Pilot Study, Fault Identification and Effect of Maintenance

Diesel Vehicle Emissions – In-Service Emissions Testing – Pilot Study, Fault Identification and Effect of Maintenance - Appendices
PM Ranked Mass Normalised Emissions
MC & NA Vehicles < 3.5t GVM (1996 to 2000)
% above Class average
300
250
200
150
100
50
0
-50
Repair
Threshold
Vehicle 1309
206 mg/km.t
Class Average
128.9 mg/km.t
Original test
After repair
515
451
386
322
258
193
129
64
PM Em issions (m g/km .t)
-100
0 10 20 30 40 50 60
0
Rank of Emissions
Figure A9-4
NOx Ranked Mass Normalised Emissions
MC & NA Vehicles < 3.5t GVM (1996 to 2000)
% above Class average
100
80
60
40
20
0
-20
-40
-60
Repair Threshold
Vehicle 1695
1.07 g/km.t
Class Average
Original test
After repair
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.6
0.4
NOx Em issions (g/km.t)
-80
0.92 g/km.t
0.2
-100
0 10 20 30 40 50 60
0.0
Rank of Emissions
Figure A9-5
Average Smoke Opacity Ranked Mass Normalised Emissions
MC & NA Vehicles < 3.5t GVM (1996 to 2000)
200
30
% above class average
150
100
50
0
-50
Repair Threshold
Vehicle 1752
16.1%
Class Average
10.5%
Original tes t
After repair
25
20
15
10
5
Average Opacity (%)
-100
0 10 20 30 40 50 60
0
Rank of Emissions
Figure A9-6
Page 92