iii diesel testing
Post on 17-Nov-2015
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DESCRIPTION
TRANSCRIPT
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FTP
Real World vs Lab
US06
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Real World Emissions
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Real World Bus Emissions
bus_data
license_datesamp_lengthavg_vi_mphco_bhpco2_bhpnox_bhphc_bhpavg_mpg
Bus36010/25/01806110.49914402681.5327267088393.28089070846.94667038830.28439647692.6563255179
Bus36110/25/01564423.64636782421.2307902197392.70995570525.91412473420.12626718646.6230935507
Bus36310/24/01806913.81790804310.8758619408390.82002850425.6492824390.02953550637.6132742595
Bus36410/26/01568817.71496132211.0546061885369.4758473985.31767932490.31271888196.3928516174
Bus37210/26/01528321.42827938671.0595343555407.0440885864.63363240580.19405451456.5224834374
Bus37510/25/01785815.6903028761.4974560957388.25871086795.55608679050.14549554595.7911860524
Bus37710/24/01809112.09754047710.7939451242390.96107403295.16943517490.05299653943.9482758621
Bus37910/23/01788815.1029538541.3972718053400.15673301225.68331389450.15818737323.6233303753
Bus38010/23/01802313.02565125261.2476243301410.78553035028.61336657110.10070385142.8967904774
Bus38110/22/01729516.31735435231.261564085399.41110623717.15857162440.06671034965.9260520905
Bus38210/17/01314019.92939490451.811544586378.25767197458.82228662420.10688152876.7316974522
Bus38310/19/01795118.23514023391.0314979248413.33608602697.61488869320.22115620686.0977537417
Bus38410/17/01846118.24461647561.3403392034393.12724618848.87307410470.14270452677.199700981
Bus38510/18/01843116.54313841771.6913865496390.87647372797.53759103310.16513201287.3496382398
Bus38610/19/011034717.30614670921.7983550788384.03535710836.62393737320.14033855225.9454924133
averages1.2732963655394.17867452286.67785741450.150495755.6694609754
ucl1.3523972198397.09324448047.0268354920.17028451396.0730318835
lcl1.1941955112391.26410456536.3288793370.13070698625.2658900672
bus_THC
license_datesamp_lengthavg_vi_mphhc_bhp
Bus36310/24/01806913.81790804310.0295355063
Bus37710/24/01809112.09754047710.0529965394
Bus38110/22/01729516.31735435230.0667103496
Bus38010/23/01802313.02565125260.1007038514
Bus38210/17/01314019.92939490450.1068815287
Bus36110/25/01564423.64636782420.1262671864
Bus38610/19/011034717.30614670920.1403385522
Bus38410/17/01846118.24461647560.1427045267
Bus37510/25/01785815.6903028760.1454955459
Bus37910/23/01788815.1029538540.1581873732
Bus38510/18/01843116.54313841770.1651320128
Bus37210/26/01528321.42827938670.1940545145
Bus38310/19/01795118.23514023390.2211562068
Bus36010/25/01806110.49914402680.2843964769
Bus36410/26/01568817.71496132210.3127188819
average0.1584102533
.25_std0.0186330798
THC_chart
0.02953550630.15841025330.01863307980.0186330798
0.0529965394
0.0667103496
0.1007038514
0.1068815287
0.1262671864
0.1403385522
0.1427045267
0.1454955459
0.1581873732
0.1651320128
0.1940545145
0.2211562068
0.2843964769
0.3127188819
&A
Page &P
hc_bhp
average
bus_NOx
license_datesamp_lengthavg_vi_mphnox_bhpMOBILE6STANDARD
Bus37210/26/01528321.42827938674.63363240584.475
Bus37710/24/01809112.09754047715.16943517494.475
Bus36410/26/01568817.71496132215.31767932494.475
Bus37510/25/01785815.6903028765.55608679054.475
Bus36310/24/01806913.81790804315.6492824394.475
Bus37910/23/01788815.1029538545.68331389454.475
Bus36110/25/01564423.64636782425.91412473424.475
Bus38610/19/011034717.30614670926.62393737324.475
Bus36010/25/01806110.49914402686.94667038834.475
Bus38110/22/01729516.31735435237.15857162444.475
Bus38510/18/01843116.54313841777.53759103314.475
Bus38310/19/01795118.23514023397.61488869324.475
