DPF maintenance plan in short distance commuting scenarios

1. Passive regeneration limitations of urban congested road conditions

During peak hours in the morning and evening, the average speed of vehicles is below 30km/h, and the exhaust temperature is difficult to exceed 300 ℃, resulting in a passive regeneration efficiency of less than 15%. At this point, it is important to note:

Avoid frequent start stop: The single driving distance should be greater than 8 kilometers

Turn off automatic start stop: prevent the regeneration process from being interrupted

Monitoring dashboard: When the DPF indicator light flashes, active regeneration must be completed within 24 hours

Risk warning: A user commutes only 5 kilometers per day, and after a week of continuous DPF blockage alarm, it was found during maintenance that the carbon load of the filter element reached 28g/L (the limit value is 30g/L).

2. Parking regeneration operation specifications

When the DPF indicator light turns yellow and stays on, the following steps need to be performed:

Environmental preparation: Choose a flat ground, turn off the air conditioning and onboard appliances

Operation process: Shift into N gear, press and hold the regeneration button for 3 seconds after the handle brake water temperature reaches 65 ℃, and the engine speed will automatically increase to 2200-2600rpm

Safety monitoring: Do not step on the clutch/brake pedal and keep the doors closed throughout the entire process. After regeneration is complete, the engine speed drops back to 750rpm

Actual test data: At an ambient temperature of 25 ℃, completing a parking regeneration takes 38 minutes and consumes approximately 0.3L of fuel.