Pilot Study, Fault Identification and Effect of Maintenance

Diesel Vehicle Emissions – In-Service Emissions Testing – Pilot Study, Fault Identification and Effect of Maintenance - Appendices
Original
Test No
Rank
NOx
(g/km.t)
Table A7-5
Category 7 + 8 Minor Repair Results
Before Repair
After Repair
PM
(mg/km.t)
Average
Opacity
(%)
Vehicle
Condition
NOx
(g/km.t)
PM
(mg/km.t)
Average
Opacity
(%)
Vehicle
Condition
Total Cost
($)
1427 4 0.7 157 33 4 0.7 56 19 2 $915 7
1194 17 0.9 108 18 2 1.1 57 18 2 $1,043 8
1213 23 1.1 91 19 2 1.2 96 22 2 $1,224 6
1463 24 1.1 90 21 2 1.0 41 16 2 $838 7
1301 30 0.5 111 17 2 0.7 61 10 2 $60 1
1289 33 0.6 99 21 3 0.8 46 13 2 $1,038 7
1380 34 1.3 62 17 3 1.2 62 23 2.5 $2,228 24
955 38 0.8 88 20 3 0.8 57 18 2.5 $785 6
1206 41 1.3 50 9 1 1.7 27 11 1 $165 3
1554 58 1.4 35 12 3 1.4 19 7 2 $1,330 7
Average 1.0 89 19 2.5 1.0 52 16 2.0 $963 8
Repair
Time
(hours)
10000
Cost Benefit
Average of 10 Vehicles Repaired
ME & NC Vehicles 12t - 25t GVM (1980 to 1995)
Results
1000
100
10
1
1.0
1.0
89
52
19
16
Original Test
After M inor Repair
Category Average
3 2
$963
8
0
NOx (g/km.t) PM (mg/km.t) Average
Opacity (%)
Vehicle
Condition
Total Cost ($)
Repair Time
(hours)
Parameters Measured
Figure A7-41
% change (post/pre)
30
20
10
0
-10
-20
-30
-40
-50
-60
8.1
NOx
(g/km.t)
Cost Benefit
Average of 10 Vehicles Repaired
ME & NC Vehicles 12t - 25t GVM (1980 to 1995)
$ 963 - Average Cost
$ 2228 - Max Cost
$ 60 - Min Cost
PM
(mg/km.t)
-41.5
Parameters Measured
Figure A7-42
Average
Opacity
(%)
-16.3
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