Bus38010/23/01802313.02565125268.61336657114.475
Bus38210/17/01314019.92939490458.82228662424.475
Bus38410/17/01846118.24461647568.87307410474.475
average6.8200220551.5257320034
MOBILE64.471.364004411
Standard5
NOX_chart
4.63363240584.475
5.16943517494.475
5.31767932494.475
5.55608679054.475
5.6492824394.475
5.68331389454.475
5.91412473424.475
6.62393737324.475
6.94667038834.475
7.15857162444.475
7.53759103314.475
7.61488869324.475
8.61336657114.475
8.82228662424.475
8.87307410474.475
&A
Page &P
On-Road Data On 15 1996 MY Urban Buses:36% higher than standard52% higher than MOBILE6 prediction from cert data
On-Road Bus Data
MOBILE6
Emission Standard
Average NOx (g/bhp-hr)
bus_CO2_data
license_datesamp_lengthavg_vi_mphco2_bhp
Bus36410/26/01568817.7149613221369.475847398
Bus38210/17/01314019.9293949045378.2576719745
Bus38610/19/011034717.3061467092384.0353571083
Bus37510/25/01785815.690302876388.2587108679
Bus36310/24/01806913.8179080431390.8200285042
Bus38510/18/01843116.5431384177390.8764737279
Bus37710/24/01809112.0975404771390.9610740329
Bus36110/25/01564423.6463678242392.7099557052
Bus38410/17/01846118.2446164756393.1272461884
Bus36010/25/01806110.4991440268393.2808907084
Bus38110/22/01729516.3173543523399.4111062371
Bus37910/23/01788815.102953854400.1567330122
Bus37210/26/01528321.4282793867407.044088586
Bus38010/23/01802313.0256512526410.7855303502
Bus38310/19/01795118.2351402339413.3360860269
average395.2186395022
.25_std2.4848627478
CO2_chart
369.475847398395.21863950222.48486274782.4848627478
378.2576719745Bus382
384.0353571083Bus386
388.2587108679Bus375
390.8200285042Bus363
390.8764737279Bus385
390.9610740329Bus377
392.7099557052Bus361
393.1272461884Bus384
393.2808907084Bus360
399.4111062371Bus381
400.1567330122Bus379
407.044088586Bus372
410.7855303502Bus380
413.3360860269Bus383
&A
Page &P
co2_bhp
average
bus_CO_data
license_datesamp_lengthavg_vi_mphco_bhp
Bus37710/24/01809112.09754047710.7939451242
Bus36310/24/01806913.81790804310.8758619408
Bus38310/19/01795118.23514023391.0314979248
Bus36410/26/01568817.71496132211.0546061885
Bus37210/26/01528321.42827938671.0595343555
Bus36110/25/01564423.64636782421.2307902197
Bus38010/23/01802313.02565125261.2476243301
Bus38110/22/01729516.31735435231.261564085
Bus38410/17/01846118.24461647561.3403392034
Bus37910/23/01788815.1029538541.3972718053
Bus37510/25/01785815.6903028761.4974560957
Bus36010/25/01806110.49914402681.5327267088
Bus38510/18/01843116.54313841771.6913865496
Bus38610/19/011034717.30614670921.7983550788
Bus38210/17/01314019.92939490451.811544586
average1.3450399337
.25_std0.0733175803
CO_chart
0.79394512421.34503993370.07331758030.0733175803
0.8758619408Bus363
1.0314979248Bus383
1.0546061885Bus364
1.0595343555Bus372
1.2307902197Bus361
1.2476243301Bus380
1.261564085Bus381
1.3403392034Bus384
1.3972718053Bus379
1.4974560957Bus375
1.5327267088Bus360
1.6913865496Bus385
1.7983550788Bus386
1.811544586Bus382
&A
Page &P
co_bhp
average
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
The Ultimate Diesel Emission TestRefer back to the basic requirements:Accurately reflect actual useAccurately measure pollutantsRepeatableAffordablePrevent defeat devicesEnable in-use testing
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Recent DevelopmentsStandards established for non-road enginesBoth transient and steady-state tests requiredAn off-cycle test added NTE (not-to-exceed standard applied to most operating modes)Development of portable emission measurements for in-use testingComplete revision and standardization of heavy-duty certification tests proposed by EPADevelopment of a world-wide certification test
