RDE Working group Brussels, September 2015 Collection of NO x emissions data - First preliminary...

RDE Working groupBrussels, September 2015

Collection of NOx emissions data - First preliminary results

RDE working group

14 September 2015

European Commission - Joint Research Centre (JRC)IET - Institute for Energy and Transport

1


Overview

2

• Objective and current status

• Test vehicles and test routes

• Preliminary results

Technology independent

Technology dependent

• Conclusions

RDE Working groupBrussels, September 2015 3

Overview

• Objective and current status





• Conclusions


• RDE Conformity Factors (CF) to be introduced in two phases

• First phase intends to account for NOx emission levels of current Euro 6 diesel cars equipped with state-of-the-art after-treatment technologies

• JRC collected NOx emissions data obtained by stakeholders from existing PEMS tests

Objective


• JRC has received feedback from five RDE stakeholders and Emissions Analytics Ltd.

• JRC re-analysed own tests conducted for the development of the RDE data evaluation

• Data set comprises 36 diesel vehicles and 234 individual trips

• Data analysis started in September 2015

• First preliminary results available

Current Status


Overview

6

• Objectives and current status





• Conclusions


Total number of trips with Euro 6 (NEDC tests ≤80 mg/km) Diesel vehicles 234

After-treatment technologiesSCR only De-NOx only De-NOx+SCR EGR only No information available

996034635

Engine rated power [kW]75-100 100-125 125-150 >150 (max 180) No information available

315247725

Model year

pre 2012 post 2012 No information available

11089 (3 post 2014)35

Mileage at test start [km]

≤20,000 km >20,000 km No information available

72127 (3 >100,000 km)35

Test vehicles


Total number of trips with Euro 6 Diesel vehicles 234

Test routesU+R+M (trips with all U/R/M portions driven) RDE-like (U: 29÷44%, R: 23÷43%, M: 23÷43%, U/R/M distances >16km each) RDE-compliant (RDE-like + compliance with 95th perc.tile v*apos, RPA, <1000m/km)

127

39

22Positive elevation gain of RDE-like tests [m/km]

≤1000 >1000 No information available

3216

Max altitude during RDE-like tests [m above sea level]≤700 700-1000 >1000 No information available

31701

Test routes

All tests performed within moderate Tamb boundary conditions


Overview

9






• Conclusions


EGR only tests(tests with EGR only vehicles)

All tests

10

U+R+M tests(trips with all U/R/M shares driven)

RDE-like tests(U:29÷44%, R:23÷43%, M:23÷43%,

U/R/M distances >16km each)

RDE-compliant tests(=RDE-like + compliance with 95th perc.tile v*apos, RPA, <1000m/km)

SCR & SCR+De-NOx tests(tests with SCR+de-NOx vehicles)

De-NOx tests(tests with de-NOx vehicles)

Technology independent (4 cases) Technology dependent (12 cases)

Preliminary results

Cold start and DPF regenerations uniformly excluded

Test-average NOx emissions, unprocessed (w/o MAW or power binning)


Overview

11






• Conclusions


Vehicle ID Number of tests per vehicle

01 502 403 804 3005 3006 2907 1808 2109 1010 311 3012 613 614 415 416 317 418-36 1Total 234


• All tests (1/3)


• 234 tests from 36 diesel Euro6 vehicles

• Several vehicles represented by only one test (see previous slide)

• NOx emissions ranged roughly from 30mg/km to 700mg/km

• A single test exceeded the 800mg/km of NOx due to aggressive driving

• 5 tests (2% of the total) had CF≤1

• 41 tests (roughly 18% of the total) had CF≤2


• All tests (2/3)


• Error bars represent the maximum and minimum emissions per vehicle

• Significant deviations can be mainly attributed to different driving styles


• All tests (3/3)

Vehicles



• U+R+M tests (1/3)


01 502,14,15,17 403,05 804,06 707 1608 1709,12,13 610,16 311 1018-22,33-36 1Total 127




• 127 tests from 26 vehicles

• A maximum of 800 mg NOx/km was observed

• 4 tests (about 3% of the total) had CF≤1




• A noticeable decrease of the average emissions and max/min deviations, per vehicle, was observed when comparing U+R+M trips with all tests for vehicles 11,08,05,04



Vehicles



• RDE-like tests (1/3)


01 502 403 604 205 406 107 208 210 313 315-16 118-22 1Total 39





• Several vehicles represented by only one test (see previous slide)

• A maximum of roughly 700 mg NOx/km was observed





• A noticeable decrease of the average emissions per vehicle was observed when comparing U+R+M tests to RDE-like tests (e.g. vehicles 15,16,8,3)



Vehicles



• RDE-compliant tests (1/3)

• RDE-compliant tests: U: 29÷44% R: 23÷43% M: 23÷43% U/R/M distances 16km 95th perc.tile v*apos and

RPA within permissible tolerances for each U/R/M trip portions

Elevation gain <1000m/km


01,02 303 105 406 107 213,15,16 118-22 1Total 22







• Tests performed within moderate Tamb boundary conditions


• 1 test (about 5% of the total) had CF≤1




• A decrease in max/min emissions deviations were observed, e.g. vehicles 2,15



Vehicles


Overview

24






• Conclusions



• SCR and DeNOx+SCR vehicles:

U+R+M tripsRDE-compliant trips

• DeNOx vehicles:

U+R+M tripsRDE-compliant trips


SCR and DeNOx+SCR


• U+R+M tests: trips with all U/R/M

shares driven


02,14 404 707 1610 311 1012,13 618,20-22 1Total 60


SCR and DeNOx+SCR



• A maximum of about 700 mg NOx/km was observed

• A minimum of roughly 80mg/km was measured among the available tests




• A minimum max/min variation of about 30mg/km was observed for vehicle 14

SCR and DeNOx+SCR


Vehicles


SCR and DeNOx+SCR






02 307 213,18 120-22 1Total 10


SCR and DeNOx+SCR




• 3 tests (i.e. 30% of the total) had CF≤2


• No DeNOx+SCR tests found to be “RDE-like”



SCR and DeNOx+SCR

• RDE compliant tests (3/3)

Vehicles


DeNOx


• U+R+M tests: trips with all U/R/M

shares driven


03 805 808 1719 1Total 34


DeNOx









DeNOx


Vehicles


DeNOx






03 105 419 1Total 6


SCR and DeNOx+SCR



• More data are needed





• More data are needed

DeNOx

• RDE compliant tests (3/3)

Vehicles


• Euro 6 diesel vehicles can already today reach the Euro 6 NOx emissions limit during on-road driving

• NOx emissions scatter over a wide range, independent of the applied after-treatment technology

• Filtering of tests (“U+R+M”, “RDE-like” and “RDE-compliant”) and the exclusion of tests outside the RDE boundary conditions tends to exclude trips of high NOx emissions

• Feedback and suggestion for further analysis is welcome

Conclusions


Contacts

Martin Weiss: [email protected]

Pierre [email protected]

Barouch [email protected]

Theodoros [email protected]

mailto:[email protected]







Conclusions

RDE Working group Brussels, September 2015 Collection of NO x emissions data - First preliminary...

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