Week-4 Challenge WOT Condition Part-2
WOT Condition Part-2
Q1. What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?
Solution-
The Mapped Model
The simulation of the powertrain block set model consist of data that is prebuilt in the lookup table is dealing with mapped data
The mapped model calculation is very fast .
Mapped model are suitable for analysis and design activity that does not require engine subsystem dynamic characterstic.
The Dynamic Model
The simulation of the powertrain block set model consist of data by calculate every small individual like movement of vehicle ,drag ,speed ,velocity etc.
The Dynamic model calculation is take very long time taken.
Step Follow For change model type-
- Open Ev reference application using help section for example in pure electric
- When click on passegner car open as electric car using motor new referance appered
- click on right click option appered and select variant in label mode active choice.
- Ev mapped active
- Ev dynamic mode active.
Q2 . How does the model calculate miles per gallon? Which factors are considered to model fuel flow?
Solution-
- Open Ev refernce application under this visulization various type block for calculation.
- Open performance calculation block, which has vehicle speed and battery power as input.
- MPG is different from MPGe.It means miles per gallon equivalent.It is calculated in the model with the help of battery power and vehicle speed.
- vehicle speed is multiply and square root .The divide with time and convert m to mile.
- Then divided with gallon
- Battery power is divided with 1000 and divied with 33.7 . Then divide 33.7 then convert is s per hour and then convert to m^3 per gal.
Q.3 Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and wind velocity in the environment block. Comment on the results.
Solution-
- Open HEV multimode referance application
- It contain various subsystem like enviornment ,longitudianal driver,passenger car ,visulization etc.
- By default it is FTP75 drivecycle with 2474 second. Change with simulation 50s
- Go to environment block put the value grade angle is 8 and wind 35 respectively.
- Now, Run the application.
Q.4 Keeping all other parameters same, compare the simulated results of hybrid and pure electric powertrains.
Solution-
After Just runnig the application result are display.
Now compare both Ev and HEV referance application
1.Ev referance application
2. HEV referance application
- From both result curve the vehicle speed in HEV is higher than EV
- Battery current also high.