P. 1 

# OAR Box 1830 Prepped byOllie Stewart



### Document

Number: 

# 21 ) IV-B-17 Docket Number: 

# A-87-1 1

Printed 11/13/20087:20:52 AM Sheet 21 of 232P. 2

UISOSB, ^

\ PHO& UNITE D STATE S ENVIRONMENTA LPROTECTIO N AGENC Y AN N ARBOR
. MICHIGA N 4810 5 

## FE B 16198 9 MEMORANDU

M SUBJECT :

FROM ; TO : & OFFIC E O F AI R AN D RADIATIO N
Evaporative an

d Tailpip ^ ^E.ips^sio n 198 7 Oldsmobil e Cutlas s Ci^r'a^
- St o 198 7 MY Procedur e an§ v Supplementa l NPR

M System s s Measurements , ock Vehicl e Using Modifie d Vehicl e Using Procedur e for Non-integrate d
Pete r Hutchins , Mechanica l Enginee r Standard s Developmen t an d Suppor t Branc h Docke t A87-1 1 Backgroun

d The tes t vehicl e wa s a privatel yowned vehicl e previousl y tested a t AT L unde r a n EP Afunded runnin

g los s tes t program . The tes t result s obtaine d a t AT L indicate d tha t running losse s fro mthi s vehicl e wer e low . Thes e result s suggeste d tha t the vehicl e design ma yhave employe d a relativel yhig hrat e o f caniste r purge . EP Awas , therefore , desirou s o f determining the evaporative an d tailpip e emission s o f th e subjec t vehicl e whe n equippe d wit ha large r caniste r an d tested b

ythe procedur e for non-integrate d system s a s containe d in th e supplementa l NPRM . Vehicle . The descriptio n o f th e tes t vehicle , bot hstoc k an d modified , i s show

n i n Tabl e 1 . Installatio n o f the 3. 7 lite r caniste r wa s accomplishe d b ydisconnecting th e purg e contro l solenoi d fro

mth e stock caniste r an d connecting t o the larg e canister . Testing Al l testing wa s performe d using 9 RV P fue l a s employe d i n certificatio n testing .P. 3 

### r ~ -2
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a . Stoc k vehicle . On e tes t sequenc e for diurnal , tailpip e an

d ho t soa

k emission s following 198 7 mode l yea r procedures . Prio r t o performanc e o f th e tes t sequence , the vehicl e fue l system , an d evap . syste

m u p t o th e canister , wa s lea k checked . b . Modifie d vehicle . Thre e tes t sequence s fo r diurnal , tailpip e an

d ho t soa

k emission s following th e supplementa l NPR

Mprocedur e for non-integrate d systems . Briefly , th e supplementa l NPR Mtes t procedur e step s ar e a s follows ; (a ) Tan k drai n an

d j vehicl e temperatur e stabiliz e a t 68 ° t o 86°F , (b ) Loa d caniste r t o breakthroughusing 60 ° t o 84° F hea t builds , (c ) Fue l an d perfor

mprep LA-4 , (d ) Soa k a t 68 ° t o 86°F , (e ) Fue l an d perfor

m60 ° t o 84° F hea t build , (f ) Measur e tailpip e emissions , (g ) Measur e ho t soa

k emissions , including ga s ca p removal , (h ) Fuel , perfor

mfirs t 72 ° t o 96° F hea t build , drai n ! tank , (i ) Soak a t 68° " t o 86°F , (j ) Measur e diurna l emission s during secon d 72 ° t o 96° F hea t build . Fue l tan

k ca p remova l a t the star t o f the ho t soak s wa s omitted becaus e o f lack o f a n acces s por t in th e SHED . For thes e test s a 3. 7 lite r caniste r (se e Tabl e 1 for description ) wa s substitute d fo r th e stoc k canister . During testing , a problemwa s encountere d i n th e caniste r load-to-breakthroughstep o f the revised procedure . The rat e a t whic hH

C vapo r wa s generate d in th e fue l tan

k during hea t build s wa s to o lo wt o allowusag e o f the breakthrough definitio n o f thre e time s ris e in SHE D concentratio n i n on e minut e [o

r less . Breakthroughloading wa s terminate d onc e i t wa s determine d tha t HC entering th e SHE D gave a clea r indictio n tha t the caniste r wa s loaded a t leas t t o breakthrougha s i s require d b

yth e procedure . Tes t Result s The measure d diurnal , tailpip e an d ho t soa

k emission s ar e show n in Tabl e 2 . Table s 3 an d 4 contai n caniste r weigh t data . In th e baselin e tes t (stock vehicle) , th e vehicl e complie d wit hthe evaporativ e an d tailpip e emissio n standards . The measur e emission s wer e 0.2 5 g/mil e HC , 3.0 7 g/mil e CO , 0.5 6 g/mil e !NO

xan d 0.4 8 g evaporativ e HC . The measure d fue l econom ywa s 18. 8 mpg . In th e modifie d configuratio n (3. 7 lite r caniste r replacing th

e stock canister ) th e vehicl e als o complie d wit h tailpip e emissio n standards . The average s o f the measure d tailpip e emission s wer e 0.2 2 g/mil e HC , 2.0 8 g/mil e C O an d 0.5 1 g/mil e NOx . The vehicl e di d no t compl ywit hth e evaporativ e standard usin

g eithe r curren t or revised tes t procedures . TheP. 4
-3
- average s o f th e diurna l emission s wer e 10.64 g and 7.82 g a s woul d b e measure d unde r curren t and revise d procedure s respectively . Th e highemissio n rate s sho wtha t insufficien t caniste r purg e occurre d durin g th e drive s t o allo wfo r H C collectio n durin g th e subsequen t hea t builds . A s configured , th e vehicl e purg e syste mdi d no t provid e sufficien t purg e fo r th e larg e canister . Th e averag e measure d fue l econom ywa s 19. 1 mpg .
Attachment s 6527 WP. 5 Tabl e 1 Tes t Vehicl e Descriptio n Year , Make , Model :

