WLTC sur HY Premires Constatations

RLD test program : alternative methodO.I.L#1826th -28th of March 2014WLTP IWG #61

WLTP-06-30eRLD determination with Wind-tunnel + chassis dyno vs coast-down, to enable the introduction of the WT+CD method in GTR 15, Annex 4, 6. [RESERVED: Road load measurement using a combination of a wind tunnel and chassis dynamometer]Comparison of equivalency of both methodsComparison of reproducibility/repeatability for both methods

Comparison of the running resistance measured on chassis dyno with the ISO 10521-1 method (stabilized speeds) and by deceleration (shorten method)Aim = optimization of the current ISO method

WLTP IWG #62Objectives

5 vehicles provided by PSA and RenaultM1 & N12x4 & 4x4Automatic & manual Transmission

3 Tracks : Idiada (ES) ; Belchamp (FR) ; Aubevoye (FR)

2 Chassis dynamometers : Belchamp (FR) ; Aubevoye (FR)

1 Wind tunnel : St Cyr (FR S2A)

1 golden Engineer = UTAC

WLTP IWG #63Outlines of the program (1/2)

Tests period targeted : June September 20141) Tracks and chassis dyno2) Wind Tunnel

In parallel, adjustment of the used reference method and wind tunnel criteria in the framework of the ad hoc TFs lead by BMW (Christoph Lueginger) and TNO (Rob Cuelenaere) : O.I.L #10 and 18Preliminary exchanges with ACEA, VW, BMW in MarchWLTP IWG #64Outlines of the program (2/2)

Thank you for your attention !5