1. OIL#23 Requirements for 4WD dynamometers WLTP-08-05e by Japan

2. Proposed changes 2 Annex5 2.3.1.2. Upon initial installation and after major maintenance, the one of the following paragraph (2.3.1.2.1 or 2.3.1.2.2) and paragraph 2.3.1.2.3. shall be satisfied. The speed difference between front and rear rolls is assessed by applying a 1s moving average filter to roll speed data acquired at a minimum of 20 Hz 2.3.1.2.1The difference in distance covered by the front and rear rolls shall be less than 0.1 m in any 200 ms time period. If it can be demonstrated that this criteria is met, the speed synchronization requirement in paragraph. 2.3.1.3. below is not required. This must be checked for new dynamometer instalments and after major repairs or maintenance. 2.3.1.2.2.The speed difference of all roll speeds shall be synchronous to within +/- 0.16 km/h. This may be assessed by applying a 1s moving average filter to roll speed data acquired at a minimum of 20 Hz. This must be checked for new dynamometer instalments and after major repairs or maintenance. 2.3.1.2.3. The difference in distance covered by the front and rear rolls shall be less than 0.2 per cent of the driven distance over the WLTC. The absolute number shall be integrated for the calculation of the total difference in distance over the WLTC. Justification : To make the requirement of 4WD chassis dynamometers more clear and simplified. (please take a look at the slide 3&4 for more detail)

3. 3 Initial speed process Time [sec]0.000.050.100.150.200.250.300.350.400.450.500.550.600.650.700.750.800.850.900.951.001.051.101.151.20 Front roller speed [km/h]F01F02F03F04F05F06F07F08F09F10F11F12F13F14F15F16F17F18F19F20F21F22F23F24F25 Rear roller speed [km/h]R01R02R03R04R05R06R07R08R09R10R11R12R13R14R15R16R17R18R19R20R21R22R23R24R25 1. Defferece speed(Fxx-Rxx) [km/h]V01V02V03V04V05V06V07V08V09V10V11V12V13V14V15V16V17V18V19V20V21V22V23V24V25 2. Take moving average at each 20Hz sampling F01Average (V01-V20) F02Average (V02-V21) F03Average (V03-V22) F04Average (V04-V23) F05Average (V05-V24) F06Average (V06-V25)

4. 4 Annex 5 4WD Requirements Time [sec]0.000.050.100.150.200.250.300.350.400.450.500.550.600.650.700.750.800.850.900.951.001.051.10... Tn Filtered difference speed F01F02F03F04F05F06F07F08F09F10F11F12F13F14F15F16F17F18F19F20F21F22F23...Fn 2.3.1.2.1. D01 Summate (F01 to F04), multiply 0.05 and divide by 3.6 then transform to absolute value D02 Summate (F02 to F05) ・・ ・ D03 Summate (F03 to F06), ・ ・・ D04 Summate (F04 to F07) ・・ ・ Dn Summate (Fn to Fn+3), ・ ・・ 2.3.1.2.2. 2.3.1.2.3.