WLTP-SG-EV-04-10_addition

Report
NTSEL
National Traffic Safety and Environment Laboratory
JAPAN
OIL#58: Shorten test procedure
(validation test in phase 1a)
Trial Tests with Multi Cycle Test Method
• Test vehicle: Leaf (Nissan)
• Test plan
(1)SCT (Single cycle test)
To conduct the range test for each phase.
(2)MCT (Multi cycle test)
To consider MCT of WLTP based on
SAE.
(3) Compare SCT and MCT
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Proposed shorten test procedure with MCT based on SAE J1634
Shorten test procedure for W LTC (
M C T)
160
W LTC v5
140
S peed (km / h)
120
M iddle
4.76km
433s
100
Low
3.09km
589s
80
60
High
7.16km
455s
40
1)
To prevent uneven condition, num ber of Low / M iddle
should be several tim es.
2)
B efore C SC m and after C SC m should be sam e.
Ex-High
8.25km
323s
20
0
0
200
Low 1
400
600
M iddle 1
800
Tim e (s)
1000
1200
1400
H igh1
(3 .0 9 km ) (4 .7 6 km ) (7 .1 6 km )
9 m in 4 9 s
7 m in 1 3 s 7 m in 3 5 s
1600
1800
Ex- H igh1
M iddle 2
(8 .2 5 km )
5 m in 2 3 s
(4 .7 6 km ) (3 .0 9 km )
7 m in 1 3 s
9 m in 4 9 s
Low 3
M iddle 3
Low 2
H igh2
(3 .0 9 km ) (4 .7 6 km ) (7 .1 6 km )
9 m in 4 9 s
7 m in 1 3 s 7 m in 3 5 s
C SC M
5 5 m ph
(8 9 km / h)
Ex- H igh2
M iddle 4
(8 .2 5 km )
5 m in 2 3 s
(4 .7 6 km ) (3 .0 9 km )
7 m in 1 3 s
9 m in 4 9 s
The distance exclude C SC m
Each
phase
Low
M iddle
1 2 .3 6
1 9 .0 4
2356
1732
Low +M iddle
3 1 .4 0
H igh
Ex- H igh
1 4 .3 2
1 6 .5
910
646
H igh+Ex- H igh
3 0 .8 2
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Total
6 2 .2 2
5644
km
km
sec
Low 4
C SC E
5 5 m ph
(8 9 km / h)
Test vehicle
Vehicle condition:
2011 Model(ZAA-ZE0)
Odometer : 4868 km (before the test)
Condition
4WD Chassis dynamometer
FF 2WD mode
Setting weight (for WLTP gtr condition)
1681kg
Ambient temperature deg.C
25
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
4
Measured Ranges with SCT
This SCT test were conducted in the comparison with MCT and
only Middle and Ex-High phases were conditioned in this test.
Test Results with SCT
UBE
Eac
Usable Battery Capacity
AC Recharge Energy
177.1 km
18.7 kWh
23.6 kWh
Middle
170.1 km
19.7 kWh
24.3 kWh
High
147.3 km
20.2 kWh
24.8 kWh
Ex-High
98.5 km
19.5 kWh
24.3 kWh
Phase
Range
Low
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Example: Measured Discharge Energy with SCT(Middle)
800
Discharge Energy Edc Wh
700
600
500
400
300
200
100
0
0
5
10
15
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
20
Cycles
25
30
35
40
Measured Energy Consumption with MCT
Phase
Distance km
Low1
Middle1
High1
Ex-High1
Middle2
Low2
CSCM
Low3
Middle3
High2
Ex-High2
Middle4
Low4
CSCE
Usable Discharge Energy
3.10
4.75
7.12
8.25
4.75
3.10
50.25
3.09
4.74
7.11
8.24
4.75
3.08
24.26
Edc Wh
ECdc Wh/km
Discharge Energy
Energy Consumption
377
632
986
1652
542
335
7537
335
552
970
1651
539
336
3495
19.9 kWh
121.6
133.2
138.4
200.3
114.0
108.2
150.0
108.6
116.5
136.4
200.3
113.6
109.1
144.1
Usable Discharge Energy is the summation of Edc.
