What Causes High Fuel Consumption in Diesel Vehicles?

[Annie]

Diesel vehicles' high fuel consumption is primarily caused by incomplete diesel combustion. Below is a detailed explanation of the reasons for high fuel consumption in diesel vehicles: 1. Insufficient Compression: The main reason for incomplete diesel combustion is insufficient compression, commonly referred to as air leakage. The causes of air leakage include wear and tear of the cylinder liner, piston, and piston rings, resulting in poor sealing, as well as valve leakage due to wear of the valves or valve seats. 2. Poor Atomization: Poor diesel atomization. The main reasons for poor atomization are aging of the injector, plunger, and delivery valve, or improper injector adjustment. 3. Mechanical Faults: Incorrect fuel supply timing leads to clogged air filters and restricted air intake. Additionally, faults in the engine lubrication system can cause incorrect clearance of the intake and exhaust valves.