P.1 

OAR Box 1830 

Prepped by Ollie Stewart 

Document Number: 

10)IV-B-6 

Docket Number: 

A-87-11 

Printed 11/13/2008 7:20:51 AM Sheet 10 of 232 
P.2 

^ I 6 !938 

KE?!CR\MDOK 

SUBJECT: Passive OnboorJ Refueling Control Systf!?. resting -

Results Collected To Date 

FROM: 

:0: 

THRU: 

Peter Rutcbins, Mechanical Engineer 

Standards Deveiocront and Support Branch 

Charles L. Gray, Jr. , Director 

L'rvissicn Ccr.tr r.l Technology Division 

John F. Andersen, rer.ier Projec t ttan-ogsr 

Standard." Tjsveiopr.'ir.t and Support Branch 

Chester J. France, Chief 

Standards ?evel oorcer.t en^ Sunnort Branch 

In acne dated June 14, 198$, ST?? requested that 

specified tcctinc b<j v rfcrr-ed by TBP using the "Parcive 

Or.fccarS Refueling; Cor.tre" System." The recuoctec testing vis 

f.'atdi vid?'3 into five rr^;"».?e?:. Phase •est in^ has been 

cor.pletec. One test rep: in? t* h<? performed in phase 1 sno in 

r.-h.^co 2, Ph-?.££ * ^nf" : testin g is hfiin'i initiate.' 5 an'1 should 

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Attachment 1 

Phase 1 • To determine the effects of fuel RVP on the control 

of refueling emissions by the system using a test 

matrix of four refueling rates and three fuel RVPs. 

A four liter canister was employed to assure 

adequate storage capacity. The test results are 

shown below. 

Phase 1 Test Results 

Fueling 

Rate 

(gal/min) 

3 

4 

4 

5 

5 

5 

5 

5 

10 

10 

10 

10 

10 

Dispensed 

Volume 

(gal) 

13.9 

13.7 

14.2 

13.8 

13.3 

14.6 

14.2 

13.9 

12.7 

13.2 

13.1 

13.9 

13.9 

Measured 

RVP 

(psi) 

8.9 

9.0 

8.9 

8.9 

9.2 

10.5 

11.6 

11.3 

9.0 

9.2 

9.0 

10.5 

11.5 

Measured 

Refueling Emissions 

(gram/gal) 

0.02 

0.02 

0.01 

0.02 

0.01 

0.02 

0.02 

0.06 

0.02 

0.02 

0.02 

0.01 

0.00 
P.5 

Attachment 2 

Phase 2. To determine the effect of unplugging the 0.050 inch 

orifice in the sending unit. Vapors from the orifice 

routed to the canister. 

A four liter canister was employed in phase 2 

testing. The results of this testing are shown below. 

Phase 2 Test Results 

Fueling 

Rate 

(gal/min) 

5 

10 

Dispensed 

Volume 

(gal) 

13.6 

13.7 

Measured 

RVP 

(psi) 

9.3 

9.3 

Measured 

Refueling Emissions 

(gram/gal) 

0.01 

0.01 
P.6 

Attachment 3 

Phase 3. To determine the effect of tank positioning during 

refueling on system performance. Four tank 

positions, to simulate refueling on 10° angle, are 

investigated. The positions are as follows: 

Tank Position A: "Vehicle" facing up grade 

' Tank Position B: "Vehicle" across grade, right 

side high 

Tank Position C: "Vehicle" facing down grade 

Tank Position D: "Vehicle" across grade, left 

side high (fuel filler on left 

side of "vehicle"). 

As in the previous test phases, a 4 liter canister 

was employed. The test results are shown below. 

Phase 3 Test Results 

Tank Fueling Dispensed Measured Measured 

Position Rate Volume RVP Refueling Emissions 

(gal/min) (gal) (psi) (gram/gal) 

0.01 

0.05 

0.02 

B 5 11.3 9.0 0.02 

C 5 17.5 9.0 0.00 

C 10 17.2 9.0 0.00 

A 

A 

A 

5 

5 

5 

9 . 1 

7 . 8 

8 . 0 

8 . 9 

9 . 0 

9 . 0 

17 

17 

15 

14 

5 

2 

4 

5 

D 5 15.4 9.0 0.01 

D 10 14.5 9.0 0.01 

0386X