Chapter 5

The Basics of Electronic Engine Control

Chapter Outline

Motivation for Electronic Engine Control

Exhaust Emissions

Fuel Economy

Federal Government Test Procedures

Fuel Economy Requirements

Meeting the Requirements

The Role of Electronics

Additional cost incentive

Concept of an Electronic Engine Control System

Inputs to Controller

Output from Controller

Definition of Engine Performance Terms

Torque

Power

Fuel Consumption

Engine Overall Efficiency

Calibration

Engine Mapping

Effect of Air/Fuel Ratio on Performance

Effect of Spark Timing on Performance

Effect of Exhaust Gas Recirculation on Performance

Exhaust Catalytic Converters

Oxidizing Catalytic Converter

The Three-Way Catalyst

Electronic Fuel-Control System

Engine Control Sequence

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