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
SOC variation
100%
160
START SOC
90%
END SOC
140
80%
120
100
SOC
60%
50%
80
40%
60
30%
40
20%
20
10%
0%
0
phase
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
drive length km
70%
Calculation equations for ranges with MCT
The range with MCT was estimated by the following equations.
Energy Consumption Wh/km = k1×EC1+ k2×EC2 + k3×EC3+ k4×EC4
Range km = (Usable Discharge Energy Wh) / (Energy Consumption Wh/km)
k1=(Discharge Energy for the first Cycle Wh) / (Usable Discharge Energy Wh)
k2= k3= k4 =(1- k1)/3
For middle range;
Energy Consumption Wh/km = k1×ECmiddle1+ k2×ECmiddle2 +
k3×ECmiddle3+ k4×ECmiddle4
= 115.3 Wh/km
Where,
k1 = 632 Wh / 19.9 kWh = 0.03
k2 = k3 = k4 = (1- k1)/3 = 0.32
Range km =19.9 kWh/ 115.3 Wh/km = 172.9 km
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Estimated Range with MCT
Phase
Measured Range
(SCT)
Estimated Range
(MCT)
Comparison
SCT vs MCT
Low
177.1km
183.2km
6.1km
3.6%
Middle
170.1km
172.9km
2.8km
1.7%
High
147.3km
146.1km
1.2km
0.8%
Ex-High
98.5km
99.5km
1.0km
1.1%
The results show that the error was small. Thus, it is considered that the shorten
test procedure with MCT is usable.
Time reduction effect with the shorten test procedure with MCT
The measurement of four ranges with SCT consumed 22:00.
The measurement of four ranges with MCT consumed 3:30.
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Effect in duration reduction for tests
Ranges
Single Cycle Test
3days
Day1 for charge
Day2 for WLTP SCT
Day3 for re-charge
WLTC range and
5ays
WLTC city range
Day1 for charge
Day2 for WLTP SCT
Day3 for charge
Day4 for WLTP city SCT
Day5 for re-charge
WLTC range,
11days
Low phase range,
Day1 for charge
Middle phase range,
Day2 for WLTP SCT
High phase range and Day3 for charge
Extra High phase range Day4 for Low phase SCT
Day5 for charge
Day6 for Middle phase SCT
Day7 for charge
Day8 for High phase SCT
Day9 for charge
Day10 for extra High phase SCT
Day11 for re-charge
WLTC range only
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Shorten test procedure
3days
Day1 for charge
Day2 for WLTP SCT
Day3 for re-charge
3days
Day1 for charge
Day2 for WLTP SCT
Calculation is applied for WLTP
city range
Day3 for re-charge
3days
Day1 for charge
Day2 for WLTP SCT
Calculation is applied for other
ranges
Day3 for re-charge
Concerns
 Fluctuation:
Influencing factors on range measurement
method
Measurement
Single Cycle Test
Shorten test procedure
Range [km]
UBE [Wh]
Constant speed
NA
Affected
DC electricity consumption
[Wh/km]
NA
Cycle sequence
Order of phases
NA
NA
Affected
Cycle configuration
Length of CSC
NA
NA
Affected
Speed pattern tracing
Strongly affected NA
Especially for the
final cycle
Affected
 Robustness:
Can the both test procedures produce good agreements on results with other
PEVs?
⇒Demand for validation tests
NTSEL National Traffic Safety and Environment Laboratory、JAPAN
Fluctuation in single cycle test
•The variation of range is sensitive to driving situations in high speed parts of the cycle.
•If the test vehicle is driven successfully during high speed tracing, the range will be
long. If it is not, the range will be short.
 Comparison of current and speed at 10th cycle
current
current
100
100
100
50
80
50
80
0
60
0
60
-50
40
-50
40
-100
20
-100
20
current A
-150
0
500
1000
0
1500
time s
120
vehicle speed
-150
0
500
1000
vehicle speed km/h
100
vehicle speed
current A
150
vehicle speed km/h
120
150
0
1500
time s
No power down
Tracing in 11th cycle was available
Power down at this timing
Tracing in 11th cycle was not available
Measured range was 157.1 km
Measured range was 149.2 km
NTSEL National Traffic Safety and Environment Laboratory、JAPAN

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