Week-4 Challenge WOT Condition Part-2
Que 1)- What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?
Answer-
Internal Combustion Mapped and Dynamic Engine Models
|
Type |
Implementation |
When to Use |
|
|---|---|---|---|
|
Mapped |
|
Model uses a set of steady-state lookup tables to characterize engine performance. The tables provide overall engine characteristics, including actual torque, fuel flow rate, BSFC, and engine-out exhaust emissions. |
|
|
Dynamic |
|
Model decomposes the engine behavior into engine characteristics that are separated into lower-level components. By combining components in this way, the models capture the dynamic effects. |
|
How can you change model type?
By customize a SI or CI reference application, you can use either a dynamic or mapped engine model. The table provides considerations for using either implementation.
Que 2)- How does the model calculate miles per gallon? Which factors are considered to model fuel flow?
Answer-
1. To get Velocity as +ve value we multiply 2 times and take square root of it, then by integrating this we get distance in meters.
2. this distance convert into m to km by conversion block shown in fig. and we set lower and upper limit for the distance in km.
3. Battery power is in watts so divide by 1000 to get kw power and some conversion to get m^3 per gallon after that by integrating get m^3 gallon to liter
4. Also a distance convert into meter to mile for us conversion system by gain block.
5. Now dividing distance in miles by fuel in gallon to get miles/gallon.
6. at the end by connecting and converting all value we get liter per 100 km also.
Que 3)- Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and wind velocity in the environment block. Comment on the results.
Answer- HEV Reference Application
To change WOT as drive cycle, in above fig. open drive cycle source block in that change the drive cycle source as WOT.
Now we have to change Grade and Wind velocity and analysis the results
Que 4)- Keeping all other parameters same, compare the simulated results of hybrid and pure electric powertrains.
Answer- EV Reference Application
To change WOT as drive cycle, in above fig. open drive cycle source block in that change the drive cycle source as WOT.
EV Model Result
