L-Series 8404-2001 Controller | Electronic Throttle Speed Controller

Product Overview

The Woodward 8404-2001 is an L-Series Position Controller that integrates a bi-directional electric actuator with digital speed and position control electronics. It was developed as a fully electronic alternative to mechanical and hydraulic governors.

This unit provides direct throttle plate or fuel rack actuation. Moreover, it eliminates external linkages and hydraulic circuits that often increase maintenance complexity.

Originally introduced for gasoline-fueled reciprocating engines, the 8404-2001 delivers stable speed regulation under changing load conditions. Therefore, it remains valuable for maintaining legacy generator and industrial engine systems.

The modular architecture supports both speed control and position control modes. In addition, this flexibility simplifies retrofits within existing Woodward-based control systems.

Technical Specifications

Manufacturer: Woodward
Model number: 8404-2001
Series: L-Series Position Controller
Product type: Speed Controller / Throttle Governor
Functional description: Electronic throttle actuation with integrated speed control
Control technology: Digital speed controller with bi-directional electric actuator
Actuator type: Limited Angle Torque (LAT) motor
Mechanical travel: Approximately 75° rotary motion
Power supply: 24 VDC nominal
Control inputs: Digital and analog signals from engine control systems
Response behavior: Fast dynamic response during load transients
Operating temperature range: –40 °C to +85 °C
Enclosure material: Die-cast aluminum industrial housing
Form factor: Compact throttle body style design
dimensions: 300 × 200 × 100 mm
Weight: 3–4 kg
Certifications: CE, UL, RoHS compliant
Production status: Legacy / discontinued series

FAQ

Q1: What is the primary function of the Woodward 8404-2001?
A1: It provides electronic throttle actuation and digital speed control for reciprocating engines.

Q2: Is the 8404-2001 still in active production?
A2: No, it belongs to a discontinued legacy L-Series product line.

Q3: What engine types typically use this controller?
A3: It was commonly applied to gasoline-fueled reciprocating engines.

Q4: Does this unit replace hydraulic governors?
A4: Yes, it was designed to replace mechanical and hydraulic governing systems.

Q5: Can the 8404-2001 be repaired or replaced today?
A5: Yes, it remains available through specialist suppliers for repair or replacement purposes.