Structure of the Bosch Common Rail Injector (0445110395)
This injector is a solenoid-controlled high-pressure fuel injector designed for precise fuel metering in diesel engines. Its key components include
A. Main Components
Nozzle Assembly
Spray Nozzle (Hole Type) – Typically has multiple micro-holes for fine atomization (e.g., 6-8 holes).
Needle Valve – Opens under hydraulic pressure to release fuel.
Solenoid Valve (Actuator)
High-Pressure Connection
Control Chamber & Hydraulic Servo System
Uses fuel pressure to assist in rapid needle movement.
Ensures quick opening/closing for multiple injection events (pilot, main, post-injection).
Filter & Leak-Off Connection
B. How It Works
The ECU sends an electrical signal to the solenoid.
The solenoid opens, releasing pressure in the control chamber.
The needle valve lifts, injecting fuel into the combustion chamber.
After injection, the solenoid deactivates, closing the valve.
2. Applicable Models (Vehicles & Engines)
This injector is widely used in Volkswagen Group diesel engines, particularly in 1.9 TDI & 2.0 TDI variants.
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