1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the...
-
Upload
allison-parks -
Category
Documents
-
view
212 -
download
0
Transcript of 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the...
![Page 1: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/1.jpg)
1
On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3
Report from the United States 18th Session of Executive Committee AC.3
16 November 2006
Informal document No. WP.29-140-17(140th WP.29, 14-17 November 2006, agenda item II.2.5.12.)
![Page 2: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/2.jpg)
218th Session of AC.3Report on OCE GTR Development
Overview Background on GTR Development Objective of Off-cycle Emission GTR Key Elements of draft GTR
World-wide Not-to-Exceed Prohibition on Defeat Strategies
Current Status and Timeline
![Page 3: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/3.jpg)
318th Session of AC.3Report on OCE GTR Development
Background on GTR Developmento March 2005, AC.3 approved the development of a
Global Technical Regulation for Off-cycle Emissions (OCE) Based on a proposal from the United States under the
1998 Global Agreement “The proposed regulation will be based on the additional
requirements for both type-approval and certification that require adherence to a Not-to-Exceed (NTE) protocol.”
o Informal group of technical experts under GRPE Regular meetings since 2002 Transparent process: meeting notes, presentation
material, and GTR drafts available on OICA web site Regular reports to GRPE on progress
![Page 4: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/4.jpg)
418th Session of AC.3Report on OCE GTR Development
Objectives of the Off-cycle Emissions GTR
Address emissions from on-road heavy-duty engines under conditions which may not be well covered by certification test cycle Includes both ambient conditions as well as
engine operation not covered in WHDC
Ensure that heavy-duty engines are not equipped with defeat strategies Defeat strategies can be components or
software on a vehicle which unreasonably increase emissions under off-cycle conditions
![Page 5: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/5.jpg)
518th Session of AC.3Report on OCE GTR Development
Off-cycle Emission GTR Overview Key elements of draft GTR
Provisions prohibiting the use of defeat strategies World-harmonized Not-to-Exceed (WNTE) “Control
Area” with performance-based emission limits Off-cycle Emission GTR compliments the
WHDC GTR In-use, on-vehicle emissions testing
GTR does not include specifications for in-use vehicle testing or on-vehicle emission measurement equipment
WNTE being developed to allow for testing of compliance during in-use, on the road operation of the engine
Individual countries and regional authorities may specify their own in-use testing requirements to enforce WNTE
![Page 6: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/6.jpg)
618th Session of AC.3Report on OCE GTR Development
World-wide Not-to-Exceed
Engines must meet performance-based numerical emission standards during:Broad range of ambient
conditionsDuring broad area of engine
operation (e.g., engine speed and load)
Over short time durations (as little as 30 seconds)
![Page 7: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/7.jpg)
718th Session of AC.3Report on OCE GTR Development
Example WNTE Control Zone Area
Engine Rotational Speed
En
gin
e T
orq
ue
WNTE Control Area
Engine Torque Curve
![Page 8: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/8.jpg)
818th Session of AC.3Report on OCE GTR Development
Example WNTE Altitude and Temperature Operating Range
-5
0
5
10
15
20
25
30
35
40
0 250 500 750 1,000 1,250 1,500 1,750
Altitude (meters above sea-level)
Tem
per
atu
re (
deg
. C)
WNTE Applies without correction factors
WNTE Does Not Apply
WNTE Applies with opportunity for correction factors forPM and NOx
![Page 9: 1 On-road Heavy-duty Engine Off-cycle Emissions GTR – Status Report for AC.3 Report from the United States 18th Session of Executive Committee AC.3 16.](https://reader035.fdocuments.in/reader035/viewer/2022080914/56649ce45503460f949b07e2/html5/thumbnails/9.jpg)
918th Session of AC.3Report on OCE GTR Development
Current Status
Draft GTR well developed – working on a hand full of remaining issues
On a path for completion within next 18 months
Recent contractor technical report from one Contracting Party evaluates alternative approaches to controlling off-cycle emissions (final report has not been released) If pursued, taking a new path could result in an
additional 2-3 years development GRPE will continue to keep AC.3 appraised
of our progress