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JASIC (Japan)
Results of engine speed frequency analysis in actual driving around
Tokyo metropolitan area
Presented in WWH-OCE Plenary Meeting (Chicago, Sept. 2005)
Actual Driving AnalysisSummary
• 9 vehicles (3 Light-Duty(GVW5t), 3Medium-Duty (GVW8t), 3Heavy-Duty (GVW25t)).
• Rural, urban, urban high-way road driving in Tokyo metropolitan area.
• 5 days total 30 hour driving data for each vehicle• Every 1 second engine speed data with 0.5Hz
filtering.• Engine torque estimation using vehicle speed
and acceleration rate.• Data in vehicle deceleration and idling excluded
in the analysis .
Conclusions• Engine speed range in actual driving around
Tokyo is mainly low speed operation, especially in LDT case.
• 1000-2000r/min range is mostly used for LDT engines of over 3000r/min rated speed.
• 1000-1800r/min range is mostly used for MDT engines of around 3000r/min rated speed.
• 900-1500r/min range is mostly used for HDT engines of around 2000r/min rated speed.
• The range is mostly covered in WHTC operation, but have certain difference with WNTE zone.
WNTE zone enlargement• We believe enlargement of WNTE zone is
necessary to better reflect actual driving patterns.
• We propose expanding WNTE minimum speed range from Nlo+0.15(Nhi-Nlo) to Nlo.
Sources1. Comparison with Japan JE05 mode operating
point vs. WNTE zone2. Comparison with WHDC mode operating point
vs. WNTE zone3. Results of engine speed frequency analysis in
actual driving around Tokyo metropolitan area
5
NTE Control Area(Idle speed:500rpm Rated speed:1800rpm)
-500
0
500
1000
1500
2000
2500
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Engine Speed (rpm)
Tor
que
(Nm
)
JE05 Mode pointMax Torque30%max power70%max power=nhi30%max torqueB Speed(1564rpm)NTE low speed(1083rpm)PM carve-outD13-40%rpmD13-60%rpmD13-80%rpm55%max power=nlo
nlo=55%max power engine speed nhi=70%max power engine speed NTElo=nlo+0.15(nhi-nlo) B speed=nlo+0.5*(nhi-nlo)
Comparison with Japan JE05 mode operating point vs. WNTE zone
Enlargement proposal
NloNlo+0.15*(Nhi-Nlo)
NTE Control Area(heavy duty)(rated speed:1800rpm)
-500
0
500
1000
1500
2000
2500
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
engine speed(rpm)
torq
ue(N
m)
WHTC Mode pointMax Torque30%max power55%max power=nlo70%max power=nhi30%max torqueB Speed(1564rpm)NTE low speed(1083rpm)PM carve-outWHSC Mode point
nlo=55%max power engine speednhi=70%max power engine speedNTElo=nlo+0.15*(nhi-nlo)B speed=nio+0.5*(nhi-nlo)
Comparison with WHDC mode operating point vs. WNTE zone
Appendix
Results of Engine Speed Frequency Analysis of Actual Driving around Tokyo metropolitan area
Main Specifications of Test Vehicles
Driving Conditions(1) Urban(2) Rural(3) Motorway (Tokyo Metropolitan expressway)
Data sources ( 5days x 6hr ) / Vehicle
Code No 0001 0004 0052 0044 0048 0054 0005 0046 0053
Model year 1998 1998 2003 1998 2003 2003 1999 1999 2003
Regulation long term long term new short term long term new short termnew short term long term long term new short term
Gross Vehicle Weight (kg) 4,745 4,935 5,145 7,990 7995 7,990 24,930 24,910 24,940
Weight of vehicle (kg) 2,580 2,770 2,980 5,030 5380 5,030 11,220 11,300 11,830
Amount of the maximum loading (kg) 2,000 2,000 2,000 2,850 2450 2,850 13,600 13,500 13,000
Ride capacity (person) 3 3 3 2 3 2 2 2 2
No. of gears and Transmission type 5MT 6MT 5MT 6MT 6MT 6MT 7AMT 7MT 12AMT
Engine displ.
