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H.S.H.S.
1
Comparison of the worldwide weighted WLTP database and EU regional database with WLTC
rev3 and further modifications performed by JARI, JRC and HS
Heinz Steven
22.11.2011
WLTP
H.S.H.S.Assessment criteria
2
• The assessment is based on comparisons between the databases and the cycles per vehicle speed class.
• The comparison includes the following parameter: Average values of a_pos, v*a_pos, RPA Distributions of v, Distributions of a and v*a for positive accelerations, Sum of least squares, Estimates for hot CO2 emissions.
H.S.H.S.Average values
3
• Figure 1 shows a comparison of average a_pos values.• Figure 2 shows a comparison of average v*a_pos values.• Figure 3 shows a comparison of RPA values.• WLTC rev2 means the cycle version tested within validation
step 1.• WLTC rev3 111108 means the cycle version as presented by
Japan during the DHC web conference at 07.11.2011.• WLTC v3 HS_JP_HS4 means the result of several iterative
modification steps performed by JARI, JRC and HS.
H.S.H.S.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0 10 20 30 40 50 60 70 80 90 100
aver
age
posi
tive
acce
lera
tion
in m
/s²
vehicle speed in km/h
a_pos_ave, WWW
a_pos_ave, EU
a_pos_ave, WLTC rev2
a_pos_ave, WLTC cand pos acc only 27102011
a_pos_ave, WLTC rev3 111108
a_pos_ave, WLTC v3 HS_JP_HS
Comparison of aver. a_pos values
4Figure 1
H.S.H.S.
0
1
2
3
4
5
6
7
8
9
10
0 10 20 30 40 50 60 70 80 90 100
aver
age
v*a_
pos i
n m
²/s³
average speed in km/h
v*a_pos_ave, WWW database
v*a_pos_ave, EU database
v*a_pos_ave, WLTC rev2 cycle
v*a_pos_ave, WLTC cand pos acc only 27102011 cycle
v*a_pos_ave, WLTC rev3 111108
v*a_pos_ave, WLTC v3 HS_JP_HS
Comparison of aver. v*a_pos values
5Figure 2
H.S.H.S.Comparison of RPA values
6Figure 16
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0 10 20 30 40 50 60 70 80 90 100
RPA
in k
Ws/
(kg*
km)
average speed in km/h
RPA, WWW database
RPA, EU database
RPA, WLTC rev2 cycle
RPA, WLTC cand pos acc only 27102011 cycle
RPA, WLTC rev3 111108
RPA, WLTC v3 HS_JP_HS
H.S.H.S.Vehicle speed distributions
7
• Figures 4 to 7 show comparisons of the vehicle speed distributions between databases and cycles for the 4 speed classes.
• Figures 8 to 11 show corresponding comparisons of the positive acceleration distributions.
• Figures 12 to 15 show corresponding comparisons of the positive v*a distributions.
