Woodward 8404-2001 L-Series Electronic Throttle Controller

Product Description

The 8404-2001 is an electronically integrated throttle and speed control unit from Woodward’s L-Series, engineered to replace conventional mechanical and hydraulic governor systems. The device combines a bidirectional electric actuator with onboard digital control electronics, enabling direct and accurate positioning of the engine throttle or fuel rack without auxiliary linkages or fluid-based components.

Designed initially for gasoline reciprocating engines, this controller delivers consistent speed stability across changing load conditions while simplifying system architecture. By consolidating actuation and control into a single compact assembly, the unit reduces installation complexity, improves response accuracy, and lowers long-term maintenance demands.

Technical Characteristics

• Model: 8404-2001
• Manufacturer: Woodward
• Product Family: L-Series Position Controllers
• Control Function: Electronic engine speed regulation and throttle positioning
• Actuation Method: Integrated bidirectional electric actuator
• Control Technology: Digital speed and position feedback control
• Mechanical Interface: Direct throttle plate or fuel rack connection
• Governor Type: Fully electronic, non-hydraulic
• Intended Fuel Type: Gasoline
• Primary Engine Class: Reciprocating internal combustion engines
• Supply Voltage: 24 VDC nominal
• Signal Interface: Analog speed reference and position feedback
• Dynamic Response: Optimized for rapid load transients
• Environmental Design: Industrial-grade enclosure for engine-mounted use

Functional Advantages

The 8404-2001 eliminates external mechanical governors, hydraulic pumps, and linkage assemblies by embedding motion control and logic within one device. This architecture enhances reliability, reduces backlash-related inaccuracies, and ensures repeatable speed control over the engine’s operating range.

Compared with traditional governors, the L-Series controller offers superior precision, faster response to load changes, and simplified commissioning for electronically managed engine systems.

Application Scenarios

• Stationary gasoline engine generator sets
• Industrial power units requiring electronic speed control
• Engine-driven pumps and compressors
• OEM engine platforms transitioning from mechanical to electronic governing

FAQ

Can the 8404-2001 replace a mechanical governor directly? Yes. The unit is designed as a functional electronic replacement for mechanical and hydraulic governors, provided the engine interface and control signals are compatible.

Is this controller suitable for diesel engines? This model was developed primarily for gasoline-fueled reciprocating engines. Diesel applications typically require different calibration and controller variants.

Does the actuator require external drive electronics? No. The actuator and digital control electronics are fully integrated into the housing.