1982-02-01

Retrofit Feedback Control of A/F Ratio and Ignition Timing for Fuel Economy 820389

An electronic engine management system has been developed to control both ignition timing and air-fuel (A/F) ratio to maximize fuel economy. Both controls employ feedback techniques and are therefore intrinsically adaptable to a wide variety of models, as required for a universal retrofit market. The ignition control loop monitors the position of the combustion pressure peak while the mixture control loop senses the lean limit as defined by a roughness threshold. Test results demonstrate fuel economy and transient operation. A brief background to the New Zealand energy conservation program is in included as background to the system’s specification.

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

A Thermodynamic Study on Boosted HCCI: Experimental Results

2011-01-0905

View Details

TECHNICAL PAPER

Validation of Turbulent Combustion and Knocking Simulation in Spark-Ignition Engines Using Reduced Chemical Kinetics

2015-01-0750

View Details

TECHNICAL PAPER

A Comparison of Two Injectors in Mixture Preparation for a High Tumble GDI Engine - A CFD Study

2012-01-0398

View Details

X