The Bosch fuel injector (0445110726) used in the Hyundai/Kia D4EB (2.0L CRDi) engine is a piezoelectric common rail diesel injector, featuring advanced design and precision engineering for optimal performance.

Structural Characteristics:

• Piezo-Electric Actuator
• Uses a piezoelectric crystal stack instead of a traditional solenoid, enabling faster response times (up to 5x quicker than solenoid injectors).
• Allows for multiple injection events per cycle (pilot, main, and post injections) for smoother combustion.
• High-Precision Nozzle

• Micro-machined spray holes (typically 6-8 holes) ensure fine atomization of diesel fuel for better combustion efficiency.
• Tapered seat design reduces leakage and improves sealing.
• Integrated Control Valve

• Directly regulates fuel flow with minimal hydraulic losses.
• Reduces internal pressure fluctuations for more stable injection.
• Robust Construction

• Made from high-strength materials to withstand high-pressure (up to 2,000 bar) common rail systems.
• Resistant to thermal and mechanical stress.

Technical Advantages:

✓ Ultra-Fast Response – Piezo technology allows for precise, near-instantaneous fuel delivery, improving emissions and performance.
✓ Multiple Injection Events – Supports pilot, main, and post injections for quieter operation and reduced NOx/soot emissions.
✓ Higher Pressure Tolerance – Works efficiently in modern high-pressure common rail (HPCR) systems.
✓ Improved Fuel Economy – Optimized spray pattern ensures complete combustion, reducing fuel consumption.
✓ Lower Emissions – Helps meet Euro 5/6 standards by enabling cleaner combustion.