Is the HUMVEE Powered Sufficiently? Operation Charge 10/5/06.
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Is the HUMVEE Is the HUMVEE Powered Powered Sufficiently? Sufficiently? Operation Charge Operation Charge 10/5/06 10/5/06
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Transcript of Is the HUMVEE Powered Sufficiently? Operation Charge 10/5/06.
Is the HUMVEE Is the HUMVEE Powered Sufficiently?Powered Sufficiently?
Operation Charge Operation Charge
10/5/0610/5/06
PurposePurpose
To model power usage of the To model power usage of the HUMVEE.HUMVEE.
To identify power losses.To identify power losses. To propose alterations to meet final To propose alterations to meet final
goals.goals.
Gear RadioGear Radio
Three different gear ratios were Three different gear ratios were chosen for comparisonchosen for comparison• 19:119:1• 15:115:1• 10:110:1
This gear ratio includes the gear This gear ratio includes the gear reducer, gear differential, and portal reducer, gear differential, and portal axelaxel
Possible SpeedsPossible SpeedsHUMVEE MPH
0
20
40
60
80
100
120
0 2000 4000 6000 8000 10000 12000
AC Propulsion RPM
HU
MV
EE
MP
H
HUMVEE MPH 19:1
HUMVEE MPH 15:1
HUMVEE MPH 10:1
Developing Power ModelDeveloping Power Model
Power=Vi[Cr*Mg*cos(Θ)+Mg*sin(Θ)+.5*ρair*Cd*Af*Vi2]
Vi=Velocity
Cf=Rolling Resistance=.01
Cd=Coeff of drag=.446
ρair=1.2kg/m^3
Required Power to Move HUMVEERequired Power to Move HUMVEEPower for 0 slope
0
20
40
60
80
100
120
0 20 40 60 80 100 120
HUMVEE MPH
Po
wer
(K
W)
Pow er KW Required 19:1
Pow er KW Required 15:1
Pow er KW Required 10:1
Torque RequirementsTorque Requirements
Required Torque Curve 0% Grade
0
500
1000
1500
2000
2500
3000
3500
0 10 20 30 40 50 60 70 80 90 100
HUMVEE MPH
To
rqu
e (N
m)
Tire Torque 19:1 (Nm)
Tire Torque 15:1 (Nm)
Tire Torque 10:1 (Nm)
Torque Nm Reguired 19:1
Torque Nm Reguired 15:1
Torque Nm Reguired 10:1
Power Required to move HUMVEE Power Required to move HUMVEE in with efficiencies. (0% Upgrade)in with efficiencies. (0% Upgrade)
Torque RequirementsTorque RequirementsRequired Torque Curve 6% Grade
0
500
1000
1500
2000
2500
3000
3500
0 10 20 30 40 50 60 70 80 90 100
HUMVEE MPH
To
rqu
e (N
m)
Tire Torque 19:1 (Nm)
Tire Torque 15:1 (Nm)
Tire Torque 10:1 (Nm)
Torque Nm Reguired 19:1
Torque Nm Reguired 15:1
Torque Nm Reguired 10:1
Power Required to move HUMVEE Power Required to move HUMVEE in with efficiencies. (6% Upgrade)in with efficiencies. (6% Upgrade)
Torque RequirementsTorque RequirementsRequired Torque Curve 10% Grade
0
500
1000
1500
2000
2500
3000
3500
0 10 20 30 40 50 60 70 80 90 100
HUMVEE MPH
To
rqu
e (N
m)
Tire Torque 19:1 (Nm)
Tire Torque 15:1 (Nm)
Tire Torque 10:1 (Nm)
Torque Nm Reguired 19:1
Torque Nm Reguired 15:1
Torque Nm Reguired 10:1
Torque RequirementsTorque RequirementsRequired Torque Curve 15% Grade
0
500
1000
1500
2000
2500
3000
3500
0 10 20 30 40 50 60 70 80 90 100
HUMVEE MPH
To
rqu
e (N
m)
Tire Torque 19:1 (Nm)
Tire Torque 15:1 (Nm)
Tire Torque 10:1 (Nm)
Torque Nm Reguired 19:1
Torque Nm Reguired 15:1
Torque Nm Reguired 10:1
Power Required to move HUMVEE Power Required to move HUMVEE in with efficiencies.(15% Upgrade)in with efficiencies.(15% Upgrade)
Torque RequirementsTorque RequirementsRequired Torque Curve 11.5% Grade
0
500
1000
1500
2000
2500
3000
3500
0 10 20 30 40 50 60 70 80 90 100
HUMVEE MPH
To
rqu
e (N
m)
Tire Torque 19:1 (Nm)
Tire Torque 15:1 (Nm)
Tire Torque 10:1 (Nm)
Torque Nm Reguired 19:1
Torque Nm Reguired 15:1
Torque Nm Reguired 10:1
