WOODWARD 8405-094 Electronic Fuel Control (EFC) System

WOODWARD 8405 - 094 Electronic Fuel Control (EFC) System is an electronic fuel control system produced by Woodward. It is designed for industrial engines and is used to accurately control fuel supply, optimize engine performance and reduce emissions. The following is a detailed introduction to its core features, working principles and application areas:

Core Features

High-precision fuel metering

Adopts a closed-loop control algorithm to monitor parameters such as engine speed, load and temperature in real time, accurately calculates the amount of fuel injection, and ensures maximum combustion efficiency.

Supports a variety of fuel types, including diesel, natural gas and mixed fuels, to adapt to different application scenarios.

Fast response and dynamic adjustment

The response time is less than 50 milliseconds, which can quickly adapt to load changes (such as sudden increase/decrease of load on the generator set) and reduce speed fluctuations.

Built-in adaptive control logic automatically compensates for the impact of engine aging or environmental changes (such as altitude, temperature) on performance.

Integrated design

Integrates controllers, actuators and sensors in one, reduces external connection points, and improves system reliability and anti-interference ability.

Compatible with other Woodward control systems (such as governors, load distribution modules), supporting seamless integration.

Fault diagnosis and protection

Real-time monitoring of system status, with diagnostic functions such as overvoltage, undervoltage, overtemperature, sensor failure, etc., and provides multi-level alarm and protection strategies.

Supports data logging and remote monitoring for preventive maintenance.

Flexible configuration and communication

Control parameters can be customized through dedicated software (such as Woodward ProAct), supporting industrial communication protocols such as Modbus and CANopen, and realizing remote monitoring and parameter adjustment.

Working principle

Signal acquisition

Real-time acquisition of engine operating status data through speed sensors, temperature sensors, pressure sensors, etc.

Control algorithm processing

The controller calculates the optimal fuel supply based on the preset mapping table (Map) and PID algorithm, combined with the feedback signal, to ensure that the engine can maintain stable speed and power output under different working conditions.

Actuator drive

The fuel pump or injector is adjusted through a high-precision solenoid valve or servo motor to accurately control the fuel flow and injection timing.

Closed-loop feedback

Continuously monitor the deviation between the actual output and the target value, dynamically adjust the control parameters, form a closed-loop control loop, and ensure control accuracy.

Applications

Power generation industry

Fuel control of diesel/gas generator sets to ensure stable frequency (e.g. 50Hz/60Hz), supporting island operation and grid-connected mode.

Industrial power equipment

Engines that drive industrial equipment such as compressors, pumps, and fans to optimize load response and fuel economy.

Marine propulsion system

Fuel control of ship main and auxiliary engines to meet reliability and emission requirements in maritime environments (e.g. IMO Tier III).

Oil and gas extraction

Precise control of engines for oil fields to adapt to harsh working conditions (e.g. high temperature, dust) and load changes.