jasic (japan) results of engine speed frequency analysis in actual driving around tokyo metropolitan...

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


frequency(5days data)

NTE zone

0

50

100

150

200

250

300

350

400


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



PM carve-out

NTE Control Area