cummins engine spare parts Urea Nozzle A061L204 in stocked

Equipped with a piezoelectric actuator and a 0.3mm-diameter precision orifice, the nozzle delivers ultra-accurate urea injection: controlling dosage from 0.5 to 8 kg/h with a tolerance of ±2%—critical for meeting EPA Tier 4 Final and Euro VI emission standards (limiting NOx to 0.2 g/kWh). The piezoelectric actuator responds in 0.1 milliseconds, enabling the ECU to adjust injection frequency (up to 100 pulses per second) based on exhaust NOx levels, engine load, and temperature. This precise control ensures optimal mixing of urea (DEF) with exhaust gases, maximizing SCR catalyst efficiency (up to 95% NOx conversion) and avoiding urea crystallization (a common issue with over-injection). Compared to solenoid-driven nozzles, its injection accuracy reduces DEF consumption by 8–10% while maintaining emission compliance

Engineered to withstand the corrosive nature of diesel exhaust fluid (DEF, 32.5% urea solution) and high-temperature exhaust gases (up to 550°C), the nozzle features a robust, corrosion-resistant construction:

Nozzle Body: 316L stainless steel (with a passivated surface) that resists urea-induced corrosion and pitting—tested to 2,000 hours of immersion in DEF with no material degradation.

Orifice & Actuator: Ceramic orifice (alumina, 99.5% purity) that maintains dimensional stability at high temperatures and a titanium alloy piezoelectric actuator (resisting oxidation up to 600°C).

Seals: Fluorocarbon rubber (FKM) seals that are DEF-compatible and retain elasticity from -40°C to 200°C, preventing urea leakage at the inlet port and mounting flange.

These materials extend the nozzle’s service life to 150,000 km (typical for Cummins X15 engines), reducing replacement frequency and maintenance costs

To solve the industry-wide problem of urea crystallization (which clogs nozzles and disables SCR systems), the nozzle integrates two key protective features:

Post-Injection Purge: After engine shutdown, the nozzle automatically triggers a 10-second air purge (using the vehicle’s compressed air system) to clear residual urea from the orifice and internal channels—eliminating standing urea that crystallizes as it dries.

Heated Orifice: A built-in 5W cartridge heater (controlled by the SCR ECU) that maintains the orifice temperature above 60°C (the melting point of urea crystals) when the engine is running, even in cold weather (-40°C startup). This prevents existing crystals from blocking the orifice and ensures consistent injection.

These design elements reduce crystallization-related failures by 90% compared to non-heated, non-purging nozzles

Designed for efficient maintenance by fleet technicians, the nozzle simplifies installation and troubleshooting with user-friendly features:

Direct Connection: The 4-pin electrical connector matches the SCR harness (color-coded for error-free wiring), and the 12mm inlet port uses a quick-connect DEF line fitting—no cutting, crimping, or specialized tools required.

Built-In Diagnostics: The nozzle transmits real-time data (injection pressure, heater temperature, actuator status) to the ECU, which flags faults (e.g., clogged orifice, heater failure) via DTC codes (Diagnostic Trouble Codes). This allows technicians to identify issues in minutes, not hours.

No Calibration Needed: As an OEM component, the nozzle is pre-calibrated to Cummins’ SCR system parameters, so it works immediately after installation—no dealer programming or dosage adjustment required.

Installation takes 20–25 minutes: disconnect the DEF line and electrical connector from the old nozzle, unbolt the mounting flange (10mm socket), install the new nozzle, reconnect components, and verify purge function. Each unit undergoes 100% performance testing (injection accuracy, heating efficiency, purge operation) and leak verification, backed by a 24-month OEM warranty against defects (e.g., orifice clogging, heater failure, actuator malfunction)