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WLTPOpen Issue Phase 1B
Issue: Handling of Manual Mode with AutomaticTransmission
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ACEA Informal Document 13.03.2014
WLTP-06-17e
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Current Text of WLTP gtr:
1.2.6.5.3.2.In the case of CO2/fuel consumption testing, the vehicleshall be tested in the predominant mode.
If the vehicle has no predominant mode, the vehicle shall be tested in thebest case mode and worst case mode, and the CO2 and fuel consumptionresults shall be the average of both modes.
Vehicles with an automatic transmission with a manual mode shall betested according paragraph 1.2.6.5.2. of this Annex.
1.2.6.5.2.Automatic shift transmission (Failure??)
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Proposal:
1.2.6.5.3.2.In the case of CO2/fuel consumption testing, the vehicleshall be tested in the predominant mode.
If the vehicle has no predominant mode, the vehicle shall be tested in thebest case mode and worst case mode, and the CO2 and fuel consumptionresults shall be the average of both modes.
If vehicles with an automatic transmission with a manual mode areselected to be tested in this mode according to this paragraph, theyshall be tested according paragraph 1.2.6.5.1. of this Annex.
Rationale:
Manual mode is merely another mode of an automatic transmission (and emissionslimits have to be complied with in all normal driving modes). If this mode is eitherpredominant or best or worst case as applicable, the shifting should follow the gearshift prescriptions for manual transmissions.
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