Browse Publications Technical Papers 710207
1971-02-01

Influence of Fuel Properties on Metering in Carburetors 710207

This paper considers the influence of the properties of gasolines and testing fluids on metering by carburetors. Since the fuel metering is controlled by orifices, the effects of fuel properties on orifice flow are analyzed. The results of an orifice testing program are presented, using the Reynolds number as the primary correlation parameter. The influences of fuel type, fuel temperature, and orifice geometry on the discharge coefficient are discussed, and the effect of a given fuel property change is shown.
Experimental values for the variations in fluid properties with fuel type and temperature are presented for commercial gasolines, carburetor testing fluids, and pure hydrocarbons. The variation of carbon-to-hydrogen ratio among gasolines is shown to cause a change in stoichiometry, which is the equivalent of an error in metering.
Experimental results which show the effect of fuel temperature on metering by a carburetor are evaluated in terms of fundamental fluid processes, and the basic factors to be considered in designing fuel channels with inherent compensation for fuel-property changes are discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

An Approach to Altitude Compensation of the Carburetor

760286

View Details

TECHNICAL PAPER

Analyzing the Influence of Gasoline Characteristics on Transient Engine Performance

912392

View Details

TECHNICAL PAPER

How Injector, Engine, and Fuel variables Impact Smoke and Hydrocarbon Emissions with Port Fuel Injection

890623

View Details

X