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and TestingHistorically, EPA relied on a defeat device prohibition to help ensure that vehicles and engines would meet standards in useA defeat device is any auxiliary emissions control device (AECD) (electronic, mechanical or otherwise) which reduces the effectiveness of the emission control system that is in effect under the specific test conditions but not in effect under normal operating conditions, except:
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and TestingExcept:If substantially included in the certification testIf needed for protection from accident or damageIf needed for engine startingImplementation of the defeat device regulation often requires case-by-case determinationsElectronically controlled engines have many AECDs
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and TestingThe NTE standard is applied in addition to the existing certification test cycle and standards and the existing defeat device prohibitionNTE expands coverage beyond the driving cycles and ambient temperatures in the certification testIt provides certainty to the manufacturers about the acceptability of AECDsNTE can be tested in-use
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and TestingNTE contains several key concepts:A defined engine operating region (engine speeds and loads)Defined ambient operating conditions (temperature and altitude)Defined in-use operating conditions (minimum of 30 seconds duration)Specified numerical emission limits (1.25 x the primary emission standard)
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and Testing(US EPA)
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2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and Testing(US EPA)
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Chart1
1013.251.22590
1007.261.2191389.415
1001.291.2132888.83
995.3591.2074688.245
989.4531.2016587.66
983.5761.1958787.075
977.7271.1901186.49
971.9061.1843785.905
966.1131.1786585.32
960.3491.1729584.735
Pressure (hPa)
Air Density (kg/m^3)
Temperature + 31F (F)
Chart3
9095100
89.41594.41599.415
88.8393.8398.83
88.24593.24598.245
87.6692.6697.66
87.07592.07597.075
86.4991.4996.49
85.90590.90595.905
85.3290.3295.32
84.73589.73594.735
84.1589.1594.15
83.56588.56593.565
82.9887.9892.98
82.39587.39592.395
81.811886.811891.8118
81.22586.22591.225
80.6485.6490.64
80.05585.05590.055
79.4784.4789.47
78.88583.88588.885
78.301883.301888.3018
77.716882.716887.7168
77.131882.131887.1318
76.546881.546886.5468
75.961880.961885.9618
75.378680.378685.3786
74.793679.793684.7936
74.208679.208684.2086
73.623678.623683.6236
73.038678.038683.0386
72.453677.453682.4536
71.868676.868681.8686
71.285476.285481.2854
70.700475.700480.7004
70.115475.115480.1154
69.530474.530479.5304
68.945473.945478.9454
68.362273.362278.3622
67.777272.777277.7772
67.192272.192277.1922
66.607271.607276.6072
Region 1
Region 2
Region 3
Temperature + 31F (F)
Temperature + 36 (F)
Temperature + 41(F)
Altitude (Feet relative to sea-level)
Ambient Temperature (degrees F)
Sheet1
ISO Standard Atmosphere
Geometeric Altitude (meters)Temperature (C)Geometeric Altitude (feet)Pressure (hPa)Air Density (kg/m^3)Temperature (F)Geometeric Altitude (feet)Temperature + 31F (F)Temperature + 36 (F)Temperature + 41(F)
015- 01.01E+031.22559.0- 09095100
5014.6751641.01E+031.2191358.4164899499
10014.353281.00E+031.2132857.8328899499
15014.0254929.95E+021.2074657.2492889398
20013.76569.89E+021.2016556.7656889398
25013.3758209.84E+021.1958756.1820879297
30013.059849.78E+021.1901155.5984869196
35012.7251,1489.72E+021.1843754.91,148869196
40012.41,3129.66E+021.1786554.31,312859095
45012.0751,4769.60E+021.1729553.71,476859095
50011.751,64053.21,640848994
