AUTONOMOUS WHEEL POWER MANGEMENT SYSTEMS

1

d i

xixxx FRFFF +==+ ∑ =

Σ

2

1 21

TRACTIVE RUNNING GEAR EFFICIENCY Computational Example

Step One:

221121

2

1 zzxx

i xi RfRfRRR +=+=∑

=

 Assign Drawbar Pull

 Calculate Rolling Resistance forces

 Calculate Total Circumferential Force

dF

xV

dF

2xR2xF1xR1xF

2

TRACTIVE RUNNING GEAR EFFICIENCY Computational Example

xV

dF

2xR2xF1xR1xF

Step Two:

Σ

= x

d f F

F η

 Calculate Rolling Resistance Efficiency

3

TRACTIVE RUNNING GEAR EFFICIENCY Computational Example

Step Three:

xV

dF

2xR2xF1xR1xF

 Split the total circumferential force

between the axles in proportion 100:0; 25:75; 50:50; 75:25; 0:100 and calculate the circumferential forces and slips of the front and rear wheels.

d i

xixxx FRFFF +==+ ∑ =

Σ

2

1 21

12 / xx FF

4

TRACTIVE RUNNING GEAR EFFICIENCY Computational Example

xV

dF

2xR2xF1xR1xF

∑ =

Σ

Σ

−+−+ = n

i iixiiixix

x

ssFssFF

F

1

"""''' ))1/()1/(( δδδδ δη

Step Four: δη

kNkNkNkNFd 20;15;10;5=

5

TRACTIVE RUNNING GEAR EFFICIENCY Computational Example

xV

dF

2xR2xF1xR1xF

δ δ ηηη fin

w

f in

w in

w

dt x P

PPP P P

= +−

== Σ

ΣΣΣ

Σ

)(

Step Five: