p. 1 

# OAR Box 1147 Prepped by Ollie Stewart

Document

Number: 

# 205 ) IV-E-79 Docket Number: 

# A-87-1 1

Printed 4/22/20082:42:58PM

Sheet 205of 242P. 2

^ t09 % UNITE D STATE S ENVIRONMENTA L PROTECTIO N AGENC Y AN N ARBOR . MICHIGA N 4810 5
NO V '98 8 OFFIC E O F AI R AN D RADIATIO N

MEMORANDUM SUBJECT : For d Meetin g Wit h the Administrato r FROM : John F . Anderson , Senio r Projec t Manage r

Standard s Developmen t an d Suppor t Branc h TO : Docke t A-87-1 1 //• ^

I n my . mem o o f Octobe r 26 , 198 8 I indicate d tha t For d ha d no t lef t copie s o f it s presentatio n t o th e Administrato r fro m it s meetin g o f Octobe r 24 , 1988 . Subsequen t t o tha t memo , a copyo f th e presentatio n wa s received . Tha t materia l i s attached . Attachmen t 0783 wP. 3

FINDING S . O F TH E EVALUATION O F EVAPORATIV E EMISSION S RUNNINGLOSSE S REFUELINGEMISSION S

OCTOBER , 198 8P. 4

TES T DESCRIPTION S VEHICLE S TESTE D 1 - 198 7 TAURU S LXSEDA N - 3.O L POR T INJECTION 2 - 198 7 F-25 0 PICKU P - 5-O L POR T INJECTION SAME TES T SERIE S FO

RBOT H VEHICLE S TES T PROGRA

M 1 - FUE L TAN

KFIL L QUALIT Y(OE

M AN D "SIMPLE " SYSTEMS )

2 - STATI C ROLLOVE R(OE M AN D "SIMPLE" )

3 - REFUELINGEMISSION S ("SIMPLE " SYSTEM ONLY )

EXHAUST/EVAPORATIVE/RUNNIN GLOS S EMISSION S (OE M AN D "SIMPLE" )P. 5

FOR D POSITION RUNNIN GLOSSE S AN

D EVAPORATIV E EMISSION S AR E A N IMPORTAN T ENVIRONMENTA L CONCER

N

• • 25-30 % O F LOCA L VO C INVENTORIE S

. . REFUELIN G I S APPROXIMATEL Y1 % 2 DIFFEREN T DESIG

N APPROACHE S AR E REQUIRE D T O CONTRO L EITHE R RUNNIN GLOSSE S O

R REFUELINGLOSSE S WE BELIEV E THA T WE COUL D SUCCESSFULL YCONTRO L RUNNIN GLOSSE S WITHOU T SIGNIFICAN T INCREASE D SAFET YCONCERN S I F

• • OBV R CONTROL S AR E NO T REQUIRE D

• • MODES T RV

P LIMIT S AR E IMPOSE D WE BELIEV E THA T CONTRO L O F REFUELINGVAPOR S UNAVOIDABL Y INTRODUCE S SAFET YRISK S THA T AR E NO T ASSOCIATE D WIT H TH E CONTRO L O

F EVAPORATIV E EMISSION S AN D RUNNIN GLOSSE S TH E "SIMPLE " SYSTEM

HA S TH E SAME , I

F NO T GREATER , SAFET Y CONCERN S A S OTHE RPREVIOUSL YREVIEWE D PROTOTYP E REFUELING CONTRO L SYSTEM S TH E "SIMPLE " SYSTEM

GENERATE S A

GREATE RAMOUN T OF VAPOR S A T A FASTE RRAT E UNDER"OZON E DAY " CONDITION SP. 6
TES T PROGRA M FINDING S FUE L TAN KFIL L QUALIT Y TH E "SIMPLE " SYSTE M DI D NO T ACHIEV

E DESIG

N OBJECTIVE S FO

R FILLABILIT Y

- 1 2 GALLON S PE

R MINUT E - CORPORAT E

- 10 GALLON S PE

R MINUT E - AR

B TH E "SIMPLE " SYSTE M FIL L RAT E I S AFFECTE D B Y CHOIC E O

F FILLER NOZZL E HIGH REFUELIN

G VAPO R FLO W RATE S LEA

D T O LIQUI D CONDENSATIO N I N TH E VAPO

R LINES LIQUI D FUE L CA

N ALS O ENTER TH E VEN T LINE S UNDER NON-REFUELIN

G CONDITIONS TH E "SIMPLE " SYSTE M REQUIRE D A

NUMBER O

F RESTART S O

F TH E FILLE R NOZZL E UNDER SOM E CONDITIONS FUE L SPITBAC KWAS NOTE D O N 25 % O F TH E TEST S O

N TH E TRUC K EQUIPPE D WIT H TH E "SIMPLE " SYSTEM -P. 7 TES T PROGRA

M FINDING S

2 - STATI C ROLLOVE

R TH E "SIMPLE " SYSTE M VALV E LEAKE D 2 8 oz - O F FLUI D I N TH E FIRS T 5 MINUTE S O

F TH E TES T COMPARE D TO FMVS S 30 1 LIMI T O F 5 OZ - I

N 5 MINUTES TH E OE M SYSTE M MEET S TH E FMVS S 30 1 STANDARD -TES T PROGRA M FINDINGS

3 - REFUELIN

G EMISSION

S TH E "SIMPLE " SYSTE M EMIT S BURST S O F HYDROCARBO N VAPO R A T EAC H NOZZL E SHUTOF F TH E "SIMPLE " SYSTE M SEA L FORMATIO N

