Last time we discussed the accelerator pedal transmission; this time, let’s talk about checking the vehicle’s air system. The vehicle’s air system is like the human respiratory system, crucial to the vehicle’s performance and health. Once a malfunction occurs, just like a person struggling to breathe, the vehicle will also “suffocate” and become difficult to drive.
To ensure your vehicle is always in optimal condition, today we’ll discuss the key points and order of troubleshooting the vehicle’s air system, allowing your vehicle to breathe more smoothly!
Troubleshooting Order and Key Points for the Vehicle’s Air System:
Air Filter → Intake Hose → Turbocharger → Intercooler → Combustion Chamber → Exhaust Pipe (Exhaust Butterfly Valve) → Muffler
1. Air Filter Inspection
Focus on checking the cleanliness of the air filter element, ensuring there are no blockages or debris.
2. Intake Hose Inspection
Check for leaks, blockages, or any signs of collapse during high-speed driving.
3. Intake Hose Inspection
Turbocharger Inspection: Check the oil seals on the turbine and compressor ends, and confirm the blades are intact.
4. Intercooler Inspection
Cooling Performance: Clean the radiator fins and internal pipes to ensure the intake air temperature is not too high.
Sealing Inspection: Check the intercooler for damage or blockage, and the connection of the inlet and outlet hoses.
5. Intake Heater Grille Inspection
Confirm that the intake heater grille is not deformed or blocked.
6. Air Filter and Exhaust Pipe Inspection
Focus on checking the exhaust pipe for blockage, the amount of carbon buildup in the front and rear exhaust pipes, and the flexibility and sealing of the exhaust brake butterfly valve.
7. Muffler Inspection
Check the muffler and SCR box for blockages, ensuring they do not affect intake pressure.
8. Intake Pressure and Temperature Inspection
Check the corresponding intake pressure value according to engine power; confirm the impact of intake air temperature on engine power.
Precautions for Using Euro VI Vehicles
In addition to the above, truck drivers need to pay special attention to the usage points of China VI emission standard vehicles, as they have higher requirements for fuel, engine oil, and driving habits.
1. Fuel and Engine Oil Selection
Using inferior engine oil and diesel fuel will seriously affect the performance of the DPF (Diesel Particulate Filter), accelerating its clogging. To ensure vehicle performance and emissions meet standards, please choose high-quality fuel and engine oil purchased from legitimate channels.
2. The Impact of Sulfur Content
High sulfur content in inferior diesel fuel can lead to DOC (Diesel Oxidation Catalyst) poisoning, thus significantly reducing the passive and active regeneration efficiency of the DPF. Therefore, controlling the sulfur content in fuel is crucial.
3. Ash Content in Engine Oil
Inferior engine oil may contain a large amount of non-combustible ash. This ash will continuously accumulate inside the DPF and cannot be removed through the regeneration process; it can only be treated through a specialized ash removal function. To avoid such problems, it is recommended to use engine oil that meets the China VI standard.
4. Driving Habits
The driver’s driving habits have a significant impact on the vehicle’s power performance and fuel consumption. For example, attempting to gain more power with a small throttle opening, or using so-called “fuel-saving tricks” such as low-speed shifting and high-speed hill climbing, may actually lead to insufficient vehicle power and increased fuel consumption. Drivers are advised to maintain a smooth driving habit and rationally select throttle opening and shifting timing according to vehicle and road conditions.
Through the above troubleshooting steps and key points, truck drivers should now have a more comprehensive and detailed understanding of troubleshooting vehicle air system faults. Please remember that regular inspection and maintenance of your vehicle is the only way to ensure your vehicle is always in good working order and runs smoothly.
