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# OAR Box 1147 Prepped by Ollie Stewart



### Document

Number: 

# 137 ) IV-E-1 0 Docket Number: 

# A-87-1 1

Printed 4/22/2008 2:42:55PM

Sheet 137 of 242P. 2

T ^ 0 S % 

# US B V«OI ^ 

### SE P2 8 

### 198 7 UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y AN N ARBOR . MICHIGA N 4810 5 TF"" ' 

## 0-^i'Xt

OFFIC E O F AI R AN D RADIATIO N MEMORANDU

M SUBJECT : EPA/NTS B Meeting Regarding Onboar d Safet y FROM : TO : THRU : Glen

n W . Passavant , Senio r Projec t Manage r Z)i(pt^ uMaA-U-wv^ i Standard s Developmen t an d Suppor t Branc h Publi c Docke t A-87-1 1 Cheste r J . France , Chie f S/si^Sr~+*-^L Standard s Developmen t and/Suppor t Branc h O n Septembe r 2 , 198 7 severa l representative s o f EPA' s Offic e o f Mobil e Source s me t wit h Dr . Merrit t Birk yo f the Nationa l Transportatio n Safet yBoard (NTSB ) t o discus s the potentia l safet yimplication s o f onboard vapo r recover y systems . Acop

yo f th

e agend a followe d a t th e meeting an

d the handout s use d ar e attached . As can b e see n in th e agenda , discussio n a t the meetin g focuse d on the provision s o f th e onboard an

d volatilit yNPRMs , onboar d contro l technolog yand * hardware , an d potentia l safet y issues . EPA' s viewregarding onboar d safet ywa s summarize d an d the potentia l safet ybenefit s o f th e combine d onboard / volatilit ypackage s wer e explained . W e answere d a numbe r o f Dr . Birky' s question s o n thes e topic s an d gave hi mcopie s o f al l ke ysuppor t document s fo r detaile d discussio n o f th e point s raise d during th

e day . Attachment sP. 3

U S EPA/NTS B Meeting

Onboard Vapo r Recover ySystem s Septembe r 2 , 198 7 An n Arbor , MI 1 . Introduction/Overvie w 2 . Descriptio n o f Onboard Contro l Proposa l ° Applicabilit y ° Cos t 0 Standard ° Tes t Procedur e - overview , parameters , stringenc y 0 Volatilit yEffect s ° In-Us e Dispensing Rat e Limit s 3 . Onboard Contro l Technolog y Evaporativ e Syste

m Integrate d Onboard/Evaporativ e System Potentia l Safet yIssue s ° Design Specifi c Issue s

Refueling Operatio n Safet y Rollove r Protectio n FMVS S 30 1 Crashworthines s 0 In-Us e issue s

Non-cras h relate d (tampering , defects , etc ) In-us e crashworthines s Amor e complex syste mcause s a

n unquantifiabl e ris k increas e EPA' s Vie wRegarding Onboard Safet y 0 Overal l ris k in-us e shoul d no t increas e wit h onboard , straightforwar d engineering solution s ar e availabl e t o addres s concern s 0 Safet yimprovement s availabl e a s par t o f onboard/volatilit ypackage s include : Improve d caniste r safet y Reduc e fue l spillag e during refuelin g Safe r ven t locatio n for refuelin g vapo r Lowe r volatilit yfuel s Redesign o f fuel/evaporativ e system s an d component s
°Opportunitie s for Improvement s

