Table of running resistances – PSA proposal

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Presentation transcript:

Table of running resistances – PSA proposal WLTP-DTP-LabProcICE-121 Table of running resistances – PSA proposal Bertrand MERCIER 12/03/2012

Using the table of running resistances

Proposed approach The coefficient b is comming from aerodynamics at 95 % (1/2 ρ SCx v²) Change b to aerodynamics 1,3 factor for N1 vehicles Regression

Evaluation of the position of N1 vehicles Evaluation of aerodynamics on several vehicles 3 types of N1 vehicules F1 (Berlingo/Partner) K1 (Jumpy/Expert) K2/K3 (Jumper/Boxer) For each type , 3 shapes : mini ; medium; maxi For each type and shape : The test mass , average of market distribution The Aerodynamics, average of market distribution

Evaluation of the position of N1 vehicles Positionning of the 9 « vehicles »

Proposition for a new coefficient b Creation of a new table of running resistances using the new coefficient b

Conclusion Proposal Issues Using of this new table Same table for M1 and N1 withdraw the 1,3 factor No change for the coefficient a Issues Opposite concavity Need some more datas for heavyer vehicles