Week-4 Challenge WOT Condition Part-2

ANS.1 :- What is the difference between mapped and dynamic model of engine, motor and generator? How can you change model type?

Open the hybrid matlab powertrain file as seen below :-

Open Passenger Car block. Sub blocks seen below :

Open Generator block and sub blocks as seen below :

RESULTS ARE

WOT CONDITIONS ARE RESULTS ;-

ANS.2 :-

1. Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and wind velocity in the environment block. Comment on the results.

Factors affecting the fuel efficiency are listed below

1) Vehicle Speed

2) Battery Power

3) Fuel Flow

Simulink block to calculate miles per gallon.

• vehicle speed data is used to calculate the distance traveled in meters which is then converted to miles
• Battery power data is used to find power used in kWh which is then converted to gasoline-equivalent using US EPA value by dividing with 33.7
• note: As per the US environmental protection agency(EPA) 1 gallon of gasoline is equal to 33.7 kWh
• Dividing distance traveled in miles by the number of gallons, we can get miles per gallon.
• For HEV this gallon(gasoline-equivalent of battery power) is added with gallon used by IC engine then miles per gallon is calculated.
• WOT CONDITIONS ARE RESULTS ;-
• 

ANS.3:-

3.Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and wind velocity in the environment block. Comment on the results.

Open the HEV reference application.

Grade - 0, wind velocity 0m/s

Grade - 15, wind velocity 30m/s

RESULTS:

with the increase in grade and wind velocity,

• peak velocity achieved is reduced as gradient force and aerodynamic force becomes dominant.
• fuel economy is also reduced because the distance traveled is reduced due to external forces.
• deceleration time is reduced so batter recharging capacity is also reduced.
• Battery SOC at the end of WOT acceleration is similar but during deceleration battery is charged more is the grade and wind velocity is less.

• ANS 4.:-
• Keeping all other parameters same, compare the simulated results of hybrid and pure electric powertrains.

PURE EV.

Results:

1.EV model

2.HEV P2 Model