What is the specific role of the PTC EGT Sensor in DPF regeneration?

The Specific Role of the PTC EGT Sensor in DPF Regeneration:

1. Real-time Temperature Monitoring

The sensor is installed upstream of the DPF and collects exhaust gas temperature in real time, providing the ECU with crucial data for triggering regeneration.

2. Regeneration Control Strategy

When the exhaust gas temperature reaches a preset threshold (approximately 350°C–500°C), the ECU automatically initiates fuel injection or adjusts auxiliary means such as turbocharging and EGR to ensure that the internal temperature of the DPF further increases to above 600°C, which is necessary for burning particulate matter.

3. Improved Regeneration Efficiency

Accurate temperature feedback allows the regeneration process to occur at the optimal time, significantly increasing the particulate oxidation rate and reducing fuel consumption required for regeneration.

4. System Safety Protection

If the temperature is insufficient, the system will delay regeneration to prevent incomplete combustion; if the temperature is too high, it will suppress fuel injection to prevent DPF overheating damage, thereby extending the filter's service life.