In automotive NVH (Noise, Vibration, Harshness) engineering, engine cover acoustics critically impact vehicle refinement. Polyurethane (PU) foam filling has become the preferred solution for enhancing cover NVH performance due to its superior sound absorption, vibration damping, and sealing properties. Yet traditional foaming processes struggle with cell uniformity, density consistency, and closed-cell rate control, leading to unpredictable NVH results and higher development costs.
Feilong Polyurethane Equipment delivers a quantifiable, customizable NVH solution through millisecond closed-loop control and an end-to-end validation system, ensuring precise performance targets are met.
I. Precision Process Control: Foundation of NVH Performance
Feilong Polyurethane Equipment dynamically regulates core parameters:
- Temperature Management (±0.5°C)Dual-cycle thermal control stabilizes Component A/B temperatures.Dynamic mold temperature zoning ensures ≤1.5% density variation.
- Pressure & Flow RegulationServo-driven metering pumps with real-time pressure profiling.Mixing ratio accuracy (±0.5%) guarantees foam reproducibility.High-pressure mixing (150-200 bar) achieves >90% closed-cell rate.
II. Data-Led Performance Validation: Ensuring NVH Targets
Integrated verification tools:
Real-Time Process Monitoring
- Full parameter tracing (temp/pressure/flow) with digital twin records.
- Online density sensors (microwave/X-ray) maintain ≤±3% density deviation.
Laboratory-Grade NVH Testing
- Sound Transmission Loss (STL) per reverberation-anechoic chamber tests.
- Sound Absorption Coefficient via impedance tube (ISO 10534-2).
- Vibration Transfer Function (VTF) quantification.
III. Core Technologies Enabling NVH Customization
- Adaptive Process Control (APC)Self-learning IIoT algorithms compensate for material variances.
- Modular Flexible PlatformRapid reconfiguration for cover size/NVH goals/cycle times.
- Multi-Axis Robotic PouringSeam-edge sealing eliminates sound leakage paths.
- High-Reliability DesignIndustrial-grade components ensure >95% operational uptime.
Conclusion: Redefining NVH Engineering Through Precision Manufacturing
Feilong Polyurethane Equipment enables:
Process Control → Predictable microcellular structures
Data Validation → Certified NVH performance
Modular Technology → Scalable customization
Achieve quantifiable NVH optimization for engine covers with industry-leading process stability.
