Numerical and Theoretical Fuel Flow Analysis of Small Engine Carburetor Idle Circuits

Terry L. Hendricks; Timothy A. Shedd; Greg F. Nellis

doi:10.4271/2006-32-0111

2006-11-13

Numerical and Theoretical Fuel Flow Analysis of Small Engine Carburetor Idle Circuits 2006-32-0111

This paper presents a theoretical analysis of the fuel and air flows within the idle circuit found in simple carburetors. The idle circuit is modeled numerically using a dynamic model that considers the resistances of the flow paths as well as the inertia of the fuel. The modeling methodology is flexible, in that the organization and techniques can be applied to any configuration and geometry. The numerical model calculates the fuel flow response of carburetor idle/transition circuits to pressure variations associated with air flow through the venturi and around the throttle plate. The model is implemented for a typical small engine carburetor and the nominal results are presented for this specific design.

SAE MOBILUS

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

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Numerical and Theoretical Fuel Flow Analysis of Small Engine Carburetor Idle Circuits 2006-32-0111

SAE MOBILUS