OCE Informal Document No. 21 Ninth Plenary Meeting of the Working Group On Off-Cycle Emissions 11&12 January 2005 Palais des Nations, Geneva 6th WLTP Technical Detail OBD / Off Cycle 30 April , 2003 JAMA
OBD : Cause of Emission Deterioration and Detection methodology in Japan Detection Cause Certification test （ incl.Durability ） Incident in Development phase Surveillance Factory Sampling-test 、 Surveillance Incident in Production phase Inspection & Maintenance 、 Street check Bad Maintenance Street check 、 OBD Tampering Inspection & Maintenance 、 OBD Abusing OBD Breakdown ・ Objective of OBD is to detect high-emitter. ・ OBD Threshold should be “Fixed value” or “Additional value”. OBD-1
OBD : Cause of Emission Deterioration and Detection methodology in Japan : Detection Street check ・ Breakdown ・ Abusing ・ Tampering ・ Bad Maintenance OBD Threshold High Incident I&M Emitter in Development OBD and Production Requirement Surveillance （ To be introduced ） Normal Emission Certification Test Factory Sampling Test Requirement Production Mileage or Year (Warranty) OBD-2
Off-cycle Condition 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 Methodologies of Easiness to gather data Accuracy Gathering data Altitude Temperature Along the Road Real World Difficult Multiplied by traffic flow Impossible No weather Middle City* data Bureau Major City** data Possible Estimation Easy *) Middle city(671) Population>about 20K, **)Major city(32): Population>300K
Off-cycle Condition in Japan 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% 32.9 ° C 33.0 ° C 32.4 ° C 33.0 ° C Max Temp. -2.0 ° C -12.6 ° C -3.5 ° C -12.6 ° C Min Temp. Altitude 100m 1600m 400m 1600m 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 Off-cycle-1
Altitude Distribution 100% 40 90% Covered Area Population:100M Cumulative Population Population (million) Number of City (x 10) City ： 671 30 Population 20 50% Cumulative Nr. of City Nr. of City 10 0 0% ～ 20 30 40 50 100 200 300 400 500 1000 Over 1000 Altitude(meter)
Lowest Temperature Covered Area Population:34M City ： 32(Population ＞ 300,000) 100% Nagano Sapporo Asahikawa Utsunomiya Cumulative Population Akita Sendai Toyama Nara Nr. of City Niigata Gifu Nagoya Kanazawa Kumamoto Okayama Kyoto 50% Takamatsu Kochi Shizuoka Hiroshima Yokohama Kobe Ooita Matsuyama Tokyo Hamamatsu Wakayama Oosaka Miyazaki Fukuoka Nagasaki Kagoshima Naha 0% -8 -6 -4 -2 0 2 4 14 -12 Lowest Monthly Average of Daily Lowest Temperature ( degrees C) 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) 100% Oosaka Kyoto Kumamoto Gifu Nara Nagoya Nr. of City Hiroshima Okayama Wakayama Kagoshima Kobe Takamatsu Cumulative Population Matsuyama Kochi Fukuoka 50% Miyazaki Naha Nagasaki Tokyo Ooita Hamamatsu Shizuoka Nagano Toyama Akita Kanazawa Asahikawa Sendai Yokohama Sapporo Niigata Utsunomiya 0% 27 28 29 30 31 32 33 34 26 Highest Monthly Average of Daily Highest Temperature (degrees C) 日最高温度の月別平均値の最高温度（℃）
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
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