Environmental Engineering Reference
In-Depth Information
V, P(V)
IMC
M/G
EMC
I
d
U
d
ESS
Figure 11.10 Driveline system of a vehicle (IMC, inverter-motor controller;
EMC, energy management controller; ESS, energy storage system
and M/G, motor-generator
Q3:
Repeat Q2 for the following conditions:
þ
1.2% grade all else being the same.
A3:
P
ð
V
Þ¼
12
:
086 kW
Q4:
Repeat Q3 for the following conditions: 5 mph headwind all else being the
same.
A4:
P
ð
V
Þ¼
13
:
65 kW
Q5:
Repeat Q4 for the same conditions with the exception that the grade is now
1.2% (this is why the coast down procedure needs to run in both
directions).
A5:
P
ð
V
Þ¼
6
:
068 kW
Q6:
Repeat Q5 for the same conditions but change the headwind to tailwind of
5 mph.
A6:
P
ð
V
Þ¼
3
:
18 kW
Q7:
Repeat Q1 for the case of 0.15
g
acceleration from 25 mph cruise speed. For
this case the 0.15
g
acceleration requires setting
V
dot
¼
1.47 m/s
2
, and all
other conditions are same.
A7:
P
ð
V
Þ¼
21
:
2kW
Q8:
Summarize the test cases in a table.
A8:
V
dot
(m/s
2
)
Exercise
V
(mph)
Grade (%)
Headwind,
V
(mph)
P
(
V
) (kW)
1
25
0
0
0
1.47
2
60
0
0
0
8.29
3
60
0
1.2
0
12.09
4
60
0
1.2
5
13.65
5
60
0
1.2
5
6.07
6
60
0
1.2
5
3.18
7
25
1.47
0
0
21.21
