1. WLTP – NEDC Correlation Exercise AVL Cruise Conventional Model Template Munich 25 July 2014

2. Conventional Model Template
The model structure is depicted on the right
Based on the “Man FWD” Cruise default model
“FSS Bogacki / Shapine+” is chosen as the simulation method
Additional features:
Start Stop
Thermal Model
GB Temperature Calculation
Electric System Calculation
Mechanical Consumers

3. Conventional Model Template

4. Application for Fiat 1.4 Fire Evo2 MT Euro6 Results Summary
NEDC Hot
NEDC Cold
WLTP Hot
WLTP Cold
ERMES NEDC
ERMES WLTP
Correlation
Velocity
99.9%
99.8%
99.5%
RPM
96.7%
96.9%
96.6%
94.8%
95.7%
95.8% FC
96.2%
95.5%
85.1%
93.4%
94.5%
Cum. FC
100%
Torque
90.1%
88.6%
68.9%
88.8%
91.2%
Temperature -
98.8%
Summary
On 5% Limit:
87.5%
90.6%
98.1%
99.1%
85.5%
Diff. on CFC
0.7%
-0.7%
0.3%
-0.3%
3.6%
-1.2%
NEDC Hot & NEDC Cold were used for the calibration of the model, while the other cycles were used for validation purposes
On the validation, no change was made to the model apart from the road loads, the cycle inertia weight and the initial temperature

5. Application for Fiat 1.4 Fire Evo2 MT Euro6 NEDC Cold Cycle – Cumulative FC
On 5% Limit: 90.6%
Correlation: 100%
Diff. on CFC: -0.7%
Velocity Corr.: 99.9%

6. Application for Fiat 1.4 Fire Evo2 MT Euro6 NEDC Cold Cycle – Engine Speed
Correlation: 96.9%

7. Application for Fiat 1.4 Fire Evo2 MT Euro6 NEDC Cold Cycle – Instantaneous FC
Correlation: 95.5%

8. Application for Fiat 1.4 Fire Evo2 MT Euro6 NEDC Cold Cycle – Temperature
Correlation: 98.8%

9. Application for Fiat 1.4 Fire Evo2 MT Euro6 NEDC Cold Cycle – Gearbox Temperature
Correlation: 99.6%

10. Discussion A template model is considered necessary in order to:
Allow a clear and coherent input data collection form for all OEMs,
Finalize the list of inputs which should be used for the SA,
Allow the finalization of the meta-models development, which should take into account all related sub-models
The template model should be applied to other vehicles and compared with the measurements, for further validation
JRC, along with LAT, should collaborate on the previous point
Additional components may be added (AT – controllers ??)