r ainer vogt , volker scheer, roberto casati ford forschungszentrum aachen gmbh
DESCRIPTION
Comparison of PM exhaust emission measurements: C hassis dynamometer versus on-road chasing. R ainer Vogt , Volker Scheer, Roberto Casati Ford Forschungszentrum Aachen GmbH. Objectives. - PowerPoint PPT PresentationTRANSCRIPT
FFA contribution to PARTICULATES
Rainer Vogt, Volker Scheer, Roberto Casati
Ford Forschungszentrum Aachen GmbH
Comparison of PM exhaust emissionComparison of PM exhaust emissionmeasurements: Cmeasurements: Chassis dynamometer hassis dynamometer
versus versus on-road chasing on-road chasing
FFA contribution to PARTICULATES
ObjectivesObjectives• To measure the PM emissions of the VW TDI by chasing the exhaust plume with the Ford Mobile Laboratory (FML) at three constant speeds and fixed distance on a test trace
• To measure the PM emissions of the VW TDI with the PARTICULATES dilution system at the FFA chassis dynamometer at the same constant speeds and during the NEDC
• To compare the results obtained with the PARTICULATES dilution system with real-world dilution measured during chasing the exhaust plume with a special focus on nucleation particles
FFA contribution to PARTICULATES
On-road chasing of exhaust plumeOn-road chasing of exhaust plume
Test vehicle:1.8 l Dieselspeed, fuel consumption exhaust temperatures
Ford Mobile Lab:SMPS, CPC, NOx, CO, T and RH
Test track: high speed oval, 4 km/lap
FFA contribution to PARTICULATES
In-let for on-road sampling In-let for on-road sampling
FFA contribution to PARTICULATES
Exhaust chasing of diesel vehicle Exhaust chasing of diesel vehicle at different speedsat different speeds
Diesel car, 40 ppm S fuel,distance 14 m, T=19°C, RH=60%
0
200
400
600
800
NO
x / p
pb
0
40000
80000
120000
160000
N /
# cm
-3
NOxN
0
100
200
300
400
11:50 12:00 12:10 12:20 12:30
T /
°C,
spee
d / k
m h
-1
0
20
40
60
80
fuel
/ m
g st
roke
-1
T post-cat.T pre-muffl.T post-muffl.T tailpipespeedfuel
FFA contribution to PARTICULATES
PM size distribution during chasing atPM size distribution during chasing atdifferent speeds: 360 ppm S fuel different speeds: 360 ppm S fuel
Diesel car #1; 360 ppm S fuel; with oxidation catalyst;14m distance; T=14°C; RH=50%
1E+11
1E+12
1E+13
1E+14
1E+15
1E+16
10 100 1000
Dp / nm
dN
/dlo
g(D
p)
/ #
km-1 120 km/h; 0.4 s
100 km/h; 0.5 s70 km/h; 0.7 s50 km/h; 1.0 s
FFA contribution to PARTICULATES
Time evolution of nucleation mode Time evolution of nucleation mode particlesparticles
0100200300T / °C ; speed / km h-1
09:3509:4009:4509:5009:5510:0010:0510:10
T post-cat.T pre-mufflerT post-mufflerT tailpipespeed
10 20 30 40 50 60 80 100 200 300
0,0
E+
00
1,0
E+
14
2,0
E+
14
3,0
E+
14
dN/dlog(Dp) / # km-1
Dp / nm
Diesel car, 320 ppm S fuel, T=17°C, RH=57%
FFA contribution to PARTICULATES
Dynanometer exhaust dilution & Dynanometer exhaust dilution & sampling sampling
FFA contribution to PARTICULATES
Principle of the Matter-DiluterPrinciple of the Matter-Diluter
FFA contribution to PARTICULATES
Diesel car #1; 350 ppm S fuel; with oxidation catalyst;roller dyno; rotating disc diluter; T=25°C; RH=50%
1.E+11
1.E+12
1.E+13
1.E+14
1.E+15
1.E+16
10 100 1000
Dp / nm
dN/d
log(
Dp)
/ #
km
-1 120 km/h100 km/h70 km/h50 km/h
Dynamometer at different speeds: 350 ppmSDynamometer at different speeds: 350 ppmS
FFA contribution to PARTICULATES
DeliverablesDeliverables
· • Emission factors for particle number and size as measured by the PARTICULATES sampling system at three constant speeds and during the NEDC
• Emission factors for particle number and size as measured during exhaust chasing on a test track with the same vehicle and the same constant speeds
• Comparison of the chassis dynamometer results with the results from the exhaust chase experiments to provide the link to real atmospheric dilution conditions
FFA contribution to PARTICULATES
ScheduleSchedule
Dec. 2002 - Feb.2003 Preparation of chasing and dyno measurements
March 2003 Chasing on test track and chassis dynanometer
April-June 2003 Data evaluation and reporting