VIN : Engine : Transmission : Mileage : Engin e Family : ; Evap . Family : Fue l Tank Capacity : Productio n Caniste r Par t No. : Productio n Caniste r Size : Modifie d Canister : Construction :

Size : Activate d Carbon : Purg e System : 1987 , Oldsmobile , Cutlas s

Cier a 1G3AJ1131H03661 7 3. 8 lite r Automati c Approximatel y25,00 0 mile s H2G3.8V8XEB 7 7BO-2 D 15. 8 gal . 1708593 5 -1. 4 lite r Mad e fro

mstoc k G

Mcaniste r (par t no . 17085935 ) b y sectioning an

d elongatin g bod yo f canister . Stoc k fue l tank connection , purg e contro l an

d purg e ai r entry retained . -3. 7 lite r G Mtyp e Stoc k vehicl e purg e system .Baselin e Tes tEven tTes tProcedur e Fue l Emissions * Econom y H C C

O NO

xMP

G
Hea tBuil d (Baselin e Diurnal ) 0.2 3 Ja g 1 1.0 6 13.6 8 0.9 7 18. 6 Ja g 2 0.0 2 0.0 3 0.4 1 17. 6 Ja g 3 0.0 7 0.8 4 0.5 4 22. 2 lomposit e Tailpip e 0.2 5 3.0 7 0.5 6 18.8 4 lo tSoa k

0.2 5 lea tBuil d Hig h Temperature ) ———— lea tBuil d Hig h Temperature . ——— iupplementa l NPRM liurnal )

Gram s fo revaporativ e emissions ; g/mil e fo r * Ca p remova l sequenc e no tperformed
. labi e 2 Emission s an d Fue l 198 7 Oldsmobil e Cutlas s Cier a

Emissio n (qram s fo revaporativ e

H C Tes ti Test 2 15.5 1 6.0 6 1.1 6 0.7 6 0.0 2 0.0 2 0.0 6 0.0 8 0.2 7 0.1 9 0.39* * 1.05* * 9.3 0 5.2 0 8.6 1 6.4 5 .. . . Test 3 Tes t1
8.3 4 0.8 0 10.6 1 0.0 2 0.0 1 0.1 0 0.8 1 0.2 0 2.4 3 0.57* *
6.2 2
6.4 0

tailpip e emissions . Economy . (1G3AJ1131H036617 ) Supplementa l NPRM Tes tProcedur e (3. 7 1 Caniste rreplacin q stoc k canister ) emissions : a/mil e fo rtailpip e emissions ) C O NO x Tes t2 Tes t3 Tes t1 Tes t2 Tes t3

— 8.1 4 7.3 1 1.0 3 1.0 5 0.8 4 0.0 2 0.1 5 0.4 2 0.3 9 0.2 3 0.9 1 1.0 3 0.5 5 0.5 0 0.3 4 1.9 5 1.8 7 0.5 8 0.5 5 0.3 9

_ _

—

— Tes ti

— 18. 9 17. 7 22. 0 18.9 6

—

—

— •t

Fue l Econom y MP G Tes t2 Tes t3

— 19. 1 19. 3 18. 1 17. 6 22. 7 22. 2 19.3 8 19.0 5

—

——

— •

-Tabl e 3 Caniste r Loadin g Usin g Hea t Build s (3. 7 lite r Canister ) Caniste r Weigh t an d Weigh t Change , H C Fro mCaniste r t o SHED , Tota l H C Generate d i n Fue l Tan k

Firs t test ; Firs t hea t build "

Second hea t buil d Thir d hea t buil d (3/ 4 hour ) Second test ; Firs t hea t buil d

Second hea t buil d Thir d test ; Firs t hea t buil d

Secon d hea t buil d Thir d hea t buil d (1/ 2 hour ) Initia l Caniste r Weigh t (g ) 2131.9" " 2179. 4 2221. 2 2233. 6 2260. 6 2263. 2 2289. 4 2305. 0 Fina l Caniste r Weigh t (g ) 2179. 4 2221. 2 2244. 4 2260. 6 2285. 5 2289. 4 2305. 0 2300. 1 H C

by Collecte d H C Collecte d Caniste r (g ) i n SHE D (g ) 47.5 " 0.1 0 41. 8 0.2 4 23. 3 0.2 1 27. 0 7.1 3 24. 9 8.4 1 26. 2 5.0 0 15. 6 9.6 7 -4. 9 2.8 2 Tota l H C generate d (g ) 47.6 0 42.0 4 23.4 1 34.1 3 33.3 1 31.2 0 25.2 7 -2.0 8____ , Tabl e 4 Caniste r Weight s During Tes t Sequenc e

(3. 7 L Canister )

Caniste r Weigh t (g ) Weighing Tes t 1 Tes t 2 Tes t 3 Afte r BreakthroughLoading 2244. 4 2285. 5 2300. 1 Afte r Prep . LA- 4 2186. 5 Afte r Col d Soak —- - 2236. 9 After'hea t buil d (60°-84°F ) 2205. 0 Afte r tailpip e tes t and; 1 hou r ho t soak —2201. 9 2215. 4 Afte r # 1 hightemp . hea t buil d (72°-96°F ) .2202. 8 2237. 1 2250. 4 Afte r # 2 hightemp . hea t buil d (72°-96°F ) 2233. 6 2263. 2 2269.9 *

* Caniste r weigh t following overnigh t soak prio r t o # 2 high temperatur e hea t buil d o f thir d tes t wa s 2237. 2 g .