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The Woodward 8404-7101 is a specific part number for an L-Series Electric Actuator with Integrated Speed Control. This is a highly integrated and compact solution designed for precise speed control of diesel or gaseous engines.
WOODWARD 8404-7101: L-Series Electric Actuator with Integrated Speed Control
The Woodward 8404-7101 represents a configuration within Woodward’s L-Series, which combines an electric actuator with embedded, microprocessor-based speed control software into a single, compact package. This eliminates the need for a separate driver box and speed control unit, simplifying installation and reducing complexity.
Product Overview
- Product Type: Integrated Electric Actuator and Speed Controller
- Manufacturer: Woodward
- Series: L-Series
- Function: Controls the speed of diesel or gaseous engines.
- Design: Microprocessor-based control integrated directly into the electric actuator.
- Output: High-efficiency torque motor providing precise rotary output.
- Key Features: Includes integrated speed control software, comprehensive diagnostics, and end-of-line programmability.
- Shaft Configuration: Typically involves a specific shaft configuration for connection to the engine’s fuel or air control device. For the 8404-7101, it is often listed as having Shaft 6 active in selection charts.
Detailed Description
The Woodward L-Series is a state-of-the-art solution for engine speed management. The 8404-7101 specifically offers:
- Integrated Design: This is a key advantage, as it merges the actuator (the mechanical part that moves the fuel/air control) and the electronic speed controller into one unit. This reduces wiring, installation time, and potential points of failure.
- Microprocessor-Based Control: The embedded software provides sophisticated speed sensing and control algorithms. This allows for precise and stable speed regulation, critical for applications like power generation or industrial machinery.
- Programmability: The L-Series controls are highly configurable. Using Woodward’s service tool software (PC-based), users can program various parameters such as speed setpoints (including overspeed), dynamics (PID tuning), fuel limiting, and start/stop behavior to match specific engine characteristics and application requirements.
- High-Efficiency Torque Motor: The actuator’s motor delivers consistent torque over its travel range (typically 60 degrees nominal travel), allowing it to effectively operate fuel pumps, mixers, or throttle bodies.
- Comprehensive Diagnostics: The unit includes built-in diagnostics to facilitate troubleshooting. A relay driver output is available to signal fault or error conditions.
- Versatile Application: While often associated with diesel and gaseous engines, its flexibility allows it to interface with various fuel control devices.
- Robust Construction: Designed to operate in demanding engine environments, with an ambient temperature range typically from –40 to +105 °C (–40 to +221 °F).
The 8404-7101 is sometimes listed as a replacement or alternative for older control systems like the ST-125™ speed control, offering enhanced features and a more compact footprint.
Applications
The Woodward 8404-7101 is widely used in:
- Diesel Engine Control: For precise speed and load control in a variety of diesel engine applications.
- Gaseous Engine Control: Managing the speed of natural gas or other gaseous-fueled engines.
- Power Generation: For controlling engine-generator sets to maintain stable electrical frequency.
- Industrial Pumps and Compressors: Where engines drive these machines, the L-Series provides accurate speed regulation.
- Mobile Equipment: Applicable to on- and off-highway mobile applications requiring reliable engine speed control.
Related Products/Series
The Woodward 8404-series covers various configurations of the L-Series actuators and controls. Examples include:
- 8404-1001: Another L-Series Actuator Speed Control, often listed as a prior version or similar variant.
- 8404-1004: L-Series Actuator Speed Control, potentially with different shaft configurations or features.
- 8404-7104: L-Series Speed Control, similar to the 8404-7101 but potentially with a different shaft configuration or specific options.
- 8404-2000 series: Often refers to L-Series Position Controllers or models integrated with Intake Throttle Bodies (ITB).
- 8404-3000 series: May include L-Series Trim Valves or other specific control functions.
When sourcing or replacing an L-Series component, it’s always critical to confirm the full part number and specific application details to ensure compatibility.
