Challenge -1

1.For the already Build electric vehicle model in the tutorial section of the GT suite change the below given parameters as such,

1. Increase the Vehicle mass by 50%.
2. Increase the Drag coefficient by 5%.

Compare the results for the traction motor power without changing the drive cycle.

Ans : New vehicle mass is = 1500*1.5 = 2250

Drag coefficient = 0.28 *1.05 = 0.294

The drive cycle used here are FTP75 and Highway fuel economy test cycle

HFET FTP75

fuel economy 25.3 km/l 21.1 km/l

BSFC 285 g/kWh 309 g/kWh

Motor speed in HFET cycle

Motor speed FTP 75 cycle

Brake torque of HFET cycle

Brake torque of FTP 75 cycle

Brake Power of HFET cycle

Brake Power of FTP 75 cycle

It is seen that whenever there is negative sign there is generating mode of Motor .

SOC in HFET cycle

SOC in FTP 75 cycle

SOC values decrease from 65 percent to 35 percent whenever SOC decreases below 35 percent there is charging torque activated .

comparision of fuel economy and BSFC for FTP 75 and HFET cycle with and without increase in mass and aerodynamic drag

with increase in mass and aerodynamic drag without increase in mass and aerodynamic drag

FTP 75 cycle HFET cycle FTP 75 cycle HFET cycle

Fuel economy 25.3 km/L 21.1 km/L 35.2 km/L 28.5 km/L

BSFC 285 g/kWh 309 g/kWh 305.3 g/kWh 351.8 g/kWh