(L) 4.33 4.90 4.77 7.96 7.16 7.16 21.20 10.52 14.25
Idling engine speed (rpm) 580 650 580 550 530 530 450 450 500
Max power (kW/rpm) 81/3100 103/3000 103/3000 173/2700 140/2900 140/2900 265/2200 250/2100 272/1750
Max torque (N・m/rpm) 275/1500 353/1600 333/1500 706/1600 500/1500 500/1500 1255/1200 1412/1100 1814/1200Aspiration NA/Tc) NA NA NA Tc(IC) NA NA NA Tc(IC) Tc(IC)
EGR w/ w/ w/ w/o w/ w/ w/ w/o w/
veh
icle
data
E ng
ine d
ata
NTE zone frequency(5days data)
0
50
100
150
200
250
300
0 1000 2000 3000 4000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
Vehicle 0001 (GVW 5t)Comparison with actual driving patterns vs. WNTE zone
1/10
0
50
100
150
200
250
300
0 1000 2000 3000 4000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power50% max power70% max power30% max torqueNTE low speedA speedB speedC speednlonhi2400-50%
nlo A B C nhi speed speed speed
PM carve-out
NTE Control
Engine Speed accumulation frequency (5days data)
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0001 (GVW 5t)
note: except Idling and deceleration
Vehicle 0004 (GVW 5t)
frequency(5days data)
NTE zone
0
50
100
150
200
250
300
350
400
0 1000 2000 3000 4000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
Comparison with actual driving patterns vs. WNTE zone
1/10
0
50
100
150
200
250
300
350
400
0 1000 2000 3000 4000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power50% max power70% max power30% max torqueNTE low speedA speedB speedC speednlonhi2400-50%
nlo A B C nhi speed speed speed
PM carve-out
NTE Control Area
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0004 (GVW 5t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
NTE zone frequency(5days data)
Vehicle 0052 (GVW 5t)Comparison with actual driving patterns vs. WNTE zone
0
50
100
150
200
250
300
350
400
0 1000 2000 3000 4000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
1/10
0
50
100
150
200
250
300
350
400
0 1000 2000 3000 4000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power50% max power70% max power30% max torqueNTE low speedA speedB speedC speednlonhi2400-50%
nlo A B C nhi speed speed speed
PM carve-out
NTE Control Area
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0052 (GVW 5t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
NTE zone frequency(5days data)
0
100
200
300
400
500
600
700
800
0 1000 2000 3000 4000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
Vehicle 0044 (GVW 8t)Comparison with actual driving patterns vs. WNTE zone
1/10
0
100
200
300
400
500
600
700
800
0 1000 2000 3000 4000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power50% max power70% max power30% max torqueNTE low speedA speedB speedC speednlonhi2400-50%
nlo A B C nhi speed speed speed
NTE Control Area
PM carve-out
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0044 (GVW 8t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
NTE zone frequency(5days data)
0
100
200
300
400
500
600
0 1000 2000 3000 4000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
Vehicle 0048 (GVW 8t)Comparison with actual driving patterns vs. WNTE zone
1/10
0
100
200
300
400
500
600
0 1000 2000 3000 4000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power50% max power70% max power30% max torqueNTE low speedA speedB speedC speednlonhi2400-50%
nlo A B C nhi speed speed speed
NTE Control Area
PM carve-out
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0048 (GVW 8t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
NTE zone frequency(5days data)
Vehicle 0054 (GVW 8t)Comparison with actual driving patterns vs. WNTE zone
0
100
200
300
400
500
600
0 1000 2000 3000 4000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
1/10
0
100
200
300
400
500
600
0 1000 2000 3000 4000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power50% max power70% max power30% max torqueNTE low speedA speedB speedC speednlonhi2400-50%
nlo A B C nhi speed speed speed
NTE Control Area
PM carve-out
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0054 (GVW 8t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
NTE zone frequency(5days data)
0
200
400
600
800
1000
1200
1400
0 1000 2000 3000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
Vehicle 0005 (GVW 25t)Comparison with actual driving patterns vs. WNTE zone
1/10
0
200
400
600
800
1000
1200
1400
0 1000 2000 3000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power70% max power50% max power30% max torqueNTE low speedA speedB speedC speednlonhi
nlo A B C nhi speed speed speed
PM carve-out
NTE Control Area
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0005 (GVW 25t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
NTE zone frequency(5days data)
Vehicle 0046 (GVW 25t)Comparison with actual driving patterns vs. WNTE zone
0
200
400
600
800
1000
1200
1400
1600
0 1000 2000 3000Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
1/10
0
200
400
600
800
1000
1200
1400
1600
0 1000 2000 3000
Engine speed rpm
To
rqu
e N
m
Max torque30% max power70% max power50% max power30% max torqueNTE low speedA speedB speedC speednlonhi
nlo A B C nhi speed speed speed
PM carve-out
NTE Control Area
Vehicle 0046 (GVW 25t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
NTE zone frequency(5days data)
Vehicle 0053 (GVW 25t)Comparison with actual driving patterns vs. WNTE zone
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0 500 1000 1500 2000 2500Engine Speed (r/ min)
Engi
ne T
orqu
e (N
m)
1/10
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0 500 1000 1500 2000 2500
Engine speed rpm
To
rqu
e N
m
Max torque30% max power70% max power50% max power30% max torqueNTE low speedA speedB speedC speednlonhi
nlo A B C nhi speed speed speed
PM carve-out
NTE Control Area
0.0
20.0
40.0
60.0
80.0
100.0
120.0
0 1000 2000 3000 4000Engine Speed (rpm)
Freq
uenc
e (%
)
FrequenceNTE_lon_lon_hiB_SpeedNTE_region
Vehicle 0053 (GVW 25t)
Engine Speed accumulation frequency (5days data)
note: except Idling and deceleration
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