Description

Closed Loop Fuel Control

Introduction

This engine ECU was designed to run on an open loop configuration. In turn, environmental conditions (temperature, humidity…) affect the air/fuel mixture even with a proper tune;

• Hot ambient temperature enriches the fuel mixture (more fuel)

• Cold ambient temperature leans it (less fuel)

The solution

Adding a proper O2 sensor and closed loop algorithm allows the engine ECU to read the air/fuel mixture and adjust it to compensate for the current environmental conditions.

The closed loop air/fuel ratio has targets for both cruising and full throttle situations. Cruising AFR target is leaner to provide better fuel economy while a richer target is used at high or full throttle for maximum power.

Results

• Proper power delivery under hot conditions by preventing the air/fuel mixture from being too rich

• Proper fueling when it’s very cold

• Automatic compensation relatives the sled intake and exhaust path configurations

• Maximum engine power delivery in all environmental conditions at high or full throttle

• Better fuel economy while cruising at low or mid throttle. Up to 20% less fuel consumption*.

*Results will vary depending on driving style, environmental conditions and other factors.

Usage of the Turbo Dynamics AEM Wideband O2 module (pre-wired and plug in) is required.

Failsafe protections have been implemented in the event of a sensor issue.