below the 2 km/h threshold

  7. Overview deviations • Speed phases of RDE-LDV cycles: Deviation driven vs. scheduled speed

  8. Overview deviations of • Speed phases of RDE-LDV cycles: Deviation driven vs. scheduled speed • Low-speed and high-speed phases shows largest deviations • Severity increases error margins • Error margins generally below the 2 km/h threshold

  9. Overview critical points • RDE-LDV cycles: Critical points

  10. Overview critical points • RDE-LDV cycles: Critical points • Rapid changes in acceleration/deceleration at low speeds in 1st gear for vehicles equipped with manual gear shift

  11. Overview critical points • RDE-LDV cycles: Critical points • Rapid changes in acceleration/deceleration at very low speeds for vehicles equipped with manual gear shift • High acceleration events of the severe cycle

  12. Thank you! Joint Research Centre (JRC) IES - Institute for Energy and Transport Ispra – Italy Pierre Bonnel (pierre.bonnel@jrc.ec.europa.eu) Martin Weiss (martin.weiss@jrc.ec.europa.eu)

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