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Dongfeng Truck Engine Spare Parts, Diesel Engine Parts, Turbocharged 3773169

The Cummins 3773169 Turbocharger Electronic Actuator is an original equipment (OE) electro-mechanical control unit designed specifically for Variable Geometry Turbochargers (VGT) used on modern Cummins diesel engines. As a core component of the engine’s air management system, it precisely controls the position of the turbine inlet vanes by adjusting the nozzle ring angle — enabling optimal boost pressure across the entire engine speed range.

This actuator receives real-time signals from the Engine Control Module (ECM) via CAN bus communication and drives an internal stepper motor to modulate exhaust gas flow through the turbocharger. The result is improved low-end torque, enhanced fuel efficiency, reduced emissions, and better drivability — especially under transient loads.

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Model:
3773169
Brand:
Dongfeng

Product Description

Attribute	Description
Product Name	Turbocharger Electronic Actuator / VGT Controller
Function	Controls vane position in variable geometry turbocharger to regulate boost pressure
Control Type	Electronically controlled via ECM; uses stepper motor with closed-loop feedback
Communication Protocol	CAN Bus (Controller Area Network) interface
Actuation Mechanism	Precision gear-driven linkage connected to turbocharger vane ring
Housing Material	Reinforced engineering plastic or die-cast aluminum with high thermal resistance
Environmental Protection	Sealed housing with high IP rating (typically IP67) for dust and water resistance
Operating Principle	Converts electrical signal into mechanical motion to adjust turbine flow area

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Parameter	Specification
Part Number (OEM)	3773169
Replacement Service Part	4034090 (officially designated upgrade/replacement)
Voltage Supply	12V DC (standard for light/medium-duty systems)
Signal Input	Digital PWM/CAN command from ECM
Position Feedback	Integrated potentiometer or Hall-effect sensor for real-time closed-loop control
Response Speed	Millisecond-level adjustment capability
Position Accuracy	Micron-level precision ensures consistent vane control
Adjustment Range	Full open to full close sweep (~90° rotation)
Operating Temperature	-40°C to +130°C (engine bay compatible)
Durability	Rated for over 1 million actuation cycles under normal conditions
Mounting Type	Bolt-on flange mount with mechanical lever connection to turbocharger