Description

The Bosch fuel injector (0445110423) used in the A20DT engine is a solenoid-operated diesel injector with the following key structural characteristics:

1. Nozzle & Tip Design

• Multi-hole nozzle (typically 5-7 holes) for precise fuel atomization.

• Pintle-free design (common in modern diesel injectors) for better spray pattern control.

• High-pressure sealing cone at the base to withstand combustion chamber pressures.

2. Solenoid Actuation

• Electromagnetic solenoid for fast, precise opening/closing.

• High-tension coil for rapid response (controlled by ECU pulse signals).

3. Internal Components

• Needle valve (spring-loaded) for fuel cutoff.

• Pressure chamber to maintain hydraulic balance.

• Filter basket at the inlet to prevent debris entry.

4. Fuel Connections

• High-pressure inlet (for common rail feed).

• Leak-off return line (to divert excess fuel back to the tank).

5. Electrical Connector

• Waterproof electrical plug (usually 2-pin) for ECU signal input.

6. Calibration & Coding

• Laser-etched calibration code for ECU programming.

• Precision-machined body for exact fitment in the cylinder head.

  Diesel Fuel Injector Supplier

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