Diesel engines produce soot that accumulates in the Diesel Particulate Filter (DPF). If left unchecked, this buildup can clog filters, reduce engine performance, and increase emissions. This is where PM sensors come into play.

What is DPF Regeneration?

DPF regeneration is the process of burning off the collected soot to clean the filter. This can be either passive (natural high-temp exhaust) or active (using extra fuel injection or heating elements).

How PM Sensors Help

PM sensors monitor soot concentration in real-time. When levels reach a threshold, the engine control unit (ECU) is signaled to initiate regeneration. This ensures timely cleaning without waiting for performance issues to arise.

Sensor Placement and Calibration

For accurate readings, PM sensors are typically installed downstream of the DPF. Proper calibration is critical to avoid false triggers or missed regeneration events.

Benefits

• Improved fuel efficiency through optimized regeneration cycles
• Longer DPF lifespan due to preventive maintenance
• Lower emissions with less soot expelled into the environment
• Regulatory compliance across EU and US standards

Common Issues and Solutions

• Sensor fouling: Use self-cleaning sensors or set regular maintenance intervals
• ECU compatibility: Choose sensors with CAN communication support
• Delayed response: Opt for low-latency models with faster detection algorithms

Conclusion

A well-integrated PM sensor system helps user operators reduce operating costs while ensuring they meet global emissions regulations. Our diesel PM sensors are engineered to deliver precision, reliability, and compliance for modern engine platforms.