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 10 20 30 40 50 60 70
cum
freq
uenc
y
v in km/h
low, EU database
low, WWW database
low, WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Vehicle speed distributions, low
8Figure 4
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 10 20 30 40 50 60 70 80 90
cum
freq
uenc
y
v in km/h
medium, EU database
medium, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Vehicle speed distributions, medium
9Figure 5
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 20 40 60 80 100 120
cum
freq
uenc
y
v in km/h
high, EU database
high, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Vehicle speed distributions, high
10Figure 6
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 20 40 60 80 100 120 140 160
cum
freq
uenc
y
v in km/h
extra high, EU database
extra high, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Vehicle speed distributions, extra high
11Figure 7
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 0.5 1 1.5 2
cum
freq
uenc
y
a in m/s²
low, EU database
low, WWW database
low, WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Acceleration distributions, low
12Figure 5
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 0.5 1 1.5 2
cum
freq
uenc
y
a in m/s²
medium, EU database
medium, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Acceleration distributions, medium
13Figure 6
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 0.5 1 1.5 2
cum
freq
uenc
y
a in m/s²
high, EU database
high, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Acceleration distributions, high
14Figure 7
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 0.5 1 1.5 2
cum
freq
uenc
y
a in m/s²
extra high, EU database
extra high, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
Acceleration distributions, extra high
15Figure 8
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 5 10 15 20
cum
freq
uenc
y
v*a_pos in m²/s³
low, EU database
low, WWW database
low, WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
v*a_pos distributions, low
16Figure 10
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 5 10 15 20 25
cum
freq
uenc
y
v*a_pos in m²/s³
medium, EU database
medium, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
v*a_pos distributions, medium
17Figure 11
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 5 10 15 20 25
cum
freq
uenc
y
v*a_pos in m²/s³
high, EU database
high, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
v*a_pos distributions, high
18Figure 12
H.S.H.S.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 5 10 15 20 25
cum
freq
uenc
y
v*a_pos in m²/s³
extra high, EU database
extra high, WWW database
WLTC rev2
WLTC cand pos acc only, 27102011
WLTC v3 111108
WLTC v3 HS_JP_HS4
v*a_pos distributions, extra high
19Figure 13
H.S.H.S.Comparison of estimates for hot CO2 emissions
20
• Estimates of the hot CO2 emissions for the databases as well as for the cycles are shown in table 1.
H.S.H.S.Comparison of CO2 emissions
21
region / cycle
speed partv_ave wo stops in
km/hp_stop
v_ave with stops in
km/h
e_CO2 wo stops in
g/km
e_CO2 total in g/km
contribution of stops in
g/km
contri-bution of stops in %
Comparison to WWW database
Comparison to EU
databaselow 25.7 24.5% 19.4 159.6 179.4 19.8 11.0%
medium 44.2 12.2% 38.8 133.9 138.8 4.9 3.6%high 62.7 6.0% 59.0 128.4 130.0 1.6 1.2%
extra high 91.6 2.0% 89.8 143.0 143.4 0.3 0.2%total 53.6 12.8% 46.7 138.8 143.1 4.3 3.0%low 25.1 19.0% 20.3 161.3 176.0 14.7 8.3%
medium 43.7 8.6% 39.9 131.8 135.2 3.4 2.5%high 58.6 4.3% 56.1 125.6 126.8 1.2 0.9%
extra high 91.4 1.4% 90.1 145.5 145.7 0.2 0.2%total 55.2 9.3% 50.1 140.5 142.8 2.3 2.0%low 24.8 25.3% 18.2 152.8 175.7 22.9 13.1% -2.1% -0.2%
medium 47.1 11.1% 41.6 122.7 127.0 4.3 3.4% -8.5% -6.0%high 59.6 6.6% 55.5 125.7 127.6 1.9 1.5% -1.8% 0.6%
extra high 87.9 2.2% 86.0 146.4 146.8 0.4 0.3% 2.4% 0.7%total 52.6 13.6% 45.4 135.6 140.3 4.7 3.3% -1.9% -1.7%low 26.5 25.3% 19.5 150.4 171.7 21.4 12.5% -4.3% -2.4%
medium 46.3 11.1% 41.1 127.8 132.0 4.2 3.2% -4.9% -2.4%high 59.9 6.6% 55.8 125.1 127.0 1.9 1.5% -2.3% 0.1%
extra high 87.3 2.2% 85.4 144.2 144.6 0.4 0.3% 0.9% -0.8%total 52.8 13.5% 45.7 135.6 140.2 4.6 3.3% -2.0% -1.8%low 25.1 25.3% 18.7 157.6 179.8 22.3 12.4% 0.2% 2.2%
medium 44.3 11.1% 39.4 130.7 136.0 4.4 3.3% -2.0% 0.6%high 59.8 6.6% 55.8 125.1 127.0 1.9 1.5% -2.3% 0.1%
extra high 90.6 2.2% 88.7 147.6 147.9 0.4 0.3% 3.2% 1.5%total 25.7 13.5% 45.6 138.6 143.3 4.7 3.2% 0.1% 0.4%
WLTC rev3 HS_JP_HS4
WWW database
EU regional database
WLTC rev2 cycle
WLTC rev3 111108 Ta
ble
1
H.S.H.S.Comparison of Sums of least squares between database and cycle
22
• The sum of least squared differences between database and cycle distributions are shown in table 2.
