P. 1 

# OAR Box 1147 Prepped by Ollie Stewart



## Document

Number: 

# 159 ) IV-E-3

2 Docket Number: 

# A-87-1 1

Printed 4/22/2008 2:42:56

PM Sheet 159 of 242^ €B8r "* . P. 2
UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y AN N ARBOR . MICHIGA N 4810 5 

# 0-87~: U -pp-5-3^ -

OFFIC E O F AI R AN D RADIATIO N 

## MA R 

## 3 | 198 8
MEMORANDU M SUBJECT : API/DoT/EP AMeetin g Regardin g Onboar d Vapo r Recover y FROM : 

### TO : THRU : Glen n W . Passavant , Senio r P

Standard s Developmen t an d Supp o Publi c Docke t A-87-1 1 Cheste r J . France , Chi e Standard s Developmen t rojec t Manager^^ ^fcu*** ^ ppor t Branc h ^ ^ «-**•»" •
t/ta-e^rich " O n Februar y9 , 198 8 a meetin g wa s hel d betwee n API , DoT , an d EP Arepresentative s a t DoT/NHTS Aheadquarter s i n Washington , D.C . A n attendee s lis t i s attached . Th e purpos e o f th e meetin g wa s t o provid e AP I representative s a n opportunit yt o presen t th e result s o f ne w wor k the yha d don e i n developin g onboar d contro l system s fo r passenge r cars . Th e materia l presente d a t th e meetin g i s summarize d i n th e attache d handout . I n addition , AP I summarize d th e result s o f th e Failur e Mode s an d Effect s Analyse s (FMEA ) the yha d recentl y complete d fo r evaporativ e an d onboar d contro l systems . Accordin g t o API , th e potentia l failur e an d consequence s o f suc h failure s fo r evaporativ e an d refuelin g system s wa s abou t th e same . Further , AP I state d tha t i n th e overal l sens e thei r onboar d syste mwa s a t leas t a s saf e a s evaporativ e system s an d provide d th e potentia l fo r safet yimprovement s i n a t leas t fou r areas : remova l o f th e externa l ven t line , increas e i n caniste r size , depressurizatio n o f fue l tanks , an d shorte r vapo r line s t o th e rear-mounte d canister . AP I agree d t o provid e NHTS Aa cop yo f thei r FME Awhe n i t i s submitte d officiall yt o EP Aa s commen t o n th e NPRM . Attachment sP. 3



### Attendee s Lis t API/NHTSA/EPAMeeting Februar y9 , 198 8 Onboar d Vapo r Recovery Name Affiliatio n Glenn Passavan t EP A Mar c Himmelstei n AP I E.P . Crocket t AP I Hugh Shanno n Exxo n W.J . Koeh l MOBI L T.C . DeLoac h MOBI L J.J . Li u NHTS A Scot t B . Yor k NHTS A Joh n Womac k NHTS A Ro n McMilla n FHWA/OMC S R . Hellmut h NHTS A

## ONBOAR D CONTRO L O F REFUELIN G EMISSION S EXXO N RESEARC H AN D ENGINEERIN G COMPANY

FEBRUAR Y9 , 198 8

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# TH E DESIG N FEATURE S ARE :

•PRODUCTIO N FILLPIP E •PRODUCTIO N VEN TLIN E PLUGGE D •LO U PRESSUR E DESIG N O F CANISTE R AN D VAPO R LIN E T O CANISTE R THES E FEATURE S MEAN THAT : •FUE L FLOWIN G DOW N TH E FILLPIP E ACT S A S TH E SEA L •N O MECHANICA L O R LIQUI D TRA P TYP E SEA L NECESSARY •N O SPITBAC KA TFLO WRATE S U P TO 10. 8 GP M

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# PRINCIPA L ELEMENT S O F ENHANCE D ON-BOAR D SYSTE M

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Emissions

o EZ l ProductIon

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# PODGE 60 0 REFUELIN GEMISSIONS 