Newvehicl e system s Bladde r system sP. 4

Revie wo f Safet yPosition s ° AI A 0 MVM A ° Jagua r ° Nissan ° Toyot a 0 Mazda NHTS A Cente r for Aut o Safet y 7 . Conclusion s ° Eve n i f on e believe s tha t som e unquantifiabl e increas e in ris k i s possible , combine d positiv e safet ybenefit s o f onboar d an

d volatilit ycontrol s shoul d lea d t o a ne t overal l safet yimprovement . ° Leadtime requirement s aside , we ar e basicall yin agreemen t wit h NHTSAan d th e aut o industr

yregarding onboar d contro l syste msafety . N

o technologica l breakthrough s ar e necessar yt o incorporat e onboar d system s safely . 8 . Break/Lab Tour 9 . Stag e I I Control s 10 . Propose d Volatilit yRule s 11 . Fue l Tan

k Bladde r System s

# ©

Caniste r Looclln a l o Drcokthrouq h Drai n Fue l Tan k Soa k Vehicl e lo r 6 Hour s Fue l I n SHE D t o Breakthroug h 

# r Integrate d Syste m Caniste rPwao
. Cycli cDriv e a . Disconnec t Vapo r Lin e l o Caniste r b . Drai n Fue l Tan k c . 40 % Fuelin g d . Reconnec t Vapo r Un e t o Caniste r e . Driv e On e LA- 4 f . On e Hou r Ho t Soa k g . Repea t (e ) an d (I ) Twic e h . Disconnec t Vapo r Lin e t o Caniste r I . Drai n Fue l Tan k | . 40 % Fuelin g k . Reconnec t Vapo r Un e t o Caniste r I . Hea t Buil d (6 0 •2 F Initial , 2 4 + 1 F Rise ) m . Repeat (e) Throug h (I ) Twic e n . Driv e On e LA- 4 Integrate d Syste m Caniste r Purge . Continuou s Driv e a . Disconnec t Vapo r Un e t o Caniste r b . Drai n Fue l Tan k c . 40 % Fuelin g d . Reconnec t Vapo r Lin e t o Caniste r e . Driv e Repeate d LA-4 s Unti l Mileag e Accumulate d = Mileag e Require d fo r Purg e Equivalen t t o Cycli c Drive . Mileag e Accumulatio n Slop s at th e Firs t Idl e Pas t th e Mileag e Requiremen t Non-Integrate d Syste m Canlaic rpyrgg . Cgnilnwpy a Prlv a a . Disconnec t Vapo r Lin e t o Caniste r b . Drai n Fue l Tan k c . 95 % Fueling . d . Reconnec t Vapo r Un e t o Caniste r e . Drive Repeate d LA-4 s Unti l 85 % of Tan k

Volum e I s Consume d

Vehicl e Coo l Dow n Disconnec t Un e t o Caniste r Drai n Fue l Tan k 10 % Fuelin g Soa k Vehicl e 6 t o 2 4 Hour s

Refuelin g Emission s Measuremen t Reconnec t Vapo r Lin e t o Caniste r Fue l t o Automati c Nozzl e Shut-off(85 % Minimu m Fueling ) Restart Fuelin g Followin g An y Prematur e Shul-otf s Withi n 1 5 Second s Figur e CX

X- 1 Refuelin g Tes t Procedur e T J

## Typical Current Evaporativ e Syste

m

PRESSUR E/VACUUM RELIE FCA P EXTERNA

LVEN T LIN E

FLOAT/ROLLOVE

R VALV E / 3/8 " DIA .

8 ' LON G ^ .05 " DIA . LIMITIN

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1 4 GALLO

NFUE LTAN K PURG EVALV E

1 LITE R CARBO N CANISTE R T O PURG

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N POIN TPRESSURE/VACUU M

RELIEFCAP 

## Integrate dEvaporative/Refueling Syste m J-Tub e Sea

l

NOZZL E ACTUATE D ROLLOVER/VEN T VALV E 5/8 " DIA . 8 ' LON G
05 " DIA . LIMITIN G ORIFIC E
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T O PURG E INDUCTIO N POIN T 3 LITER CARBO N CANISTE R

T JINTEGRATE D EVAPORATIVE/REFUELIN G SYSTE M TAN K MOUNTE D VALVE S REA R MOUNTE D CANISTE R J-TUB E SEAL

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T MECHANICAL O R SOLENOI D

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# L ^-J-TUB E SEAL CONTROLLE D LEA

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5 ' LONG PURG E VALV E

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