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The Woodward 8404-7207 is a specific part number within the L-Series of integrated control systems. It’s a highly capable unit that combines an electric actuator with an embedded speed controller, and importantly, an Integrated Throttle Body (ITB).
WOODWARD 8404-7207: L-Series Integrated Throttle Body (ITB) with Speed Control
The Woodward 8404-7207 represents a specialized configuration within Woodward’s L-Series. This unit is a compact, all-in-one solution designed for precise speed control of engines, particularly those using gaseous fuels or requiring precise air/fuel ratio control, thanks to its integrated throttle body.
Product Overview
- Product Type: Integrated Electric Actuator, Speed Controller, and Throttle Body (ITB)
- Manufacturer: Woodward
- Series: L-Series
- Function: Controls engine speed by precisely managing air/fuel flow via the integrated throttle body.
- Design: Microprocessor-based control integrated directly into the electric actuator and throttle body assembly.
- Throttle Body Size: The “43 mm” specification often associated with this part number indicates the diameter of the throttle body, suitable for specific engine sizes and airflow requirements.
- Key Features: Includes integrated speed control software, comprehensive diagnostics, default parameters, and a highly responsive electric actuator.
Detailed Description
The Woodward L-Series is known for its advanced, compact, and integrated solutions for engine management. The 8404-7207 takes this a step further by incorporating a throttle body directly into the actuator-controller package. This design offers several significant advantages:
- All-in-One Integration: By combining the actuator, electronic speed controller, and the throttle body into a single unit, the 8404-7207 simplifies installation, reduces wiring complexity, minimizes potential points of failure, and saves space on the engine.
- Precise Speed Control: The embedded microprocessor-based control provides sophisticated algorithms for speed sensing and regulation. This ensures stable and accurate engine speed, which is crucial for applications like power generation where frequency stability is paramount, or for industrial machinery requiring consistent operational speed.
- Integrated Throttle Body (ITB): The inclusion of the throttle body allows for direct and precise control over the air intake to the engine. This is particularly beneficial for gaseous-fueled engines or those requiring strict air/fuel ratio management for emissions control and optimal performance. The 43 mm size indicates its application range.
- Programmability and Default Parameters: Like other L-Series units, this control is highly configurable using Woodward’s PC-based service tool software. This allows users to fine-tune speed setpoints, dynamics (PID tuning), fuel/air limiting, and start/stop behavior. The “Default Parameters” in its description suggest it comes pre-configured for common applications, simplifying initial setup.
- Robust and Responsive Actuation: The electric actuator component utilizes a high-efficiency torque motor that delivers consistent and responsive control over the throttle plate’s position.
- Comprehensive Diagnostics: The unit includes built-in diagnostics to facilitate troubleshooting, often with relay driver outputs to signal fault or error conditions.
Applications
The Woodward 8404-7207 is typically used in:
- Gaseous Engine Control: For precise speed and air/fuel control in natural gas, LPG, or other gaseous-fueled engines in various industrial applications.
- Power Generation: Controlling engine-generator sets to maintain stable electrical frequency, especially in distributed generation or cogeneration setups where precise load response is needed.
- Industrial Pumps, Compressors, and Fans: Where engines drive these machines, the ITB allows for highly accurate speed and flow regulation.
- Specific OEM Engine Applications: Tailored for engine manufacturers who integrate this compact, high-performance solution directly into their engine designs.
Related Products/Series
The Woodward 8404-series encompasses various configurations of the L-Series, including stand-alone actuators, position controllers, and ITB units. Some related part numbers might include:
- 8404-7208: This would typically be another L-Series ITB with Speed Control, but with a different throttle body size, such as 50 mm, for larger engines.
- 8404-20XX series: Often refers to L-Series Position Controllers with ITB (e.g., 8404-2008, which might be similar to 8404-7208 but a position controller instead of a speed controller).
- 8404-71XX series: Refers to L-Series standalone speed control actuators (without the integrated throttle body), like the 8404-7101 discussed previously.
