IFM, Institute for Vehicle Technology and Mobility 1 Mobilität Transmitted by the expert from Germany The French/German ASEP proposal 05.09.2006 Informal.

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Presentation transcript:

IFM, Institute for Vehicle Technology and Mobility 1 Mobilität Transmitted by the expert from Germany The French/German ASEP proposal Informal document No. GRB-44-4 (44th GRB, 4-6 September 2006 agenda item )

IFM, Institute for Vehicle Technology and Mobility 2 Mobilität L_tyre = L_tyre_ref + a * log(v/v 0 )  L_tyre_ref = L_tyre(v 0 )  v 0 = 50 km/h L_prop = L_prop_ref + b * (n – n 0 )  L_prop_ref = L_prop(n 0 )  n 0 is determined by engine speed in gear i of Annex 3 at 50 km/h  L_prop_ref is determined by L_wot of annex 3 in gear i  b = 6/1000, if n > n 0  b = 3/1000, if n < n 0 Lprop_ref is calculated using the following equation:  Lprop_ref = 10*log(10^(0.1*L_wot_i) – 10^(0.1*Lroll_50)) L_ASEP_F (v, n) = 10 * log(10 (0.1 * (L_prop_ref + b * (n – n 0 )) + 10 ^(0.1 * L_tyre_ref + a * log(v/v 0 )) ) + 2 dB(A) It is an open question whether n and v should be related to the microphone plane PP’, to Lmax or to the end of the test track BB’. The Noise model

IFM, Institute for Vehicle Technology and Mobility 3 Mobilität Test track

IFM, Institute for Vehicle Technology and Mobility 4 Mobilität Results for vehicles with manual transmission

IFM, Institute for Vehicle Technology and Mobility 5 Mobilität Propulsion noise limit curve

IFM, Institute for Vehicle Technology and Mobility 6 Mobilität Example

IFM, Institute for Vehicle Technology and Mobility 7 Mobilität Vehicle speeds between 20 km/h (v_AA’) and 70 km/h (v_BB’) Engine speeds at BB’ up to 2,6*pmr -0,29 * (s – n_idle) + n_idle, but not more than 0,9* (s – n_idle) + n_idle with s – rated engine speed in min-1, n_idle – idling speed in min-1 pmr = Pn in kW/(m0 in kg +75)*1000 pmr is the power to mass ratio index. This is the rated power of the vehicle (Pn) in kW di-vided by the kerb mass of the vehicle (m0) in kg + 75 (to account for the mass of the driver) and multiplied by Test area limitations

IFM, Institute for Vehicle Technology and Mobility 8 Mobilität Engine speed limitation

IFM, Institute for Vehicle Technology and Mobility 9 Mobilität GRB 0906 Thank you for your patience