Air-fuel ratio (AFR) controls work in conjunction with catalysts to control and monitor the mass ratio of air to fuel in an internal combustion engine. At Alberta Governor, we carry the following AFR controls:
E3 Rich Burn integrates fuel control and catalyst control in a single system using StableSense™ Technology. Unlike first-generation A/F controls, E3 Rich Burn effectively analyzes, controls and optimizes engine and catalyst functions without continuous readjustment.
The system can be used as a stand-alone air-fuel ratio controller or as a complete gas engine emissions and engine control. It is designed for stoichiometric, spark-ignited natural-gas engines used in gas compression, power generation, pumping, and other stationary applications ranging from under 300 kW (400 hp) to over 2 MW (2700 hp). It has full authority over spark, fuel, and air. Additionally, diagnostics such as misfire detection and other health monitoring and engine protection functions are integrated into the system.
The E3 Rich Burn system-based solution analyzes and controls all of the functions of your engine and catalyst to optimize the amount of time your engine is in compliance. The system controls the air-fuel ratio through a fuel metering trim valve. By means of the exclusive StableSense™ oxygen feedback sensor in the exhaust and the unique StableSense™ control algorithm the air-fuel ratio (lambda) is controlled slightly below 1 to optimize the three-way catalyst emission reduction.
Woodward’s E3 Lean-Burn Trim system controls lean-burn industrial gas engines used in numerous power generation, pumping, and other stationary applications. The highly accurate, closed-loop control system helps customers meet regulated emission levels while maintaining engine performance over a wide range of fuel qualities.
The E3 Lean-Burn’s core functionality is an air/fuel ratio trim control using either exhaust oxygen closed loop or generator power feedback. The system can control speed/load, air/fuel ratio and spark timing/duration, at any engine load and speed condition.
The E3 Fuel Blending System uses TecJet fuel metering valves for independent, full-authority control of two different fuel streams into a single engine. The system is designed to be able to meter the two fuels in any ratio from 0% to 100%.
