Fluorescence-Based Method Designed for Quantitative Measurement of Fuel Film Thickness during Cold-Start of Engines

Abstract

The liquid fuel that accumulates in the engine manifold and cylinders during cold start conditions is thought to contribute significantly to excess hydrocarbon emissions. Two fluorescent dopants, cyclohexanone and 2-methyl-cyclopentanone, have been tested for use as fluorescent markers for quantitative two-dimensional (2D) imaging of the thickness of automotive fuel films in the range 0–1 mm. These dopants are co-evaporative with synthetic automotive fuel and have fluorescence that is virtually independent of oxygen concentration equivalent to saturation under 5 atm air at temperatures of 20–200 °C. Selection, calibration procedures, and (nonengine) demonstration laser-induced-fluorescence (LIF) imaging experiments are discussed.

Keywords

Fluorescence Diagnostics Engines Liquid films Cold start

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References

Lee

B. J.

, J. Air Waste Manage. Assoc. 41, 16 (1991).

Chang

T. Y.

Chock

D. P.

Hammerle

R. H.

Japar

S. M.

and Salmeen

I. T

, Crit. Rev. Environ. Control 22, 27 (1992).

Takeda

Yaegashi

Sekiguchi

K. S.

Saito

and Imatake

, “Mixture Preparation and HC Emissions of a 4-Valve Engine with Port Fuel Injection During Cold Starting and Warm-up”, SAE Technical Paper No. 950074 (1995).

Kelly

N. A.

and Groblicki

P. J

, J. Air Waste Manage. Assoc. 43, 1351 (1993).

Quader

A. A.

, Trans. SAE 98, 327 (1989).

Kosowski

M. G.

, Trans. SAE 94, 786 (1985).

Quader

A. A.

Sloane

T. M.

Sinkevitch

R. M.

and Olson

K. L

, “Why Gasoline 90% Distillation Temperature Affects Emissions with Port Fuel Injection and Premixed Charge”, SAE Paper No. 912430 (1991).

Witze

P. O.

and Vilchis

F. R

, “Stroboscopic Laser Shadowgraph Study of the Effect of Swirl on Homogeneous Combustion in a Spark-Ignition Engine”, SAE Paper No. 810226 (1981).

Shiozaki

Suzuki

and Shimoda

, “Observation of Combustion Process in D.I. Diesel Engine via High Speed Direct and Schlieren Photography”, SAE Paper No. 800025 (1980).

10.

Saito

Sekiguchi

Imatake

Takeda

and Yaegashi

, “A New Method to Analyze Fuel Behavior in a Spark Ignition Engine”, SAE Paper No. 950044 (1995).

11.

Witze

P. O.

and Green

R. M

, “LIF and Flame-Emission Imaging of Liquid Fuel Films and Pool Fires in an SI Engine During a Simulated Cold Start”, SAE Paper No. 970866 (1997).

12.

Felton

P. G.

Kyritsis

D. C.

and Fulcher

S. K

, “LIF Visualization of Liquid Fuel in the Intake Manifold During Cold Start”, SAE Paper No. 952464.

13.

Meyers

Schreiber

Haug

Siemers

and Schulpin

H. J

, Imeche Semin. 5, 95 (1994).

14.

Parks

J. E.

II Armfield

J. S.

Barber

T. E.

Storey

J. M. E.

and Wachter

E. A

, Appl. Spectrosc. 52, 112 (1998).

15.

Lozano

Yip

and Hanson

R. K

, Exp. Fluids 13, 369 (1992).

16.

Grossmann

Monkhouse

P. B.

Ridder

Sick

and Wolfrum

, Appl. Phys. B 62, 249 (1996).

17.

Melton

L. A.

, Appl. Spectrosc. 47, 782 (1993).

18.

Turro

N. J.

, Modern Molecular Photochemistry (The Benjamin/Cummings Publishing Company, Menlo Park, California, 1978), Chap. 6.

19.

Shortridge

R. G.

Jr. Rusbult

G. F.

and Lee

E. K. C

, J. Amer. Chem. Soc. 93, 1863 (1971).

20.

Hunt

R. E.

Noyes

W. A.

Jr. , J. Am. Chem. Soc. 70, 467 (1948).

21.

Heicklen

Julian

, J. Am. Chem. Soc. 81, 3863 (1959).

22.

Almy

G. M.

and Anderson

, J. Chem. Phys. 8, 805 (1940).

23.

Swindal

J. C.

Dragonetti

D. P.

Hahn

R. T.

Furman

P. A.

and Acker

W. P

, “In-Cylinder Charge Homogeneity During Cold-Start Studied with Fluorescent Tracers Simulating Different Fuel Distillation Temperatures”, SAE Paper No. 950106 (1995).

24.

Baritaud

T. A.

and Heinze

T. A

, “Gasoline Distribution Measurements with PLIF in a SI Engine”, SAE Paper No. 922355 (1992).

25.

Arnold

Becker

Suntz

Monkhouse

Wolfrum

Maly

and Pfister

, Opt. Lett. 15, 831 (1990).

26.

Private communication with Prof. Richard A. Caldwell, University of Texas at Dallas.

27.

Barltrop

J. A.

and Coyle

J. D

, Excited States in Organic Chemistry (John Wiley and Sons, London, 1975), Chap. 7, pp. 180–181, 193–194.

28.

Grossmann

Monkhouse

P. B.

Ridder

Sick

and Wolfrum

, Appl. Phys. B 62, 249 (1996).

29.

Svenja

Schulz

Sick

Dreizler

Schiessl

and Mass

, “Two-Dimensional Temperature Measurements in an SI Engine Using Two-Line Tracer LIF”, SAE Paper No. 98FL370, (1998).

30.

Einecke

Schulz

and Sick

, “Dual-Wavelength Temperature Measurements in an IC Engine Using 3-pentanone Laser-Induced Fluorescence”, in Laser Applications in Environmental Analysis, Technical Digest Series (Optical Society of America, Washington, D.C. 1998), pp. 84–86.

31.

Fredenslund

Gmehling

and Rasmussen

, Vapor-Liquid Equilibria Using UNIFAC—a Group-Contribution Method (Elsevier Scientific Publishing Company, Amsterdam, 1977).

32.

Melton

L. A.

, University of Texas at Dallas.

33.

O'Sullivan

and Testa

A. C

, J. Phys. Chem. 77, 1830 (1973).