• All means negative and positive values, pos means positive values only.
• Stop phases are disregarded in any case.
H.S.H.S.Comparison of least squares
23
Table 2
range IDcycle cycle part ssd_v*a ssd_a ssdp_v ssd_allall 43 WLTC rev2 low 0.00288 0.00295 0.00338 0.00921all 53 WLTC v3 111108 low 0.00796 0.00369 0.00975 0.02140all 63 WLTC v3 HS_JP_HS4 low 0.00985 0.00463 0.01512 0.02960
pos 43 WLTC rev2 low 0.02449 0.00810 0.00338 0.03597pos 53 WLTC v3 111108 low 0.01908 0.00957 0.00975 0.03841pos 63 WLTC v3 HS_JP_HS4 low 0.01809 0.00990 0.01512 0.04311all 43 WLTC rev2 medium 0.00516 0.00402 0.00553 0.01471all 53 WLTC v3 111108 medium 0.00380 0.00313 0.00399 0.01091all 63 WLTC v3 HS_JP_HS4 medium 0.00411 0.00358 0.00515 0.01283
pos 43 WLTC rev2 medium 0.00883 0.00789 0.00553 0.02225pos 53 WLTC v3 111108 medium 0.00961 0.00645 0.00399 0.02004pos 63 WLTC v3 HS_JP_HS4 medium 0.00924 0.00706 0.00515 0.02144all 43 WLTC rev2 high 0.00834 0.00948 0.02020 0.03803all 53 WLTC v3 111108 high 0.00847 0.00954 0.02038 0.03839all 63 WLTC v3 HS_JP_HS4 high 0.00847 0.00954 0.02038 0.03839
pos 43 WLTC rev2 high 0.01545 0.01497 0.02020 0.05062pos 53 WLTC v3 111108 high 0.01498 0.01508 0.02038 0.05044pos 63 WLTC v3 HS_JP_HS4 high 0.01498 0.01508 0.02038 0.05044all 43 WLTC rev2 extra high 0.01542 0.01854 0.07676 0.11072all 53 WLTC v3 111108 extra high 0.01511 0.01791 0.06986 0.10289all 63 WLTC v3 HS_JP_HS4 extra high 0.01379 0.01689 0.04518 0.07586
pos 43 WLTC rev2 extra high 0.02436 0.02930 0.07676 0.13043pos 53 WLTC v3 111108 extra high 0.02375 0.02758 0.06986 0.12119pos 63 WLTC v3 HS_JP_HS4 extra high 0.02675 0.03352 0.04518 0.10546
sum of least square differences
H.S.H.S.Time series of the different cycle versions
24
• Figures 14 to 17 show the time series of the different cycle versions.
H.S.H.S.
0
10
20
30
40
50
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70
80
90
100
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120
130
140
0 60 120 180 240 300 360 420 480 540 600
vehi
cle
spee
d in
km
/h
time in s
WLTC rev2
WLTC v3 111108
WLTC v3 HS_JP_HS4
Time series, low
25Figure 14
H.S.H.S.
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
600 660 720 780 840 900 960 1,020
vehi
cle
spee
d in
km
/h
time in s
WLTC rev2
WLTC v3 111108
WLTC v3 HS_JP_HS4
Time series, medium
26Figure 15
H.S.H.S.
0
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140
1,020 1,080 1,140 1,200 1,260 1,320 1,380 1,440 1,500
vehi
cle
spee
d in
km
/h
time in s
WLTC rev2
WLTC v3 111108
WLTC v3 HS_JP_HS4
Time series, high
27Figure 16
H.S.H.S.
0
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20
30
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60
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100
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140
1,440 1,500 1,560 1,620 1,680 1,740 1,800
vehi
cle
spee
d in
km
/h
time in s
WLTC rev2
WLTC v3 111108
WLTC v3 HS_JP_HS4
Time series, extra high
28Figure 17