I S INCONSISTEN T A T LO W FIL L RATE SP. 9 TEST PROGRA

M FINDING S

4 - EXHAUST/EVAPORATIVE/RUNNIN G LOS S EMISSION

S TH E "SIMPLE " SYSTE M GENERATE S MOR E HYDROCARBO N VAPO R THA

N TH E PRODUCTIO N

VEHICLE S TH E "SIMPLE " SYSTE M GENERATE S HYDROCARBO N VAPOR S A T A FASTE R RAT E THA

N PRODUCTIO N

VEHICLE S UNDE R "OZON E DAY " CONDITION S TH E HIG H QUANTIT Y O F VAPO R FRO M TH E "SIMPLE " SYSTE M EXCEED S TH E CAPABILIT Y O F TODAY' S EXHAUS T EMISSIO N CONTRO L SYSTEM -

# COMPUTE R PROJECTIO N

TYPICA L OZON E DA

Y FUE L VAPO R GENERATIO N

SIMPL E SYSTB 4 PRODUCTIO

NTRUC K SYSTE M PRODUCTIO

N Cfl R SYSTE M 11. 5 RV P g. o RV P FUEL VOLATILIT

Y

OP.1 1

"SIMPLE " SYSTE

M CONCER N
TH E FLO W RAT E NEEDE D T O PROVID E ACCEPTABL E REFUELIN

G PERFORMANCE RESULT S IN : 1 ) TH E GENERATIO N O F MOR E HYDROCARBON S DURIN G VEHICL E OPERATIO N 2 ) INCREASE D EXHAUS T EMISSION S O N "OZON E DAYS " 3 ) POTENTIA L DRIVEABILIT YCONCERN S A S A RESUL T O F INCREASE D FUE L ENRICHMEN T UNDE R MOR E SEVER E VEHICL E OPERATIN G CONDITION S 4 ) A LARGE R FUE L TAN KVEN T OPENIN G THA T NEED S T O B E SEALE D DURIN G ROLLOVE RP.1 2

PROBABL E DOUBL E DIURNA L EVAPORATIV E EMISSION S PLU S RUNNIN

GLOS S HARDWAR E FO RLIGH T DUT YVEHICLE S
MOR E SOPHISTICATE D ELECTRONI C PURG E CONTRO L FUE L TAN KHEA T SHIELD S AND/ORINCREASE D FUE L SYSTE M COOLING 4 - AND/ORMEASURE S T O REDUC E FUE L SYSTE M HEA T 5 - ENLARGE D CARBON

CANISTE R(APPROXIMATEL Y1- 2 LITERS )
1 ) ASSUME S TH E US E O

F SAFET YVEN T VALVE S WIL L B E PERMITTE D 2 ) ASSUME S MODES T RV

P CONTROL S

TFR10218 8P.1 3

PROBABL E HARDWARE T

O CONTRO L REFUELIN

G VAPO R FO RLIGHT-DUT YVEHICLE S 1 ) ENHANCE D PURG E CONTRO L LIKEL YT O B E SAM E A S REQUIRE D FO RRUNNIN G LOS S CONTRO L 2 ) FILLE RPIP E VENT CONTRO L MODUL E 3 ) NOZZL E SEA

L MECHANIS M 4 ) LIQUID/VAPORSEPARATO R 5 ) OVER-PRESSUR E RELIE F MECHANIS M 6 ) LARGERCARBO

N CANISTER -Tw o SYSTEM S

- ABOU T 3 LITER S FO R9- 0 PS I FUE L 7 ) LARGERDIAMETERVAPO RTUBE S T

O CANISTER
ASSUME S MODES T RV

P CONTROL SP.1 4

FORD POSITION RUNNIN GLOSSE S AN

D EVAPORATIVE EMISSION S AR E A N IMPORTANT ENVIRONMENTAL CONCER

N

- - 25-30 % O F LOCA L VO C INVENTORIE S

• - REFUELIN G I S APPROXIMATEL Y1 % 2 DIFFEREN T DESIG

N APPROACHE S AR E REQUIRE D T O CONTRO L EITHE R RUNNIN GLOSSE S O

R REFUELIN

GLOSSE S WE BELIEV E THAT W

E COUL D SUCCESSFULL YCONTRO L RUNNIN GLOSSE S WITHOU T SIGNIFICAN T INCREASE D SAFET YCONCERN S IF
• - OBV R CONTROLS AR E NOT REQUIRE D

• - MODES T RV

P LIMIT S AR E IMPOSE D WE BELIEV E THAT CONTRO L O F REFUELIN

GVAPOR S UNAVOIDABL Y INTRODUCE S SAFET YRISK S THAT AR E NO T ASSOCIATE D WIT H TH E CONTRO L O

F EVAPORATIVE EMISSION S AN D RUNNIN GLOSSE S TH E "SIMPLE " SYSTEM

HA S TH E SAME , I

F NO T GREATER , SAFET Y CONCERN S A S OTHE RPREVIOUSL YREVIEWE D PROTOTYP E REFUELIN G CONTRO L SYSTEM S TH E "SIMPLE " SYSTEM

GENERATE S A

GREATE RAMOUN T O

F VAPOR S A

T A FASTE RRAT E UNDER"OZONE DAY " CONDITION S