Week-4 Challenge WOT Condition Part-2
1. What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?
Mapped models:
Mapped models are used when the behavior of a particular models that is not of our interest and can be modeled with predefined values from look up tables.
Mapped model example:
Dynamic models:
Dynamic models is used when the internal response of a model with respect to the components is needed.
Dynamic models example:
2. How does the model calculate miles per gallon? Which factors are considered to model fuel flow?
Vehicle sped data is used to calculate the distance traveled in `m/s` which is then converted to `Mph`. The battery data is used to find power in `KWh` which is then converted to gasoline using US EPA valuse by dividing it with 33.7. From dividing the distance travelled in `Mph` by tge number of GAL we can get `Mpg` (Miles per Gallon).
3. Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and wind velocity in the environment block. Comment on the results.
HEV referrance application:
Default WOT check
Environment:
Visualization:
Changing the Gradeability, Wind and velocity:
Result:
- When the grade and wind velocit is changed the peak velocity reduces.
- When the engine speed increases SOC decreases.
- When engine speed decreases SOC increases
- When Torque load is decreased, fuel economy is increased.
4. Keeping all other parameters same, compare the simulated results of hybrid and pure electric powertrains.
EV Powertrain:
EV Reference Application:
WOT Condition:
Environment Condition:
Output:
HEV powertrain:
HEV referrance application:
WOT Condition:
Environment Condition:
Results:
Conclusion:
- Both EV and HEV is compared against each other with same parameters and conditions.
- The time taken to achieve the peak velocity is less for HEV when compared with pure EV.
- The fuel economy for HEV is very less when compared with EV because of more number of moving parts and multiple source of work.