55011.4251,80452.61,804848994
60011.11,96852.01,968838893
65010.7752,13351.42,133828792
70010.4512,29750.82,297828792
75010.1252,46150.22,461818691
8009.82,62549.62,625818691
8509.4752,78949.12,789808590
9009.152,95348.52,953798489
9508.8253,11747.93,117798489
10008.5013,28147.33,281788388
10508.1763,44546.73,445788388
11007.8513,60946.13,609778287
11507.5263,77345.53,773778287
12007.2013,93745.03,937768186
12506.8774,10144.44,101758085
13006.5524,26543.84,265758085
13506.2274,42943.24,429747984
14005.9024,59342.64,593747984
14505.5774,75742.04,757737883
15005.2524,92141.54,921727782
15504.9275,08540.95,085727782
16004.6035,24940.35,249717681
16504.2785,41339.75,413717681
17003.9535,57739.15,577707580
17503.6285,74138.55,741707580
18003.3035,90537.95,905697479
18502.9796,06937.46,069687378
19002.6546,23436.86,234687378
19502.3296,39836.26,398677277
20002.0046,56235.66,562677277
2050
2100
2150
Sheet2
Chart2
088.5714285714
0.189.7142857143
0.290.8571428571
0.392
0.493.1428571429
0.594.2857142857
0.695.4285714286
0.796.5714285714
0.897.7142857143
0.998.8571428571
1100
1.1101.1428571429
1.2102.2857142857
1.3103.4285714286
1.4104.5714285714
1.5105.7142857143
1.6106.8571428571
1.7108
1.8109.1428571429
1.9110.2857142857
2111.4285714286
2.1112.5714285714
2.2113.7142857143
2.3114.8571428571
2.4116
2.5117.1428571429
2.6118.2857142857
2.7119.4285714286
2.8120.5714285714
2.9121.7142857143
3122.8571428571
3.1124
3.2125.1428571429
3.3126.2857142857
3.4127.4285714286
3.5128.5714285714
3.6129.7142857143
3.7130.8571428571
3.8132
3.9133.1428571429
4134.2857142857
4.1135.4285714286
4.2136.5714285714
4.3137.7142857143
4.4138.8571428571
4.5140
4.6141.1428571429
4.7142.2857142857
4.8143.4285714286
4.9144.5714285714
5145.7142857143
127.10654241650
128.39188946020.1
129.67723650390.2
130.96258354760.3
132.24793059130.4
133.5332776350.5
134.81862467870.6
136.10397172240.7
137.38931876610.8
138.67466580980.9
139.96001285351
141.24535989721.1
142.53070694091.2
143.81605398461.3
145.10140102831.4
146.3867480721.5
147.67209511571.6
148.95744215941.7
150.24278920311.8
151.52813624681.9
152.81348329052
154.09883033422.1
155.38417737792.2
156.66952442162.3
157.95487146532.4
159.2402185092.5
160.52556555272.6
161.81091259642.7
163.09625964012.8
164.38160668382.9
165.66695372753
166.95230077123.1
168.23764781493.2
169.52299485863.3
170.80834190233.4
172.0936889463.5
173.37903598973.6
174.66438303343.7
175.94973007713.8
177.23507712083.9
178.52042416454
179.80577120824.1
181.09111825194.2
182.37646529564.3
183.66181233934.4
184.9471593834.5
186.23250642674.6
187.51785347044.7
188.80320051414.8
190.08854755784.9
191.37389460155
&C&"Arial,Bold"&16Figure 4
Intake Manifold Temperature
Engine Coolant Temperature
Temperature (F)
Intake Manifold Pressure (bar)
Cold Engine Operation Issue
Sheet3
IMT (F)ECT(F)
890
900.1
910.2
920.3
930.4
940.5
950.6
970.7
980.8
990.9
1001
1011.1
1021.2
1031.3
1051.4
1061.5
1071.6
1081.7
1091.8
1101.9
1112
1132.1
1142.2
1152.3
1162.4
1172.5
1182.6
1192.7
1212.8
1222.9
1233
1243.1
1253.2
1263.3
1273.4
1293.5
1303.6
1313.7
1323.8
1333.9
1344
1354.1
1374.2
1384.3
1394.4
1404.5
1414.6
1424.7
1434.8
1454.9
1465
1270
1280.1
1300.2
1310.3
1320.4
1340.5
1350.6
1360.7
1370.8
1390.9
1401
1411.1
1431.2
1441.3
1451.4
1461.5
1481.6
1491.7
1501.8
1521.9
1532
1542.1
1552.2
1572.3
1582.4
1592.5
1612.6
1622.7
1632.8
1642.9
1663
1673.1
1683.2
1703.3
1713.4
1723.5
1733.6
1753.7
1763.8
1773.9
1794
1804.1
1814.2
1824.3
1844.4
1854.5
1864.6
1884.7
1894.8
1904.9
1915
Chart 4
100
99.415
98.83
98.245
97.66
97.075
96.49
95.905
95.32
94.735
94.15
93.565
92.98
92.395
91.8118
91.225
90.64
90.055
89.47
88.885
88.3018
87.7168
87.1318
86.5468
85.9618
85.3786
