6th WLTP Technical Detail OBD / Off Cycle 30 April , 2003 JAMA - - PowerPoint PPT Presentation

6th WLTP Technical Detail

30 April , 2003 JAMA OBD / Off Cycle

OCE Informal Document No. 21 Ninth Plenary Meeting of the Working Group On Off-Cycle Emissions 11&12 January 2005 Palais des Nations, Geneva

OBD : Cause of Emission Deterioration and Detection methodology in Japan

Cause Incident in Development phase Incident in Production phase Bad Maintenance Tampering Abusing Breakdown Detection Certification test（incl.Durability） Surveillance Factory Sampling-test 、Surveillance Inspection & Maintenance、Street check Street check、OBD Inspection & Maintenance 、OBD OBD ・Objective of OBD is to detect high-emitter. ・OBD Threshold should be “Fixed value” or “Additional value”.

OBD-1

Requirement High Emitter

OBD Threshold

Normal

・Breakdown ・Tampering ・Abusing ・Bad Maintenance Incident in Development and Production I&M Surveillance（To be introduced）

Certification Test Factory Sampling Test

Emission Mileage or Year

Street check

: Detection

OBD

OBD-2

Production Requirement (Warranty)

OBD : Cause of Emission Deterioration and Detection methodology in Japan

Off-cycle Condition

Along the Road Multiplied by traffic flow Middle City* data Major City** data

Goal of Off-cycle

• Prevent vehicle emission deterioration under driving

conditions outside of the test mode

• Reflect “Engine Design Rule”

Procedure for Temperature and Altitude range

Accuracy Easiness to gather data Altitude Temperature Easy Estimation Real World Difficult Impossible

No weather Bureau

Possible

Methodologies of Gathering data

*) Middle city(671) Population>about 20K, **)Major city(32): Population>300K

Off-cycle-1

Off-cycle Condition in Japan

Reference Temperature: Data base”Rika Nenpyo” Issued by National Astronomical observatory of Japan(2002) Altitude: Japan Map ; shobunsya Population: Data base;Japan Association of City Mayors (2000)http://www.mayors.or.jp/info/jinkou/1999.03/data-index4.html

Impractical to fulfill all the region, and costly to comply with these requirements Practical to cover more than 90% of the region.

Item Population Number of City 90%tile 100% 90%tile 100% Max Temp. 32.9°C 33.0°C 32.4°C 33.0°C Min Temp.

• 2.0°C
• 12.6°C
• 3.5°C
• 12.6°C

Altitude 100m 1600m 400m 1600m

Altitude(meter)

Altitude Distribution

Population (million) Number of City (x 10)

～20 30 40 50 100 200 300 400 500 1000 Over 1000

100% 0% 50% 10 20 30 40

Covered Area

Population:100M City： 671

Cumulative Population Cumulative Nr. of City Population

• Nr. of City

90%

Lowest Temperature

• 12
• 8
• 6
• 4
• 2

2 4 14

Sapporo Asahikawa Sendai Akita Kyoto Kumamoto Gifu Nara Hiroshima Kobe Utsunomiya Niigata Yokohama Kanazawa Toyama Nagoya Shizuoka Ooita

Lowest Monthly Average of Daily Lowest Temperature ( degrees C)

100% 0% 50%

日最高温度の月別平均値の最高温度（℃） Kochi Okayama Nagano Takamatsu Oosaka Kagoshima Matsuyama Hamamatsu Tokyo Naha Miyazaki Nagasaki Fukuoka Wakayama

Covered Area

Population:34M City：32(Population ＞300,000)

Cumulative Population

• Nr. of City

26 27 28 29 30 31 32 33 34

Sapporo Asahikawa Sendai Akita Oosaka Kyoto Kumamoto Gifu Nara Nagoya Hiroshima Okayama Wakayama Kagoshima Kobe Takamatsu Matsuyama Kochi Fukuoka Utsunomiya Niigata Yokohama Kanazawa Toyama Nagano Shizuoka Hamamatsu Tokyo Ooita Naha Nagasaki Miyazaki

Highest Monthly Average of Daily Highest Temperature (degrees C)

100% 0% 50%

日最高温度の月別平均値の最高温度（℃）

Highest Temperature

Covered Area

Population:34M City：32(Population ＞300,000)

Cumulative Population

• Nr. of City

Remaining Issue

• Off-cycle

Goal of Off-cycle Procedure for Temperature, Altitude

• Common Database (Emission Cross Comparison)

Data submit to DC by end of June Data Analysis by DC