Through advanced filtration technology and high - quality materials, we ensure that our DPFs meet the most stringent environmental standards helping to improve air quality and protect the environment.
Through advanced filtration technology and high - quality materials, we ensure that our DPFs meet the most stringent environmental standards helping to improve air quality and protect the environment.
Preventive Technical Scheme for High Altitude DPF Failure
1. Hardware upgrade strategy
Option 1: DPF regeneration auxiliary heating system
Technical principle: Install an electric heating wire (power 1.5kW, voltage 24V) at the front end of the DPF, and link it with the ECU through a relay to automatically start when the exhaust temperature is less than 300℃;
Actual test results: At an altitude of 3500 meters, the heating system can increase the regeneration temperature by 120-150 ℃ and shorten the regeneration time by 40%;
Installation points: It is necessary to upgrade the cooling system synchronously (increase the speed of the cooling fan by 10%) to avoid overheating and damage to the heating wire.
Option 2: High altitude specific DOC catalyst coating
Material upgrade: Adopting a ternary catalyst containing platinum (Pt) - palladium (Pd) - rhodium (Rh) (ratio 3:2:1), which increases the low-temperature activity by 40% compared to traditional coatings;
Performance parameters: ignition temperature (T50) reduced from 250 ℃ to 180 ℃; NOx conversion efficiency ≥ 85% at 400 ℃ (original factory ≤ 60%);
Compatible models: D-MAX (National VI B emission standard) after 2023.
2. Software optimization strategy
Strategy 1: ECU plateau regeneration logic adjustment
Parameter modification: Reduce the threshold for carbon loading triggered by regeneration to 10g/L; Extend the regeneration duration to 60 minutes (original factory 45 minutes); Add regeneration interrupt recovery function (allowing 3 restarts);
Actual test data: At an altitude of 4000 meters, the success rate of regeneration has increased from 65% to 92%.
Strategy 2: Intelligent driving mode linkage
Mode switching: After activating the "plateau mode", the ECU forcibly closes the EGR valve to increase the intake oxygen concentration to over 15%; Adjust the fuel injection strategy by increasing the rear fuel injection quantity by 15% and raising the exhaust temperature;
User operation: One click switching through the central control screen, or automatically triggered by GPS altitude positioning.