84.7936
84.2086
83.6236
83.0386
82.4536
81.8686
81.2854
80.7004
80.1154
79.5304
78.9454
78.3622
77.7772
77.1922
76.6072
NTEMaximum temp. - 100 deg. F at sea-level down to 86 deg. F at 5,500 feet
Minimum temp. - no lower bound
Altitude - all altitudes less than or equal to 5,500 feet
Temperature + 41(F)
Altitude (Feet relative to sea-level)
Ambient Temperature (degrees F)
NTE Altitude & Temperature Regions
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
NTE Standards and Testing(US EPA)
-
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Manufacturer In-Use TestingPilot program in calendar years 2005 and 2006Minimum of 5 to a maximum of 10 vehicles per engine familyAll engine families over 1500 sales are tested over a four year periodPortable emission measurements of gaseous and particulate emissionsTest vehicles from at least two owner sources
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Portable Emission MeasurementDesign requirements:Simple installation on a wide variety of vehiclesUnattended operationWeather and tamper proofLow power consumptionRemote communicationMultiple measurement capabilitiesFlow measurementAmbient conditionsEngine speed, temperature, etc.
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
PEMS History of DevelopmentEPA investigated and developed on-highway application ROVERPhotograph from EPA
-
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
ROVER(US EPA)
-
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
ROVER(US EPA)
-
MHLH
7.34.75.1
124.3
54.7
154.1
264.5
313.6
363.1
93.3
A3.8
44.5
53.4
163.6
184.3
223.8
4.47.4
Consent Decree NTE Limit and Non-CD Guidance Limit for Post-7/31/99 LHDD/MHDD Trucks and Urban Buses
Error Band in NOx Measurement Accuracy
2/14/02
Engine Family
NTE NOx (g/bhp-hr)
MAXIMUM NTE NOx VALUES FROM FY01 & FY02 IN USE TESTING OF MHDD & LHDD TRUCKS
HHDD
21212121213.22121212121
38383838387.15.438383838
40404040404.24040404040
10.79.16.75.66.711.76.77.57.21713.86.5
CCCCC6.26.2CCCC
11111111118.37.37111111
13131313137.61313131313
24242424244.92424242424
3333333357.37.566.33333
34343434344.511.734343434
333336.333333
23232323236.12323232323
32323232324.53232323232
41414141416.16.25.9414141
BBBBB6.7BBBBB
77776.36.28.114.3777
28282828286.52828282828
29292929294.92929292929
252525252562525252525
27272727275.92727272727
NTE Limit for HHDD Trucks
Error Band in NOx Measurement Accuracy
2/14/02
Engine Family
NTE NOx (g/bhp-hr)
MAXIMUM NTE NOx VALUES FROM FY01 & FY02 IN USE TESTING OF HHDD TRUCKS
Sheet1
workbook barchart.xls2/14/02EFA
DATA USED IN BAR PLOT FOR HHDD AND MHDD AT 7.0 STD
ENGINESERIES NUMBERS---->
FAMILY#123456789101112
213.2
387.15.4
404.2
610.79.16.75.66.711.76.77.57.21713.86.5
C6.26.2
118.37.37
137.6
244.9
3357.37.566.3
344.511.7
36.3
236.1
324.5
416.16.25.9
B6.7
76.36.28.114.3
286.5
294.9
256
275.9
original source data
FAMILY#CATCATCumminsCumminsCumminsCumminsCumminsCumminsCumminsCumminsCumminsCumminsCumminsCumminsDDCDDCDDCMACKMACKMACKMACKVOLVO
213.2
387.15.4
404.2
610.79.16.75.66.711.76.77.57.21713.86.5
C6.26.2
118.37.37
137.6
244.9
3357.37.566.3
344.511.7
36.3
236.1
324.5
416.16.25.9
B6.7
76.36.28.114.3
286.5
294.9
256
275.9
DATA USED IN BAR PLOT FOR MHDD AND LHDD
ENGINESERIES NUMBERS---->
FAMILY#123456
17.34.75.1
124.3
854.7
154.1
264.5
313.6
363.1
93.3
A3.8
44.5
53.4
163.6
184.3
223.8
354.47.4
DATA USED IN BAR PLOT FOR 855NAE CUMMINS
TESTSERIES NUMBERS---->
NUMBER1234
Field Upgraded 370 ESP+ (at GFC)370 ESP+370 ESP+ Before Upgrade370 ESP+ After Upgrade (at Ryder)
10GFC11.7Field Upgraded 370 ESP+ (at GFC)
22GFC10.7Field Upgraded 370 ESP+
23GFC9.1Field Upgraded 370 ESP+
54RT6.7370 ESP+
60RR5.7370 ESP+ Before Upgrade
61RR6.2370 ESP+ After Upgrade (at Ryder)
