Week-4 Challenge WOT Condition Part-2

1. Difference between mapped and dynamic model of engine ,motor and generator

MAPPED MODEL	DYNAMIC MODEL
static , pre-defined value	dynamic, not a pre-defined value
Run-time of the model is faster than dynamic model	Run-time is slower than mapped model
Doesn't run real time parameter	runs in real time parameter
less accuracy	more accuracy

procedure to change model:
> select the vehicle type in powertrain blockset.

>Then simulink will open

>change the variable label mode choose mapped or dynamic.

2. from powertrain blockset

IN 1 AND 2 (VEHICLE SPEED AND FUEL FLOW)

SPEED =DISTANCE/TIME

TO know distance s*t here time is changing , so if we take integrate of speed with time

flow meter and output battery is multipled and the result will be in mass flow rate so that means kg/sec next it is integrated . after that 1/1000 is multiplated to convert the output in litres.

the two result is compared and the final output will be amount of litre for 100km run.

battery:

the battery power and 1000 kW are multiplied result in KWH

then it is multiplied with us equivalent result in KWH/gal and it is multiplied with 3600 and the output will be in m^3 per gal

which will be given as input to the flow meter.

CALCULATING MILES PER GALLON:

inverse laplance transform of vehicle speed (6.21371*10^-4), inverse laplance transform offlow meter (264.172 m^3) is intergrated .both are conbined and equivalent gallon is futher divided results in miles per gallon.

3.

.

WOT grade value HEV is 0 in default it changed to 8

PLOT 1:(velocity vs mph)

speed achieved 67mph not able to achieve 80 mph

acceleration time 44 sec

decleration time 5sec

PLOT 2:(ENGINE SPEED,motor speed,generator speed)

max engine speed:4676rpm

max motor speed:8100 rpm

max generator speed:12855 rpm

PLOT 3:(motor & engine& generator torque)

max torque of motor:206Nm,max engine torque:140Nm,max generator torque:48 Nm

PLOT 4:(battery)

Ipeak during charging=-151.5A

Ipeak during discharging=167.6A

PLOT 5:(soc)

decreased from 60 to 26% in timeperiod of 49.3sec

PLOT 6:(fuel economy)

max miles car can run per gallon =17.9 miles

CONCLUSION :
outcomes of 6 grade compared with 0

top speed cant able to achieve.

fuel economy is halfed.

soc discharge is high.

4,HEV and EV

parameter same for both hev and ev

HEV PLOT

EV PLOT:

comparation of plot:

PLOT	1	2	3	4	5	6
HEV	speed-80mph acceleration time-16.7 sec deceleration time-6.2 sec	motor speed-9497rpm	torque-138Tm	charging I- -150A discharging I-163A	soc-60-39% decreases	fuel economy-46miles
EV	speed-10.8mph acceleration time-50sec deceleration time- 9.8sec	motor speed-1123rpm	torque-260Tm	charging- -173A discharging-216A	soc=80 to 75% decreases	fuel economy-20miles

CONCLUSION:

efficiency of ev is higher than hev.(terms of fuel consumption)

top speed achieved is higher in hev compared to ev.

motor speed greater in hev rather than ev.

charging rate of the battery is higher than hev

ev produce zero emission