Week-4 Challenge WOT Condition Part-2
- How does the model calculate miles per gallon? Which factors are considered to model fuel flow?
As this is a ev reference model we are not actually calculating how much fuel is required to move per mile
but we are trying to take the value energy or power which is required for the vehicle to move to a certain distance
a)from the visualization table we can clearly see that vehicle speed ,distance and battery are considered into calulating the
fuel required or distance calulated per mile following are given the calulations for metric conversions.
We know that gallon is not stanadard metric unit we will need to convert liters to gallon
the conversion is as follows
1000litre is 264.4 gallons
Following are the factors which are required to model fuel flow
.)fuel economy
.)weight of the vehicle and passenger
.)areodynamic drag
.)resistances such as rolling resistance etc.
.)weather conditons etc
- What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?
1)This type of model uses lookup table to obatin battery current and motor characteristics
2)this type of system has low accuracy
3)reason behind low acccuracy is that ,this system does uses stored values
4)and with real time inputs we can get good accuracy and not with stored accuracy
5)as real time data is not used the no of inputs and outputs are less due to which it does not take much time for
simulation which is not the case in dynamic outputs.
following are few subsystems which are used in a dynamic model.
1)Dynamic model unlike mapped does not use lookup tables as input
2)in this dynamic model it is combination of various subsystems for input and output
3)due to which we have more accurate values therefore the accuracy of dynamic model is more than of mapped model
4)the simulation time is more than that of mapped model
following are methods to chnage model type
1)in powertrain blockset block change type of vehicle
2)click on the blockset and select the type of model you need dynamic or mapped model
Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and wind velocity in the environment block. Comment on the results