# M L BAS E VEHICL E ONBOARD VEHICL E % CONTRO L 

# 9. 0 PS I 5.6 5 G/GA

L 0.0 4 G/GA

L 99.3 % 10. 5 PS I

6.6 4 G/GA

L 0.0 4 G/GA

L 99.3 % 12. 0 PS I

7.8 9 G/GA

L 0.0 9 G/GAL 98.8 %

T l C O

# CONCLUSION S

e 98+ % CONTRO L O F REFUELIN G EMISSION S UIT H A N11. 8 RV P FUE L CA

M B E OBTAINE D UITHOU T AVAPO RSEAL . e N O EFFEC T O NOPERATIO NO F ANAUTOMATI C DISPENSIN G NOZZL E e N O SPITBAC K WA S OBSERVED . e CONTRO L O F EVAPORATIO NEMISSION S WA S IMPROVED . e BOT H VEHICLE S ME T TAILPIP E REGULATE D EMISSIO NSTANDARD S O NAN11. 8 RV P FUEL . TH E ONBOAR D CANISTE R CA NB E PURGE D FASTE RTHA

NNECESSAR Y T O RESTOR E IT S CAPACITY .

T l O

# ONBOAR D CONTRO L O F REFUELINGEMISSION S

INVESTIGATION

O F MINIMU

M HOS E SIZ E REQUIRE D

# CANISTE R PESIG N PARAMETE R STUP Y

EXPERIMENTA L DESIG N

- PRODUCTIO N 198 7 BUIC K LESABR E + EVAPORATIV E CONTRO L SYSTE M (ECS ) INCLUDES : SEPARAT E 1/2 " FUE L TAN KVEN T 0.057 " ORIFIC E BETWEE N TAN KAN D CANISTE R

- PARAMETER S VARIE D + VEN THOS E DIAMETER/LENGT H + CANISTE R SIZE/LOCATIO N

- PARAMETER S NO TCHANGE D + ELECTRONI C CONTRO L MODUL E + CANISTE R PURG E RATE S

- N O SEA L APPROAC H

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### RESULT S (CONTINUED )



# Ste pNo , Caniste r Ven t Hos e Sit e Qihe n In . I D Averag e 

# Fue l Rat e gp m 

# Refuelin g Emission s 6ra«s/fia 1 %

Contro l 8 ER E 3.5 L 3/8 " burp

ER E 3.5 L 1/2 ' 1 0 0.1 9 96 % 1 0 ER E 3.5 L 3/8 " Hove d caniste r t o trunk 9. 5 0.0 6 99 % 1 1 ER E 3.5 L 3/8 ' 9. 6 0.0 5 99 % 1 2 ER E 3.5 L 5/16 ' 9. 5 0.0 4 99 % 1 3 ER E 3.5 L 1/4 ' 9. 3 0.0 6 99 %

### RESULT S O F CANISTE RDESIG N STUD Y PARAMETE R 

# VARIE P PERCEN T REFUELING 

# EMISSION S CONTROUE D IPJUENI L Standard caniste r (G N 11 ) 

### 0 - 8 2 • N o refuelin g enlsslon s controlle d wit hproductio nsyste n
• Fue l flow

restrictio nexperience d wit hsmal l ven t hos e

- 30-60 % fil l rat e

- "burp-back " o f fue l
• Enlarge dven t hos e improve s refuelin g contro l dlanete r Enlarge dcaniste r (ER E 3.51 , standar dlocation ) 9 0 - 9 8 • Enlarge dven t hos e dlante r Improve s fil l an

deaission s captur e Enlarge dcaniste r (ERE 3.5£ , trun k location ) 99 + • Achieve dwit h2f t o f 1/ 4 inchhos e

## PURG E

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SCREE N SCREE N OPENIN

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SCREEN OPENIN G INLET OUTLE T

# CONCLUSION S

1/2 " HOS E FRO M TH E TAN KT O ONBOAR D CANISTE R I S SUFFICIEN TI F TH E ONBOAR D CANISTE R I S LOCATE D I N TH E ENGIN E COMPARTMENT

• 1/4 " HOS E FROM TH E TAN KT O ONBOAR D CANISTE R I S SUFFICIEN TI F TH E ONBOAR D CANISTE R I S LOCATE D I N TH E TRUN K NOTE : TH E PRODUCTIO N TAN KVEN TI S 1/2 " 

# FUTUR E WOR K • DETERMIN E REGUUTE D EMISSION S WIT H CANISTE R I N TH E TRUN K

• DETERMIN E CANISTE R PURG E CHARACTERISTIC S

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