62RR6.7370 ESP+ After Upgrade
1GFC7.5Field Upgraded 370 ESP+
2GFC7.2Field Upgraded 370 ESP+
3GFC17Field Upgraded 370 ESP+
4GFC13.8Field Upgraded 370 ESP+
14RT6.5370 ESP+
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Portable Emission Measurement(US EPA)EPA continued development for non-road applications SPOT
-
Non-road Exhaust Flow Device
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Portable Emission MeasurementWest Virginia University -MEMS measures CO2 and NOx additional work on particulate with a quartz crystal microbalanceCommissioned by the engine manufacturers as a part of the consent decreeWVU also operates a portable dynamometer for trucks and busesCapable of simulating up to 55,000 lbs inertia weight and equipped with full scale dilution tunnel
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
WVU Transportable Laboratory
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Portable Emission MeasurementRide along vehicle emission measurement system (RAVEM) developed by Engine, Fuel and Emissions Engineering, Inc.Measures gaseous emissions and samples particulate on a filterRecently used in the Mexico City pilot project to retrofit city buses
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
RAVEM
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Particle Number MeasurementMany different approaches evaluated in the UNECE Particulate Measurement Programme (PMP)Approaches include:Scanning Mobility Particle Sizer (SMPS)Electrical Low-Pressure Impactor (ELPI)Condensation Particle Counter (CPC)Thermodesorber (TD)
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Particle Number vs. MassPortable PM mass measurement is still not available (except for RAVEM)Europe has taken the approach of setting a number-based standard Swiss-based VERTU.S. is still hoping to have an on-board measurement of mass ready for the 2007 manufacturer in-use testsThis subject remains under discussion and evaluation
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Heavy-Duty OBDCARB has adopted a rule for heavy-duty OBD to take effect in 2010Diesel engine monitors:Fuel systemFuel pressure controlFuel injection quantityFuel injection timingClosed loop system functionMisfire2010-2012 identify continuous misfire at idle2013 identify any misfire causing 1.5 x standard increase
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Heavy-Duty OBDDiesel engine monitorsEGR systemDetect faults in the flow rate, response rate, and cooling system performance before 1.5 x emissions increaseMonitor closed loop system functionBoost pressure controlDetect faults before 1.5 x emissions increaseUnder and over boost malfunctionsSlow responseCharge air undercoolingMonitor closed loop system function
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Heavy Duty OBDDiesel engine emission control technology monitors:Hydrocarbon catalystNOx catalyst (SCR)NOx adsorberPM filterAdditional monitors:Exhaust gas sensors, variable valve timing systemCooling system; PCV systemElectronic components
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
Diesel Emission Testing - SummaryTesting using an engine dynamometer is the most accurate but very expensive and cumbersomeUsing a heavy-duty chassis dyno requires a large capital investment, and cannot accommodate most non-road equipmentCurrent and proposed regulations aim to provide complete control across all applications and the entire operating cyclePEMS are under development but appear not to approach the accuracy and repeatability of engine test benches
2005 Northeast States for Coordinated Air Use Management (NESCAUM)
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