1971-02-01

The Chrysler Method of Carburetor Idle Flow Correlation 710169

In the continuing search for reduced exhaust emissions from automotive engines, tighter controls on production carburetor fuel-air ratio delivery became necessary. Idle fuel and airflow measurement assumed major importance due to the influence of idle set points on exhaust emissions and on the part throttle flow curve of the carburetor.
This paper details the development of idle fuel and airflow measurement transfer systems to correlate data between test stations, including the use of carburetors locked in the idle position. Matched sets of sonic flow nozzles are currently in use at each test location as a basis for defining carburetor idle airflow. Fuel flow, using a test fluid developed specifically for this application, is defined by a simple, accurate weight time calibrator.
The current system requires only the transmittal of data between test locations and is now entering its second year of production application.

SAE MOBILUS

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

Access SAE MOBILUS »

Members save up to 18% 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

CARBURETOR DESIGN AND CALIBRATION

530279

View Details

TECHNICAL PAPER

Process and Control for Producing Anti-Emission Carburetors

690138

View Details

TECHNICAL PAPER

Development of Direct and Fast Response Gas Measurement

2008-01-0758

View Details

X